Heat-resistance imparting additive and resin composition

Abstract

To provide a heat-resistance imparting additive capable of imparting heat resistance to a thermoplastic resin (in particular, a vinyl chloride resin) while sufficiently maintaining mechanical characteristics.SOLUTION: A heat-resistance imparting additive comprising: a copolymer (A) containing maleimide monomer units, aromatic vinyl monomer units, and cyano vinyl monomer units; and a copolymer (B) having a main chain containing ethylene units and containing at least one monomer unit (b) selected from cyano vinyl monomer units and unsaturated carboxylic ester monomer units, wherein in the copolymer (A), the content of maleimide monomer units is 5 to 30 mass%, the total content of aromatic vinyl monomer units and cyano vinyl monomer units is 65 to 90 mass%, and in the copolymer (A), the proportion of cyano vinyl monomer units relative to the total of aromatic vinyl monomer units and cyano vinyl monomer units is 5 to 30 mass%.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present disclosure relates to a heat resistance imparting material and a resin composition containing the heat resistance imparting material. [Background technology]

[0002] BACKGROUND ART Conventionally, a method of blending a heat resistance imparting material into a thermoplastic resin has been known as a means for improving the heat resistance of the thermoplastic resin.

[0003] For example, Patent Document 1 discloses that a heat resistance imparting agent having a specific Tg and specific parameters is kneaded and mixed with an ABS resin, the heat resistance imparting agent comprising 85 to 60 mass % of an aromatic vinyl-maleimide copolymer (a) having a specific weight-average molecular weight and 15 to 40 mass % of an AS copolymer (b) having a specific weight-average molecular weight and a specific ratio of AN and ST. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2005-298776 Summary of the Invention [Problem to be solved by the invention]

[0005] Vinyl chloride resins generally have excellent mechanical properties, weather resistance, and chemical resistance, and are therefore processed into various molded articles and used in many fields. To expand into further applications, there is a need for a method for imparting heat resistance to vinyl chloride resins while fully maintaining their good mechanical properties.

[0006] The present disclosure aims to provide a heat resistance imparting agent that can impart heat resistance to a thermoplastic resin (particularly a vinyl chloride resin) while sufficiently maintaining mechanical properties, and a resin composition containing the heat resistance imparting agent. [Means for solving the problem]

[0007] The present disclosure relates to, for example, the following [1] to

[11] . [1] a copolymer (A) containing maleimide-based monomer units, aromatic vinyl-based monomer units, and vinyl cyanide-based monomer units; a copolymer (B) having a main chain containing an ethylene unit and containing at least one monomer unit (b) selected from the group consisting of vinyl cyanide-based monomer units and unsaturated carboxylic acid ester-based monomer units; Including, In the copolymer (A), the content of the maleimide-based monomer units is 5 to 30% by mass, and the total content of the aromatic vinyl-based monomer units and the vinyl cyanide-based monomer units is 65 to 90% by mass, A heat resistance imparting agent, wherein in the copolymer (A), the proportion of the vinyl cyanide-based monomer units relative to the total of the aromatic vinyl-based monomer units and the vinyl cyanide-based monomer units is 5 to 30 mass %. [2] The heat resistance imparting material according to [1], wherein the copolymer (B) has the main chain and a side chain containing the monomer unit (b). [3] The heat resistance imparting material according to [2], wherein the side chain further contains an aromatic vinyl monomer unit. [4] The heat resistance imparting material according to any one of [1] to [3], wherein the main chain further has a monomer unit (i) having an epoxy group. [5] The heat resistance imparting material according to any one of [1] to [4], wherein the content of the copolymer (B) is 1 to 50 mass% based on the total amount of the copolymer (A) and the copolymer (B). [6] The heat resistance imparting material according to any one of [1] to [5], wherein the copolymer (A) further contains 0.1 to 10% by mass of an unsaturated dicarboxylic acid monomer unit. [7] The heat resistance imparting material according to any one of [1] to [6], which is for use in a thermoplastic resin. [8] The heat resistance imparting material according to any one of [1] to [7], which is for use in vinyl chloride resin. [9] A thermoplastic resin; [1] to [8], and a heat resistance imparting material according to any one of the above. A resin composition comprising:

[10] The resin composition according to [9], wherein the thermoplastic resin is a vinyl chloride resin.

[11] The resin composition according to [9] or

[10] , wherein the content of the heat resistance imparting agent is 10 to 100 parts by mass relative to 100 parts by mass of the thermoplastic resin. [Effects of the Invention]

[0008] According to the present disclosure, there is provided a heat resistance imparting agent capable of imparting heat resistance to a thermoplastic resin (particularly a vinyl chloride resin) while sufficiently maintaining mechanical properties. Also, according to the present disclosure, there is provided a resin composition containing the heat resistance imparting agent. DETAILED DESCRIPTION OF THE INVENTION

[0009] Preferred embodiments of the present disclosure will be described in detail below.

[0010] (heat resistance additive) The heat resistance imparting agent of the present embodiment contains a copolymer (A) and a copolymer (B).

[0011] Copolymer (A) is a copolymer containing maleimide-based monomer units, aromatic vinyl-based monomer units, and vinyl cyanide-based monomer units, while copolymer (B) is a copolymer having a main chain containing ethylene units and containing at least one monomer unit (b) selected from the group consisting of vinyl cyanide-based monomer units and unsaturated carboxylic acid ester-based monomer units.

[0012] In the copolymer (A), the content of maleimide-based monomer units is 5 to 30 mass %, and the total content of aromatic vinyl-based monomer units and vinyl cyanide-based monomer units is 65 to 90 mass %. In addition, in the copolymer (A), the proportion of vinyl cyanide-based monomer units to the total of aromatic vinyl-based monomer units and vinyl cyanide-based monomer units is 5 to 30 mass %.

[0013] The heat resistance imparting material of the present embodiment can impart heat resistance to a thermoplastic resin (particularly, a vinyl chloride resin) while sufficiently maintaining mechanical properties by combining a specific copolymer (A) and a specific copolymer (B).

[0014] <Copolymer (A)> The copolymer (A) contains maleimide-based monomer units, aromatic vinyl-based monomer units, and vinyl cyanide-based monomer units.

[0015] The maleimide-based monomer unit refers to a structural unit (repeating unit) formed from a maleimide-based monomer. The maleimide-based monomer unit does not necessarily have to be formed from a maleimide-based monomer, and may be formed, for example, by imidizing a structural unit formed from maleic acid with ammonia or a primary amine.

[0016] The maleimide-based monomer unit may be, for example, a structural unit represented by the following formula (1-1). [ka]

[0017] In formula (1-1), R 1 represents a hydrogen atom, an alkyl group, a cycloalkyl group or an aryl group, and these groups may have a substituent.

[0018] R 1 The alkyl group may be, for example, an alkyl group having 1 to 18 carbon atoms, an alkyl group having 1 to 12 carbon atoms, an alkyl group having 1 to 8 carbon atoms, an alkyl group having 1 to 6 carbon atoms, or an alkyl group having 1 to 4 carbon atoms.

[0019] R 1 Examples of the substituent that the alkyl group may have include a halogeno group (which may be, for example, a fluoro group, a chloro group, a bromo group, or an iodo group, and may be a fluoro group or a chloro group), a cycloalkyl group (which may be, for example, a cycloalkyl group having 3 to 9 carbon atoms, or may be a cycloalkyl group having 4 to 8 carbon atoms, or may be a cycloalkyl group having 5 to 7 carbon atoms), an aryl group (which may be, for example, an aryl group having 6 to 10 carbon atoms, or may be a phenyl group), an alkoxy group (which may be, for example, an alkoxy group having 1 to 18 carbon atoms, or may be an alkoxy group having 1 to 12 carbon atoms, an alkoxy group having 1 to 8 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms).

[0020] R 1 Examples of the alkyl group include a methyl group, an ethyl group, an n-butyl group, an n-octyl group, a dodecyl group, an octadecyl group, and a benzyl group.

[0021] R 1 The cycloalkyl group may be, for example, a cycloalkyl group having 3 to 9 carbon atoms, a cycloalkyl group having 4 to 8 carbon atoms, or a cycloalkyl group having 5 to 7 carbon atoms.

[0022] R 1 Examples of the substituent that the cycloalkyl group may have include a halogeno group (which may be, for example, a fluoro group, a chloro group, a bromo group, or an iodo group, and may be a fluoro group or a chloro group), an alkyl group (which may be, for example, an alkyl group having 1 to 18 carbon atoms, and may be an alkyl group having 1 to 12 carbon atoms, an alkyl group having 1 to 8 carbon atoms, an alkyl group having 1 to 6 carbon atoms, or an alkyl group having 1 to 4 carbon atoms), an aryl group (which may be, for example, an aryl group having 6 to 10 carbon atoms, and may be a phenyl group), and an alkoxy group (which may be, for example, an alkoxy group having 1 to 18 carbon atoms, and may be an alkoxy group having 1 to 12 carbon atoms, an alkoxy group having 1 to 8 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms).

[0023] R 1 Examples of the cycloalkyl group include a cyclopropyl group, a cyclohexyl group, and a cyclooctyl group.

[0024] R 1 The aryl group may be, for example, an aryl group having 6 to 10 carbon atoms, or may be a phenyl group.

[0025] R 1 Examples of the substituent that the aryl group may have include a halogeno group (which may be, for example, a fluoro group, a chloro group, a bromo group, or an iodo group, and may be a fluoro group or a chloro group), an alkyl group (which may be, for example, an alkyl group having 1 to 18 carbon atoms, and may be an alkyl group having 1 to 12 carbon atoms, an alkyl group having 1 to 8 carbon atoms, an alkyl group having 1 to 6 carbon atoms, or an alkyl group having 1 to 4 carbon atoms), a cycloalkyl group (which may be, for example, a cycloalkyl group having 3 to 9 carbon atoms, and may be a cycloalkyl group having 4 to 8 carbon atoms, or a cycloalkyl group having 5 to 7 carbon atoms), and an alkoxy group (which may be, for example, an alkoxy group having 1 to 18 carbon atoms, and may be an alkoxy group having 1 to 12 carbon atoms, an alkoxy group having 1 to 8 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms).

[0026] R 1 Examples of the aryl group include a phenyl group, a 4-methoxyphenyl group, and a toluyl group.

[0027] R 1 is preferably an alkyl group, a cycloalkyl group or an aryl group, and more preferably an aryl group.

[0028] The maleimide monomer may be, for example, a compound represented by the following formula (1-2): [ka]

[0029] In formula (1-2), R 1 has the same meaning as above.

[0030] The maleimide monomer is preferably an N-substituted maleimide, such as N-alkylmaleimides such as N-methylmaleimide, N-ethylmaleimide, Nn-butylmaleimide, Nn-octylmaleimide, Nn-dodecylmaleimide, and Nn-octadecylmaleimide; N-cycloalkylmaleimides such as N-cyclohexylmaleimide; and N-arylmaleimides such as N-phenylmaleimide and N-(4-methoxyphenyl)maleimide.

[0031] The aromatic vinyl monomer unit refers to a structural unit (repeating unit) formed from an aromatic vinyl monomer. The aromatic vinyl monomer refers to a compound having an aromatic ring and a carbon-carbon double bond bonded to the aromatic ring. The aromatic vinyl monomer is, for example, a compound having an aromatic ring and a -C(R 2 )=CH2(R 2 is a hydrogen atom or a methyl group).

[0032] Examples of the aromatic ring contained in the aromatic vinyl monomer unit and the aromatic vinyl monomer include a benzene ring, a naphthalene ring, a biphenyl ring, etc. The aromatic ring contained in the aromatic vinyl monomer unit and the aromatic vinyl monomer may be, for example, a benzene ring or a naphthalene ring, or may be a benzene ring.

[0033] The aromatic vinyl monomer unit may be, for example, a structural unit represented by the following formula (2-1). [ka]

[0034] In formula (2-1), R 2 represents a hydrogen atom or a methyl group, and Ar represents an aryl group which may have a substituent.

[0035] The aryl group of Ar may be, for example, an aryl group having 6 to 10 carbon atoms, a phenyl group or a naphthyl group, or a phenyl group.

[0036] Examples of the substituent that the aryl group of Ar may have include a halogeno group (which may be, for example, a fluoro group, a chloro group, a bromo group, or an iodo group, and may be a fluoro group or a chloro group), an alkyl group (which may be, for example, an alkyl group having 1 to 18 carbon atoms, and may be an alkyl group having 1 to 12 carbon atoms, an alkyl group having 1 to 8 carbon atoms, an alkyl group having 1 to 6 carbon atoms, or an alkyl group having 1 to 4 carbon atoms), a cycloalkyl group (which may be, for example, a cycloalkyl group having 3 to 9 carbon atoms, and may be a cycloalkyl group having 4 to 8 carbon atoms, or a cycloalkyl group having 5 to 7 carbon atoms), and an alkoxy group (which may be, for example, an alkoxy group having 1 to 18 carbon atoms, and may be an alkoxy group having 1 to 12 carbon atoms, an alkoxy group having 1 to 8 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms).

[0037] Examples of the aryl group for Ar include a phenyl group, a 4-methylphenyl group, a 4-ethylphenyl group, a 4-tert-butylphenyl group, a 4-chlorophenyl group, a 2,6-dichlorophenyl group, and a naphthyl group.

[0038] The aromatic vinyl monomer may be, for example, a compound represented by the following formula (2-2). [ka]

[0039] In formula (2-2), R 2 and Ar are as defined above.

[0040] Examples of aromatic vinyl monomers include styrene monomers (e.g., styrene, α-methylstyrene, ethylstyrene, tert-butylstyrene, chlorostyrene, dichlorostyrene, p-methylstyrene, α-methyl-p-methylstyrene, etc.), vinylnaphthalene monomers (e.g., 1-vinylnaphthalene, 2-vinylnaphthalene, etc.), and the like.

[0041] The aromatic vinyl monomer is preferably a styrene monomer, and the aromatic vinyl monomer unit is preferably a styrene monomer unit.

[0042] The vinyl cyanide monomer unit refers to a structural unit (repeating unit) formed from a vinyl cyanide monomer. The vinyl cyanide monomer refers to a compound having a carbon-carbon double bond and a cyano group bonded to the double bond. The vinyl cyanide monomer is, for example, a compound having a cyano group and a —C(R 3 )=CH2(R 3 is a hydrogen atom or a methyl group).

[0043] The vinyl cyanide monomer unit may be, for example, a structural unit represented by the following formula (3-1). [ka]

[0044] In formula (3-1), R 3 represents a hydrogen atom or a methyl group.

[0045] The vinyl cyanide monomer may be, for example, a structural unit represented by the following formula (3-2). [ka]

[0046] In formula (3-2), R 3 has the same meaning as above.

[0047] An example of the vinyl cyanide monomer is (meth)acrylonitrile.

[0048] The copolymer (A) may further contain an unsaturated dicarboxylic acid monomer unit.

[0049] The unsaturated dicarboxylic acid monomer unit refers to a structural unit (repeating unit) formed from an unsaturated dicarboxylic acid monomer. The unsaturated dicarboxylic acid monomer may be, for example, a compound having a carbon-carbon double bond and two carboxy groups bonded to the double bond, or a compound formed by dehydration condensation of the two carboxy groups of the compound.

[0050] Examples of the unsaturated dicarboxylic acid monomer include unsaturated dicarboxylic acids and unsaturated dicarboxylic acid anhydrides.

[0051] Examples of unsaturated dicarboxylic acids include maleic acid, itaconic acid, etc. Examples of unsaturated dicarboxylic acid anhydrides include maleic anhydride, itaconic anhydride, etc.

[0052] The unsaturated dicarboxylic acid monomer unit is preferably a maleic acid monomer unit (maleic acid unit or maleic anhydride unit), i.e., the unsaturated dicarboxylic acid monomer is preferably a maleic acid monomer (maleic acid or maleic anhydride).

[0053] The content of maleimide monomer units in copolymer (A) is 5% by mass or more based on the total amount of copolymer (A), and from the viewpoint of further improving the heat resistance of the resin composition, it may be 7% by mass or more, 9% by mass or more, 10% by mass or more, 11% by mass or more, or 12% by mass or more. Furthermore, the content of maleimide monomer units in copolymer (A) is 30% by mass or less based on the total amount of copolymer (A), and from the viewpoint of more easily maintaining good mechanical properties of the resin, it may be 27% by mass or less, 25% by mass or less, or 23% by mass or less.

[0054] In the copolymer (A), the total content of the aromatic vinyl monomer units and the vinyl cyanide monomer units is 65% by mass or more, and from the viewpoint of affinity with resins (especially chlorine-containing resins), it may be 70% by mass or more or 75% by mass or more. Also, the total content of the aromatic vinyl monomer units and the vinyl cyanide monomer units is 90% by mass or less, and from the viewpoint of maintaining the heat resistance imparted by the maleimide monomer units, it may be 87% by mass or less or 85% by mass or less.

[0055] In the copolymer (A), the proportion of the vinyl cyanide monomer units relative to the total of the aromatic vinyl monomer units and the vinyl cyanide monomer units is 5% by mass or more, and from the viewpoint of affinity with resins (especially chlorine-containing resins), it may be 7% by mass or more, 9% by mass or more, or 10% by mass or more. Furthermore, the proportion of the vinyl cyanide monomer units relative to the total of the aromatic vinyl monomer units and the vinyl cyanide monomer units is 30% by mass or less, and from the viewpoint of affinity with resins (especially chlorine-containing resins), it may be 25% by mass or less, 22% by mass or less, 20% by mass or less, or 18% by mass or less.

[0056] The content of aromatic vinyl monomer units in copolymer (A) may be, for example, 45% by mass or more, 50% by mass or more, 55% by mass or more, or 60% by mass or more, based on the total amount of copolymer (A). The content of aromatic vinyl monomer units may be, for example, 85% by mass or less, 80% by mass or less, or 75% by mass or less, based on the total amount of copolymer (A).

[0057] The content of the vinyl cyanide monomer unit in the copolymer (A) may be, for example, 3% by mass or more, 4% by mass or more, or 5% by mass or more, based on the total amount of the copolymer (A). The content of the vinyl cyanide monomer unit may be, for example, 27% by mass or less, 25% by mass or less, 20% by mass or less, or 18% by mass or less, based on the total amount of the copolymer (A).

[0058] The content of unsaturated dicarboxylic acid monomer units in copolymer (A) may be, for example, 10% by mass or less, 7% by mass or less, 5% by mass or less, or 3% by mass or less, based on the total amount of copolymer (A). Copolymer (A) may contain no unsaturated dicarboxylic acid monomer units, and the content of unsaturated dicarboxylic acid monomer units may be 0% by mass. Furthermore, when copolymer (A) contains unsaturated dicarboxylic acid monomer units, the content of unsaturated dicarboxylic acid monomer units may be, for example, 0.1% by mass or more, 0.5% by mass or more, 0.7% by mass or more, 0.9% by mass or more, or 1% by mass or more, based on the total amount of copolymer (A).

[0059] The total content of the maleimide-based monomer units, aromatic vinyl-based monomer units, vinyl cyanide-based monomer units, and unsaturated dicarboxylic acid-based monomer units in the copolymer (A) may be, for example, 80 mass% or more, 90 mass% or more, 95 mass% or more, 97 mass% or more, or 99 mass% or more, or may be 100 mass% based on the total amount of the copolymer (A).

[0060] The copolymer (A) may further contain other monomer units in addition to the maleimide-based monomer units, aromatic vinyl-based monomer units, vinyl cyanide-based monomer units, and unsaturated dicarboxylic acid-based monomer units. The other monomer units are not particularly limited, and examples thereof include unsaturated carboxylic acid ester units and unsaturated carboxylic acid units.

[0061] The content of other monomer units in copolymer (A) may be, for example, 20 mass% or less, 10 mass% or less, 5 mass% or less, 3 mass% or less, or 1 mass% or less, or may be 0 mass%, based on the total amount of copolymer (A).

[0062] The copolymer (A) may be a random copolymer or a block copolymer, but is preferably a random copolymer.

[0063] The weight average molecular weight (Mw) of the copolymer (A) may be, for example, 10,000 or more, and from the viewpoint of improving the mechanical strength of the resin, it may be 30,000 or more, 50,000 or more, or 60,000 or more. The weight average molecular weight (Mw) of the copolymer (A) may be, for example, 250,000 or less, and from the viewpoint of improving the dispersibility by improving the fluidity of the resin, it may be 200,000 or less, 180,000 or less, or 150,000 or less.

[0064] In this specification, the weight average molecular weight of the copolymer (A) is a value measured by gel permeation chromatography (GPC) in terms of polystyrene under the following conditions. Device name: SYSTEM-21 Shodex (Showa Denko Co., Ltd.) Column: Three PL gel MIXED-B columns in series Temperature: 40℃ Detection: Differential refractive index Solvent: tetrahydrofuran Concentration: 2% by mass Calibration curve: Prepared using standard polystyrene (PS) (manufactured by PL).

[0065] The glass transition temperature (Tg) of the copolymer (A) may be, for example, 110° C. or higher, and from the viewpoint of improving heat resistance, may be 120° C. or higher, 130° C. or higher, or 140° C. or higher. The glass transition temperature (Tg) of the copolymer (A) may be, for example, 200° C. or lower, and from the viewpoint of easier melting and kneading, may be 180° C. or lower, 170° C. or lower, or 160° C. or lower.

[0066] In this specification, the glass transition temperature (Tg) of the copolymer (A) refers to the extrapolated glass transition onset temperature (Tmg) of the maleimide copolymer measured in accordance with JIS K-7121 using the following apparatus and under the following measurement conditions. Device name: Differential scanning calorimeter Robot DSC6200 (Seiko Instruments Inc.) Heating rate: 10°C / min

[0067] <Copolymer (B)> The copolymer (B) has a main chain containing an ethylene unit and also contains at least one monomer unit (b) selected from the group consisting of vinyl cyanide monomer units and unsaturated carboxylic acid ester monomer units.

[0068] The main chain of such copolymer (B) containing ethylene units is highly flexible, which is thought to contribute to the improvement of impact resistance. In addition, copolymer (B) has good compatibility with copolymer (A) due to the inclusion of monomer unit (b), which is thought to improve the dispersibility of copolymer (A) in the resin, thereby improving the mechanical properties of the resin.

[0069] The copolymer (B) has a main chain containing an ethylene unit, which is a structural unit formed from ethylene and represented by —CH 2 —CH 2 —.

[0070] The content of ethylene units in the main chain may be, for example, 70 mol% or more, 80 mol% or more, 85 mol% or more, or 90 mol% or more, based on the total number of monomer units constituting the main chain, and may be, for example, 99 mol% or less, 98 mol% or less, or 97 mol% or less, based on the total number of monomer units constituting the main chain.

[0071] The main chain may further contain a monomer unit (b) and a monomer unit (i) having an epoxy group.

[0072] The monomer unit (i) may be, for example, an unsaturated carboxylic acid ester-based monomer unit, i.e., the main chain may contain an unsaturated carboxylic acid ester-based monomer unit as a monomer unit corresponding to both the monomer unit (i) and the monomer unit (b).

[0073] The unsaturated carboxylic acid ester monomer unit refers to a structural unit (repeating unit) formed from an unsaturated carboxylic acid ester monomer. The unsaturated carboxylic acid ester monomer may be, for example, a compound having a carbon-carbon double bond, a carbonyloxy group bonded to the double bond, and a monovalent group bonded to the carbonyloxy group.

[0074] An example of the unsaturated carboxylic acid ester monomer unit as the monomer unit (i) is a structural unit represented by the following formula (4-1). [ka]

[0075] In formula (4-1), R 41 represents a hydrogen atom or a methyl group, and R 42 represents a monovalent group having an epoxy group.

[0076] R 42 An example of the monovalent group having an epoxy group in the formula (I) is a glycidyl group.

[0077] In the main chain, the total amount of ethylene units and monomer units (i) may be, for example, 80 mol% or more, 90 mol% or more, 95 mol% or more, 97 mol% or more, or 99 mol% or more, or may be 100 mol%, based on the total number of monomer units constituting the main chain.

[0078] The copolymer (B) may have a side chain containing the monomer unit (b).

[0079] In the side chain, examples of the vinyl cyanide monomer unit of the monomer unit (b) include the same as the vinyl cyanide monomer unit in the copolymer (A).

[0080] In the side chain, examples of the unsaturated carboxylic acid ester monomer unit of the monomer unit (b) include a structural unit represented by the following formula (5-1). [ka]

[0081] In formula (5-1), R 51 represents a hydrogen atom or a methyl group, and R 52 represents an alkyl group, a cycloalkyl group or an aryl group, and these groups may have a substituent.

[0082] R 52 The alkyl group, cycloalkyl group and aryl group of R 1 Examples of the alkyl group, cycloalkyl group and aryl group are the same as those of the alkyl group, cycloalkyl group and aryl group mentioned above.

[0083] The side chain may further contain an aromatic vinyl monomer unit. Examples of the aromatic vinyl monomer unit in the side chain include the same aromatic vinyl monomer units as those in the copolymer (A).

[0084] Examples of the side chain include the following:

[0085] One embodiment of the side chain (hereinafter also referred to as side chain (1)) contains a vinyl cyanide monomer unit and an aromatic vinyl monomer unit.

[0086] The content of the vinyl cyanide monomer unit in the side chain (1) may be, for example, 5% by mass or more based on the total amount of the side chain (1), and from the viewpoint of better affinity with the copolymer (A), it may be 10% by mass or more, 13% by mass or more, or 15% by mass or more. The content of the vinyl cyanide monomer unit in the side chain (1) may be, for example, 50% by mass or less based on the total amount of the side chain (1), and from the viewpoint of better affinity with the copolymer (A), it may be 45% by mass or less, 40% by mass or less, or 35% by mass or less.

[0087] The content of the aromatic vinyl monomer units in the side chain (1) may be, for example, 50% by mass or more based on the total amount of the side chain (1), and from the viewpoint of better affinity with the copolymer (A), it may be 55% by mass or more, 60% by mass or more, or 65% by mass or more. The content of the aromatic vinyl monomer units in the side chain (1) may be, for example, 95% by mass or less based on the total amount of the side chain (1), and from the viewpoint of better affinity with the copolymer (A), it may be 90% by mass or less, 85% by mass or less, or 80% by mass or less.

[0088] In the side chain (1), the ratio (mass ratio) of the content of the vinyl cyanide monomer units to the content of the aromatic vinyl monomer units may be, for example, 0.05 or more, and from the viewpoint of better affinity with the copolymer (A), it may be 0.11 or more, 0.17 or more, or 0.25 or more. In addition, in the side chain (1), the ratio (mass ratio) of the content of the vinyl cyanide monomer units to the content of the aromatic vinyl monomer units may be, for example, 1.00 or less, and from the viewpoint of better affinity with the copolymer (A), it may be 0.80 or less, 0.65 or less, or 0.50 or less.

[0089] In the side chain (1), the total amount of the vinyl cyanide monomer units and the aromatic vinyl monomer units may be, for example, 80 mass % or more, 90 mass % or more, 95 mass % or more, 97 mass % or more, or 99 mass % or more, or may be 100 mass %, based on the total amount of the side chain (1).

[0090] Another embodiment of the side chain (hereinafter also referred to as side chain (2)) contains an unsaturated carboxylic acid ester monomer unit.

[0091] The side chain (2) may contain two or more types of unsaturated carboxylic acid ester monomer units. The side chain (2) may be, for example, R 52 a first unsaturated carboxylic acid ester monomer unit in which R 52 and a second unsaturated carboxylic acid ester monomer unit in which the alkyl group has 4 or more carbon atoms.

[0092] In the side chain (2), the content of the first unsaturated carboxylic acid ester monomer unit may be, for example, 0% by mass or more based on the total amount of the side chain (2), and from the viewpoint of improving affinity with the copolymer (A), vinyl chloride resin, etc., it may be 5% by mass or more, 10% by mass or more, 15% by mass or more, or 20% by mass or more. In addition, in the side chain (2), the content of the first unsaturated carboxylic acid ester monomer unit may be, for example, 100% by mass or less based on the total amount of the side chain (2), and from the viewpoint of improving impact resistance, it may be 95% by mass or less, 90% by mass or less, 85% by mass or less, or 80% by mass or less.

[0093] In the side chain (2), the content of the second unsaturated carboxylic acid ester monomer unit may be, for example, 0% by mass or more based on the total amount of the side chain (2), or from the viewpoint of better affinity with vinyl chloride resins, impact modifiers, etc., it may be 5% by mass or more, 10% by mass or more, 15% by mass or more, or 20% by mass or more. In addition, in the side chain (2), the content of the second unsaturated carboxylic acid ester monomer unit may be, for example, 100% by mass or less based on the total amount of the side chain (2), or from the viewpoint of improving affinity with the copolymer (A), it may be 95% by mass or less, 90% by mass or less, 85% by mass or less, or 80% by mass or less.

[0094] When the side chain (2) contains the first unsaturated carboxylic acid ester monomer unit and the second unsaturated carboxylic acid ester monomer unit, the ratio (mass ratio) of the content of the second unsaturated carboxylic acid ester monomer unit to the content of the first unsaturated carboxylic acid ester monomer unit may be, for example, 0.05 or more, and from the viewpoint of improving impact resistance, may be 0.11 or more, 0.17 or more, or 0.25 or more. Furthermore, in the side chain (2), the ratio (mass ratio) of the content of the second unsaturated carboxylic acid ester monomer unit to the content of the first unsaturated carboxylic acid ester monomer unit may be, for example, 20 or less, and from the viewpoint of improving affinity with the copolymer (A), may be 10 or less, 5.7 or less, or 4 or less.

[0095] In the side chain (2), the content of the unsaturated carboxylic acid ester monomer units (e.g., the total amount of the first unsaturated carboxylic acid ester monomer units and the second unsaturated carboxylic acid ester monomer units) may be, for example, 80 mass% or more, 90 mass% or more, 95 mass% or more, 97 mass% or more, or 99 mass% or more, or may be 100 mass% based on the total amount of the side chain (2).

[0096] When copolymer (B) has a main chain and side chains, the proportion of the side chains in copolymer (B) may be, for example, 5% by mass or more based on the total amount of copolymer (B), and from the viewpoint of better affinity with copolymer (A), it may be 10% by mass or more, 20% by mass or more, or 25% by mass or more. Furthermore, the proportion of the side chains in copolymer (B) may be, for example, 60% by mass or less based on the total amount of copolymer (B), and from the viewpoint of further improving impact resistance, it may be 50% by mass or less, 45% by mass or less, or 40% by mass or less.

[0097] The weight average molecular weight (Mw) of the copolymer (B) may be, for example, 10,000 or more, and from the viewpoint of further improving impact resistance, it may be 50,000 or more, 70,000 or more, or 90,000 or more. The weight average molecular weight (Mw) of the copolymer (B) may be, for example, 300,000 or less, and from the viewpoint of improving dispersibility by improving the fluidity of the resin, it may be 200,000 or less, 180,000 or less, or 160,000 or less.

[0098] In this specification, the weight average molecular weight of the copolymer (B) is a value measured by gel permeation chromatography (GPC) in terms of polystyrene, and indicates a value measured under the following conditions. Device name: SYSTEM-21 Shodex (Showa Denko Co., Ltd.) Column: Three PL gel MIXED-B columns in series Temperature: 40℃ Detection: Differential refractive index Solvent: tetrahydrofuran Concentration: 2% by mass Calibration curve: Prepared using standard polystyrene (PS) (manufactured by PL).

[0099] The copolymer (B) may be a commercially available product. Suitable examples of the copolymer (B) include Modiper (registered trademark) A4300, Modiper (registered trademark) A4400, Bondfast (registered trademark), and Rexpearl EMA (registered trademark).

[0100] In the heat resistance imparting agent of this embodiment, the content of copolymer (B) is, for example, 1% by mass or more based on the total amount of copolymer (A) and copolymer (B), and from the viewpoint of further improving impact resistance, it may be 3%, 5%, or 7% by mass or more. Furthermore, the content of copolymer (B) may be, for example, 50% by mass or less based on the total amount of copolymer (A) and copolymer (B), and from the viewpoint of suppressing softening of the resin, it may be 40%, 30%, 25%, or 20% by mass or less.

[0101] In the heat resistance imparting material of this embodiment, the total amount of copolymer (A) and copolymer (B) may be, for example, 80 mass% or more, 90 mass% or more, 95 mass% or more, 97 mass% or more, or 99 mass% or more, or may be 100 mass% based on the total amount of the heat resistance imparting material.

[0102] The heat resistance imparting material of this embodiment can be suitably used as an additive for imparting heat resistance to thermoplastic resins (particularly vinyl chloride resins).

[0103] The amount of the heat resistance imparting agent of this embodiment added may be, for example, 5 parts by mass or more relative to 100 parts by mass of the thermoplastic resin, and from the viewpoint of obtaining higher heat resistance, it may be 10 parts by mass or more, 20 parts by mass or more, 30 parts by mass or more, 40 parts by mass or more, or 50 parts by mass or more. The amount of the heat resistance imparting agent of this embodiment added may be, for example, 100 parts by mass or less relative to 100 parts by mass of the thermoplastic resin, and from the viewpoint of obtaining a better balance of the physical properties of heat resistance, impact resistance, and softness, it may be 90 parts by mass or less, 80 parts by mass or less, or 70 parts by mass or less.

[0104] The heat resistance imparting agent of this embodiment may be added to a thermoplastic resin as a premix of copolymer (A) and copolymer (B). Alternatively, the heat resistance imparting agent of this embodiment may be used by adding copolymer (A) and copolymer (B) simultaneously or separately to a thermoplastic resin.

[0105] (Resin composition) The resin composition of the present embodiment contains a thermoplastic resin and the heat resistance imparting agent described above.

[0106] It can also be said that the resin composition of the present embodiment contains a thermoplastic resin, the copolymer (A), and the copolymer (B).

[0107] The resin composition of the present embodiment may be produced by mixing a premix of the copolymer (A) and the copolymer (B) with a thermoplastic resin, or may be produced by simultaneously mixing the copolymer (A), the copolymer (B), and the thermoplastic resin.

[0108] Examples of thermoplastic resins include vinyl chloride resin, polyethylene resin, and ABS resin.

[0109] From the viewpoint of obtaining particularly remarkable effects of the heat resistance imparting material of this embodiment, the thermoplastic resin may be a vinyl chloride resin.

[0110] In the resin composition of this embodiment, the content of the heat resistance imparting material may be, for example, 5 parts by mass or more relative to 100 parts by mass of the thermoplastic resin, and from the viewpoint of obtaining higher heat resistance, it may be 10 parts by mass or more, 20 parts by mass or more, 30 parts by mass or more, 40 parts by mass or more, or 50 parts by mass or more. In addition, in the resin composition of this embodiment, the content of the heat resistance imparting material may be, for example, 100 parts by mass or less relative to 100 parts by mass of the thermoplastic resin, and from the viewpoint of obtaining a better balance of the physical properties of heat resistance, impact resistance, and softness, it may be 90 parts by mass or less, 80 parts by mass or less, or 70 parts by mass or less.

[0111] In the resin composition of this embodiment, the total amount of the thermoplastic resin and the heat resistance imparting material may be, for example, 60 mass% or more, 70 mass% or more, 80 mass% or more, or 85 mass% or more, or may be 100 mass% based on the total amount of the resin composition.

[0112] The resin composition of the present embodiment may further contain additives other than the heat resistance imparting agent. The additives may be appropriately selected from, for example, known additives added to thermoplastic resins.

[0113] Other additives include, for example, impact modifiers, stabilizers, fillers, and the like.

[0114] The impact modifier may be appropriately selected from known impact modifiers for thermoplastic resins, such as methyl methacrylate-butadiene-styrene copolymer (MBS resin), acrylonitrile-butadiene-styrene copolymer (ABS resin), and acrylic rubber.

[0115] In the resin composition of this embodiment, the content of other additives may be, for example, 40% by mass or less, 30% by mass or less, 20% by mass or less, or 15% by mass or less, based on the total amount of the resin composition. The content of other additives in the resin composition of this embodiment may be 0% by mass. When the resin composition of this embodiment contains other additives, the content of other additives may be, for example, 1% by mass or more, 3% by mass or more, or 5% by mass or more, based on the total amount of the resin composition.

[0116] The resin composition of the present embodiment may be molded into a molded article. The molding method is not particularly limited, and examples of the molding method include injection molding, extrusion molding, and blow molding.

[0117] The heat resistance of the resin composition of this embodiment can be evaluated, for example, by the Vicat softening temperature measured by the B50 method. The Vicat softening temperature (T1) of the resin composition of this embodiment is higher than the Vicat softening temperature (T0) of the thermoplastic resin. The difference (T1-T0) between the Vicat softening temperature (T1) of the resin composition and the Vicat softening temperature (T0) of the thermoplastic resin may be, for example, 2°C or more, 3°C or more, or 5°C or more.

[0118] Although the preferred embodiments of the present disclosure have been described above, the present disclosure is not limited to the above embodiments. [Example]

[0119] The present disclosure will be described in more detail below with reference to examples, but the present disclosure is not limited to these examples.

[0120] (Production Example 1: Production of Copolymer A-1) Copolymer A-1 was produced by the following method. A 120-liter autoclave equipped with a stirrer was charged with 77 parts by weight of styrene, 13 parts by weight of acrylonitrile, 1 part by weight of maleic anhydride, 0.2 parts by weight of 1,1-di(t-butylperoxy)cyclohexane, 0.4 parts by weight of α-methylstyrene dimer, and 15.4 parts by weight of methyl isobutyl ketone. The gas phase was purged with nitrogen gas, and the mixture was heated to 92°C over 40 minutes with stirring. After heating, a solution of 9 parts by weight of maleic anhydride and 0.5 parts by weight of t-butylperoxy-2-ethylhexanoate in 60 parts by weight of methyl isobutyl ketone was continuously added over 5.5 hours while maintaining the temperature at 96°C. After the addition was completed, the mixture was heated to 116°C and allowed to react for 1 hour to terminate the polymerization. Then, 9 parts by weight of aniline and 0.1 parts by weight of triethylamine were added to the polymerization solution, and the mixture was allowed to react for 6 hours at 140°C. After the reaction was completed, the imidization reaction solution was charged into a vent-type screw extruder, and the volatile matter was removed to obtain pellets of maleimide copolymer A-1.

[0121] The copolymer A-1 had a weight average molecular weight (Mw) of 94,000 and a glass transition temperature (Tg) of 131°C.

[0122] (Production Example 2: Production of Copolymer A-2) Copolymer A-2 was produced by the following method. A 120-liter autoclave equipped with a stirrer was charged with 74 parts by weight of styrene, 12 parts by weight of acrylonitrile, 2 parts by weight of maleic anhydride, 0.2 parts by weight of t-dodecyl mercaptan, and 33 parts by weight of methyl isobutyl ketone. The gas phase was then purged with nitrogen gas, and the mixture was heated to 92°C over 40 minutes with stirring. After the temperature was raised to 92°C, a solution of 13 parts by weight of maleic anhydride and 0.9 parts by weight of t-butylperoxy-2-ethylhexanoate in 84 parts by weight of methyl isobutyl ketone was continuously added over 6.5 hours while maintaining the temperature at 92°C. After the addition was completed, the mixture was heated to 116°C and allowed to react for 1 hour to terminate the polymerization. Subsequently, 13 parts by weight of aniline and 0.2 parts by weight of triethylamine were added to the polymerization solution and allowed to react for 6 hours at 140°C. After the reaction was completed, the imidization reaction solution was fed into a vented screw extruder, and the volatiles were removed to obtain pellets of maleimide copolymer A-2.

[0123] The copolymer A-2 had a weight average molecular weight (Mw) of 94,000 and a glass transition temperature (Tg) of 140°C.

[0124] (Production Example 3: Production of Copolymer A-3) Copolymer A-3 was produced by the following method. A 120-liter autoclave equipped with a stirrer was charged with 77 parts by weight of styrene, 9 parts by weight of acrylonitrile, 4 parts by weight of maleic anhydride, 0.45 parts by weight of α-methylstyrene dimer, and 38 parts by weight of methyl isobutyl ketone. The gas phase was then purged with nitrogen gas, and the mixture was heated to 92°C over 40 minutes with stirring. After the temperature was raised to 92°C, a solution of 9 parts by weight of maleic anhydride and 0.80 parts by weight of t-butylperoxy-2-ethylhexanoate in 47 parts by weight of methyl isobutyl ketone was continuously added over 5 hours while maintaining the temperature at 92°C. After the addition was completed, the mixture was heated to 116°C and allowed to react for 1 hour to terminate the polymerization. Subsequently, 13 parts by weight of aniline and 0.2 parts by weight of triethylamine were added to the polymerization solution and allowed to react for 15 hours at 140°C. After the reaction was completed, the imidization reaction solution was fed into a vented screw extruder, and the volatiles were removed to obtain pellets of maleimide copolymer A-3.

[0125] The copolymer A-3 had a weight average molecular weight (Mw) of 78,000 and a glass transition temperature (Tg) of 140°C.

[0126] (Production Example 4: Production of Copolymer A-4) Copolymer A-4 was produced by the following method. A 120-liter autoclave equipped with a stirrer was charged with 24 parts by weight of styrene, 23 parts by weight of acrylonitrile, 2 parts by weight of maleic anhydride, 0.1 parts by weight of t-butylperoxy-2-ethylhexanoate, 0.3 parts by weight of t-dodecyl mercaptan, and 35 parts by weight of methyl isobutyl ketone. The gas phase was then purged with nitrogen gas, and the mixture was heated to 92°C over 40 minutes with stirring. After the temperature was raised to 92°C, a solution of 39 parts by weight of styrene, 13 parts by weight of maleic anhydride, and 0.6 parts by weight of t-butylperoxy-2-ethylhexanoate in 82 parts by weight of methyl isobutyl ketone was continuously added over 6 hours while maintaining the temperature at 92°C. After the addition was completed, the mixture was heated to 116°C and allowed to react for 1 hour to complete the polymerization. Subsequently, 13 parts by weight of aniline and 0.2 parts by weight of triethylamine were added to the polymerization solution, and the mixture was allowed to react for 12 hours at 140°C. After the reaction was completed, the imidization reaction solution was charged into a vent-type screw extruder, and the volatile matter was removed to obtain pellets of maleimide copolymer A-4.

[0127] The copolymer A-4 had a weight average molecular weight (Mw) of 78,000 and a glass transition temperature (Tg) of 143°C.

[0128] (Production Example 5: Production of Copolymer X-1) Copolymer X-1 was produced by the following method. A 120-liter autoclave equipped with a stirrer was charged with 62 parts by weight of styrene, 5 parts by weight of maleic anhydride, 0.3 parts by weight of t-dodecyl mercaptan, and 92 parts by weight of methyl isobutyl ketone. The gas phase was then purged with nitrogen gas, and the mixture was heated to 92°C over 40 minutes with stirring. After the temperature was raised to 92°C, a solution of 33 parts by weight of maleic anhydride and 0.6 parts by weight of t-butylperoxy-2-ethylhexanoate in 200 parts by weight of methyl isobutyl ketone was continuously added over 5.5 hours while maintaining the temperature at 92°C. After the addition was completed, the mixture was heated to 116°C and allowed to react for 2 hours to terminate the polymerization. Subsequently, 34 parts by weight of aniline and 0.6 parts by weight of triethylamine were added to the polymerization solution and allowed to react for 12 hours at 140°C. After the reaction was completed, the imidization reaction solution was fed into a vented screw extruder, and the volatiles were removed to obtain pellets of maleimide copolymer X-1.

[0129] The copolymer X-1 had a weight average molecular weight (Mw) of 85,000 and a glass transition temperature (Tg) of 161°C.

[0130] (Production Example 6: Production of Copolymer X-2) Copolymer X-2 was produced by the following method. A 120-liter autoclave equipped with a stirrer was charged with 20 parts by weight of styrene, 30 parts by weight of acrylonitrile, 3 parts by weight of maleic anhydride, 0.3 parts by weight of t-dodecyl mercaptan, and 45 parts by weight of methyl isobutyl ketone. The gas phase was then purged with nitrogen gas, and the mixture was heated to 92°C over 40 minutes with stirring. After the temperature was raised to 92°C, a solution of 35 parts by weight of styrene, 12 parts by weight of maleic anhydride, and 0.6 parts by weight of t-butylperoxy-2-ethylhexanoate in 76 parts by weight of methyl isobutyl ketone was continuously added over 6 hours while maintaining the temperature at 92°C. After the addition was completed, the mixture was heated to 116°C and allowed to react for 1 hour to complete the polymerization. Subsequently, 13 parts by weight of aniline and 0.2 parts by weight of triethylamine were added to the polymerization solution, and the mixture was allowed to react for 12 hours at 140°C. After the reaction was completed, the imidization reaction solution was charged into a vent-type screw extruder, and the volatile matter was removed to obtain pellets of maleimide copolymer X-2.

[0131] The copolymer X-2 had a weight average molecular weight (Mw) of 82,000 and a glass transition temperature (Tg) of 144°C.

[0132] The compositions of the copolymers obtained in Production Examples 1 to 6 are shown in Table 1. In Table 1, NPMI indicates the content of N-phenylmaleimide units, St indicates the content of styrene units, AN indicates the content of acrylonitrile units, MAH indicates the content of maleic anhydride units, and AN / (St+AN) indicates the ratio of acrylonitrile units to the total of styrene units and acrylonitrile units.

[0133] [Table 1]

[0134] (Preparation of copolymer (B)) Copolymer B-1 was prepared as Modiper (registered trademark) A4400 (a graft copolymer having an ethylene-glycidyl methacrylate copolymer as the main chain and a styrene-acrylonitrile copolymer as the side chain). The copolymer B-1 had an ethylene unit content of 53% by mass, a glycidyl methacrylate unit content of 15% by mass, a styrene unit content of 25% by mass, and an acrylonitrile unit content of 7% by mass.

[0135] Furthermore, Modiper (registered trademark) A4300 (a graft copolymer having an ethylene-glycidyl methacrylate copolymer as the main chain and a butyl acrylate-methyl methacrylate copolymer as the side chain) was prepared as copolymer B-2. The copolymer B-2 contained 62% by mass of ethylene units, 17% by mass of glycidyl methacrylate units, 15% by mass of n-butyl acrylate units, and 6% by mass of methyl methacrylate units.

[0136] Furthermore, Bondfast (registered trademark) (ethylene-glycidyl methacrylate copolymer) was prepared as copolymer B-3.

[0137] Furthermore, a styrene-acrylonitrile copolymer (styrene unit 82% by mass, acrylonitrile unit 18% by mass, weight average molecular weight: 180,000) was prepared as copolymer Y-1.

[0138] Example 1 A resin composition was produced by the following method. Polyvinyl chloride resin (product name: TH-1000, manufactured by Taiyo Vinyl Corporation) to which a stabilizer and a lubricant had been added and mixed in a Henschel mixer was blended with copolymer A-1, copolymer B-1, and an impact modifier (Metablen (registered trademark) C-223A, MBS resin, manufactured by Mitsubishi Chemical Corporation) in the proportions shown in Table 2. Then, a roll sheet of the resin composition was prepared using a test roll (φ6×L15 test roll, manufactured by Kansai Roll Co., Ltd.). The roll sheets were stacked and press-molded, and test pieces were prepared by cutting or punching, and the physical properties of the resulting mixture were measured.

[0139] (Examples 2 to 13, Comparative Examples 1 to 7) Resin compositions were produced in the same manner as in Example 1, except that the blending amounts of each component were changed as shown in Table 2, Table 3, or Table 4.

[0140] The resin compositions obtained in Examples 1 to 13 and Comparative Examples 1 to 7 were evaluated by the following methods. The results are shown in Tables 2 to 4.

[0141] <Measurement of Vicat softening temperature> The Vicat softening temperature was measured using a 20 mm x 20 mm, 4 mm thick test piece according to the B50 method (load 50 N, heating rate 50°C / hour) in accordance with JIS K7206:1999. The measuring machine used was a HDT & VSPT tester manufactured by Toyo Seiki Seisakusho, Ltd.

[0142] <Charpy impact strength measurement> The Charpy impact strength was measured in accordance with JIS K-7111 using notched test pieces, with the impact direction being edgewise, under conditions of a relative humidity of 50% and an ambient temperature of 23°C. The measuring machine used was a digital impact tester manufactured by Toyo Seiki Seisakusho Co., Ltd.

[0143] <Measurement of flexural modulus> The flexural modulus was measured using rectangular test pieces punched out from 4.0 mm thick press-molded products at a rate of 2 mm / min in accordance with JIS K 7171. The measuring machine used was a 210X-3 universal testing machine manufactured by Intesco Corporation.

[0144] [Table 2]

[0145] [Table 3]

[0146] [Table 4]

[0147] In Tables 2 to 4, the unit of the amount of each component is "parts by mass." In addition, in Tables 2 to 4, "B / (A+B)" indicates the ratio (mass ratio) of copolymer (B) to the total of copolymer (A) and copolymer (B).

[0148] As shown in Tables 2 to 4, the resin compositions of Examples 1 to 13 had a viscosity of 7 kJ / m 2 The heat resistance additive of the present disclosure has a Charpy impact strength of 1800 MPa or more, a flexural modulus of 1800 MPa or more, and a Vicat softening temperature of 77°C or more. It has been confirmed that the heat resistance can be improved while adequately maintaining mechanical properties.

Claims

1. a copolymer (A) containing maleimide-based monomer units, aromatic vinyl-based monomer units, and vinyl cyanide-based monomer units; a copolymer (B) having a main chain containing an ethylene unit and containing at least one monomer unit (b) selected from the group consisting of a vinyl cyanide-based monomer unit and an unsaturated carboxylic acid ester-based monomer unit; Including, the copolymer (A) contains the maleimide-based monomer units in an amount of 5 to 30% by mass, and the total amount of the aromatic vinyl-based monomer units and the vinyl cyanide-based monomer units in an amount of 65 to 90% by mass; In the copolymer (A), the proportion of the vinyl cyanide-based monomer units to the total of the aromatic vinyl-based monomer units and the vinyl cyanide-based monomer units is 5 to 30 mass%. Heat resistance material.

2. The heat resistance imparting material according to claim 1 , wherein the copolymer (B) has the main chain and a side chain containing the monomer unit (b).

3. The heat resistance imparting material according to claim 2 , wherein the side chain further contains an aromatic vinyl monomer unit.

4. The heat resistance imparting material according to claim 1 , wherein the main chain further comprises a monomer unit (i) having an epoxy group.

5. 2. The heat resistance imparting material according to claim 1, wherein the content of the copolymer (B) is 1 to 50 mass% based on the total amount of the copolymer (A) and the copolymer (B).

6. 2. The heat resistance imparting material according to claim 1, wherein the copolymer (A) further contains 0.1 to 10% by mass of an unsaturated dicarboxylic acid monomer unit.

7. The heat resistance imparting agent according to claim 1, which is for use in thermoplastic resins.

8. 2. The heat resistance imparting material according to claim 1, which is for use in vinyl chloride resin.

9. A thermoplastic resin, The heat resistance imparting material according to any one of claims 1 to 8, A resin composition comprising:

10. The resin composition according to claim 9, wherein the thermoplastic resin is a vinyl chloride resin.

11. The resin composition according to claim 9, wherein the content of the heat resistance imparting material is 10 to 100 parts by mass relative to 100 parts by mass of the thermoplastic resin.

Images