polymer composition

Abstract

The present invention provides a polymer composition containing a propylene polymer and a cured product of a thermosetting resin, which can form a molded article with excellent Young's modulus. [Solution] A polymer composition containing a propylene polymer (A), a compatibilizer having an olefin polymer skeleton (B), and a cured product of a thermosetting resin (C).

Description

[Technical Field]

[0001] This disclosure relates, for example, to polymer compositions. [Background technology]

[0002] It has been common practice to apply coatings to polypropylene molded articles used in automobile parts, home appliance parts, or building materials, etc., for the purpose of adding value such as design, or to extend the lifespan of the articles by improving weather resistance, etc. (see, for example, Patent Document 1). Such coatings are formed from, for example, thermosetting resins. [Prior art documents] [Patent Documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2004-099884 [Overview of the project] [Problems that the invention aims to solve]

[0004] In recent years, from the viewpoint of reducing environmental impact, there has been a demand for recycling polypropylene-based molded articles and articles having coatings. However, the inventors have found that when the above articles are recycled, the resulting polymer composition contains cured thermosetting resins derived from the coatings, resulting in molded articles with a low Young's modulus. The present disclosure aims to provide a polymer composition containing a propylene-based polymer and cured thermosetting resins that can form molded articles with excellent Young's modulus. [Means for solving the problem]

[0005] One embodiment of the polymer composition of the present disclosure contains a propylene polymer (A), a compatibilizer having an olefin polymer skeleton (B), and a cured product of a thermosetting resin (C). [Effects of the Invention]

[0006] In one embodiment, the polymer composition of the present disclosure contains a propylene-based polymer and a cured product of a thermosetting resin, and can form a molded body having excellent Young's modulus.

Mode for Carrying Out the Invention

[0007] In this specification, a numerical range represented by "~" means a range including the numerical values described before and after "~" as the lower limit value and the upper limit value. In this specification, when the units of the numerical values described before and after "~" indicating a numerical range are the same, the unit of the numerical value described before "~" may be omitted.

[0008] In this specification, the term "polymer" may be used without particularly distinguishing between a homopolymer and a copolymer. That is, the term "polymer" is used in a meaning that it may be a homopolymer or a copolymer.

[0009] [Polymer Composition] The polymer composition of the present disclosure (hereinafter also referred to as "the present composition") contains a propylene-based polymer (A), a compatibilizer (B) having an olefin-based polymer skeleton, and a cured product (C) of a thermosetting resin.

[0010] <Propylene-based Polymer (A)> The present composition contains a propylene-based polymer (A). The propylene-based polymer (A) (hereinafter also referred to as "component (A)") is a polymer in which the content ratio of the constituent units derived from propylene in the total amount of the constituent units derived from olefin-based monomers constituting the polymer exceeds 50 mol%. The content ratio of the constituent units derived from propylene in component (A) is preferably 60 mol% or more, more preferably 70 mol% or more, and still more preferably 80 mol% or more. The content ratio of each constituent unit in component (A) is 13 measured by C-NMR.

[0011] Component (A) may be a propylene homopolymer or a copolymer of propylene and a comonomer other than propylene. If component (A) is one of the above copolymers, it may be a random copolymer, a block copolymer, or a graft copolymer.

[0012] The comonomer can be any monomer copolymerizable with propylene, and α-olefins having 2 or 4 to 20 carbon atoms are preferred, with α-olefins having 2 or 4 to 10 carbon atoms being more preferred. Examples of comonomers include ethylene, 1-butene, 1-pentene, 4-methyl-1-pentene, 1-hexene, 1-heptene, 1-octene, 1-nonene, and 1-decene. Among these, at least one selected from the group consisting of ethylene, 1-butene, 1-pentene, 4-methyl-1-pentene, 1-hexene, 1-heptene, and 1-octene is preferred. The copolymer may contain one or more comonomer-derived structural units.

[0013] The copolymer is preferably a propylene-α-olefin copolymer. The content of the α-olefin (excluding propylene)-derived structural units in the copolymer is 0.1 mol% or more and less than 50 mol%, preferably 0.5 to 40 mol%, more preferably 1 to 30 mol%, and even more preferably 1 to 20 mol% of the total amount of olefin monomer-derived structural units constituting the copolymer.

[0014] In the random copolymer, the content of the α-olefin-derived structural units is preferably 0.1 to 20 mol%, more preferably 0.5 to 15 mol%, and even more preferably 1 to 10 mol%, of the total amount of the olefin monomer-derived structural units. In the block copolymer, the content of the α-olefin-derived structural units is preferably 0.5 mol% or more and less than 50 mol%, more preferably 1 to 40 mol%, and even more preferably 5 to 30 mol%, of the total amount of the olefin monomer-derived structural units.

[0015] Component (A) may be a block copolymer having, for example, a propylene homopolymer block and an α-olefin-propylene copolymer block such as an ethylene-propylene copolymer block, from the viewpoint of fluidity, rigidity, and impact resistance. The content of the α-olefin-propylene copolymer block in the block copolymer is preferably 3 to 40% by mass, more preferably 5 to 30% by mass, and even more preferably 8 to 25% by mass, based on the mass of the block copolymer. The content of the α-olefin-propylene copolymer block with respect to the above α-olefin (excluding propylene) is preferably 20 to 70 mol%, more preferably 25 to 60 mol%, and even more preferably 30 to 55 mol%, of the total of the α-olefin-derived and propylene-derived structural units. The above α-olefin is preferably ethylene.

[0016] The structure of component (A) is not particularly limited; for example, the propylene-derived constituent unit may be an isotactic, syndiotactic, or atactic structure, but an isotactic structure is preferred.

[0017] The melt flow rate (MFR) of component (A) is preferably 0.01 to 500 g / 10 min, more preferably 0.1 to 300 g / 10 min, and even more preferably 0.5 to 100 g / 10 min. Component (A) having such an MFR is preferable for obtaining a polymer composition suitable for obtaining molded articles with superior impact resistance and heat resistance. The MFR of component (A) is measured under conditions of 230°C and a 2.16 kg load by a method in accordance with ASTM D1238.

[0018] The density of component (A) is preferably 0.86 to 0.92 g / cm³. 3 , more preferably 0.87~0.92 g / cm³ 3 More preferably 0.88 to 0.91 g / cm³ 3Component (A) having such density is preferred for obtaining a polymer composition suitable for obtaining a molded article with superior impact resistance and heat resistance. The density of component (A) is measured by a method in accordance with ASTM D1505 (density gradient tube method).

[0019] Component (A) may be a crystalline polymer or an amorphous polymer, and is preferably a crystalline polymer. Crystallinity means that a melting point (Tm) is observed in differential scanning calorimetry (DSC). If component (A) is a crystalline polymer, its melting point is preferably 100 to 180°C, more preferably 120 to 170°C, from the viewpoint of heat resistance, etc. The melting point of component (A) is the melting peak temperature measured by the method in accordance with JIS K7121:2012 (DSC, using a test piece conditioned under 3.(2) (cooling rate of 10°C per minute), and measured under the conditions of 8.6(1) (heating rate of 10°C per minute)).

[0020] In this specification, polyolefins such as propylene polymers may be polymers obtained using only fossil fuel-derived olefins such as fossil fuel-derived propylene as raw materials, polymers obtained using only biomass-derived olefins such as biomass-derived propylene as raw materials, or polymers obtained using a mixture of fossil fuel-derived olefins and biomass-derived olefins as raw materials, or mixtures of two or more of these.

[0021] Component (A) may be synthesized by conventionally known methods or may be a commercially available product. The component (A) contained in this composition may be one type or two or more types. The content or blending ratio of component (A) in this composition is preferably 60% by mass or more, more preferably 70% by mass or more, and even more preferably 80% by mass or more, based on the mass of this composition. The upper limit of the content or blending ratio of component (A) is determined by the content or blending ratio of the other components.

[0022] <Compatibilizer (B)> This composition contains a compatibilizer (B) having an olefin polymer skeleton. Compatibilizer (B) (hereinafter also referred to as "component (B)") is, for example, a component that improves the dispersibility or compatibility of a thermosetting resin cured product (C) in a propylene polymer (A). By incorporating compatibilizer (B) in this composition, the dispersibility of the thermosetting resin cured product (C) in the propylene polymer (A), or the compatibility between the propylene polymer (A) and the thermosetting resin cured product (C), can be improved. Therefore, this composition can form a molded article with excellent mechanical properties such as Young's modulus, even while containing a thermosetting resin cured product (C).

[0023] As the olefin polymer skeleton, a skeleton composed of a propylene polymer (described later) and a skeleton composed of an ethylene polymer are preferred, with a skeleton composed of a propylene polymer being more preferred.

[0024] Examples of component (B) include carbodiimide-modified polyolefin compositions and acid-modified polyolefins. Among these, carbodiimide-modified polyolefin compositions are preferred from the viewpoint of having superior mechanical properties in the resulting molded article, and in particular, a better balance between Young's modulus and impact strength.

[0025] The component (B) contained in this composition may be one type or two or more types. The content or blending ratio of component (B) in this composition is preferably 1 to 30% by mass, more preferably 3 to 20% by mass, and even more preferably 5 to 15% by mass, of the total mass of component (A) and component (B). When the content or blending ratio of component (B) is above the lower limit, the above-mentioned effects are exhibited more favorably. When the content or blending ratio of component (B) is below the upper limit, the mechanical properties are superior.

[0026] This composition may also be obtained by further blending a second propylene polymer (A) with a mixture produced by blending a compatibilizer (B), etc., with recycled material, recycled resin, or waste material containing a first propylene polymer (A) and a cured product of a thermosetting resin (C). Here, the first propylene polymer (A) may be the same polymer as the second propylene polymer (A), or it may be a different polymer. In this case, the content or blending ratio of components (B) and cured product (C), etc. in this composition will be lower as a result.

[0027] The content or amount of component (B) in this composition is preferably 20 to 300,000 parts by mass, more preferably 100 to 10,000 parts by mass, and even more preferably 500 to 2,000 parts by mass, per 100 parts by mass of the cured thermosetting resin (C).

[0028] Carbodiimide-modified polyolefin composition The carbodiimide-modified polyolefin composition has a carbodiimide group. The content of carbodiimide groups in the carbodiimide-modified polyolefin composition is preferably 0.1 to 200 mmol / 100g, more preferably 1 to 150 mmol / 100g, even more preferably 3 to 100 mmol / 100g, and particularly preferably 5 to 50 mmol / 100g, from the viewpoint of better dispersibility or compatibility of the cured product (C) of the thermosetting resin and the mechanical properties of the resulting molded article. The content of carbodiimide groups is the amount of carbodiimide groups per 100 grams of the carbodiimide-modified polyolefin composition.

[0029] The carbodiimide group content may be calculated from the amount of raw materials used to form the carbodiimide-modified polyolefin composition, or if such calculation is difficult, 13 The content may be measured by 13C-NMR, IR, or titration. The above content can be determined as the equivalent amount of carbodiimide groups. 13 The concentration was 130-142 ppm in C-NMR and 2130-2140 cm in IR. -1A peak attributed to the carbodiimide group can be observed, and the content of the carbodiimide group can be measured based on this peak.

[0030] 13 The 13C-NMR measurement is performed as follows. 0.35 g of the sample is heated and dissolved in 2.0 mL of hexachlorobutadiene. After filtering the obtained solution with a glass filter (G2), 0.5 mL of deuterated benzene is added to the filtrate, and it is charged into an NMR tube with an inner diameter of 10 mm. Then, using an NMR measuring device, 13 13C-NMR measurement is carried out at 120 °C. The number of integration times is set to 10,000 times or more.

[0031] The IR measurement is performed as follows. After preparing a sheet by thermally pressing the sample at 250 °C for 3 minutes, an infrared absorption spectrum is measured by the transmission method using the sheet and an infrared spectrophotometer. The measurement conditions are a resolution of 2 cm -1 and the number of integration times is set to 32 times.

[0032] The MFR of the carbodiimide-modified polyolefin composition is preferably 0.01 to 500 g / 10 min, more preferably 0.1 to 400 g / 10 min, still more preferably 1 to 300 g / 10 min, even more preferably 1.5 to 150 g / 10 min, and particularly preferably 2 to 50 g / 10 min, from the viewpoint of better dispersibility or compatibility of the cured product (C) of the thermosetting resin. The MFR is measured under the condition of a 2.16 kg load by a method conforming to ASTM D1238. The measurement temperature is 230 °C when the polyolefin, which is the main skeleton of the carbodiimide-modified polyolefin composition, is a propylene-based polymer, and 190 °C when it is an ethylene-based polymer.

[0033] The carbodiimide-modified polyolefin composition preferably contains a reaction product of a polyolefin (B1) having a group that reacts with a carbodiimide group (hereinafter also referred to as "reactive polyolefin (B1)") and a compound (B2) having a carbodiimide group (hereinafter also referred to as "carbodiimide group-containing compound (B2)"). One type of reactive polyolefin (B1) may be used, or two or more types may be used. One type of carbodiimide group-containing compound (B2) may be used, or two or more types may be used.

[0034] The carbodiimide-modified polyolefin composition preferably contains a propylene polymer (B3) from the viewpoint of having superior mechanical properties and the above-mentioned balance in the resulting molded article. Examples of the propylene polymer (B3) include polymers corresponding to the propylene polymer (A) described above. One type of propylene polymer (B3) may be used, or two or more types may be used.

[0035] The carbodiimide-modified polyolefin composition may contain unreacted reactive polyolefin (B1) and unreacted carbodiimide group-containing compound (B2). Each of these unreacted compounds may contain two or more different types.

[0036] (Reactive polyolefin (B1)) Reactive polyolefin (B1) has a group that reacts with a carbodiimide group. The group that reacts with the carbodiimide group in reactive polyolefin (B1) may be one or two or more.

[0037] Examples of reactive polyolefins (B1) include grafted polymers of polyolefins using compounds having a group that reacts with a carbodiimide group (hereinafter also referred to as "compound (b1)"), and copolymers of olefins and compound (b1).

[0038] Examples of groups that react with the carbodiimide group in the reactive polyolefin (B1) and compound (b1) include groups containing active hydrogen that are reactive with the carbodiimide group, specifically carboxyl groups, amino groups, hydroxyl groups, and thiol groups. Groups that react with carbodiimide groups include not only groups containing active hydrogen, but also groups that can be easily converted into groups containing active hydrogen with water, etc. Specifically, these include acid anhydride groups, epoxy groups, and glycidyl groups.

[0039] Examples of compound (b1) include unsaturated carboxylic acids and their derivatives. Examples of derivatives of unsaturated carboxylic acids include acid anhydrides, acid halides, amides, imides, and esters. Examples of unsaturated carboxylic acids include unsaturated compounds having one or more carboxyl groups. Unsaturated compounds have unsaturated groups such as vinyl groups, vinylene groups, and unsaturated cyclic hydrocarbon groups.

[0040] Examples of unsaturated carboxylic acids include dicarboxylic acids such as maleic acid, fumaric acid, itaconic acid, citraconic acid, phthalic acid, tetrahydrophthalic acid, norbornenedicarboxylic acid, and bicyclo[2.2.1]hepto-2-ene-5,6-dicarboxylic acid; and monocarboxylic acids such as (meth)acrylic acid, crotonic acid, and isocrotonic acid. Examples of derivatives of unsaturated carboxylic acids include dicarboxylic acid anhydrides such as maleic anhydride, itaconic anhydride, citraconic anhydride, tetrahydrophthalic anhydride, and bicyclo[2.2.1]hept-2-ene-5,6-dicarboxylic acid anhydride; acid halides such as malenyl chloride; imides such as malenylimide; and esters such as dimethyl maleate, monomethyl maleate, diethyl maleate, diethyl fumarate, dimethyl itaconate, diethyl citraconate, dimethyl tetrahydrophthalate, bicyclo[2.2.1]hept-2-ene-5,6-dicarboxylic acid dimethyl, hydroxyethyl (meth)acrylate, hydroxypropyl (meth)acrylate, glycidyl (meth)acrylate, aminoethyl (meth)acrylate, and aminopropyl (meth)acrylate.

[0041] Among unsaturated carboxylic acids, dicarboxylic acid anhydrides such as maleic anhydride, itaconic anhydride, citraconic anhydride, tetrahydrophthalic anhydride, and bicyclo[2,2,1]hept-2-ene-5,6-dicarboxylic acid anhydride, (meth)acrylic acid, hydroxyethyl (meth)acrylate, glycidyl (meth)acrylate, and aminopropyl (meth)acrylate are preferred, with dicarboxylic acid anhydrides such as maleic anhydride, itaconic anhydride, citraconic anhydride, tetrahydrophthalic anhydride, and bicyclo[2.2.1]hept-2-ene-5,6-dicarboxylic acid anhydride being more preferred.

[0042] As the reactive polyolefin (B1), unsaturated carboxylic acids or polyolefins modified with their acid anhydrides are preferred, dicarboxylic acids or polyolefins modified with their acid anhydrides are more preferred, and maleic acid or maleic anhydride-modified polyolefins are even more preferred. Here, propylene polymers described later are preferred as the polyolefin.

[0043] Compound (b1) may be used alone or in combination of two or more types. The content of the structure (e.g., graft amount) derived from compound (b1) in the reactive polyolefin (B1) is preferably 0.1 to 10% by mass, more preferably 0.1 to 8% by mass, and even more preferably 0.1 to 6% by mass, based on the mass of the reactive polyolefin (B1). Such a reactive polyolefin (B1) can react well with the carbodiimide group-containing compound (B2) to form a carbodiimide-modified polyolefin. The above content percentage is determined by the characteristic peak in the infrared absorption spectrum attributed to the structure derived from compound (b1) (for example, when maleic anhydride is used as compound (b1), an infrared spectrophotometer is used to measure the peak typically at 1780-1790 cm⁻¹). -1 If a peak of the carbonyl group of maleic anhydride is detected nearby, it is measured by IR, 13 C-NMR or 1 It may also be measured by 1H-NMR.

[0044] The MFR of reactive polyolefin (B1) is preferably 0.01 to 500 g / 10 min, more preferably 0.1 to 400 g / 10 min, and even more preferably 0.5 to 300 g / 10 min. The MFR is measured under a 2.16 kg load by a method in accordance with ASTM D1238. The measurement temperature is 230°C if the polyolefin is a propylene-based polymer, and 190°C if it is an ethylene-based polymer.

[0045] The number-average molecular weight (Mn) of reactive polyolefin (B1), as measured by gel permeation chromatography (GPC), is preferably 1,000 to 1,000,000, more preferably 5,000 to 500,000, and even more preferably 10,000 to 100,000. Details of the measurement conditions will be described later.

[0046] The density of the reactive polyolefin (B1) is preferably 0.8 to 1.5 g / cm³. 3 , more preferably 0.8 to 1.3 g / cm³ 3 More preferably 0.8 to 1.1 g / cm³ 3 Particularly preferred is 0.8 to 1.0 g / cm³. 3The density is measured according to the ASTM D1505 (density gradient pipe method).

[0047] By controlling the number-average molecular weight (Mn) of the reactive polyolefin (B1) and the proportion of the structure derived from compound (b1) in (B1), it is possible to suppress crosslinking and the resulting decrease in manufacturing stability during the production of carbodiimide-modified polyolefins. From this viewpoint, it is preferable that the reactive olefin (B1) satisfies the following formula (1). 0.1 <Mn / {(100-M)×f / M}<6 (1) In formula (1), f represents the molecular weight (g / mol) of the compound (b1) used, M represents the percentage (mass%) of the structure derived from compound (b1) in the reactive polyolefin (B1), and Mn represents the number-average molecular weight of the reactive polyolefin (B1).

[0048] The reactive olefin (B1) is more preferably satisfied with the following formula (2), and particularly preferably satisfied with the following formula (3), from the viewpoint of being less prone to crosslinking and having better manufacturing stability. 0.3 <Mn / {(100-M)×f / M}<4 (2) 0.5 <Mn / {(100-M)×f / M}<2.5 (3) In the above formula, f, M, and Mn are equivalent to the same symbols in formula (1), respectively.

[0049] Reactive polyolefins (B1) can be obtained, for example, by grafting a compound (b1) having a group that reacts with a carbodiimide group, and optionally other ethylenically unsaturated monomers, onto a polyolefin (b2) that serves as the graft main chain. Examples of graft reaction methods include conventionally known graft polymerization methods such as the solution method and the melt-kneading method. The graft reaction may also be carried out in the presence of a radical initiator such as an organic peroxide.

[0050] The polyolefin (b2) that forms the graft main chain is a polymer of olefin monomers. Examples of olefin monomers include aliphatic α-olefins, cyclic olefins, non-conjugated dienes, and aromatic olefins. Among these, aliphatic α-olefins are preferred. One type of olefin monomer may be used, or two or more types may be used.

[0051] The number of carbon atoms in the aliphatic α-olefin is preferably 2 to 20, more preferably 2 to 10, and even more preferably 2 to 8. Examples of aliphatic α-olefins include ethylene, propylene, 1-butene, 4-methyl-1-pentene, 3-methyl-1-butene, 1-hexene, and 1-octene. Among these, propylene, ethylene, and 1-butene are preferred, with propylene being more preferred. Examples of cyclic olefins include tetracyclododecene and norbornene. Examples of aromatic olefins include styrene.

[0052] The polyolefin (b2) preferably has constituent units derived from aliphatic α-olefins. The content of aliphatic α-olefin-derived constituent units in the polyolefin (b2) is preferably more than 50 mol%, more preferably 70 mol% or more, and even more preferably 90 mol% or more, of the total amount of constituent units derived from olefin monomers. The content of each constituent unit in the polyolefin (b2) is: 13 It is measured by 13C-NMR.

[0053] In polyolefins (b2), polyolefins in which the content of propylene-derived structural units exceeds 50 mol% of the total amount of structural units derived from olefin monomers are also called "propylene-based polymers," and polyolefins in which the content of ethylene-derived structural units exceeds 50 mol% of the total amount of structural units derived from olefin monomers are also called "ethylene-based polymers."

[0054] From the viewpoint of obtaining molded articles with superior mechanical properties, the polyolefin (b2) is preferably a propylene-based polymer; that is, the carbodiimide-modified polyolefin is preferably a carbodiimide-modified propylene-based polymer. The content of propylene-derived structural units in the polyolefin (b2) is preferably more than 50 mol%, more preferably 60 mol% or more, even more preferably 70 mol% or more, and particularly preferably 80 mol% or more, out of the total amount of structural units derived from olefin monomers.

[0055] Polyolefin (b2) may be a propylene homopolymer or a copolymer of propylene and a comonomer other than propylene. If polyolefin (b2) is a copolymer, it may be a random copolymer, a block copolymer, or a graft copolymer.

[0056] The MFR of polyolefin (b2) is preferably 0.01 to 500 g / 10 min, more preferably 0.1 to 300 g / 10 min, and even more preferably 0.5 to 100 g / 10 min. The MFR is measured under a 2.16 kg load by a method in accordance with ASTM D1238. The measurement temperature is 230°C if the polyolefin (b2) is a propylene-based polymer, and 190°C if it is an ethylene-based polymer.

[0057] The number-average molecular weight (Mn) of polyolefin (b2), as measured by gel permeation chromatography (GPC), is preferably 1,000 to 1,000,000, more preferably 5,000 to 500,000, and even more preferably 10,000 to 100,000. Details of the measurement conditions will be described later.

[0058] The above Mn can be determined in propylene polymers by using polypropylene equivalents if the comonomer content is 10 mol% or less, and by using propylene-ethylene equivalents (using a propylene content of 70 mol% as the reference substance) if it exceeds 10 mol%. In ethylene-based polymers, the above Mn can be determined on a polyethylene basis if the comonomer content is 10 mol% or less, and on an ethylene-propylene basis (using ethylene content of 70 mol% as the reference substance) if it exceeds 10 mol%.

[0059] The density of polyolefin (b2) is preferably 0.8 to 1.5 g / cm³. 3 , more preferably 0.8 to 1.3 g / cm³ 3 More preferably 0.8 to 1.1 g / cm³ 3 Particularly preferred is 0.8 to 1.0 g / cm³. 3 The density is measured according to the ASTM D1505 (density gradient pipe method).

[0060] Polyolefin (b2) can be produced by conventionally known methods, for example, by polymerizing olefin monomers using a titanium-based catalyst, a vanadium-based catalyst, or a metallocene catalyst. Polyolefin (b2) may be in the form of either a resin or an elastomer, and both isotactic and syndiotactic structures can be used. There are no particular restrictions on stereoregularity. Commercially available polymers may also be used as is.

[0061] The amount of compound (b1) used in the reaction between polyolefin (b2) and compound (b1) is preferably 0.1 to 10% by mass, more preferably 0.1 to 8% by mass, and even more preferably 0.1 to 6% by mass, of the total mass of polyolefin (b2) and compound (b1).

[0062] Reactive polyolefins (B1) can be obtained by copolymerizing an olefin (b3) with a compound (b1) having a group that reacts with a carbodiimide group. Examples of olefins (b3) include the olefin monomers exemplified above as olefins when forming the polyolefin (b2) that forms the graft main chain, and the preferred examples are similar. The above copolymerization method can be carried out using a conventionally known radical copolymerization method.

[0063] The amount of compound (b1) used in the reaction between olefin (b3) and compound (b1) is preferably 0.1 to 10% by mass, more preferably 0.1 to 8% by mass, and even more preferably 0.1 to 6% by mass, out of 100% by mass of the total of olefin (b3) and compound (b1).

[0064] (Carbodiimide group-containing compound (B2)) Examples of carbodiimide group-containing compounds (B2) include polycarbodiimides having repeating units represented by the following formula. -N=C=NR 1 - In the above formula, R 1 This represents a divalent organic group, preferably a divalent organic group having 2 to 40 carbon atoms.

[0065] The number-average molecular weight (Mn) of the carbodiimide group-containing compound (B2), determined by gel permeation chromatography (GPC), is preferably 400 to 500,000, more preferably 500 to 100,000, even more preferably 600 to 50,000, even more preferably 700 to 10,000, and particularly preferably 1,000 to 8,000, from the viewpoint of impact resistance and other factors.

[0066] The carbodiimide group-containing compound (B2) may also contain monocarbodiimide.

[0067] From the viewpoint of reactivity with reactive polyolefin (B1), the number of carbodiimide groups in one molecule of the carbodiimide group-containing compound (B2) is preferably 5 or more, more preferably 8 or more. The upper limit of the number of carbodiimide groups in one molecule of the carbodiimide group-containing compound (B2) is not particularly limited, but is, for example, 30.

[0068] The content of carbodiimide groups in the carbodiimide group-containing compound (B2) is: 13 It can be measured by 13C-NMR, IR, or titration, and can be determined as the carbodiimide group equivalent. 13The concentration was 130-142 ppm in C-NMR and 2130-2140 cm in IR. -1 A peak attributed to the carbodiimide group can be observed, and the carbodiimide group content can be measured using this peak.

[0069] The degree of polymerization of polycarbodiimide is preferably 2 to 40, more preferably 4 to 20. The degree of polymerization of polycarbodiimide can be adjusted, for example, by selecting the catalyst, reaction temperature, and end-capturing agent in the reaction described below.

[0070] The carbodiimide group-containing compound (B2) can be synthesized, for example, by reacting an organic polyisocyanate in the presence of a catalyst that promotes the carbodiimide reaction of the isocyanate group. The above reaction may be carried out without a solvent or in an inert solvent. A commercially available carbodiimide group-containing compound may be used as the carbodiimide group-containing compound (B2).

[0071] As the organic polyisocyanate, organic diisocyanates are preferred. Examples of organic diisocyanates include aliphatic diisocyanates such as hexamethylene diisocyanate; aromatic diisocyanates such as 4,4-diphenylmethane diisocyanate, 1,4-phenylenediisocyanate, 2,4-tolylene diisocyanate, and xylylene diisocyanate; and alicyclic diisocyanates such as cyclohexane-1,4-diisocyanate, dicyclohexylmethane-4,4'-diisocyanate, and isophorone diisocyanate.

[0072] Examples of the catalysts mentioned above include alcoholates such as titanium, hafnium, zirconium, sodium, and calcium; and organophosphorus compounds such as phosphone oxide. In the above reaction, an end-capturing agent may be used. Examples of end-capturing agents include monoisocyanates such as phenyl isocyanate, tolyl isocyanate, and naphthyl isocyanate; and active hydrogen-containing compounds such as methanol, ethanol, diethylamine, cyclohexylamine, succinic acid, benzoic acid, and ethyl mercaptan.

[0073] (Method for producing carbodiimide-modified polyolefin compositions) A carbodiimide-modified polyolefin composition as a compatibilizer (B) can be obtained, for example, by reacting a reactive polyolefin (B1) with a carbodiimide group-containing compound (B2) by melt kneading, such as by melt modification. The melt kneading is preferably carried out in the presence of a propylene polymer (B3). This makes it possible to obtain a carbodiimide-modified polyolefin composition in which the reaction product is uniformly dispersed in the propylene polymer (B3), and to obtain a molded article with superior mechanical properties and balance.

[0074] As a melt-mixing method, for example, a reactive polyolefin (B1), a carbodiimide group-containing compound (B2), and optionally a propylene polymer (B3) are charged simultaneously or sequentially into an apparatus such as a Henschel mixer, V-type blender, tumbler blender, or ribbon blender and mixed, and then melt-mixed in a single-screw extruder, multi-screw extruder, kneader, or Banbury mixer. Using equipment with excellent mixing performance, such as a multi-screw extruder, kneader, or Banbury mixer, is preferable because it allows for more uniform dispersion or reaction of each component.

[0075] The reactive polyolefin (B1), the carbodiimide group-containing compound (B2), and optionally the propylene polymer (B3) can be supplied from a hopper after being pre-mixed, or some components can be supplied from a hopper and the remaining components supplied from a supply port installed at any point between the hopper and the tip of the extruder.

[0076] The melting and mixing temperature is preferably above the highest melting point of each component being mixed. The melting and mixing temperature is preferably 180 to 320°C, more preferably 200 to 300°C, and even more preferably 230 to 280°C.

[0077] When reacting a reactive polyolefin (B1) with a carbodiimide group-containing compound (B2), the molar ratio (B2 / B1) is preferably 0.2 to 3.2, more preferably 0.4 to 2.6, and even more preferably 0.7 to 2.2, from the viewpoint of obtaining a carbodiimide-modified polyolefin with high reaction efficiency and superior fluidity.

[0078] A carbodiimide-modified polyolefin composition as a compatibilizer (B) can be produced, for example, by reacting a reactive polyolefin (B1) with a carbodiimide group-containing compound (B2) in the presence of a propylene polymer (B3), for example, by melt kneading. In the production of the above-mentioned carbodiimide-modified polyolefin composition, in one embodiment, 10 to 98 parts by mass, more preferably 30 to 96 parts by mass, and even more preferably 50 to 94 parts by mass of a propylene polymer (B3) is used, 2 to 90 parts by mass, more preferably 4 to 70 parts by mass, and even more preferably 6 to 50 parts by mass of a reactive polyolefin (B1) is used, and 0.1 to 40 parts by mass, more preferably 0.5 to 25 parts by mass, and even more preferably 1 to 15 parts by mass of a carbodiimide group-containing compound (B2) is used. However, the total of the propylene polymer (B3) and the reactive polyolefin (B1) is 100 parts by mass.

[0079] In carbodiimide-modified polyolefin compositions, a certain amount of carbodiimide groups are consumed during the reaction between the reactive polyolefin (B1) and the carbodiimide group-containing compound (B2). The carbodiimide residues linked to the polyolefin as part of the same molecular chain interact with the cured thermosetting resin (C), contributing to improved dispersibility or compatibility. The amount of carbodiimide residues was 2130-2140 cm³ as measured by IR. -1This can be determined from the magnitude of the peak caused by the contraction vibration of the N=C=N group located there.

[0080] In the above reaction, it is preferable to control the reaction between the group that reacts with the carbodiimide group in the reactive polyolefin (B1) and the carbodiimide group in the carbodiimide group-containing compound (B2). The progress of the above reaction can be confirmed, for example, by calculating the reaction rate using the following method.

[0081] After preparing a heat-pressed sheet containing a reactive polyolefin (B1) and a heat-pressed sheet containing the reaction product of the reactive polyolefin (B1) and a carbodiimide group-containing compound (B2), the infrared absorption of each sheet is measured using an infrared absorption analyzer. From the resulting chart, the absorption bands derived from the groups that react with the carbodiimide groups before and after the reaction (when maleic anhydride is used as compound (b1), the range is 1780-1790 cm⁻¹) are identified. -1 The absorbance of the peak intensity in the vicinity can be measured, and the reaction rate can be calculated using the following formula. Response rate (%) = {X / Y} × 100 In the above formula, X represents the difference in absorbance (before reaction - after reaction) originating from the group that reacts with the carbodiimide group, and Y represents the absorbance originating from the group that reacts with the carbodiimide group (before reaction).

[0082] The reaction rate defined by the above formula in the carbodiimide-modified polyolefin composition is preferably 40-100%, more preferably 60-100%, and even more preferably 80-100%.

[0083] Acid-modified polyolefins Examples of acid-modified polyolefins, which are components (B), include, for example, grafted polymers of polyolefins with at least one acid component selected from the group consisting of unsaturated carboxylic acids and their derivatives, and copolymers of olefins and the above acid component.

[0084] Details of the methods for producing unsaturated carboxylic acids and their derivatives, and acid-modified polyolefins, are as described above in the (Reactive Polyolefin (B1)) section, and the preferred examples are also the same. The polyolefin is the same as that of polyolefin (b2) described above, and the preferred examples are also the same, specifically propylene polymers are preferred. The olefin is the same as that of olefin (b3) described above, and the preferred examples are also the same. Specifically, maleic anhydride-modified propylene polymers and maleic acid-modified propylene polymers are preferred as acid-modified polyolefins.

[0085] The content of the structure (e.g., graft amount) derived from the above acid component in the acid-modified polyolefin, which is an example of component (B), is preferably 0.1 to 10% by mass, more preferably 0.1 to 8% by mass, and even more preferably 0.1 to 6% by mass, based on the mass of the acid-modified polyolefin. The above content ratio is determined by the characteristic peak in the infrared absorption spectrum that is attributed to the structure derived from the above acid component (for example, when maleic anhydride is used as the above acid component, an infrared spectrophotometer is used to measure the peak typically at 1780-1790 cm⁻¹). -1 If a peak of the carbonyl group of maleic anhydride is detected nearby, it is measured by IR, 13 C-NMR or 1 It may also be measured by 1H-NMR.

[0086] The MFR of an acid-modified polyolefin, which is an example of component (B), is preferably 0.01 to 500 g / 10 min, more preferably 0.1 to 400 g / 10 min, and even more preferably 1 to 300 g / 10 min, from the viewpoint of having better dispersibility or compatibility with the cured product (C) of the thermosetting resin, and may also be, for example, 5 g / 10 min or more, 10 g / 10 min or more, or 50 g / 10 min or more. The MFR is measured under conditions of 190°C and a load of 2.16 kg by a method in accordance with ASTM D1238.

[0087] The density of an example of component (B), an acid-modified polyolefin, is preferably 0.8 to 1.5 g / cm³. 3, more preferably 0.8 to 1.3 g / cm³ 3 More preferably 0.8 to 1.1 g / cm³ 3 Particularly preferred is 0.8 to 1.0 g / cm³. 3 The density is measured according to the ASTM D1505 (density gradient pipe method).

[0088] <Cured product of thermosetting resin (C)> This composition contains a cured product (C) of a thermosetting resin. Examples of thermosetting resins include thermosetting (meth)acrylic resins, unsaturated polyester resins, urethane resins, epoxy resins, phenolic resins, melamine resins, and silicone resins. Thermosetting (meth)acrylic resins include, for example, crosslinkable group-containing (meth)acrylic polymers such as hydroxyl group-containing (meth)acrylic polymers and epoxy group-containing (meth)acrylic polymers, and crosslinking agents such as isocyanate compounds. The thermosetting resin may be of one type or two or more types.

[0089] The cured product (C) preferably contains a group that is reactive with a functional group (e.g., a carbodiimide group) present in the compatibilizer (B). Examples of such groups include carboxyl groups, amino groups, hydroxyl groups, and thiol groups.

[0090] The cured product (C) may be included in particulate form in this composition.

[0091] The cured product (C) contained in this composition may be one type or two or more types. The content or blending ratio of cured product (C) in this composition is preferably 0.01 to 5% by mass, more preferably 0.05 to 4% by mass, and even more preferably 0.1 to 3% by mass, based on the mass of this composition.

[0092] <Filler (D)> This composition may further contain filler (D). Examples of fillers (D) include inorganic fillers and organic fillers (excluding fillers equivalent to the cured product (C) of thermosetting resins).

[0093] Examples of inorganic fillers include silica, talc, clay, mica, kaolin, kaolinite, montmorillonite, bentonite, diatomaceous earth, alumina, titanium dioxide, magnesium oxide, pumice powder, pumice balloons, aluminum hydroxide, magnesium hydroxide, magnesium carbonate, calcium sulfate, calcium titanate, barium sulfate, calcium sulfite, asbestos, glass fibers, glass flakes, glass beads, calcium silicate, boron fibers, carbon fibers, carbon black, carbon nanofibers, aluminum powder, and molybdenum sulfide. Among these, talc is preferred.

[0094] Examples of organic fillers include fibers such as all-aromatic polyamide fibers, aliphatic polyamide fibers, polyester fibers, acrylic fibers, and cellulose fibers; liquid crystal polyesters; and fillers obtained by decomposing plants into fibrous or powdery forms.

[0095] This composition may contain one or more fillers (D). When the composition contains filler (D), the amount of filler (D) is preferably 1 to 60 parts by mass, more preferably 2 to 50 parts by mass, and even more preferably 3 to 40 parts by mass, based on 100 parts by mass of the total of the propylene polymer (A) and the optional elastomer component (E).

[0096] <Elastomer component (E)> The composition may further contain an elastomer component (E). The elastomer component (E) improves, for example, the balance between rigidity and impact resistance of the molded article formed from the composition. Examples of elastomer component (E) include ethylene-α-olefin copolymer rubber and styrene-based rubber.

[0097] In ethylene-α-olefin copolymer rubber, α-olefins having 3 to 20 carbon atoms are preferred, and α-olefins having 3 to 10 carbon atoms are more preferred. Examples of α-olefins include propylene, 1-butene, 1-pentene, 4-methyl-1-pentene, 1-hexene, 1-heptene, 1-octene, 1-nonene, and 1-decene. Specific examples of ethylene-α-olefin copolymer rubber include ethylene-propylene copolymer rubber, ethylene-1-butene copolymer rubber, and ethylene-1-octene copolymer rubber.

[0098] Examples of styrene-based rubbers include styrene-butadiene-styrene-based SBS rubber, styrene-butadiene-butylene-styrene-based SBBS rubber, and styrene-ethylene-butylene-styrene-based SEBS rubber; and rubbers modified with acids or bases, such as maleination-modified SEBS, maleination-modified SBBS, imino-modified SEBS, and imino-modified SBBS.

[0099] This composition may contain one or more elastomer components (E). When this composition contains an elastomer component (E), the content of the elastomer component (E) is preferably 5 to 80% by mass, more preferably 10 to 75% by mass, and even more preferably 15 to 70% by mass, of the total 100% by mass of the propylene polymer (A) and the elastomer component (E), from the viewpoint of impact resistance and the like.

[0100] <Additive (F)> This composition may further contain additives (F) other than the components listed above. Examples of additives (F) include known additives used in the field of polyolefins, such as chlorinated polyolefins such as chlorinated polypropylene, plasticizers, tackifiers, adhesion promoters, antistatic agents, colorants, processing aids, lubricants, flame retardants, blooming inhibitors, process stabilizers, antioxidants, UV absorbers, heat stabilizers, weather stabilizers, and anti-aging agents.

[0101] This composition may contain one or more additives (F). The content ratio of additive (F) in this composition is not particularly limited, but is preferably 40% by mass or less, more preferably 30% by mass or less, and even more preferably 20% by mass or less.

[0102] <Method for producing the composition> This composition can be manufactured, for example, by melting and kneading components (A) to (C), and any additional components as needed, either all at once or sequentially. Examples of components that may be added as needed include a filler (D), an elastomer component (E), and an additive (F).

[0103] This composition can be produced by blending a compatibilizer (B) and other components as needed with recycled material, recycled resin, or waste material (hereinafter collectively referred to as "recycled material, etc.") containing, for example, a propylene polymer (A) and a cured thermosetting resin (C). The above recycled material, etc. can be obtained, for example, by recovering a component (e.g., a bumper) containing a propylene polymer (A) and a cured thermosetting resin (C) that constitutes a mobile body such as an automobile, and crushing the component. Alternatively, this composition may be produced by blending a compatibilizer (B), etc., with the above recycled material, etc., and then further blending a propylene polymer (A), etc., with the mixture.

[0104] In this case, the propylene polymer (A) contained in the composition may be a propylene polymer contained in the recycled material, etc., used alone, or a blend of the propylene polymer contained in the recycled material, etc., and a virgin propylene polymer may be used. A virgin propylene polymer is a propylene polymer that has not yet been used, that is, has not gone through a use cycle (it is not a recycled material).

[0105] The above-mentioned component comprises, for example, a molded body containing a propylene polymer (A) and a coating film formed on the molded body containing a cured thermosetting resin (C). The coating film does not need to be removed from the above-mentioned component. Alternatively, the above-mentioned component may be pulverized after the coating film is removed, or the coating film may be removed after the above-mentioned component is pulverized. In this case as well, a small amount of the cured thermosetting resin (C) remains. As described above, even without removing the cured thermosetting resin (C), this composition can form a molded body with excellent mechanical properties.

[0106] As for the melt-mixing method, for example, the above components may be dry-blended and then melt-mixed using a single-screw or twin-screw extruder, Banbury mixer, tumbler, Henschel mixer, roll, various kneaders, etc. Industrially, an extruder is preferably used. The melt-mixing temperature is not particularly limited as long as the propylene polymer (A) and / or compatibilizer (B) are melted, but it is preferably 170 to 320°C, more preferably 180 to 280°C.

[0107] This composition, for example, A method of preparing a mixture of a propylene polymer (A) and a compatibilizer (B) in advance, and then mixing and kneading a cured thermosetting resin (C) into the mixture; A method of kneading a thermosetting resin cured product (C) with a compatibilizer (B) and then mixing it with a propylene polymer (A), specifically, a method of immersing the thermosetting resin cured product (C) in molten compatibilizer (B), or a method of immersing the thermosetting resin cured product (C) in a solution of compatibilizer (B) dissolved in a good solvent (e.g., xylene); It may be manufactured by [method].

[0108] [Molded products and articles] The molded articles of this disclosure are formed from the composition. Methods for molding this composition include, for example, injection molding, blow molding (e.g., injection blow molding, stretch blow molding, direct blow molding), vacuum forming, vacuum pressure forming, press molding, calendering, extrusion molding, stamping mold forming, and tape yarn forming, with injection molding and press molding being preferred.

[0109] The article of this disclosure comprises the molded body described above, and in one embodiment, the article comprises the molded body and a coating film formed on the surface of the molded body. The article may also include a primer layer between the molded body and the coating film.

[0110] The above coating film is formed from, for example, a thermosetting resin, and specifically includes a cured product of the thermosetting resin. Specific examples of thermosetting resins are as described above. By applying the above coating film, for example, added value such as aesthetic appeal can be given to the article, or the weather resistance can be improved to extend the lifespan of the article. The primer layer contains, for example, a thermoplastic resin, specifically a chlorinated polyolefin such as chlorinated polypropylene. By providing the primer layer, for example, the adhesion of the coating film to the molded article can be improved.

[0111] The thickness of the molded body may be, for example, 10 μm to 100 mm, 100 μm to 50 mm, or 500 μm to 10 mm. The thickness of the coating may be, for example, 1 to 300 μm, 5 to 100 μm, or 10 to 60 μm. The thickness of the primer layer may be, for example, 0.1 to 50 μm, 1 to 40 μm, or 5 to 30 μm.

[0112] This composition, molded articles, and articles can be used in a variety of applications, such as automotive parts and other mobile components, home appliance parts, electrical or electronic components, building materials, civil engineering materials, agricultural materials, daily necessities, films, sheets, foams, medical or hygiene products, and more. Among these, this composition, molded articles, and articles are particularly suitable for applications as automotive parts and other mobile components.

[0113] Examples of modes of transport include automobiles, bicycles, trains, aircraft, and ships. Examples of automotive parts include interior and exterior components such as bumpers, moldings, door trims, instrument panels, and console boxes. Other automotive parts include front ends, fan shrouds, cooling fans, engine undercovers, engine covers, radiator boxes, side doors, back door inner panels, back door outer panels, body panels, roof rails, door handles, luggage boxes, wheel covers, steering wheels, cooling modules, air cleaners, spoilers, fuel tanks, platforms, and side members.

[0114] [Example of an embodiment] This disclosure relates, for example, to the following [1] to

[13] . [1] A polymer composition comprising a propylene polymer (A), a compatibilizer having an olefin polymer skeleton (B), and a cured product of a thermosetting resin (C). [2] The polymer composition according to [1], wherein the compatibilizer (B) is at least one selected from the group consisting of carbodiimide-modified polyolefin compositions and acid-modified polyolefins. [3] The polymer composition according to [2], wherein the compatibilizer (B) is a carbodiimide-modified polyolefin composition comprising a reaction product of a polyolefin (B1) having a group that reacts with a carbodiimide group and a compound (B2) having a carbodiimide group, and the content of the carbodiimide group in the carbodiimide-modified polyolefin composition is 0.1 to 200 mmol / 100 g. [4] The polymer composition according to [3], wherein the compound (B2) having the carbodiimide group has five or more of the carbodiimide groups in one molecule. [5] The polymer composition according to any one of [1] to [4], wherein the thermosetting resin is at least one selected from the group consisting of thermosetting (meth)acrylic resin, unsaturated polyester resin, urethane resin, epoxy resin, phenolic resin, melamine resin, and silicone resin. [6] The polymer composition according to any one of [1] to [5], wherein the content or blending ratio of the compatibilizer (B) is 1 to 30% by mass of the total of the propylene polymer (A) and the compatibilizer (B) in 100% by mass, and the content or blending ratio of the cured product of the thermosetting resin (C) is 0.01 to 5% by mass based on the mass of the polymer composition. [7] A polymer composition according to any one of [1] to [6], further containing filler (D). [8] The polymer composition according to any one of [1] to [7], further containing an elastomer component (E). [9] A molded article formed from any of the polymer compositions described in [1] to [8] above.

[10] An article comprising the molded body described in [9] above.

[11] The article according to

[10] , further comprising a coating film formed on the surface of the molded body.

[12] The article according to

[11] , wherein the coating film is a coating film formed from a thermosetting resin.

[13] The articles described in any of

[10] to

[12] above, which are bumpers, moldings, door trims, instrument panels, or console boxes. [Examples]

[0115] The present composition will be described in more detail below based on the examples, but the present composition is not limited in any way to these examples. The test methods for the raw materials used in the examples and comparative examples are as follows.

[0116] [Number average molecular weight (Mn)] The number-average molecular weight (Mn) was measured by GPC. Specifically, a Waters Alliance GPC-2000 gel permeation chromatograph was used. Two TSKgel GMH6-HT columns and two TSKgel GMH6-HTL columns were used for separation. All columns had a diameter of 7.5 mm and a length of 300 mm. The column temperature was 140°C. The mobile phase was o-dichlorobenzene (manufactured by Wako Pure Chemical Industries, Ltd.) containing 0.025% by mass of an antioxidant (butylhydroxytoluene, manufactured by Takeda Pharmaceutical Company Limited), which was transferred at 1.0 mL / min. The sample concentration was 15 mg / 10 mL, and the sample injection volume was 500 microliters. A differential refractometer was used as the detector. For carbodiimide group-containing compounds, standard polystyrene has a molecular weight of Mw < 1000 and Mw > 4 × 10⁻⁶. 6 In this case, use a product manufactured by Tosoh Corporation, 1000 ≤ Mw ≤ 4 × 10 6 In this case, Pressure Chemical Co., Ltd.'s product was used. When using maleic anhydride-modified polypropylene, Mn was calculated based on the polypropylene equivalent.

[0117] [Carbodiimide group content] The carbodiimide group content was calculated from the amount of fermentation.

[0118] [Amount of maleic anhydride graft] The amount of maleic anhydride grafted was measured using FT-IR by the following method. FT-IR measurement was performed by preparing a hot-pressed sheet from the sample at 250°C for 3 minutes, and then using an infrared spectrophotometer (JASCO Corporation, FT-IR410) with transmission at 1790 cm⁻¹. -1 The infrared absorption spectrum of the vicinity was measured. The measurement conditions were a resolution of 2 cm. -1 The cumulative number of times was set to 32.

[0119] [Response rate (%)] The reaction rate (%) between the reactive polyolefin (B1) and the carbodiimide group-containing compound (B2) was measured by FT-IR, and the amount of maleic anhydride grafted (absorbance derived from maleic anhydride (1790 cm) was also measured. -1 The calculation was performed using the formula described above.

[0120] [Preparation Example 1] 100 parts by mass of polypropylene (random polypropylene, MFR: 7g / 10 min, density: 0.910 g / cm³) 3 ;Hereinafter also referred to as "PP1") was mixed with 1 part by mass of maleic anhydride (manufactured by Wako Pure Chemical Industries, Ltd., hereinafter also referred to as "MAH") and 0.25 parts by mass of 2,5-dimethyl-2,5-bis(tert-butylperoxy)hexyn-3 (manufactured by NOF Corporation, trade name Perhexyn 25B). The resulting mixture was extruded using a twin-screw kneader (TEX-30, manufactured by Japan Steel Works Ltd., L / D: 40, with vacuum vent) under the conditions of cylinder temperature 220°C, screw rotation speed 200 rpm, and discharge rate 80 g / min to obtain maleic anhydride-modified polypropylene (hereinafter also referred to as "MAH-PP1"). The density of MAH-PP1 is 0.915 g / cm³ 3 That was the case.

[0121] MAH-PP1 was dissolved in xylene, and the resulting xylene solution was then reprecipitated and purified by pouring it into acetone. The amount of maleic anhydride grafted was measured by FT-IR and found to be 0.7% by mass. The manganese content of MAH-PP1 was 28,000. The value of Mn / {(100-M)×f / M} for MAH-PP1 was 2.0. [f: Molecular weight of maleic anhydride is 98 (g / mol)] M: Concentration of maleic anhydride-derived structure in MAH-PP1: 0.7% (mass) Mn: Number average molecular weight of MAH-PP1: 28,000

[0122] 90 parts by mass of PP1, 10 parts by mass of MAH-PP1 prepared as described above, and 1.7 parts by mass of a carbodiimide group-containing compound (manufactured by Nisshinbo Chemical Co., Ltd., trade name Carbodilite® HMV-8CA, carbodiimide group equivalent 278, number average molecular weight 2100, 9 carbodiimide groups per molecule) were mixed. The resulting mixture was extruded using a twin-screw kneader (TEX-30, manufactured by Japan Steel Works Ltd., L / D=40, with vacuum vent) under the conditions of cylinder temperature 250°C, screw rotation speed 200 rpm, and discharge rate 80 g / min to produce a carbodiimide-modified polyolefin composition (hereinafter also referred to as "CDI-PP1"). The obtained CDI-PP1 had an MFR (at 230°C with a 2.16 kg load) of 3 g / 10 min and a density of 0.910 g / cm³. 3 Furthermore, according to FT-IR analysis, a peak of maleic anhydride (1790 cm) was observed in CDI-PP1. -1 Since the absorbance derived from the group reacting with the carbodiimide group in MAH-PP1 had disappeared, the ratio of the difference (X) between the absorbance derived from the group reacting with the carbodiimide group in CDI-PP1 and the absorbance derived from the group reacting with the carbodiimide group in MAH-PP1 to the absorbance derived from the group reacting with the carbodiimide group in MAH-PP1 (Y) was 1, therefore the reaction rate between MAH-PP1 and the carbodiimide group-containing compound was 100%. The carbodiimide group content was 6.01 mmol per 100 g of the above carbodiimide-modified polyolefin composition (calculated from the amount charged).

[0123] [Example 1] Waste material from an automobile bumper was prepared. This waste material contained 99% by mass of polypropylene and 1% by mass of cured thermosetting (meth)acrylic resin. 90 parts by mass of granular material obtained by crushing waste automotive bumper material was mixed with 10 parts by mass of CDI-PP1. The resulting mixture was then mixed using a Toyo Seiki Laboplast Mill (two-screw batch type melting and fiber blending device) at a set temperature of 190°C, with a resin input of 50 g (device batch volume = 60 cm³). 3 The polymer composition was obtained by melt-kneading the mixture at 50 rpm for 10 minutes.

[0124] [Examples 2-3, Comparative Example 1] Instead of CDI-PP1, In Example 2, MAH-PP2 (maleic anhydride-modified homopolypropylene, MFR (190℃, 2.16kg load): 280g / 10min, density: 0.900g / cm³) 3 Graft amount of maleic anhydride: 0.6% by mass, In Example 3, MAH-PP3 (maleic anhydride-modified random polypropylene, MFR (190℃, 2.16kg load): 250g / 10min, density: 0.915g / cm³) was used. 3 Graft amount of maleic anhydride: 1.2% by mass A polymer composition was obtained in the same manner as in Example 1, except that the material used was the same. In Comparative Example 1, a polymer composition was obtained in the same manner as in Example 1, except that CDI-PP1 was not included.

[0125] [Izod impact strength (23℃)] The obtained polymer composition was press-molded at a temperature of 210°C, a pressure of 10 MPa, a preheating time of 5 minutes, and a pressurizing time of 2 minutes. A 3 mm thick press sheet was then rapidly cooled in a press molding machine set to 20°C. The notched Izod impact strength of the press sheet was measured at 23°C in accordance with ASTM D256.

[0126] [Young's modulus] The obtained polymer composition was press-molded at a temperature of 210°C, a pressure of 10 MPa, a preheating time of 5 minutes, and a pressurizing time of 2 minutes. A 3 mm thick press sheet was then rapidly cooled in a press molding machine set to 20°C. Dumbbell-shaped test specimens conforming to ASTM D638 Type 4 were prepared by punching out the press sheet. The Young's modulus of the dumbbell-shaped test specimens was measured using a tensile testing machine in accordance with ASTM D638, at a temperature of 23°C and a test speed of 50 mm / min.

[0127] [Table 1]

Claims

1. A propylene polymer (A) and Compatibilizer (B) having an olefin polymer skeleton, Cured product of thermosetting resin (C), A polymer composition containing the following:

2. The polymer composition according to claim 1, wherein the compatibilizer (B) is at least one selected from the group consisting of carbodiimide-modified polyolefin compositions and acid-modified polyolefins.

3. The compatibilizer (B) is a carbodiimide-modified polyolefin composition comprising a reaction product of a polyolefin (B1) having a group that reacts with a carbodiimide group and a compound (B2) having a carbodiimide group. The content of carbodiimide groups in the carbodiimide-modified polyolefin composition is 0.1 to 200 mmol / 100g. The polymer composition according to claim 2.

4. The polymer composition according to claim 3, wherein the compound (B2) having the carbodiimide group has five or more of the carbodiimide groups in one molecule.

5. The polymer composition according to claim 1, wherein the thermosetting resin is at least one selected from the group consisting of thermosetting (meth)acrylic resin, unsaturated polyester resin, urethane resin, epoxy resin, phenolic resin, melamine resin, and silicone resin.

6. The content or blending ratio of the compatibilizer (B) is 1 to 30% by mass of the total of 100% by mass of the propylene polymer (A) and the compatibilizer (B). The content or blending ratio of the cured product (C) of the thermosetting resin is 0.01 to 5% by mass, based on the mass of the polymer composition. The polymer composition according to claim 1.

7. The polymer composition according to claim 1, further containing filler (D).

8. The polymer composition according to claim 1, further containing an elastomer component (E).

9. A molded article formed from the polymer composition according to any one of claims 1 to 8.

10. An article comprising the molded body described in claim 9.

11. The article according to claim 10, further comprising a coating film formed on the surface of the molded body.

12. The article according to claim 11, wherein the coating film is a coating film formed from a thermosetting resin.

13. The article according to claim 10, which is a bumper, molding, door trim, instrument panel, or console box.

Images