Polyamide compositions, methods for their manufacture, their applications and articles manufactured therefrom

Abstract

The present invention discloses a polyamide composition comprising at least one polyamide, hollow glass bubbles, and an impact modifier, the impact modifier comprising a combination of a grafted impact modifier and a non-grafted impact modifier. The polyamide composition of the present invention improves the mechanical properties, particularly toughness, and the balance between stiffness and toughness, of a molded article produced from the composition without simultaneously impairing the weight reduction effect.

Description

[Technical field]

[0001] The present invention relates to a polyamide composition, in particular to a polyamide composition having low density and good toughness. The present invention also relates to a method for making the composition, its application, and articles made from the composition.

[0002] Background technology Polyamides, commonly known as nylon resins, are known to possess an outstanding combination of strength, toughness and solvent resistance, and therefore nylon resins are finding increasing use in automotive and electrical applications.

[0003] Environmental protection and operating cost considerations have led to an increased focus on fuel economy in the automotive industry, resulting in the substitution of heavier metals for lighter materials, and lightweight materials have become paramount in the field of hand-hold electronics, as miniaturization and portability are increasingly becoming major goals and of major concern to manufacturers and consumers.

[0004] It has been disclosed that polyamide compositions containing hollow glass bubbles are used as such lightweight materials. For example, polyamide compositions containing at least one polyamide, hollow glass bubbles and reinforcing fibers, and the application of the polyamide compositions in lightweight parts, especially lightweight parts for vehicles, have been disclosed. When hollow glass bubbles are added to a polyamide composition, the material can be lighter, but on the other hand, the mechanical properties of the resulting composition or the molded body produced from this composition, such as tensile strength index, bending strength index, etc., tend to be inferior. Attempts have been made to treat the surface of hollow glass bubbles with a coupling agent, but the mechanical properties required in the field of electronic and automotive parts are still not desirable with such surface treatment, for example, WO 2012 / 151178 discloses a combination of polyamide 6,6 and hollow glass microspheres surface-treated with a silane coupling agent; however, the deficiency of this reference is that the tensile strain at break is reduced to reduce the density.

[0005] Therefore, in addition to surface treatment of hollow glass bubbles, there is a continuing need in the field to improve the mechanical properties, particularly the toughness, of molded articles produced from the compositions, without simultaneously sacrificing the weight-saving effect, and to maintain a balance between stiffness and toughness.

[0006] Summary of the Invention The inventors of the present invention have attempted to solve the above problems and have found that the combination of polyamide and impact modifier can improve the elongation of low density polyamide materials while still providing acceptable stiffness to the resulting material. They have also found that polyamide and impact modifier have a contributing effect of reducing the density of the polyamide composition.

[0007] In a first aspect of the present invention, there is provided a polyamide composition comprising at least one polyamide, hollow glass bubbles, and an impact modifier, characterized in that the at least one polyamide is selected from a polyamide having repeating units of formula (I) and a polyamide having repeating units of formula (II), and the impact modifier comprises a combination of grafted and ungrafted impact modifiers: [ka] In the formula, R 1 are independently the same or different and are a divalent hydrocarbon group having 8 to 40 carbon atoms, preferably an alkylene group or a cycloalkylene group, R 2 are independently the same or different and are a divalent hydrocarbon group having 4 to 40 carbon atoms, preferably an alkylene group or a cycloalkylene group, R 3 are independently the same or different and are a divalent hydrocarbon group having 7 to 38 carbon atoms, preferably an alkylene group or cycloalkylene group.

[0008] In a second aspect of the present invention, there is provided a polyamide composition comprising a combination of at least two polyamides, hollow glass bubbles, and an impact modifier, characterized in that one of the at least two polyamides has a repeat unit of formula (V) and another of the at least two polyamides has a repeat unit of formula (VI) or formula (VII): [ka] In the formula, R 7 are independently the same or different and are a divalent hydrocarbon group having 4 to 6 carbon atoms, preferably an alkylene group or a cycloalkylene group, R 8 are independently the same or different and are a divalent hydrocarbon group having 7 to 10 carbon atoms, preferably an alkylene group or a cycloalkylene group, R9 are independently the same or different and are a divalent hydrocarbon group having 10 to 39 carbon atoms, preferably an alkylene group or a cycloalkylene group, R 10 are independently the same or different and are a divalent hydrocarbon group having 6 to 40 carbon atoms, preferably an alkylene group or a cycloalkylene group, R 11 are independently the same or different and are a divalent hydrocarbon group having 8 to 38 carbon atoms, preferably an alkylene group or a cycloalkylene group, The total number of carbon atoms in formula (VII) is greater than 18.

[0009] The present invention further provides a method for making a polyamide composition comprising combining all of the components of the polyamide composition.

[0010] The present invention further provides articles made from said polyamide compositions.

[0011] In accordance with the present invention, articles made from the polyamide composition achieve both lower density and good toughness, particularly higher tensile strain at break.

[0012] Furthermore, the present invention provides the use of the polyamide composition in lightweight parts, especially for automotive parts and mobile electronic devices.

[0013] Detailed Description of the Invention Unless otherwise defined, all technical and scientific terms used herein have the meaning commonly understood by one of ordinary skill in the art to which this invention belongs. As used herein, the following terms have the following meanings unless otherwise specified:

[0014] As used herein, the articles "a" and "an" refer to one or to more than one (i.e., to at least one) of the grammatical object of the article. By way of example, "an element" means one element or more than one element.

[0015] As used herein, the term "about" indicates a range of numerical values ​​that one of skill in the art would consider equivalent to the recited value, in the context of achieving the same function or result.

[0016] As used herein, the term "including one" should be understood to be synonymous with the term "including at least one," and "between" should be understood as including a limitation.

[0017] Unless otherwise specified, all percentages (%) are "percent by weight."

[0018] The radical definitions or explanations given above in general terms or preferred ranges apply to the final products and, accordingly, to the starting materials and intermediates. These radical definitions can be combined with one another as desired, i.e. including combinations between the general definitions and / or the respective preferred categories and / or embodiments.

[0019] All of the embodiments and preferred embodiments disclosed in this specification can be combined as desired and are considered to be within the scope of the present invention.

[0020] As used herein, the term "PA" refers to polyamide. The term "PA* / PA**" refers to a copolymer of PA* and PA**.

[0021] The following description of polyamides relates to the first aspect of the invention.

[0022] According to a first aspect of the present invention, there is provided a polyamide composition comprising at least one polyamide, hollow glass bubbles, and an impact modifier, wherein the at least one polyamide is selected from a polyamide having a repeat unit (I) and a polyamide having a repeat unit (II): [ka] In the formula, R 1 are the same or different and are divalent hydrocarbon groups having 8 to 40 carbon atoms, preferably 8 to 19 carbon atoms, and more preferably 8 to 12 carbon atoms, R 2 are the same or different and are divalent hydrocarbon groups having 4 to 40 carbon atoms, preferably 4 to 24 carbon atoms, more preferably 4 to 18 carbon atoms, and most preferably 8 to 16 carbon atoms, for example, 4, 6, 8, 9, 10, 11, 12, 13 and / or 14 carbon atoms; R 3 are the same or different and are divalent hydrocarbon groups having 7 to 38 carbon atoms, preferably 7 to 36 carbon atoms, more preferably 8 to 36 carbon atoms, even more preferably 8 to 20 and 34 carbon atoms, and most preferably 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18 and / or 34 carbon atoms.

[0023] R 1 , R 2 or R 3 Each of the divalent hydrocarbon groups is preferably an alkylene group and / or a cycloalkylene group, more preferably an alkylene group.

[0024] The polyamide in the first aspect of the present invention can typically be derived from at least one aliphatic monomer selected from the group consisting of (a) a lactam having 9 or more carbon atoms, (b) an amino acid having 9 or more carbon atoms, (c) an aliphatic dicarboxylic acid having 9 to 40 carbon atoms and an aliphatic diamine having 4 to 40 carbon atoms, and (d) a dicarboxylic acid chloride having 9 to 40 carbon atoms and an aliphatic diamine having 4 to 40 carbon atoms.

[0025] The lactam having 9 or more carbon atoms preferably has 9 to 20 carbon atoms, more preferably 9, 10, 11, 12 or 13 carbon atoms. The lactam having 9 or more carbon atoms may be any of laurolactam, undecanolactam, decanolactam, and mixtures thereof.

[0026] The amino acid having 9 or more carbon atoms preferably has 9 to 20 carbon atoms, more preferably 9, 10, 11, 12 or 13 carbon atoms. The amino acid having 9 or more carbon atoms may be any of 9-aminononanoic acid, 10-aminodecanoic acid, 11-aminoundecanoic acid, 12-aminododecanoic acid, and mixtures thereof.

[0027] The aliphatic dicarboxylic acid having 9 to 40 carbon atoms preferably has 9 to 20 and 36 carbon atoms, more preferably 9, 10, 11, 12, 13, 14, 15, 16, 17, 18 and / or 36 carbon atoms. The aliphatic dicarboxylic acid having 9 to 40 carbon atoms may be any of azelaic acid, sebacic acid, undecanedioic acid, dodecanedioic acid, tridecanedioic acid, tetradecanedioic acid, pentadecanoic acid, hexadecanedioic acid, octadecanedioic acid, dimer acid having 36 carbon atoms, and mixtures thereof.

[0028] The aliphatic diamine having 4 to 40 carbon atoms preferably has 4 to 24 carbon atoms, more preferably has 4 to 18 carbon atoms, and most preferably has 4, 6, 8, 9, 10, 11, 12, 13, and 14 carbon atoms. The aliphatic diamine having 4 to 40 carbon atoms may be a straight chain aliphatic diamine or a branched chain aliphatic diamine, and is preferably 1,4-diaminobutane, 1,5-diaminopentane, 1,6-diaminohexane, 1,7-diaminoheptane, 1,8-diamino-octane, 1,9-diaminononane, 1,10-diaminodecane, 1,11-diaminoundecane, 1,12-diaminododecane, 1,13-tridecanediamine, 1,14-tetradecanediamine, 1,15-tetradecanediamine, 1,16-tridecanediamine, 1,17-tetradecanediamine, 1,18-tetradecanediamine, 1,19-tetradecanediamine, 1,20-tridecanediamine, 1,21-tridecanediamine, 1,22-tridecanediamine, 1,23-tridecanediamine, 1,24-tridecanediamine, 1,25-tridecanediamine, 1,26-tridecanediamine, 1,27-tridecanediamine, 1,28-tridecanediamine, 1,29-tridecanediamine, 1,30-tridecanediamine, 1,31-tridecanediamine, 1,32-tridecanediamine, 1,33-tridecanediamine, 1,34-tridecanediamine, 1,35-tridecanediamine, 1,36-tridecanediamine, 1,37- Toradecanediamine, 1,16-hexadecanediamine, 1,18-octadecanediamine, 1,20-eicosanediamine, 1,22-docosanediamine, 2-methyl-1,5-pentanediamine, 3-methyl-1,5-pentanediamine, 1,6-diamino-2,5-dimethylhexane, 1,6-diamino-2,4-dimethylhexane, 1,6-diamino-3,3-dimethylhexane, 1,6-diamino-2,2-dimethylhexane , 2,2,4-trimethylhexane-1,6-diamine, 2,4,4-trimethylhexane-1,6-diamine, 2,3-dimethylheptane-1,7-diamine, 2,4-dimethylheptane-1,7-diamine, 2,5-dimethylheptane-1,7-diamine, 2,2-dimethylheptane-1,7-diamine, 2-methyl-1,8-octanediamine, 1,3-dimethyloctane-1,8-diamine, 1,4-dimethyloctane-1,8 dimethyloctane-1,8-diamine, 2,4-dimethyloctane-1,8-diamine, 3,4-dimethyloctane-1,8-diamine, 4,5-dimethyloctane-1,8-diamine, 2,2-dimethyloctane-1,8-diamine, 3,3-dimethyloctane-1,8-diamine, 4,4-dimethyloctane-1,8-diamine, 2,4-diethylhexane-1,6-diamine, 5-methylnonane-1,9-diamine, and mixtures thereof.

[0029] The aliphatic dicarboxylic acid chloride having 9 to 40 carbon atoms preferably has 9 to 20 carbon atoms, more preferably 9, 10, 11, 12, 13, 14, 15, 16, 17, or 18 carbon atoms. The dicarboxylic acid chloride having 9 to 40 carbon atoms may be any of azelayl chloride, sebacoyl chloride, undecandioyl dichloride, and mixtures thereof.

[0030] The polyamide having a repeating unit of the formula (I) and the polyamide having a repeating unit of the formula (II) are preferably PA9, PA10, PA11, PA12, PA13, PA6.9, PA4.10, PA5.10, PA5.13, PA5.15, PA6.10, PA6.12, PA6.14, PA6.18, PA8.8, PA8.10, PA8.12, PA10.10, PA10.12, PA10.14, PA10.18, PA1 and may be at least one selected from the group consisting of PA4,10, PA5,10, PA6,10, PA6,12, PA6,18, PA10,10, PA10,12, PA12,10, PA12,12, PA11 and / or PA12.

[0031] Additionally, the polyamide according to the first aspect of the present invention may comprise a blend of at least one polyamide and / or polyamide copolymer as described above.

[0032] The polyamide copolymer according to the first aspect of the present invention is a polyamide copolymer comprising at least one repeat unit (repeat unit A) of either formula (I) or formula (II), and at least one repeat unit (repeat unit B) of either formula (I) other than repeat unit A, formula (II) other than repeat unit A, formula (III) and / or formula (IV). Formula (III) or formula (IV) has the following structure: [ka] [In the formula, R 4 are the same or different and are divalent hydrocarbon groups having 2 to 7 carbon atoms, preferably 3 to 5 carbon atoms, R 5 are the same or different and are divalent hydrocarbon groups having 2 to 8 carbon atoms, preferably 2 to 6 carbon atoms, R 6 are the same or different and are divalent hydrocarbon groups having 1 to 6 carbon atoms. has.

[0033] R 4 , R 5 or R 6 Each of the divalent hydrocarbon groups is preferably an alkylene group and / or a cycloalkylene group, more preferably an alkylene group.

[0034] Polyamides comprising repeating units of formula (III) may typically be derived from at least one aliphatic monomer selected from the group consisting of (e) lactams having 3 to 8 carbon atoms, (f) amino acids having 3 to 8 carbon atoms.

[0035] The lactam having 3 to 8 carbon atoms preferably has 3 to 6 carbon atoms and may preferably be any of β-lactam, caprolactam, heptanelactam, capryllactam, and mixtures thereof.

[0036] The amino acid having 3 to 8 carbon atoms may preferably have 4 to 6 carbon atoms, and is preferably 5-amino-propanoic acid.

[0037] Polyamides containing a repeating unit of formula (IV) may typically be derived from at least one aliphatic monomer selected from the group consisting of (g) an aliphatic dicarboxylic acid having 3 to 8 carbon atoms and an aliphatic diamine having 2 to 8 carbon atoms, and (h) an aliphatic dicarboxylic acid chloride having 3 to 8 carbon atoms and an aliphatic diamine having 2 to 8 carbon atoms.

[0038] The aliphatic dicarboxylic acid having 3 to 8 carbon atoms may be any of malonic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, and mixtures thereof.

[0039] Aliphatic diamines having 2 to 8 carbon atoms include 1,2-diaminoethane, 1,2-diaminopropane, propylene-1,3-diamine, 1,3-diaminobutane, 1,4-diaminobutane, 1,5-diaminopentane, 1,4-diamino-1,1-dimethylbutane, 1,4-diamino-1-ethylbutane, 1,4-diamino-1,2-dimethylbutane, 1,4-diamino-1,3-dimethylbutane, 1,4-diamino-1,4- dimethylbutane, 1,4-diamino-2,3-dimethylbutane, 1,2-diamino-1-butylethane, 1,6-diaminohexane, 1,7-diaminoheptane, 1,8-diamino-octane, 1,6-diamino-2,5-dimethylhexane, 1,6-diamino-2,4-dimethylhexane, 1,6-diamino-3,3-dimethylhexane, 1,6-diamino-2,2-dimethylhexane, and mixtures thereof.

[0040] The aliphatic dicarboxylic acid chloride having 3 to 8 carbon atoms may be any of maloamide, succinimide, glutaryl chloride, adipoyl chloride, pimeloyl chloride, suberoyl chloride, and mixtures thereof.

[0041] Examples of repeating units B may be PA6, PA4,6, PA6,6. Examples of copolyamides may be PA6 / PA6,36, PA6,6 / PA4,10, PA6,6 / PA6,10, PA6 / PA6,10, PA6,6 / PA6,12, PA6 / PA6,12.

[0042] There is no limitation on the type of copolymer, which may be a block copolymer, a random copolymer, a graft copolymer, or an alternating copolymer.

[0043] The polyamide according to the first aspect of the present invention may have a molecular weight conventional in polyamide compositions, and the relative viscosity of the polyamide is preferably from 1.8 to 4.0, measured in a 96% by weight sulfuric acid solution at 25°C according to ISO 1628.

[0044] The polyamide composition according to the first aspect of the present invention is preferably present in an amount of 55 to 85 mass %, more preferably 60 to 80 mass %, most preferably 70 to 75 mass %, based on the total mass of the polyamide composition.

[0045] The following description of polyamides relates to the second aspect of the invention.

[0046] According to a second aspect of the present invention, there is provided a polyamide composition comprising at least two polyamides, hollow glass bubbles, and an impact modifier, wherein one of the at least two polyamides has repeat units of formula (V) and another of the at least two polyamides has constitutional units of formula (VI) or formula (VII), wherein formulas (V) and (VI) have the following structure: [ka] [In the formula, R 7 are the same or different and are divalent hydrocarbon groups having 4 to 6 carbon atoms, preferably 5 to 6 carbon atoms, R 8 are the same or different and are divalent hydrocarbon groups having 7 to 10 carbon atoms, preferably 8 to 10 carbon atoms, R 9 are the same or different and are divalent hydrocarbon groups having 10 to 39 carbon atoms, preferably 10 to 24 carbon atoms, more preferably 10 to 18 carbon atoms, and most preferably 10, 11, 12, 13 and / or 14 carbon atoms, R 10 are the same or different and are divalent hydrocarbon groups having 6 to 40 carbon atoms, preferably 6 to 24 carbon atoms, more preferably 6 to 18 carbon atoms, and most preferably 6, 9, 10, 11, 12, 13 and / or 14 carbon atoms, R 11 are the same or different and are divalent hydrocarbon groups having 8 to 38 carbon atoms, preferably 8 to 20 and 24 carbon atoms, more preferably 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18 and / or 34 carbon atoms, and the total number of carbon atoms in formula (VII) is more than 18. has.

[0047] R 7 , R 8 , R 9 , R 10 , or R 11 Each of the divalent hydrocarbon groups is preferably an alkylene group and / or a cycloalkylene group, more preferably an alkylene group.

[0048] Polyamides containing repeating units of formula (V) may typically be derived from at least one aliphatic monomer selected from the group consisting of (i) an aliphatic dicarboxylic acid having 9 to 12 carbon atoms and an aliphatic diamine having 4 to 6 carbon atoms, and (j) an aliphatic dicarboxylic acid chloride having 9 to 12 carbon atoms and an aliphatic diamine having 4 to 6 carbon atoms.

[0049] The aliphatic dicarboxylic acid having 9 to 12 carbon atoms may be any of azelaic acid, sebacic acid, dodecanedioic acid, and mixtures thereof.

[0050] The aliphatic dicarboxylic acid chloride having 9 to 12 carbon atoms may be azelayl chloride, sebacoyl chloride, or a mixture thereof.

[0051] The aliphatic diamine having 4 to 6 carbon atoms may be 1,3-diaminobutane, 1,4-diaminobutane, 1,5-diaminopentane, 1,4-diamino-1,1,-dimenthylbutane, 1,4-diamino-1-ethylbutane, 1,4-diamino-1,2-dimethylbutane, 1,4-diamino-1,3-dimethylbutane, 1,4-diamino-1,4-dimethylbutane, 1,4-diamino-2,3-dimethylbutane, 1,2-diamino-1-butylethane, 1,6-diaminohexane.

[0052] Examples of polyamides comprising repeating units of formula (V) may be PA4,10, PA5,10, PA6,10, PA6,9, PA6,12 and mixtures thereof, preferably PA5,10, PA6,10, PA6,12 and mixtures thereof.

[0053] Polyamides comprising repeating units of formula (VI) may typically be derived from at least one aliphatic monomer selected from the group consisting of (k) lactams having 11 to 40 carbon atoms, (l) amino acids having 11 to 40 carbon atoms.

[0054] The lactam having 11 to 40 carbon atoms preferably has 11 to 20 carbon atoms and may preferably be any of undecanolactam, laurolactam, and mixtures thereof.

[0055] The amino acid having 11 to 40 carbon atoms preferably has 11 to 20 carbon atoms, and may preferably be any of 11-aminoundecanoic acid, 12-aminododecanoic acid, and mixtures thereof.

[0056] Polyamides containing a repeating unit of formula (VII) may typically be derived from at least one aliphatic monomer selected from the group consisting of (m) an aliphatic dicarboxylic acid having 10 to 40 carbon atoms and an aliphatic diamine having 6 to 40 carbon atoms, and (n) an aliphatic dicarboxylic acid chloride having 10 to 40 carbon atoms and an aliphatic diamine having 6 to 40 carbon atoms.

[0057] The aliphatic dicarboxylic acid having 10 to 40 carbon atoms preferably has 10 to 22 and 36 carbon atoms, more preferably 10, 11, 12, 13, 14, 15, 16, 17, 18 and / or 36 carbon atoms. The aliphatic dicarboxylic acid having 10 to 40 carbon atoms may be any of sebacic acid, undecanedioic acid, dodecanedioic acid, tridecanedioic acid, tetradecanedioic acid, pentadecanoic acid, hexadecanedioic acid, octadecanedioic acid, dimer acid having 36 carbon atoms, and mixtures thereof.

[0058] The aliphatic diamine having 6 to 40 carbon atoms preferably has 6 to 24 carbon atoms, more preferably has 6 to 18 carbon atoms, and most preferably has 6, 9, 10, 11, 12, 13, and 14 carbon atoms. The aliphatic diamine having 6 to 40 carbon atoms may be a straight chain aliphatic diamine or a branched chain aliphatic diamine, and is preferably 1,6-diaminohexane, 1,9-diaminononane, 1,10-diaminodecane, 1,11-diaminoundecane, 1,12-diaminododecane, 1,13-tridecanediamine, 1,14-tetradecanediamine, 1,16-hexadecanediamine, 1,18-octadecanediamine, 1,20-eicosanediamine, 1,22-docosanediamine, 2,2,4-trimethylhexane-1,6-diamine, 2,4,4-trimethylhexane-1,6 dimethyloctane-1,8-diamine, 2-methyl-1,8-octanediamine, 1,3-dimethyloctane-1,8-diamine, 1,4-dimethyloctane-1,8-diamine, 2,4-dimethyloctane-1,8-diamine, 3,4-dimethyloctane-1,8-diamine, 4,5-dimethyloctane-1,8-diamine, 2,2-dimethyloctane-1,8-diamine, 3,3-dimethyloctane-1,8-diamine, 4,4-dimethyloctane-1,8-diamine, 2,4-diethylhexane-1,6-diamine, 5-methylnonane-1,9-diamine, and mixtures thereof.

[0059] The aliphatic dicarboxylic acid chloride having 10 to 40 carbon atoms preferably has 10 to 20 carbon atoms, more preferably 10, 11, 12, 13, 14, 15, 16, 17, or 18 carbon atoms. The dicarboxylic acid chloride having 10 to 40 carbon atoms may be any of sebacoyl chloride, undecandioyl dichloride, and a mixture thereof.

[0060] Examples of polyamides having repeating units of formula (VI) or formula (VII) may be PA11, PA12, PA13, PA10,10, PA10,12, PA12,12, PA6,36 and mixtures thereof, preferably PA10,12, PA10,10, and PA12,12, and mixtures thereof.

[0061] Furthermore, the polyamide according to the second aspect of the present invention may comprise a pre-polyamide copolymer. The type of copolymer is not limited, for example, a block copolymer, a random copolymer, a graft copolymer, an alternating copolymer.

[0062] Examples of copolymers of polyamides having formula (V) are PA6,6 / PA4,10, PA6,6 / PA6,10, PA6 / PA6,10, PA6,6 / PA6,12, PA6 / PA6,12. An example of a copolymer of polyamides having formula (VII) is PA6,6 / PA6,36.

[0063] The at least two polyamides according to the second aspect of the present invention may independently have molecular weights conventional in the polyamide composition, and the relative viscosity of the polyamides is preferably from 1.8 to 4.0, measured in a 96% by weight solution of sulfuric acid at 25°C according to ISO 1628.

[0064] The polyamide having a repeating unit of formula (V) and the polyamide having a repeating unit of formula (VI) or formula (VII) are preferably in a mass ratio of 1.5:1 to 4.5:1, more preferably 2:1 to 4:1.

[0065] The combination of at least two polyamide compositions according to the second aspect of the present invention is preferably in an amount of 55-85% by mass, more preferably 60-80% by mass, most preferably 70-75% by mass, based on the total mass of the polyamide compositions.

[0066] The hollow glass bubbles in the present invention have the same meaning as "hollow glass microspheres", "hollow glass beads", "glass microbubbles" or "glass balloons". According to the present invention, the hollow glass bubbles have a core and shell structure, and the core is hollow and filled with gas at atmospheric pressure or reduced pressure. The shell is mainly made of glass containing silicon dioxide (SiO2) as a main component and sodium oxide (Na2O), magnesium oxide (MgO), calcium oxide (CaO), boron oxide (B2O5), phosphorus oxide (P2O5), etc. as secondary components.

[0067] In accordance with the present invention, the hollow glass bubbles preferably have a 10% by volume hydrostatic collapse strength of 8000 PSI (55 MPa) or more, more preferably 10000 PSI (69 MPa) or more, and most preferably 16000 PSI (110 MPa) or more, where the 10% by volume hydrostatic collapse strength of hollow glass microspheres is defined by ASTM D-3102-78, where a suitable amount of glass bubbles is placed in glycerin and pressurized, and the pressure is the pressure at which 10% by volume is crushed.

[0068] Furthermore, regarding the size of the hollow glass bubbles, the median diameter (volume % diameter) is preferably 10 μm to 70 μm, more preferably 10 μm to 35 μm. Furthermore, the 90 volume % diameter is preferably controlled in the range of 30 μm to 200 μm, more preferably 30 μm to 70 μm. The size of the hollow glass bubbles can be measured using a commercially available laser diffraction particle size distribution measuring device (wet type, circulation type).

[0069] Furthermore, the true density of hollow glass bubbles is the mass of a sample of hollow glass bubbles measured by a gas hydrometer divided by the true volume of the mass of the hollow glass bubbles. The true density of hollow glass bubbles in the present invention is preferably 0.9 g / cm 3 or less, more preferably 0.3 to 0.7 g / cm 3 , and even more preferably 0.4 to 0.6 g / cm 3 The true density of hollow glass bubbles is typically measured using ASTM D2840-69 "Average True Particle Density of Hollow Microspheres."

[0070] In accordance with the present invention, the hollow glass bubbles may be surface treated with coupling agents, such as zirconates, silanes, or titanates, urethanes, and / or epoxides. Exemplary titanate and zirconate coupling agents are known to those skilled in the art, and a detailed overview of the applications and selection criteria for these materials can be found in Monte, SJ, Kenrich Petrochemicals, Inc., "Ken-React® Reference Manual - Titanate, Zirconate and Aluminate Coupling agents", Third Revised Edition, March, 1995. Suitable silanes bond to the glass surface through a condensation reaction, forming siloxane bonds with the siliceous glass. This treatment makes the microspheres more wettable or promotes the adhesion of materials to the surface of the glass bubbles. This provides a mechanism for providing covalent, ionic, or dipole bonds between the hollow glass bubbles and the organic matrix.

[0071] The silane coupling agent in the present invention may be a silane coupling agent conventionally used for polyamide resins, and is preferably at least one selected from the group consisting of epoxy functional silanes, urethane functional silanes, and aminoureido functional silanes, more preferably at least one selected from the group consisting of epoxycyclohexyl functional silanes, glycidoxy functional silanes, isocyanate functional silanes, and aminoureido functional silanes, and most preferably 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane, 3-glycidoxypropylmethyldimethoxysilane, 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropylmethyldiethoxysilane, 3-glycidoxypropyltriethoxysilane, N-2-(aminoethyl)-3-aminopropylmethyldimethoxysilane, N-2-(aminoethyl)-3-aminopropyltrimethoxysilane, N -2-(aminoethyl)-3-aminopropylmethyldimethoxysilane, N-2-(aminoethyl)-3-aminopropyltributoxysilane, N-2-(aminoethyl)-3-aminopropylmethyldiethoxysilane, N-2-(aminoethyl)-3-aminopropyltriethoxysilane, 3-aminopropyltrimethoxysilane, 3-aminopropylmethyldiethoxysilane, 3-aminopropylmethyldimethoxysilane, 3-aminopropyldimethylmethoxysilane, 3-aminopropyldimethylethoxysilane, 3-aminopropyltriethoxysilane, 3-triethoxysilyl-N-(1,3-dimethylbutylidene)propylamine, N-phenyl-3-aminopropyltrimethoxysilane, N-(vinylbenzyl)-2-aminoethyl-3-aminopropyltrimethoxysilane hydrochloride, 3-ureidopropyltrialkoxysilane and 3-isocyanatopropyltriethoxysilane.

[0072] The hollow glass bubbles are preferably surface-treated with 0.5 to 3 mass % of a coupling agent, based on the mass of the hollow glass bubbles.

[0073] The hollow glass bubbles treated with a coupling agent can be applied to the surfaces of the hollow glass bubbles using conventional methods, such as spraying, dipping, or mixing, with spraying being preferred, so long as the coupling agent is present on the surfaces of the pure hollow glass bubbles.

[0074] Commercially available hollow glass bubbles that can be used are, for example, 3M® Glass Bubbles. The grade of product that can be used is S60HS (true density 0.6 g / cm 3 , 10% volume isostatic collapse strength 18,000 PSI or more (124 MPa or more)), iM30K (true density 0.6 g / cm 3 , 10% volume hydrostatic collapse strength 27,000 PSI or more (186 MPa or more), S60 (true density 0.6 g / cm 3 , 10% volume isostatic collapse strength 10,000 PSI or more (69 MPa), K42HS (true density 0.42 g / cm 3 , 10 volume % hydrostatic collapse strength of 8000 PSI or more (55 MPa or more).

[0075] The amount of hollow glass bubbles in the polyamide composition is preferably 5 to 30 mass %, more preferably 10 to 25 mass %, and most preferably 15 to 20 mass %, based on the total mass of the polyamide composition.

[0076] Generally, any type of impact modifier can be used in the polyamide composition of the present invention, provided no adverse effects occur.

[0077] In a preferred embodiment, ethylene-based and styrene-based elastomers can be used as impact modifiers. Ethylene-based elastomers include, but are not limited to, elastomers derived from ethylene-α-olefin, elastomers made of ethylene-α-olefin-diene, elastomers made of ethylenically unsaturated carboxylic acids, elastomers made of ethylenically unsaturated carboxylic esters, elastomers made of ethylene-unsaturated carboxylic acids-unsaturated carboxylic esters, and elastomers made of ethylene-α-olefin-unsaturated carboxylic acids-unsaturated carboxylic esters. Styrenic elastomers include, but are not limited to, styrene-isobutylene / styrene-hydrogenated polyolefins, styrene-ethylene-butadiene-styrene copolymers (abbreviated as SEBS), and styrene-butadiene-styrene copolymers. Graft-modified materials of the above elastomers may be used.

[0078] Examples of α-olefins are propylene, 1-butylene, isobutene, 1-pentene, 1-hexene, 1-octene, 4-methyl-1-pentene, 3-methyl-1-pentene, 3,5,5-trimethyl-1-hexene, 1-decene and mixtures thereof, more preferably propylene, 1-butene, 1-hexene, isobutene, 1-octene, a mixture of propylene and 1-butene, and a mixture of 1-decene and 1-methyl-1-pentene, and most preferably 1-butene, isobutene, 1-propylene, 1-pentene, 1-octene.

[0079] The ethylene-α-olefin elastomer is preferably an ethylene-butene copolymer, an ethylene-propylene copolymer, an ethylene-pentene copolymer, an ethylene-isobutene copolymer, and / or an ethylene-octene copolymer.

[0080] The diene is preferably a conjugated diene, more preferably 1,3-butadiene, 1,3-pentadiene, isoprene, 1,3-hexadiene and mixtures thereof, more preferably 1,3-butadiene, 1,3-pentadiene and / or isoprene, and most preferably 1,3-butadiene.

[0081] The unsaturated carboxylic acid has at least one carbon-carbon double bond and at least one carboxyl group. Examples of the ethylenically unsaturated carboxylic acid include monoolefinic acid, polyolefinically unsaturated monocarboxylic acid, polycarboxylic acid (di-, tricarboxylic acid), and preferably, acrylic acid, methacrylic acid, maleic acid, fumaric acid, glutaconic acid, itaconic acid, citraconic acid, 2-ethylacrylic acid, 2-chloroacrylic acid, crotonic acid, isocrotonic acid, angelic acid, sorbic acid, mesaconic acid, cinnamic acid, p-chlorocinnamic acid, 3,4,5,6-tetrahydrophthalic acid, 1,2,3,6-tetrahydrophthalic acid, bicyclo (2.2.2)-Oct-5-ene-2,3-dicarboxylic acid, 4-methylcyclohex-4-ene-1,2-dicarboxylic acid, 1,2,3,4,5,8,9,10-Octahydronaphthalene-2,3-dicarboxylic acid, bicyclo(2.2.1)oct-7-ene-2,3,5,6-tetracarboxylic acid, maleopimaric acid and 7-oxabicyclo(2.2.1)hept-5-ene-2,3-dicarboxylic acid, more preferably acrylic acid, methacrylic acid, maleic acid, fumaric acid and / or citraconic acid.

[0082] The ester of an ethylenically unsaturated carboxylic acid is preferably an ester of acrylic acid and / or acetic acid, more preferably an alkyl ester and / or a hydroxyalkyl ester of acrylic acid and / or acetic acid, such as a C1-C18, more preferably a C1-C12, most preferably a C1-C4 alkyl ester and / or a C1-C18, more preferably a C1-C12, most preferably a C1-C4 hydroxyalkyl ester of acrylic acid and / or acetic acid. Examples of esters of ethylenically unsaturated carboxylic acids include methyl methacrylate, methyl acrylate, ethyl methacrylate, ethyl acrylate, propyl acrylate, propyl methacrylate, butyl acrylate, butyl methacrylate, isobutyl acrylate, isobutyl methacrylate, 2-ethylhexyl acrylate, octyl acrylate, octyl methacrylate, decyl acrylate, decyl methacrylate, isodecyl acrylate, isodecyl methacrylate, lauryl acrylate, lauryl methacrylate, dimethyl maleate, monomethyl maleate, hydroxymethyl methacrylate, methyl methacrylate, ethyl meth ...methacrylate, propyl methacrylate, propyl methacrylate, propyl methacrylate, propyl methacrylate, propyl methacrylate, propyl methacrylate, propyl methacrylate, propyl methacrylate, propyl methacrylate, propyl methacrylate, propyl methacrylate, propyl methacrylate, Examples of the acrylates include dimethyl methacrylate (HEMA), stearyl methacrylate, stearyl acrylate, isobornyl acrylate, isobornyl methacrylate, hydroxypropyl methacrylate, and vinyl acetate, more preferably methyl methacrylate, methyl acrylate, ethyl methacrylate, ethyl acrylate, propyl acrylate, propyl methacrylate, butyl acrylate, butyl methacrylate, isobutyl acrylate, and / or isobutyl methacrylate, and most preferably methyl methacrylate, methyl acrylate, butyl acrylate, and / or butyl methacrylate.

[0083] In accordance with a first aspect of the invention, a combination of grafted and non-grafted impact modifiers, both selected from ethylenic and styrenic elastomers, when used with polyamides and hollow glass bubbles, can significantly improve impact properties, including elongation, and provide an excellent balance of stiffness and toughness at reduced density.

[0084] According to the first aspect of the present invention, the impact modifier comprises at least a non-grafted impact modifier selected from an ethylene-based elastomer and a grafted impact modifier. The grafted impact modifier refers to the impact modifier to which a reactive group has been grafted. The reactive group includes, but is not limited to, a carboxyl group, an acid anhydride group, an epoxy group, a sulfonic acid group, or an acid chloride group. Preferably, the reactive group is a carboxyl, an acid anhydride, and an epoxy group, more preferably, the reactive group is an epoxy group and an anhydride of maleic acid, itaconic acid, and citraconic acid, and most preferably, the reactive group is an anhydride of maleic acid.

[0085] The graft ratio of the grafted impact modifier is about 0.2 to 3 mass %, preferably about 0.5 to 2 mass %, based on the total mass of the grafted impact modifier.

[0086] The acid anhydride is preferably maleic anhydride (MAH), acrylic anhydride, methacrylic anhydride, 4-methylcyclohex-4-ene-1,2-dicarboxylic anhydride, itaconic anhydride, citraconic anhydride, fumaric anhydride, 3,4,5,6-tetrahydrophthalic anhydride, 1,2,3,6-tetrahydrophthalic anhydride, bicyclo(2.2.2)oct-5-ene-2,3-dicarboxylic anhydride, 1,2,3,4,5,8,9,10-octahydronaphthalene-2,3-dicarboxylic anhydride. bicyclo(2.2.1)hept-5-ene-2,3-dicarboxylic anhydride, tonaborn-5-ene-2,3-dicarboxylic anhydride, nadic anhydride, methylnadic anhydride, humic anhydride, methylhumic anhydride and x-methylbicyclo(2.2.1)hept-5-ene-2,3-dicarboxylic anhydride (XMNA), more preferably maleic anhydride, (meth)acrylic anhydride, fumaric anhydride, itaconic anhydride and / or citraconic anhydride.

[0087] The epoxy group may be a glycidyl ester of a carboxylic acid, a glycidyl ether, etc. Examples of the epoxy group are glycidyl acrylate, glycidyl methacrylate, 1-glycidyl ester of maleic acid, diglycidyl ester of maleic acid, monoglycidyl ester of itaconic acid, diglycidyl ester of itaconic acid, monoglycidyl ester of citraconic acid, diglycidyl ester of citraconic acid, monoglycidyl ester of butene tricarboxylic acid, diglycidyl ester of butene tricarboxylic acid, triglycidyl ester of butene tricarboxylic acid, vinyl glycidyl ether, allyl glycidyl ether, 2-methylallyl glycidyl ether, phenyl glycidyl ether, 4-vinylbenzyl glycidyl ether, preferably glycidyl acrylate and / or glycidyl methacrylate.

[0088] According to the first aspect of the present invention, the total amount of the non-grafted impact modifier and the grafted impact modifier in the polyamide composition is preferably 3-20% by weight, more preferably 5-15% by weight, based on the total weight of the polyamide composition. The mass ratio of the non-grafted impact modifier to the grafted impact modifier is preferably 1:3-3:1, more preferably 1:2-2:1, most preferably 1.5:1-1:1.5, for example in the range of 0.9:1.1-1.1:0.9.

[0089] In a preferred embodiment of the first aspect of the present invention, the impact modifier comprises a non-grafted styrenic elastomer and a grafted styrenic elastomer. The grafted reactive groups of the grafted styrenic elastomer are preferably anhydride and / or epoxy.

[0090] In a preferred embodiment of the first aspect of the present invention, the impact modifier comprises a non-grafted ethylenic elastomer and a grafted ethylenic elastomer. The grafted reactive groups of the grafted ethylenic elastomer are preferably anhydride and / or epoxy.

[0091] In a particular embodiment of the first aspect of the present invention, the impact modifier comprises a combination of SEBS and maleic anhydride grafted SEBS (abbreviated as SEBS-g-MAH). The weight ratio of SEBS to maleic anhydride grafted SEBS is preferably 1:2 to 2:1, more preferably 1.5:1 to 1:1.5.

[0092] According to the second aspect of the present invention, it is surprisingly found that a combination of at least two polyamides having repeating units of formula (V) and formula (VI) / (VII) can significantly improve impact resistance, including elongation, and achieve a good balance of stiffness and toughness while reducing density when used together with hollow glass bubbles and an impact modifier selected from an ethylene-based elastomer and a styrene-based elastomer. There is no particular limitation on the impact modifier, which may be a grafted impact modifier, a non-grafted impact modifier, or both. The combination of the grafted impact modifier and the non-grafted impact modifier can also be applied to this embodiment.

[0093] According to the second aspect of the present invention, any kind of impact modifier can be used in the polyamide composition of the present invention. The impact modifier may be selected from the group consisting of ethylene-based elastomers, grafted ethylene-based elastomers, styrene-based elastomers, grafted ethylene-based elastomers, and mixtures thereof.

[0094] In a preferred embodiment of the second aspect of the invention, the impact modifier may be a grafted ethylenic and / or grafted styrenic elastomer, the grafted reactive groups of the grafted ethylenic or styrenic elastomer being preferably an acid anhydride and / or an epoxy, the acid anhydride being maleic anhydride and / or (meth)acrylic anhydride, and the epoxy being preferably glycidyl acrylate and / or glycidyl methacrylate.

[0095] The ethylenic elastomer may be selected from the group consisting of elastomers derived from ethylene-α-olefins, elastomers consisting of ethylene-α-olefin-diene, elastomers consisting of ethylenically unsaturated carboxylic acids, elastomers consisting of ethylenically unsaturated carboxylic esters, elastomers consisting of ethylene-unsaturated carboxylic acids-unsaturated carboxylic esters, and elastomers consisting of ethylene-α-olefin-unsaturated carboxylic acids-unsaturated carboxylic esters. The styrene-based elastomers include, but are not limited to, styrene-isobutylene / styrene-hydrogenated polyolefins, styrene-ethylene-butadiene-styrene copolymers, and styrene-butadiene-styrene copolymers.

[0096] In a particular embodiment of the second aspect of the invention, the impact modifier is an anhydride-grafted ethylenic elastomer, the anhydride being preferably maleic anhydride and / or (meth)acrylic anhydride.

[0097] In certain embodiments of the second aspect of the invention, the impact modifier is a glycidyl methacrylate grafted ethylenic elastomer.

[0098] In certain embodiments of the second aspect of the invention, the impact modifier is maleic anhydride or glycidyl methacrylate grafted ethylene-octene copolymer.

[0099] In a particular embodiment of the second aspect of the invention, the impact modifier is an anhydride-grafted styrenic elastomer, the anhydride being preferably maleic anhydride and / or glycidyl methacrylate.

[0100] In certain embodiments of the second aspect of the invention, the impact modifier is a maleic anhydride grafted styrene-ethylene-butadiene-styrene copolymer.

[0101] In a particular embodiment of the second aspect of the present invention, the impact modifier is a combination of grafted and non-grafted impact modifiers, the weight ratio of the grafted impact modifier to the non-grafted impact modifier being 3:1 to 1:3, preferably 2:1 to 1:2, more preferably 1.5:1 to 1:1.5.

[0102] In a particular embodiment of the second aspect of the present invention, the impact modifier is a combination of a grafted impact modifier and a non-grafted impact modifier, the non-grafted impact modifier being an ethylene-based elastomer or / or a styrene-based elastomer, and the grafted impact modifier being an ethylene-based or / or a styrene-based elastomer grafted with anhydride or epoxy, preferably a combination of anhydride-grafted ethylene-α-olefin copolymer and an ethylene-α-olefin copolymer, or a combination of anhydride-grafted styrene-based elastomer and a styrene-based elastomer. The weight ratio of the grafted impact modifier to the non-grafted impact modifier is 3:1 to 1:3, preferably 2:1 to 1:2, more preferably 1.5:1 to 1:1.5.

[0103] In a particular embodiment of the second aspect of the present invention, the impact modifier is an anhydride grafted ethylene-octene copolymer and a combination of an anhydride grafted SEBS and SEBS. The anhydride is preferably maleic anhydride. The weight ratio of the grafted impact modifier to the non-grafted impact modifier is 3:1 to 1:3, preferably 2:1 to 1:2, more preferably 1.5:1 to 1:1.5.

[0104] According to the second aspect of the present invention, the total amount of impact modifier is preferably from 3 to 20% by weight, more preferably from 5 to 15% by weight, most preferably from 5 to 10% by weight, based on the total weight of the polyamide composition.

[0105] The polyamide composition of the present invention may also contain various additives, so long as the additives do not adversely affect the desired properties of the polyamide composition of the present invention. Preferably, the polyamide composition of the present invention does not contain glass fibers.

[0106] The additives may include surface effect additives, antioxidants, colorants, heat stabilizers, light stabilizers, flow control agents, plasticizers, release agents, flame retardants, anti-drip agents, radiation stabilizers, UV absorbers, UV stabilizers, release agents, and / or antimicrobial agents.

[0107] The heat stabilizer may be a conventional heat stabilizer, such as a copper heat stabilizer and / or an organic amine heat stabilizer, such as Irganox 1098.

[0108] The light stabilizer may be a conventional light stabilizer, such as a hindered amine compound, benzophenone, benzotriazole and / or salicylate light stabilizer.Preferred light stabilizers may be 2-hydroxy-4-n-octoxybenzophenone, 2-(2-hydroxy-5-methylphenyl)benzotriazole, arylsalicylate, and / or 2-(2-hydroxy-5-tert-octylphenyl)benzotriazole, etc.

[0109] The lubricant may be a conventional lubricant for polyamide compositions, such as stearic acid, polyethylene wax, ethylene bisstearamide (EBS), fatty acid esters, waxes, phthalates, and / or silicones.

[0110] The flame retardant may be a conventional flame retardant, such as an inorganic flame retardant and / or an organic flame retardant. The organic flame retardant may include a phosphorus-based flame retardant, a bromine-based flame retardant, a chlorine-based flame retardant, and / or a nitrogen-based flame retardant. An example of a nitrogen flame retardant is selected from the group consisting of benzoguanamine, tris(hydroxyethyl)isocyanurate, isocyanurate, melamine, and melamine cyanurate.

[0111] Examples of phosphorus-based flame retardants are selected from the group consisting of ethylenediamine phosphate, piperazine phosphate, piperazine pyrophosphate, and dialkyl phosphate.

[0112] The total content of the additives in the polyamide composition is preferably 0 to 10 mass %, more preferably 0.5 to 5 mass %, and most preferably 0.5 to 2 mass %, based on the total mass of the polyamide composition.

[0113] Additionally, the present invention discloses a method for making the polyamide composition, which comprises combining all of the components of the polyamide composition.

[0114] In a preferred embodiment, the combining may be extrusion or melt kneading. A preferred extrusion process is to feed all of the components of the polyamide composition, except for the hollow glass bubbles, into the main throat of a screw extruder, and the hollow glass bubbles are fed downstream through a mineral throat into the screw extruder and extruded.

[0115] The present invention also discloses the use of the polyamide composition in lightweight parts, especially for automobiles.

[0116] The present invention discloses articles made from or producible from the polyamide compositions of the present invention.

[0117] The described polyamide compositions are incorporated into articles as part of mobile electronic devices or automotive parts, which may be lightweight.

[0118] As used herein, mobile electronic devices refer to electronic devices that can be easily carried by users and used in various places. Mobile electronic devices may be, but are not limited to, mobile computers, such as tablet computers, laptop computers, calculators, portable media players, mobile internet devices (MIDs), portable PCs, portable game consoles, digital media players, mobile phones, such as smartphones, phablets, wearable computers, such as smart watches, head-mounted displays, virtual reality headsets, digital cameras, global positioning system receivers, portable power sources, portable Wi-Fi, portable media players, calculators, and e-book readers. The parts herein are parts that at least partially comprise a polyamide composition.

[0119] In some embodiments, the component may be a frame, a housing, a connector, a cover, or a circuit board of a mobile electronic device.

[0120] As used herein, automotive parts are interior and exterior parts of automobiles, such as hoods, trunks, bumpers, grills, side cladding, rocker panels, fenders, tailgates, wire and cable applications, instrument panels, consoles, interior trim, exterior trim, door panels, heater housings, battery supports, headlight housings, front ends, ventilator wheels, reservoirs, soft pads.

[0121] In some embodiments, the automotive parts may be interior trim, consoles, and exterior trim.

[0122] The present invention has the following advantages: the polyamide composition has low density, which meets the requirements of lightweight plastic parts for the automotive field and mobile electronics; meanwhile, the polyamide composition can balance low density with good mechanical properties.

[0123] In the present invention, all of the above-mentioned technical features can be freely combined to form preferred embodiments.

[0124] Specific embodiments of the present invention are: Particular embodiment 1 comprises, based on the total weight of the polyamide composition: a) 55 to 85% by mass of at least one polyamide selected from the group consisting of polyamides having a repeating unit of formula (I) and polyamides having a repeating unit of formula (II) [ka] b) Hollow glass bubbles: 5-30% by mass c) 3 to 20% by weight of a combination of grafted and non-grafted impact modifiers, and d) Additives 0 to 10% by mass The polyamide composition comprises:

[0125] Particular embodiment 2 comprises, based on the total weight of the polyamide composition: a) 55 to 85% by mass of at least one polyamide selected from the group consisting of polyamides having a repeating unit of formula (I) and polyamides having a repeating unit of formula (II) [ka] [In the formula, R 1 are independently the same or different and are alkylene groups having 8 to 19 carbon atoms, R 2 are independently the same or different and are alkylene groups having 4 to 24 carbon atoms, R 3 are independently the same or different and are alkylene groups having 8 to 36 carbon atoms. b) Hollow glass bubbles: 5-30% by mass c) 3 to 20% by weight of a combination of grafted and non-grafted impact modifiers, and d) Additives 0 to 10% by mass The polyamide composition comprises:

[0126] Particular embodiment 3 comprises, based on the total weight of the polyamide composition: a) 55 to 85% by mass of at least one polyamide selected from the group consisting of polyamides having a repeating unit of formula (I) and polyamides having a repeating unit of formula (II) [ka] [In the formula, R 1 are independently the same or different and are alkylene groups having 8 to 12 carbon atoms, R 2 are independently the same or different and are alkylene groups having 4 to 18 carbon atoms, R 3 are independently the same or different and are alkylene groups having 8 to 20 and 34 carbon atoms. b) Hollow glass bubbles: 5-30% by mass c) 3 to 20% by weight of a combination of grafted and non-grafted impact modifiers, and d) Additives 0 to 10% by mass The polyamide composition comprises:

[0127] Particular embodiment 4 comprises, based on the total weight of the polyamide composition: a) 60 to 80% by mass of at least one polyamide selected from the group consisting of polyamides having a repeating unit of formula (I) and polyamides having a repeating unit of formula (II) [ka] b) Hollow glass bubbles 10-25% by mass c) 3 to 20% by weight of a combination of grafted and non-grafted impact modifiers, and d) Additives 0 to 10% by mass The polyamide composition comprises:

[0128] Particular embodiment 5 comprises, based on the total weight of the polyamide composition: a) 60 to 80% by mass of at least one polyamide selected from the group consisting of polyamides having a repeating unit of formula (I) and polyamides having a repeating unit of formula (II) [ka] [In the formula, R 1 are independently the same or different and are alkylene groups having 8 to 19 carbon atoms, R 2 are independently the same or different and are alkylene groups having 4 to 24 carbon atoms, R 3 are independently the same or different and are alkylene groups having 8 to 36 carbon atoms. b) Hollow glass bubbles 10-25% by mass c) 3 to 20% by weight of a combination of grafted and non-grafted impact modifiers, and d) Additives 0 to 10% by mass The polyamide composition comprises:

[0129] Particular embodiment 6 comprises, based on the total weight of the polyamide composition: a) 60 to 80% by mass of at least one polyamide selected from the group consisting of polyamides having a repeating unit of formula (I) and polyamides having a repeating unit of formula (II) [ka] [In the formula, R 1 are independently the same or different and are alkylene groups having 8 to 12 carbon atoms, R 2 are independently the same or different and are alkylene groups having 4 to 18 carbon atoms, R 3 are independently the same or different and are alkylene groups having 8 to 20 and 34 carbon atoms. b) Hollow glass bubbles 10-25% by mass c) 3 to 20% by weight of a combination of grafted and non-grafted impact modifiers, and d) Additives 0 to 10% by mass The polyamide composition comprises:

[0130] Particular embodiment 7 comprises, based on the total weight of the polyamide composition: a) 55 to 85% by mass of at least one polyamide selected from the group consisting of polyamides having a repeating unit of formula (I) and polyamides having a repeating unit of formula (II) [ka] b) Hollow glass bubbles: 5-30% by mass c) 3 to 20% by weight of a combination of a grafted impact modifier and a non-grafted impact modifier, where the non-grafted impact modifier is selected from an ethylene-based elastomer and a styrene-based elastomer, and the grafted impact modifier is selected from a grafted ethylene-based elastomer and a styrene-based elastomer, and d) Additives 0 to 10% by mass The polyamide composition comprises:

[0131] Particular embodiment 8 comprises, based on the total weight of the polyamide composition: a) 55 to 85% by mass of at least one polyamide selected from the group consisting of polyamides having a repeating unit of formula (I) and polyamides having a repeating unit of formula (II) [ka] b) Hollow glass bubbles: 5-30% by mass c) 3 to 20% by weight of a combination of a grafted impact modifier and a non-grafted impact modifier, where the non-grafted impact modifier is selected from an ethylene-based elastomer and a styrene-based elastomer, the grafted impact modifier is selected from a grafted ethylene-based elastomer and a styrene-based elastomer, and the grafting reactive group of the grafted impact modifier is a carboxyl group, an acid anhydride group, an epoxy group, a sulfonic acid group, or an acid chloride group; and d) Additives 0 to 10% by mass The polyamide composition comprises:

[0132] Particular embodiment 9 comprises, based on the total weight of the polyamide composition: a) 55 to 85% by mass of at least one polyamide selected from the group consisting of polyamides having a repeating unit of formula (I) and polyamides having a repeating unit of formula (II) [ka] b) Hollow glass bubbles: 5-30% by mass c) 3-20% by weight of a combination of a grafted impact modifier and a non-grafted impact modifier, where the non-grafted impact modifier is selected from an ethylene-based elastomer and a styrene-based elastomer, the grafted impact modifier is selected from a grafted ethylene-based elastomer and a styrene-based elastomer, the grafting reactive group of the grafted impact modifier is a carboxyl group, an acid anhydride group, an epoxy group, a sulfonic acid group or an acid chloride group, and the weight ratio of the non-grafted impact modifier to the grafted impact modifier is 1:3-3:1, preferably 2:1-1:2, more preferably 1.5:1-1:1.5; and d) Additives 0 to 10% by mass The polyamide composition comprises:

[0133] Particular embodiment 10 comprises, based on the total weight of the polyamide composition: a) 55 to 85% by mass of at least one polyamide selected from the group consisting of polyamides having a repeating unit of formula (I) and polyamides having a repeating unit of formula (II) [ka] [In the formula, R 1 are independently the same or different and are alkylene groups having 8 to 19 carbon atoms, R 2 are independently the same or different and are alkylene groups having 4 to 24 carbon atoms, R 3 are independently the same or different and are alkylene groups having 8 to 36 carbon atoms. b) Hollow glass bubbles: 5-30% by mass c) 3-20% by weight of a combination of a grafted impact modifier and a non-grafted impact modifier, where the non-grafted impact modifier is selected from an ethylene-based elastomer and a styrene-based elastomer, the grafted impact modifier is selected from a grafted ethylene-based elastomer and a styrene-based elastomer, the grafting reactive group of the grafted impact modifier is a carboxyl group, an acid anhydride group, an epoxy group, a sulfonic acid group or an acid chloride group, and the weight ratio of the non-grafted impact modifier to the grafted impact modifier is 1:3-3:1, preferably 2:1-1:2, more preferably 1.5:1-1:1.5; and d) Additives 0 to 10% by mass The polyamide composition comprises:

[0134] Particular embodiment 11 comprises, based on the total weight of the polyamide composition: a) 55 to 85% by mass of at least one polyamide selected from the group consisting of polyamides having a repeating unit of formula (I) and polyamides having a repeating unit of formula (II) [ka] [In the formula, R 1 are independently the same or different and are alkylene groups having 8 to 12 carbon atoms, R 2 are independently the same or different and are alkylene groups having 4 to 18 carbon atoms, R 3 are independently the same or different and are alkylene groups having 8 to 20 and 34 carbon atoms. b) Hollow glass bubbles: 5-30% by mass c) 3-20% by weight of a combination of a grafted impact modifier and a non-grafted impact modifier, where the non-grafted impact modifier is selected from an ethylene-based elastomer and a styrene-based elastomer, the grafted impact modifier is selected from a grafted ethylene-based elastomer and a styrene-based elastomer, the grafting reactive group of the grafted impact modifier is a carboxyl group, an acid anhydride group, an epoxy group, a sulfonic acid group or an acid chloride group, and the weight ratio of the non-grafted impact modifier to the grafted impact modifier is 1:3-3:1, preferably 2:1-1:2, more preferably 1.5:1-1:1.5; and d) Additives 0 to 10% by mass The polyamide composition comprises:

[0135] Particular embodiment 12 comprises, based on the total weight of the polyamide composition: a) 60 to 80% by mass of at least one polyamide selected from the group consisting of polyamides having a repeating unit of formula (I) and polyamides having a repeating unit of formula (II) [ka] b) Hollow glass bubbles 10-25% by mass c) 3 to 20% by weight of a combination of a grafted impact modifier and a non-grafted impact modifier, where the non-grafted impact modifier is selected from an ethylene-based elastomer and a styrene-based elastomer, and the grafted impact modifier is selected from a grafted ethylene-based elastomer and a styrene-based elastomer, and d) Additives 0 to 10% by mass The polyamide composition comprises:

[0136] Particular embodiment 13 comprises, based on the total weight of the polyamide composition: a) 60 to 80% by mass of at least one polyamide selected from the group consisting of polyamides having a repeating unit of formula (I) and polyamides having a repeating unit of formula (II) [ka] b) Hollow glass bubbles 10-25% by mass c) 3 to 20% by weight of a combination of a grafted impact modifier and a non-grafted impact modifier, where the non-grafted impact modifier is selected from an ethylene-based elastomer and a styrene-based elastomer, the grafted impact modifier is selected from a grafted ethylene-based elastomer and a styrene-based elastomer, and the grafting reactive group of the grafted impact modifier is a carboxyl group, an acid anhydride group, an epoxy group, a sulfonic acid group, or an acid chloride group; and d) Additives 0 to 10% by mass The polyamide composition comprises:

[0137] Particular embodiment 14 comprises, based on the total weight of the polyamide composition: a) 60 to 80% by mass of at least one polyamide selected from the group consisting of polyamides having a repeating unit of formula (I) and polyamides having a repeating unit of formula (II) [ka] b) Hollow glass bubbles 10-25% by mass c) 3-20% by weight of a combination of a grafted impact modifier and a non-grafted impact modifier, where the non-grafted impact modifier is selected from an ethylene-based elastomer and a styrene-based elastomer, the grafted impact modifier is selected from a grafted ethylene-based elastomer and a styrene-based elastomer, the grafting reactive group of the grafted impact modifier is a carboxyl group, an acid anhydride group, an epoxy group, a sulfonic acid group or an acid chloride group, and the weight ratio of the non-grafted impact modifier to the grafted impact modifier is 1:3-3:1, preferably 2:1-1:2, more preferably 1.5:1-1:1.5; and d) Additives 0 to 10% by mass The polyamide composition comprises:

[0138] Particular embodiment 15 comprises, based on the total weight of the polyamide composition: a) 60 to 80% by mass of at least one polyamide selected from the group consisting of polyamides having a repeating unit of formula (I) and polyamides having a repeating unit of formula (II) [ka] [In the formula, R 1 are independently the same or different and are alkylene groups having 8 to 19 carbon atoms, R 2 are independently the same or different and are alkylene groups having 4 to 24 carbon atoms, R 3 are independently the same or different and are alkylene groups having 8 to 36 carbon atoms. b) Hollow glass bubbles 10-25% by mass c) 3 to 20% by weight of a combination of a grafted impact modifier and a non-grafted impact modifier, where the non-grafted impact modifier is selected from an ethylene-based elastomer and a styrene-based elastomer, and the grafted impact modifier is selected from a grafted ethylene-based elastomer and a styrene-based elastomer, and d) Additives 0 to 10% by mass The polyamide composition comprises:

[0139] Particular embodiment 16 comprises, based on the total weight of the polyamide composition: a) 60 to 80% by mass of at least one polyamide selected from the group consisting of polyamides having a repeating unit of formula (I) and polyamides having a repeating unit of formula (II) [ka] [In the formula, R 1 are independently the same or different and are alkylene groups having 8 to 19 carbon atoms, R 2 are independently the same or different and are alkylene groups having 4 to 24 carbon atoms, R 3 are independently the same or different and are alkylene groups having 8 to 36 carbon atoms. b) Hollow glass bubbles 10-25% by mass c) 3 to 20% by weight of a combination of a grafted impact modifier and a non-grafted impact modifier, where the non-grafted impact modifier is selected from an ethylene-based elastomer and a styrene-based elastomer, the grafted impact modifier is selected from a grafted ethylene-based elastomer and a styrene-based elastomer, and the grafting reactive group of the grafted impact modifier is a carboxyl group, an acid anhydride group, an epoxy group, a sulfonic acid group, or an acid chloride group; and d) Additives 0 to 10% by mass The polyamide composition comprises:

[0140] Particular embodiment 17 comprises, based on the total weight of the polyamide composition: a) 60 to 80% by mass of at least one polyamide selected from the group consisting of polyamides having a repeating unit of formula (I) and polyamides having a repeating unit of formula (II) [ka] [In the formula, R 1 are independently the same or different and are alkylene groups having 8 to 19 carbon atoms, R 2 are independently the same or different and are alkylene groups having 4 to 24 carbon atoms, R 3 are independently the same or different and are alkylene groups having 8 to 36 carbon atoms. b) Hollow glass bubbles 10-25% by mass c) 3-20% by weight of a combination of a grafted impact modifier and a non-grafted impact modifier, where the non-grafted impact modifier is selected from an ethylene-based elastomer and a styrene-based elastomer, the grafted impact modifier is selected from a grafted ethylene-based elastomer and a styrene-based elastomer, the grafting reactive group of the grafted impact modifier is a carboxyl group, an acid anhydride group, an epoxy group, a sulfonic acid group or an acid chloride group, and the weight ratio of the non-grafted impact modifier to the grafted impact modifier is 1:3-3:1, preferably 2:1-1:2, more preferably 1.5:1-1:1.5; and d) Additives 0 to 10% by mass The polyamide composition comprises:

[0141] Particular embodiment 18 comprises, based on the total weight of the polyamide composition: a) 60 to 80% by mass of at least one polyamide selected from the group consisting of polyamides having a repeating unit of formula (I) and polyamides having a repeating unit of formula (II) [ka] [In the formula, R 1 are independently the same or different and are alkylene groups having 8 to 19 carbon atoms, R 2 are independently the same or different and are alkylene groups having 4 to 24 carbon atoms, R 3 are independently the same or different and are alkylene groups having 8 to 36 carbon atoms. b) Hollow glass bubbles 10-25% by mass c) 3 to 20 mass % of a combination of a grafted ethylene-based elastomer and / or a styrene-based elastomer and a non-grafted ethylene-based elastomer and / or a styrene-based elastomer, wherein the grafted reactive group of the grafted ethylene-based elastomer and / or the styrene-based elastomer is a carboxyl group, an acid anhydride group or an epoxy group, and the ethylene-based elastomer is an elastomer composed of ethylene-α-olefin, ethylene-α-olefin-diene, an elastomer composed of an ethylenically unsaturated carboxylic acid, an elastomer composed of an ethylenically unsaturated carboxylic acid ester ... the styrenic elastomer is selected from the group consisting of styrene-isobutylene / styrene-hydrogenated polyolefin, styrene-ethylene-butadiene-styrene copolymer, and styrene-butadiene-styrene copolymer; the mass ratio of the non-grafted impact modifier to the grafted impact modifier is 1:3 to 3:1, preferably 2:1 to 1:2, and more preferably 1.5:1 to 1:1.5; and d) Additives 0 to 10% by mass The polyamide composition comprises:

[0142] Particular embodiment 19 comprises, based on the total weight of the polyamide composition: a) 60 to 80% by mass of at least one polyamide selected from the group consisting of polyamides having a repeating unit of formula (I) and polyamides having a repeating unit of formula (II) [ka] [In the formula, R 1 are independently the same or different and are alkylene groups having 8 to 12 carbon atoms, R 2 are independently the same or different and are alkylene groups having 4 to 18 carbon atoms, R 3 are independently the same or different and are alkylene groups having 8 to 20 and 34 carbon atoms. b) Hollow glass bubbles 10-25% by mass c) 3-20% by weight of a combination of maleic anhydride grafted ethylene-based elastomer and styrene-based elastomer with non-grafted ethylene-based elastomer and / or styrene-based elastomer, where the ethylene-based elastomer is an ethylene-butane copolymer, an ethylene-propylene copolymer, an ethylene-pentane copolymer, an ethylene-isobutene copolymer, and / or an ethylene-octene copolymer, and the styrene-based elastomer is a styrene-ethylene-butadiene-styrene copolymer, a styrene-butadiene-styrene copolymer, and the weight ratio of the non-grafted impact modifier to the grafted impact modifier is 1:3-3:1, preferably 2:1-1:2, more preferably 1.5:1-1:1.5, and d) Additives 0 to 10% by mass The polyamide composition comprises:

[0143] Particular embodiment 20 comprises, based on the total weight of the polyamide composition: a)PA9, PA10, PA11, PA12, PA13, PA6,9, PA4,10, PA5,10, PA5,13, ​​PA5,15, PA6,10, PA6,12, PA6,14 , PA6,18, PA8,8, PA8,10, PA8,12, PA10,10, PA10,12, PA10,14, PA10,18, PA12,10, PA12,12, PA12, 60 to 80% by mass of at least one polyamide selected from PA14, PA12,18, PA13,13, PA14,10, PA14,12, PA14,14, PA14,18, PA6,36, PA6 / PA6,36, PA6,6 / PA4,10, PA6,6 / PA6,10, PA6 / PA6,10, PA6,6 / PA6,12, and / or PA6 / PA6,12 b) 15-20% by mass of hollow glass bubbles surface-treated with epoxide c) 3-20% by weight of a combination of maleic anhydride grafted ethylene-based elastomer and styrene-based elastomer with non-grafted ethylene-based elastomer and / or styrene-based elastomer, where the ethylene-based elastomer is an ethylene-butane copolymer, an ethylene-propylene copolymer, an ethylene-pentane copolymer, an ethylene-isobutene copolymer, and / or an ethylene-octene copolymer, and the styrene-based elastomer is a styrene-ethylene-butadiene-styrene copolymer, a styrene-butadiene-styrene copolymer, and the weight ratio of the non-grafted impact modifier to the grafted impact modifier is 1:3-3:1, preferably 2:1-1:2, more preferably 1.5:1-1:1.5, and d) Additives 0 to 10% by mass The polyamide composition comprises:

[0144] Particular embodiment 21 comprises, based on the total weight of the polyamide composition: a)PA9, PA10, PA11, PA12, PA13, PA6,9, PA4,10, PA5,10, PA5,13, ​​PA5,15, PA6,10, PA6,12, PA6,14 , PA6,18, PA8,8, PA8,10, PA8,12, PA10,10, PA10,12, PA10,14, PA10,18, PA12,10, PA12,12, PA12, 60 to 80% by mass of at least one polyamide selected from PA14, PA12,18, PA13,13, PA14,10, PA14,12, PA14,14, PA14,18, PA6,36, PA6 / PA6,36, PA6,6 / PA4,10, PA6,6 / PA6,10, PA6 / PA6,10, PA6,6 / PA6,12, and / or PA6 / PA6,12 b) 15-20% by mass of hollow glass bubbles surface-treated with epoxide c) 3 to 20% by weight of a combination of maleic anhydride grafted impact modifier and non-grafted impact modifier, where the maleic anhydride grafted impact modifier is maleic anhydride grafted ethylene-isobutene copolymer and / or maleic anhydride grafted styrene-ethylene-butadiene-styrene copolymer, and the non-grafted impact modifier is ethylene-isobutene copolymer and / or styrene-ethylene-butadiene-styrene copolymer, the weight ratio of the non-grafted impact modifier to the grafted impact modifier being 1:3 to 3:1, preferably 2:1 to 1:2, more preferably 1.5:1 to 1:1.5, and d) Additives 0.5 to 5% by mass The polyamide composition comprises:

[0145] Particular embodiment 22 comprises, based on the total weight of the polyamide composition: a) 60 to 80% by mass of at least one polyamide selected from PA12, PA5,10, PA6,10, PA6,12, PA10,10, PA10,12, PA12,12, PA6 / PA6,36, PA6,6 / PA6,10, PA6 / PA6,10, PA6,6 / PA6,12, and / or PA6 / PA6,12 b) 15-20% by mass of hollow glass bubbles surface-treated with epoxide c) 3 to 20% by weight of a combination of maleic anhydride grafted impact modifier and non-grafted impact modifier, where the maleic anhydride grafted impact modifier is maleic anhydride grafted ethylene-isobutene copolymer and / or maleic anhydride grafted styrene-ethylene-butadiene-styrene copolymer, and the non-grafted impact modifier is ethylene-isobutene copolymer and / or styrene-ethylene-butadiene-styrene copolymer, the weight ratio of the non-grafted impact modifier to the grafted impact modifier being 1:3 to 3:1, preferably 2:1 to 1:2, more preferably 1.5:1 to 1:1.5, and d) Additives 0.5 to 5% by mass The polyamide composition comprises:

[0146] Particular embodiment 23 comprises, based on the total weight of the polyamide composition: a) 60 to 80% by mass of at least one polyamide selected from PA6,12, PA6,14, PA6,18, PA8,8, PA8,10, PA8,12, PA10,10, PA10,12, PA10,14, PA10,18, PA12,10, PA12,12, PA12,14, PA12,18, PA13,13, PA14,10, PA14,12, PA14,14, PA14,18, PA6,36, PA6 / PA6,36, PA6,6 / PA4,10, PA6,6 / PA6,10, PA6 / PA6,10, PA6,6 / PA6,12, and / or PA6 / PA6,12 b) 15-20% by mass of hollow glass bubbles surface-treated with epoxide c) 3 to 20% by weight of a combination of maleic anhydride grafted styrene-ethylene-butadiene-styrene copolymer and styrene-ethylene-butadiene-styrene copolymer, where the weight ratio of styrene-ethylene-butadiene-styrene copolymer to maleic anhydride grafted styrene-ethylene-butadiene-styrene copolymer is 1:3 to 3:1, preferably 2:1 to 1:2, more preferably 1.5:1 to 1:1.5, and d) Additives 0.5 to 5% by mass The polyamide composition comprises:

[0147] Particular embodiment 24 comprises, based on the total weight of the polyamide composition: a)PA9, PA10, PA11, PA12, PA13, PA6,9, PA4,10, PA5,10, PA5,13, ​​PA5,15, PA6,10, PA6,12, PA6,14 , PA6,18, PA8,8, PA8,10, PA8,12, PA10,10, PA10,12, PA10,14, PA10,18, PA12,10, PA12,12, PA12, 60 to 80% by mass of at least one polyamide selected from PA14, PA12,18, PA13,13, PA14,10, PA14,12, PA14,14, PA14,18, PA6,36, PA6 / PA6,36, PA6,6 / PA4,10, PA6,6 / PA6,10, PA6 / PA6,10, PA6,6 / PA6,12, and / or PA6 / PA6,12 b) 15-20% by mass of hollow glass bubbles surface-treated with epoxide c) 3 to 20% by weight of a combination of maleic anhydride grafted ethylene-isobutene copolymer and ethylene-isobutene copolymer, where the weight ratio of ethylene-isobutene copolymer to maleic anhydride grafted ethylene-isobutene copolymer is 1:3 to 3:1, preferably 2:1 to 1:2, more preferably 1.5:1 to 1:1.5, and d) Additives 0.5 to 5% by mass The polyamide composition comprises:

[0148] Certain embodiments of the present invention comprise, based on the total weight of the polyamide composition: a) 55 to 85% by weight of a combination of at least two polyamides, where one of the at least two polyamides has a repeat unit of formula (V) and another of the at least two polyamides has a repeat unit of formula (VI) or formula (VII), [ka] [In the formula, R 7 are independently the same or different and are alkylene groups having 4 to 6 carbon atoms, R 8 are independently the same or different and are alkylene groups having 7 to 10 carbon atoms, R 9are independently the same or different and are alkylene groups having 10 to 39 carbon atoms, R 10 are independently the same or different and are alkylene groups having 6 to 40 carbon atoms, R 11 are independently the same or different and are alkylene groups having 8 to 38 carbon atoms, and the total number of carbon atoms in formula (VII) is more than 18. b) Hollow glass bubbles: 5-30% by mass c) 3 to 20% by weight of an impact modifier, and d) Additives 0 to 10% by mass The polyamide composition comprises:

[0149] Particular embodiment 26 comprises, based on the total weight of the polyamide composition: a) 55 to 85% by weight of a combination of at least two polyamides, where one of the at least two polyamides has a repeat unit of formula (V) and another of the at least two polyamides has a repeat unit of formula (VI) or formula (VII), [ka] [In the formula, R 7 are independently the same or different and are alkylene groups having 5 or 6 carbon atoms, R 8 are independently the same or different and are alkylene groups having 8 to 10 carbon atoms, R 9 are independently the same or different and are alkylene groups having 10 to 24 carbon atoms, R 10 are independently the same or different and are alkylene groups having 6 to 24 carbon atoms, R 11 are independently the same or different and are alkylene groups having 8 to 20 and 34 carbon atoms, and the total number of carbon atoms in formula (VII) is more than 18. b) 5 to 30% by mass of hollow glass bubbles surface-treated with epoxide c) 3 to 20% by weight of an impact modifier, and d) Additives 0 to 10% by mass The polyamide composition comprises:

[0150] Particular embodiment 27 comprises, based on the total weight of the polyamide composition: a) 60 to 80% by weight of a combination of at least two polyamides, where one of the at least two polyamides has a repeat unit of formula (V) and another of the at least two polyamides has a repeat unit of formula (VI) or formula (VII), [ka] [In the formula, R 7 are independently the same or different and are alkylene groups having 4 to 6 carbon atoms, R 8 are independently the same or different and are alkylene groups having 7 to 10 carbon atoms, R 9 are independently the same or different and are alkylene groups having 10 to 39 carbon atoms, R 10 are independently the same or different and are alkylene groups having 6 to 40 carbon atoms, R 11 are independently the same or different and are alkylene groups having 8 to 38 carbon atoms, and the total number of carbon atoms in formula (VII) is more than 18. b) Hollow glass bubbles 10-25% by mass c) 3 to 20% by weight of an impact modifier, and d) Additives 0 to 10% by mass The polyamide composition comprises:

[0151] Particular embodiment 28 comprises, based on the total weight of the polyamide composition: a) 60 to 80% by weight of a combination of at least two polyamides, where one of the at least two polyamides has a repeat unit of formula (V) and another of the at least two polyamides has a repeat unit of formula (VI) or formula (VII), [ka] [In the formula, R 7 are independently the same or different and are alkylene groups having 5 or 6 carbon atoms, R 8 are independently the same or different and are alkylene groups having 8 to 10 carbon atoms, R 9 are independently the same or different and are alkylene groups having 10 to 24 carbon atoms, R 10 are independently the same or different and are alkylene groups having 6 to 24 carbon atoms, R 11 are independently the same or different and are alkylene groups having 8 to 20 and 34 carbon atoms, and the total number of carbon atoms in formula (VII) is more than 18. b) 10-25% by mass of hollow glass bubbles surface-treated with epoxide c) 3 to 20% by weight of an impact modifier, and d) Additives 0 to 10% by mass The polyamide composition comprises:

[0152] Particular embodiment 29 comprises, based on the total weight of the polyamide composition: a) 55 to 85% by weight of a combination of at least two polyamides, where one of the at least two polyamides has a repeat unit of formula (V) and another of the at least two polyamides has a repeat unit of formula (VI) or formula (VII), [ka] [In the formula, R 7 are independently the same or different and are alkylene groups having 5 or 6 carbon atoms, R 8 are independently the same or different and are alkylene groups having 8 to 10 carbon atoms, R 9 are independently the same or different and are alkylene groups having 10 to 24 carbon atoms, R 10 are independently the same or different and are alkylene groups having 6 to 24 carbon atoms, R 11 are independently the same or different and are alkylene groups having 8 to 20 and 34 carbon atoms, and the total number of carbon atoms in formula (VII) is more than 18. b) 5 to 30% by mass of hollow glass bubbles surface-treated with epoxide c) 3 to 20% by mass of an impact modifier selected from the group consisting of grafted styrene-based, grafted ethylene-based, ethylene-based and styrene-based elastomers, and d) Additives 0 to 10% by mass The polyamide composition comprises:

[0153] Particular embodiment 30 comprises, based on the total weight of the polyamide composition: a) 60 to 80% by weight of a combination of at least two polyamides, where one of the at least two polyamides has a repeat unit of formula (V) and another of the at least two polyamides has a repeat unit of formula (VI) or formula (VII), [ka] [In the formula, R 7 are independently the same or different and are alkylene groups having 5 or 6 carbon atoms, R 8 are independently the same or different and are alkylene groups having 8 to 10 carbon atoms, R 9 are independently the same or different and are alkylene groups having 10 to 24 carbon atoms, R 10 are independently the same or different and are alkylene groups having 6 to 24 carbon atoms, R 11 are independently the same or different and are alkylene groups having 8 to 20 and 34 carbon atoms, and the total number of carbon atoms in formula (VII) is more than 18. b) 10-25% by mass of hollow glass bubbles surface-treated with epoxide c) 3 to 20% by mass of an impact modifier selected from the group consisting of grafted styrene-based, grafted ethylene-based, ethylene-based and styrene-based elastomers, and d) Additives 0 to 10% by mass The polyamide composition comprises:

[0154] Particular embodiment 31 comprises, based on the total weight of the polyamide composition: a) 55-85% by weight of a combination of at least two polyamides, where one of the at least two polyamides is selected from the group consisting of PA4,10, PA5,10, PA6,10, PA6,9, PA6,12, PA6,6 / PA4,10, PA6,6 / PA6,10, PA6 / PA6,10, PA6,6 / PA6,12, PA6 / PA6,12, and mixtures thereof, and the other one of the at least two polyamides is selected from the group consisting of PA11, PA12, PA13, PA10,10, PA10,12, PA12,12, PA6,36, PA6,6 / PA6,36, and mixtures thereof, b) 5 to 30% by mass of hollow glass bubbles surface-treated with epoxide c) 3 to 20% by weight of an impact modifier, and d) Additives 0 to 10% by mass The polyamide composition comprises:

[0155] Particular embodiment 32 comprises, based on the total weight of the polyamide composition: a) 55-85% by weight of a combination of at least two polyamides, where one of the at least two polyamides is selected from the group consisting of PA4,10, PA5,10, PA6,10, PA6,9, PA6,12, PA6,6 / PA4,10, PA6,6 / PA6,10, PA6 / PA6,10, PA6,6 / PA6,12, PA6 / PA6,12, and mixtures thereof, and the other one of the at least two polyamides is selected from the group consisting of PA11, PA12, PA13, PA10,10, PA10,12, PA12,12, PA6,36, PA6,6 / PA6,36, and mixtures thereof, b) 5 to 30% by mass of hollow glass bubbles surface-treated with epoxide c) 3 to 20% by mass of an impact modifier selected from the group consisting of grafted styrene-based, grafted ethylene-based, ethylene-based and styrene-based elastomers, and d) Additives 0 to 10% by mass The polyamide composition comprises:

[0156] Particular embodiment 33 comprises, based on the total weight of the polyamide composition: a) 55-85% by weight of a combination of at least two polyamides, where one of the at least two polyamides is selected from the group consisting of PA4,10, PA5,10, PA6,10, PA6,9, PA6,12, PA6,6 / PA4,10, PA6,6 / PA6,10, PA6 / PA6,10, PA6,6 / PA6,12, PA6 / PA6,12, and mixtures thereof, and the other one of the at least two polyamides is selected from the group consisting of PA11, PA12, PA13, PA10,10, PA10,12, PA12,12, PA6,36, PA6,6 / PA6,36, and mixtures thereof, b) 5 to 30% by mass of hollow glass bubbles surface-treated with epoxide c) 3 to 20% by mass of an impact resistance modifier which is a grafted styrene-based elastomer and / or a grafted ethylene-based elastomer, wherein the grafted reactive group of the grafted ethylene-based elastomer and / or the styrene-based elastomer is a carboxyl group, an acid anhydride group or an epoxy group, the ethylene-based elastomer is selected from the group consisting of elastomers consisting of ethylene-α-olefin, ethylene-α-olefin-diene, elastomers consisting of ethylenically unsaturated carboxylic acid, elastomers consisting of ethylenically unsaturated carboxylic acid ester, elastomers consisting of ethylenically unsaturated carboxylic acid-unsaturated carboxylic acid ester, and elastomers consisting of ethylene-α-olefin-unsaturated carboxylic acid-unsaturated carboxylic acid ester, the styrene-based elastomer is selected from the group consisting of styrene-isobutylene / styrene-hydrogenated polyolefin, styrene-ethylene-butadiene-styrene copolymer, and styrene-butadiene-styrene copolymer, and d) Additives 0 to 10% by mass The polyamide composition comprises:

[0157] Particular embodiment 34 comprises, based on the total weight of the polyamide composition: a) 55-85% by weight of a combination of at least two polyamides, where one of the at least two polyamides is selected from the group consisting of PA4,10, PA5,10, PA6,10, PA6,9, PA6,12, PA6,6 / PA4,10, PA6,6 / PA6,10, PA6 / PA6,10, PA6,6 / PA6,12, PA6 / PA6,12, and mixtures thereof, and the other one of the at least two polyamides is selected from the group consisting of PA11, PA12, PA13, PA10,10, PA10,12, PA12,12, PA6,36, PA6,6 / PA6,36, and mixtures thereof, b) 5 to 30% by mass of hollow glass bubbles surface-treated with epoxide c) 3 to 20 mass % of an impact modifier selected from the group consisting of maleic anhydride-grafted, (meth)acrylic anhydride-grafted, glycidyl acrylate-grafted, and glycidyl methacrylate-grafted styrene-based elastomers, and maleic anhydride-grafted, (meth)acrylic anhydride-grafted, glycidyl acrylate-grafted, and glycidyl methacrylate-grafted ethylene-based elastomers, and d) Additives 0 to 10% by mass The polyamide composition comprises:

[0158] Particular embodiment 35 comprises, based on the total weight of the polyamide composition: a) 55-85% by weight of a combination of at least two polyamides, where one of the at least two polyamides is selected from the group consisting of PA4,10, PA5,10, PA6,10, PA6,9, PA6,12, PA6,6 / PA4,10, PA6,6 / PA6,10, PA6 / PA6,10, PA6,6 / PA6,12, PA6 / PA6,12, and mixtures thereof, and the other one of the at least two polyamides is selected from the group consisting of PA11, PA12, PA13, PA10,10, PA10,12, PA12,12, PA6,36, PA6,6 / PA6,36, and mixtures thereof, b) 5 to 30% by mass of hollow glass bubbles surface-treated with epoxide c) 3 to 20% by mass of an impact modifier selected from the group consisting of maleic anhydride grafted ethylene-α-olefin, maleic anhydride grafted styrene-isobutylene / styrene-hydrogenated polyolefin, maleic anhydride grafted styrene-ethylene-butadiene-styrene copolymer, and maleic anhydride grafted styrene-butadiene-styrene copolymer, and d) Additives 0 to 10% by mass The polyamide composition comprises:

[0159] Particular embodiment 36 comprises, based on the total weight of the polyamide composition: a) 55-85% by weight of a combination of at least two polyamides, where one of the at least two polyamides is selected from the group consisting of PA4,10, PA5,10, PA6,10, PA6,9, PA6,12, PA6,6 / PA4,10, PA6,6 / PA6,10, PA6 / PA6,10, PA6,6 / PA6,12, PA6 / PA6,12, and mixtures thereof, and the other one of the at least two polyamides is selected from the group consisting of PA11, PA12, PA13, PA10,10, PA10,12, PA12,12, PA6,36, PA6,6 / PA6,36, and mixtures thereof, b) 5 to 30% by mass of hollow glass bubbles surface-treated with epoxide c) 3 to 20% by weight of an impact modifier selected from the group consisting of maleic anhydride grafted ethylene-octene copolymers and / or maleic anhydride grafted styrene-ethylene-butadiene-styrene copolymers, and d) Additives 0 to 10% by mass The polyamide composition comprises:

[0160] Particular embodiment 37 comprises, based on the total weight of the polyamide composition: a) 60-80% by weight of a combination of at least two polyamides, where one of the at least two polyamides is selected from the group consisting of PA4,10, PA5,10, PA6,10, PA6,9, PA6,12, PA6,6 / PA4,10, PA6,6 / PA6,10, PA6 / PA6,10, PA6,6 / PA6,12, PA6 / PA6,12, and mixtures thereof, and the other one of the at least two polyamides is selected from the group consisting of PA11, PA12, PA13, PA10,10, PA10,12, PA12,12, PA6,36, PA6,6 / PA6,36, and mixtures thereof, b) 10-25% by mass of hollow glass bubbles surface-treated with epoxide c) 3 to 20% by mass of an impact resistance modifier which is a grafted styrene-based elastomer and / or a grafted ethylene-based elastomer, wherein the grafted reactive group of the grafted ethylene-based elastomer and / or the styrene-based elastomer is a carboxyl group, an acid anhydride group or an epoxy group, the ethylene-based elastomer is selected from the group consisting of elastomers consisting of ethylene-α-olefin, ethylene-α-olefin-diene, elastomers consisting of ethylenically unsaturated carboxylic acid, elastomers consisting of ethylenically unsaturated carboxylic acid ester, elastomers consisting of ethylenically unsaturated carboxylic acid-unsaturated carboxylic acid ester, and elastomers consisting of ethylene-α-olefin-unsaturated carboxylic acid-unsaturated carboxylic acid ester, the styrene-based elastomer is selected from the group consisting of styrene-isobutylene / styrene-hydrogenated polyolefin, styrene-ethylene-butadiene-styrene copolymer, and styrene-butadiene-styrene copolymer, and d) Additives 0 to 10% by mass The polyamide composition comprises:

[0161] Particular embodiment 38 comprises, based on the total weight of the polyamide composition: a) 60-80% by weight of a combination of at least two polyamides, where one of the at least two polyamides is selected from the group consisting of PA4,10, PA5,10, PA6,10, PA6,9, PA6,12, PA6,6 / PA4,10, PA6,6 / PA6,10, PA6 / PA6,10, PA6,6 / PA6,12, PA6 / PA6,12, and mixtures thereof, and the other one of the at least two polyamides is selected from the group consisting of PA11, PA12, PA13, PA10,10, PA10,12, PA12,12, PA6,36, PA6,6 / PA6,36, and mixtures thereof, b) 10-25% by mass of hollow glass bubbles surface-treated with epoxide c) 3 to 20 mass % of an impact modifier selected from the group consisting of maleic anhydride-grafted, (meth)acrylic anhydride-grafted, glycidyl acrylate-grafted, and glycidyl methacrylate-grafted styrene-based elastomers, and maleic anhydride-grafted, (meth)acrylic anhydride-grafted, glycidyl acrylate-grafted, and glycidyl methacrylate-grafted ethylene-based elastomers, and d) Additives 0 to 10% by mass The polyamide composition comprises:

[0162] Particular embodiment 39 comprises, based on the total weight of the polyamide composition: a) 60-80% by weight of a combination of at least two polyamides, where one of the at least two polyamides is selected from the group consisting of PA4,10, PA5,10, PA6,10, PA6,9, PA6,12, PA6,6 / PA4,10, PA6,6 / PA6,10, PA6 / PA6,10, PA6,6 / PA6,12, PA6 / PA6,12, and mixtures thereof, and the other one of the at least two polyamides is selected from the group consisting of PA11, PA12, PA13, PA10,10, PA10,12, PA12,12, PA6,36, PA6,6 / PA6,36, and mixtures thereof, b) 10-25% by mass of hollow glass bubbles surface-treated with epoxide c) 3 to 20% by mass of an impact modifier selected from the group consisting of maleic anhydride grafted ethylene-α-olefin, maleic anhydride grafted styrene-isobutylene / styrene-hydrogenated polyolefin, maleic anhydride grafted styrene-ethylene-butadiene-styrene copolymer, and maleic anhydride grafted styrene-butadiene-styrene copolymer, and d) Additives 0 to 10% by mass The polyamide composition comprises:

[0163] Particular embodiment 40 comprises, based on the total weight of the polyamide composition: a) 60-80% by weight of a combination of at least two polyamides, where one of the at least two polyamides is selected from the group consisting of PA4,10, PA5,10, PA6,10, PA6,9, PA6,12, PA6,6 / PA4,10, PA6,6 / PA6,10, PA6 / PA6,10, PA6,6 / PA6,12, PA6 / PA6,12, and mixtures thereof, and the other one of the at least two polyamides is selected from the group consisting of PA11, PA12, PA13, PA10,10, PA10,12, PA12,12, PA6,36, PA6,6 / PA6,36, and mixtures thereof, b) 10-25% by mass of hollow glass bubbles surface-treated with epoxide c) 3 to 20% by weight of an impact modifier selected from the group consisting of maleic anhydride grafted ethylene-octene copolymers and / or maleic anhydride grafted styrene-ethylene-butadiene-styrene copolymers, and d) Additives 0.5 to 5% by mass The polyamide composition comprises:

[0164] Particular embodiment 41 comprises, based on the total weight of the polyamide composition: a) 55-85% by weight of a combination of at least two polyamides, where one of the at least two polyamides is selected from the group consisting of PA5,10, PA6,10, PA6,12, PA6,6 / PA6,10, PA6 / PA6,10, PA6,6 / PA6,12, PA6 / PA6,12, and mixtures thereof, and the other one of the at least two polyamides is selected from the group consisting of PA10,10, PA10,12, PA12,12, PA6,36, PA6,6 / PA6,36, and mixtures thereof, b) 5 to 30% by mass of hollow glass bubbles surface-treated with epoxide c) 3 to 20% by weight of an impact modifier selected from the group consisting of maleic anhydride grafted ethylene-octene copolymers and / or maleic anhydride grafted styrene-ethylene-butadiene-styrene copolymers, and d) Additives 0.5 to 5% by mass The polyamide composition comprises:

[0165] Particular embodiment 42 comprises, based on the total weight of the polyamide composition: a) 55 to 85% by weight of a combination of at least two polyamides, where one of the at least two polyamides has a repeat unit of formula (V) and another of the at least two polyamides has a repeat unit of formula (VI) or formula (VII), [ka] [In the formula, R 7 are independently the same or different and are alkylene groups having 5 or 6 carbon atoms, R 8 are independently the same or different and are alkylene groups having 8 to 10 carbon atoms, R 9 are independently the same or different and are alkylene groups having 10 to 24 carbon atoms, R 10 are independently the same or different and are alkylene groups having 6 to 24 carbon atoms, R 11 are independently the same or different and are alkylene groups having 8 to 20 and 34 carbon atoms, and the total number of carbon atoms in formula (VII) is more than 18. b) 5 to 30% by mass of hollow glass bubbles surface-treated with epoxide c) 3 to 20% by weight of an impact modifier, which is a combination of a grafted impact modifier and a non-grafted impact modifier; and d) Additives 0 to 10% by mass The polyamide composition comprises:

[0166] Particular embodiment 43 comprises, based on the total weight of the polyamide composition: a) 55 to 85% by weight of a combination of at least two polyamides, where one of the at least two polyamides has a repeat unit of formula (V) and another of the at least two polyamides has a repeat unit of formula (VI) or formula (VII), [ka] [In the formula, R 7 are independently the same or different and are alkylene groups having 5 or 6 carbon atoms, R 8 are independently the same or different and are alkylene groups having 8 to 10 carbon atoms, R 9 are independently the same or different and are alkylene groups having 10 to 24 carbon atoms, R 10 are independently the same or different and are alkylene groups having 6 to 24 carbon atoms, R11 are independently the same or different and are alkylene groups having 8 to 20 and 34 carbon atoms, and the total number of carbon atoms in formula (VII) is more than 18. b) 5 to 30% by mass of hollow glass bubbles surface-treated with epoxide c) 3 to 20% by mass of an impact modifier which is a combination of a grafted impact modifier and a non-grafted impact modifier, where the non-grafted impact modifier is an ethylene-based and / or styrene-based elastomer, and the grafted impact modifier is an acid anhydride-grafted ethylene-based elastomer, an acid anhydride-grafted ethylene-based elastomer, a glycidyl methacrylate-grafted ethylene-based elastomer, or a glycidyl methacrylate-grafted styrene-based elastomer; and d) Additives 0 to 10% by mass The polyamide composition comprises:

[0167] Particular embodiment 44 comprises, based on the total weight of the polyamide composition: a) 55 to 85% by weight of a combination of at least two polyamides, where one of the at least two polyamides has a repeat unit of formula (V) and another of the at least two polyamides has a repeat unit of formula (VI) or formula (VII), [ka] [In the formula, R 7 are independently the same or different and are alkylene groups having 5 or 6 carbon atoms, R 8 are independently the same or different and are alkylene groups having 8 to 10 carbon atoms, R 9 are independently the same or different and are alkylene groups having 10 to 24 carbon atoms, R 10 are independently the same or different and are alkylene groups having 6 to 24 carbon atoms, R 11are independently the same or different and are alkylene groups having 8 to 20 and 34 carbon atoms, and the total number of carbon atoms in formula (VII) is more than 18. b) 5 to 30% by mass of hollow glass bubbles surface-treated with epoxide c) 3-20% by weight of an impact modifier which is a combination of a grafted impact modifier and a non-grafted impact modifier, where the non-grafted impact modifier is an ethylene-octene copolymer and / or SEBS, the grafted impact modifier is a maleic anhydride grafted ethylene-octene elastomer, a maleic anhydride grafted SEBS elastomer, and the weight ratio of the grafted impact modifier to the non-grafted impact modifier is 1:3-3:1, preferably 2:1-1:2, more preferably 1.5:1-1:1.5; and d) Additives 0 to 10% by mass The polyamide composition comprises:

[0168] Particular embodiment 45 comprises, based on the total weight of the polyamide composition: a) 55-85% by weight of a combination of at least two polyamides, where one of the at least two polyamides has a repeat unit of formula (V) and another of the at least two polyamides has a repeat unit of formula (VI) or formula (VII), and the weight ratio of the polyamide having the repeat unit of formula (V) to the polyamide having the repeat unit of formula (VI) or formula (VII) is 2:1 to 4:1; [ka] [In the formula, R 7 are independently the same or different and are alkylene groups having 4 or 6 carbon atoms, R 8 are independently the same or different and are alkylene groups having 7 to 10 carbon atoms, R 9 are independently the same or different and are alkylene groups having 10 to 39 carbon atoms, R 10are independently the same or different and are alkylene groups having 6 to 40 carbon atoms, R 11 are independently the same or different and are alkylene groups having 8 to 38 carbon atoms, and the total number of carbon atoms in formula (VII) is more than 18. b) 5 to 30% by mass of hollow glass bubbles surface-treated with epoxide c) 3 to 20% by weight of an impact modifier, and d) Additives 0 to 10% by mass The polyamide composition comprises:

[0169] Particular embodiment 46 comprises, based on the total weight of the polyamide composition: a) 60-80% by weight of a combination of at least two polyamides, where one of the at least two polyamides has a repeating unit of formula (V) and another of the at least two polyamides has a repeating unit of formula (VI) or formula (VII), and the weight ratio of the polyamide having the repeating unit of formula (V) to the polyamide having the repeating unit of formula (VI) or formula (VII) is 2:1-4:1; [ka] [In the formula, R 7 are independently the same or different and are alkylene groups having 4 to 6 carbon atoms, R 8 are independently the same or different and are alkylene groups having 7 to 10 carbon atoms, R 9 are independently the same or different and are alkylene groups having 10 to 39 carbon atoms, R 10 are independently the same or different and are alkylene groups having 6 to 40 carbon atoms, R 11 are independently the same or different and are alkylene groups having 8 to 38 carbon atoms, and the total number of carbon atoms in formula (VII) is more than 18. b) Hollow glass bubbles 10-25% by mass c) 3 to 20% by weight of an impact modifier, and d) Additives 0 to 10% by mass The polyamide composition comprises:

[0170] Particular embodiment 47 comprises, based on the total weight of the polyamide composition: a) 60-80% by weight of a combination of at least two polyamides, where one of the at least two polyamides has a repeating unit of formula (V) and another of the at least two polyamides has a repeating unit of formula (VI) or formula (VII), and the weight ratio of the polyamide having the repeating unit of formula (V) to the polyamide having the repeating unit of formula (VI) or formula (VII) is 2:1-4:1; [ka] [In the formula, R 7 are independently the same or different and are alkylene groups having 5 or 6 carbon atoms, R 8 are independently the same or different and are alkylene groups having 8 to 10 carbon atoms, R 9 are independently the same or different and are alkylene groups having 10 to 24 carbon atoms, R 10 are independently the same or different and are alkylene groups having 6 to 24 carbon atoms, R 11 are independently the same or different and are alkylene groups having 8 to 20 and 34 carbon atoms, and the total number of carbon atoms in formula (VII) is more than 18. b) 10-25% by mass of hollow glass bubbles surface-treated with epoxide c) 3 to 20% by weight of an impact modifier, and d) Additives 0 to 10% by mass The polyamide composition comprises:

[0171] Particular embodiment 48 comprises, based on the total weight of the polyamide composition: a) 55-85% by weight of a combination of at least two polyamides, where one of the at least two polyamides has a repeat unit of formula (V) and another of the at least two polyamides has a repeat unit of formula (VI) or formula (VII), and the weight ratio of the polyamide having the repeat unit of formula (V) to the polyamide having the repeat unit of formula (VI) or formula (VII) is 2:1 to 4:1; [ka] [In the formula, R 7 are independently the same or different and are alkylene groups having 5 or 6 carbon atoms, R 8 are independently the same or different and are alkylene groups having 8 to 10 carbon atoms, R 9 are independently the same or different and are alkylene groups having 10 to 24 carbon atoms, R 10 are independently the same or different and are alkylene groups having 6 to 24 carbon atoms, R 11 are independently the same or different and are alkylene groups having 8 to 20 and 34 carbon atoms, and the total number of carbon atoms in formula (VII) is more than 18. b) 5 to 30% by mass of hollow glass bubbles surface-treated with epoxide c) 3 to 20% by mass of an impact modifier selected from the group consisting of grafted styrene-based, grafted ethylene-based, ethylene-based and styrene-based elastomers, and d) Additives 0 to 10% by mass The polyamide composition comprises:

[0172] Particular embodiment 49 comprises, based on the total weight of the polyamide composition: a) 60-80% by weight of a combination of at least two polyamides, where one of the at least two polyamides has a repeating unit of formula (V) and another of the at least two polyamides has a repeating unit of formula (VI) or formula (VII), and the weight ratio of the polyamide having the repeating unit of formula (V) to the polyamide having the repeating unit of formula (VI) or formula (VII) is 2:1-4:1; [ka] [In the formula, R 7 are independently the same or different and are alkylene groups having 5 or 6 carbon atoms, R 8 are independently the same or different and are alkylene groups having 8 to 10 carbon atoms, R 9 are independently the same or different and are alkylene groups having 10 to 24 carbon atoms, R 10 are independently the same or different and are alkylene groups having 6 to 24 carbon atoms, R 11 are independently the same or different and are alkylene groups having 8 to 20 and 34 carbon atoms, and the total number of carbon atoms in formula (VII) is more than 18. b) 10-25% by mass of hollow glass bubbles surface-treated with epoxide c) 3 to 20% by weight of an impact modifier selected from the group of grafted styrene-based, grafted ethylene-based, ethylene-based and styrene-based elastomers, where the weight ratio of the grafted impact modifier to the non-grafted impact modifier is 1:3 to 3:1, preferably 2:1 to 1:2, more preferably 1.5:1 to 1:1.5, and d) Additives 0 to 10% by mass The polyamide composition comprises: EXAMPLES

[0173] The following non-limiting examples illustrate various features and characteristics of the present invention, but should not be construed as limiting the scope of the invention thereto.

[0174] The formulations of the Examples and Comparative Examples are shown in Tables 1 and 2 below, and the specific components used therein are as follows:

[0175] polyamide PA6,10: Type II, manufactured by Shangdong Dongchen New Technology Co. Ltd. PA6,6: Ultramid A27E, manufactured by BASF SE PA6 / 6.36: Ultramid F29, manufactured by BASF SE PA12,12: Shangdong Dongchen New Technology Co. Ltd. PA10,12: Shangdong Dongchen New Technology Co. Ltd. PA9T: GC51010, manufactured by Kuraray.

[0176] Hollow Glass Bubbles Treated iM 16K: Epoxy modified iM 16K, manufactured by 3M Company.

[0177] Non-grafted impact modifiers Kraton G1657: SEBS (styrene:rubber=13 / 87), manufactured by Kraton.

[0178] Grafted Impact Modifiers Kraton FG1901: SEBS-g-MAH (styrene: rubber = 30 / 70), graft ratio = 1.7 mass%, manufactured by Kraton Kraton FG 1924: SEBS-g-MAH (styrene: rubber = 13 / 87), graft ratio = 1 mass%, manufactured by Kraton Fusabond N493: POE-g-MAH, graft ratio = 0.5 mass%, manufactured by Dupont Tafmer MH5020C: POE-g-MAH, graft ratio = 0.67 mass%, manufactured by Mitsui.

[0179] Impact Modifier Kumho HR181: ABS, manufactured by Kumhopetrochemical.

[0180] Glass fiber NEG 3610: Fiberglass ChopVantage HP 3610, manufactured by Nippon Electric Glass.

[0181] Antioxidants Irganox 1098: Manufactured by BASF SE.

[0182] EBS: Lubricant, manufactured by SINWON chemical CO., Ltd. UB624: Colorant, manufactured by BASF SE.

[0183] The extrusion conditions for the following examples are as follows: The raw materials except the hollow glass bubbles are mixed together in a Turbula T50A high speed mixer and fed into a Coperion ZSK26MC twin screw extruder, and the glass bubbles are fed into a downstream side feeder; melt extruded under a temperature of 270°C and pelletized to obtain a pelletized polyamide composition.

[0184] The obtained pellets were dried at 100°C for 6 hours, and then processed with an injection molding machine KM130CX manufactured by Krauss Maffei at a melt temperature of 250°C to 280°C and a clamping force of 130T to obtain test specimens.

[0185] All the components of the polyamide compositions of Examples E1-E10 and Comparative Examples CE1-CE12 are listed in Tables 1 and 2, respectively. The mechanical properties are tested according to the following methods.

[0186] About Spiral Flow The melt flow of the material is also measured by a spiral flow test to provide an indication of the actual injection molding flow performance. For the test, a mold was used with a spiral flow channel emanating from the center with a depth of 2 mm, a width of 5 mm, and a length of 115 cm. The longest distance between any two points on the outermost wall of the channel is 15.0 cm, and the shortest distance between any two points on the outermost wall of the channel is 3.7 cm. The channel has etched notches every centimeter and is numbered every 5 centimeters to identify the distance from the center. The melt to be tested is injected from a sprue in the center of the spiral at 270°C and 500 bar and allowed to flow along the channel of the mold maintained at a temperature of 80°C. The melt flow distance until flow stops is recorded. The longer the flow distance, the better the injection molding melt flow performance.

[0187] Density: ISO 1183 Tensile stress at break, tensile modulus, tensile strain at break: ISO 527, using test specimens of 171 mm x 10 mm x 4 mm (length x width x thickness).

[0188] Flexural modulus: ISO 178 Unnotched Charpy impact strength: ISO179, test piece size 80mm x 10mm x 4mm (length x width x thickness) was used.

[0189] [Table 1]

[0190] [Table 2]

[0191] As can be seen from E1 to E8, with regard to the technical solutions comprising a combination of grafted and non-grafted impact modifiers, said combination, when used with polyamide and hollow glass bubbles, has a viscosity of 0.9 g / cm 3This contributes to obtaining compositions E1 to E8 having a density of less than 100%, a tensile strain at break of more than 15%, and other acceptable mechanical properties.

[0192] Specifically, comparing E2 with CE2~CE5, the only difference is the impact modifier, and E2 obtains a higher tensile strain at break than CE2~CE5, which proves that the combination of non-grafted and grafted impact modifiers adopted in E2 contributes to improving the toughness of the material, while at the same time, other mechanical properties of E2 are comparable to those of CE2~CE5. Furthermore, even though E2 and CE2~CE5 use the same amount of hollow glass bubbles, E2 achieves a lower density than CE2, CE4, and CE5, which also indicates that the selection of impact modifier has the effect of contributing to the reduction of density.

[0193] CE7 employs an impact modifier formulation to obtain high tensile break strain, but does not add hollow glass bubbles, resulting in a density of the resulting material of 1.071 g / cm 3 , which is unacceptable for the intended use of the resulting material. Conversely, CE8 used too many hollow glass bubbles, which resulted in a lack of raw material supply during compounding.

[0194] As can be seen from E1, E5-E7, E9-E10, regarding the technical solutions including the specific combination of PA6,10 and PA10,12, this combination has a density of 0.9 g / cm3 when used together with hollow glass bubbles and impact modifiers. 3 The resulting composition has a tensile strain of less than 20%, a tensile strain at break of more than 20%, and other acceptable mechanical properties.

[0195] As can be seen from E9-E10, even though no specific combination of impact modifiers is employed in E9-E10, the tensile strain at break is increased in both examples, which clearly indicates that the specific combination of PA6,10 and PA10,12 also contributes to improved toughness and other acceptable mechanical properties.

[0196] Comparing E9 and CE4 under the same impact modifier conditions, it is clear that the combination of PA6,10 and PA10,12 in E9 contributes to a better tensile strain at break than CE4, which uses only PA6,10, and other mechanical properties are also acceptable.

Claims

1. A polyamide composition comprising at least one polyamide, hollow glass bubbles, and an impact modifier, wherein the impact modifier comprises a combination of a grafted impact modifier and an ungrafted impact modifier, and wherein at least one polyamide is selected from a polyamide having a repeating unit of formula (I) and a polyamide having a repeating unit of formula (II). A polyamide composition characterized by that. 【Chemical 1】 [wherein, R 1 independently of one another, is the same or different and is a divalent hydrocarbon group having 8 to 40 carbon atoms, preferably an alkylene group or a cycloalkylene group, R 2 independently of one another and identically or differently, is a divalent hydrocarbon group having 4 to 40 carbon atoms, preferably an alkylene group or a cycloalkylene group, R 3 is independently the same as or different from each other and is a divalent hydrocarbon group having 7 to 38 carbon atoms, preferably an alkylene group or a cycloalkylene group]

2. The at least one polyamide is selected from the group consisting of PA9, PA10, PA11, PA12, PA13, PA6,9, PA4,10, PA5,10, PA5,13, PA5,15, PA6,10, PA6,12, PA6,14, PA6,18, PA8,8, PA8,10, PA8,12, PA10,10, PA10,12, PA10,14, PA10,18, PA12,10, PA12,12, PA12,14, PA12,18, PA13,13, PA14,10, PA14,12, PA14,14, PA14,18, PA6,36, PA6 / PA6,36, PA6,6 / PA4,10, PA6,6 / PA6,10, PA6 / PA6,10, PA6,6 / PA6,12, PA6 / PA6,12; more preferably PA4,10, PA5,10, PA6,10, PA6,12, PA6,18, PA10,10, PA10,12, PA12,10, PA12,12, PA11 and / or PA12. The polyamide composition according to claim 1.

3. A polyamide composition comprising a combination of at least two polyamides, hollow glass bubbles, and an impact modifier, wherein one of the at least two polyamides has a repeating unit of formula (V), and the other one of the at least two polyamides has a repeating unit of formula (VI) or formula (VII). A polyamide composition characterized by that. 【Chemical 2】 [wherein, R 7 independently of one another, is the same or different and is a divalent hydrocarbon group having 4 to 6 carbon atoms, preferably an alkylene group or a cycloalkylene group, R 8 is independently the same as or different from each other, and is a divalent hydrocarbon group having 7 to 10 carbon atoms, preferably an alkylene group or a cycloalkylene group, R 9 is independently the same as or different from each other and is a divalent hydrocarbon group having 10 to 39 carbon atoms, preferably an alkylene group or a cycloalkylene group, R 10 is independently the same as or different from each other and is a divalent hydrocarbon group having 6 to 40 carbon atoms, preferably an alkylene group or a cycloalkylene group, R 11 is independently the same as or different from each other and is a divalent hydrocarbon group having 8 to 38 carbon atoms, preferably an alkylene group or a cycloalkylene group, The total number of carbon atoms in formula (VII) is more than 18]

4. The polyamide having the repeating unit of formula (V) is selected from the group consisting of PA4,10, PA5,10, PA6,10, PA6,9, PA6,12, PA6,6 / PA4,10, PA6,6 / PA6,10, PA6 / PA6,10, PA6,6 / PA6,12, PA6 / PA6,12, and mixtures thereof; preferably PA5,10, PA6,10, PA6,12, and mixtures thereof, The polyamide having the repeating unit of the formula (VI) or formula (VII) is selected from the group consisting of PA11, PA12, PA13, PA10,10, PA10,12, PA12,12, PA6,36, PA6,6 / PA6,36, and mixtures thereof, preferably PA10,12, PA10,10, PA12,12, and mixtures thereof. The polyamide composition according to claim 3.

5. The polyamide having the repeating unit of the formula (V) and the polyamide having the repeating unit of the formula (VI) or formula (VII) are in a mass ratio of 1.5:1 to 4.5:1, preferably 2:1 to 4:

1. The polyamide composition according to claim 3 or 4.

6. The polyamide is in an amount of 55 to 85% by mass, preferably 60 to 80% by mass, based on the total mass of the polyamide composition. The polyamide composition according to any one of claims 1 to 4.

7. The hollow glass bubbles have an isotropic pressure collapse strength of 10% by volume or more at 8000 PSI or higher, a median diameter of 10 μm to 70 μm, and a true density of 0.9 g / cm 3 The polyamide composition according to any one of claims 1 to 4, which is as follows.

8. The hollow glass bubbles are surface-treated with a coupling agent selected from zirconate, silane, or titanate, urethane, and / or epoxide. The polyamide composition according to any one of claims 1 to 4.

9. The hollow glass bubbles are in an amount of 5 to 30% by mass, preferably 10 to 25% by mass, based on the total mass of the polyamide composition. The polyamide composition according to any one of claims 1 to 4.

10. The impact modifier is selected from an ethylene-based elastomer and a styrene-based elastomer. The polyamide composition according to any one of claims 1 to 4.

11. The ethylene-based elastomer is selected from an elastomer composed of ethylene-α-olefin, an elastomer composed of ethylene-α-olefin-diene, an elastomer composed of ethylene-unsaturated carboxylic acid, an elastomer composed of ethylene-unsaturated carboxylic acid ester, an elastomer composed of ethylene-unsaturated carboxylic acid-unsaturated carboxylic acid ester, and an elastomer composed of ethylene-α-olefin-unsaturated carboxylic acid-unsaturated carboxylic acid ester, and / or the styrene-based elastomer is selected from styrene-isobutene / styrene-hydrogenated polyolefin, styrene-ethylene-butadiene-styrene copolymer, and styrene-butadiene-styrene copolymer. The polyamide composition according to claim 10.

12. The grafted impact modifier-improved polyamide composition according to claim 1 or 2, wherein the grafted impact modifier is grafted with a reactive group selected from a carboxyl group, an acid anhydride group, an epoxy group, a sulfonic acid group, and an acid chloride group, preferably selected from a carboxyl group and an acid anhydride group, and more preferably selected from maleic anhydride, itaconic anhydride, and citraconic anhydride.

13. The polyamide composition according to any one of claims 1 to 4, wherein the impact modifier is in an amount of 3 to 20% by mass, more preferably 5 to 15% by mass, based on the total mass of the polyamide composition.

14. The polyamide composition according to any one of claims 1 to 4, wherein the impact modifier comprises a combination of a styrene-ethylene-butadiene-styrene copolymer and a maleic anhydride-grafted styrene-ethylene-butadiene-styrene copolymer, or a combination of an ethylene-octene copolymer and a maleic anhydride-grafted ethylene-octene polymer.

15. The polyamide composition according to claim 1 or 2, wherein the mass ratio of the ungrafted impact modifier to the grafted impact modifier is in the range of 1:3 to 3:1, more preferably 1:2 to 2:1, and most preferably 0.9:1.1 to 1.1:0.

9.

16. A method for producing a polyamide composition according to any one of claims 1 to 4, comprising a step of combining all components of the polyamide composition.

17. Use of the polyamide composition according to any one of claims 1 to 4 in lightweight parts, particularly lightweight parts for automotive parts and mobile electronic devices.

18. An article produced from the polyamide composition according to any one of claims 1 to 4.

19. The mobile electronic devices include tablet computers, laptop computers, pocket calculators, portable media players, mobile Internet devices, handheld PCs, handheld game consoles, digital media players, mobile phones, phablets, wearable computers, head-mounted displays, virtual reality headsets, digital cameras, global positioning system receivers, portable power supplies, portable Wi-Fi, portable media players, pocket calculators, and e-book readers, and the automotive parts include bonnets, trunks, bumpers, grilles, side claddings, rocker panels, fenders, tailgates, wire and cable applications, instrument panels, consoles, interior trims, exterior trims, door panels, heater housings, battery supports, headlight housings, front ends, ventilator wheels, reservoirs, and soft pads, the article according to claim 18.

Images