CN115443294A - Maleimide copolymer, and chlorine-containing polymer resin composition containing maleimide copolymer and chlorine-containing polymer - Google Patents

Maleimide copolymer, and chlorine-containing polymer resin composition containing maleimide copolymer and chlorine-containing polymer Download PDF

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CN115443294A
CN115443294A CN202180029305.3A CN202180029305A CN115443294A CN 115443294 A CN115443294 A CN 115443294A CN 202180029305 A CN202180029305 A CN 202180029305A CN 115443294 A CN115443294 A CN 115443294A
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mass
maleimide
chlorine
containing polymer
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松原达宏
西野广平
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Denka Co Ltd
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Denka Co Ltd
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    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F212/00Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring
    • C08F212/02Monomers containing only one unsaturated aliphatic radical
    • C08F212/04Monomers containing only one unsaturated aliphatic radical containing one ring
    • C08F212/06Hydrocarbons
    • C08F212/08Styrene
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F220/00Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
    • C08F220/02Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
    • C08F220/42Nitriles
    • C08F220/44Acrylonitrile
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F222/00Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a carboxyl radical and containing at least one other carboxyl radical in the molecule; Salts, anhydrides, esters, amides, imides, or nitriles thereof
    • C08F222/04Anhydrides, e.g. cyclic anhydrides
    • C08F222/06Maleic anhydride
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F222/00Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a carboxyl radical and containing at least one other carboxyl radical in the molecule; Salts, anhydrides, esters, amides, imides, or nitriles thereof
    • C08F222/36Amides or imides
    • C08F222/40Imides, e.g. cyclic imides
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L25/00Compositions of, homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Compositions of derivatives of such polymers
    • C08L25/02Homopolymers or copolymers of hydrocarbons
    • C08L25/04Homopolymers or copolymers of styrene
    • C08L25/08Copolymers of styrene
    • C08L25/12Copolymers of styrene with unsaturated nitriles
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L27/00Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
    • C08L27/02Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L27/04Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
    • C08L27/06Homopolymers or copolymers of vinyl chloride

Abstract

The invention provides a maleimide copolymer capable of obtaining a chlorine-containing polymer resin composition which can improve the heat resistance of a chlorine-containing polymer and inhibit coloring, and a chlorine-containing polymer resin composition containing the maleimide copolymer and the chlorine-containing polymer, and a formed body thereof. The present invention provides a maleimide-based copolymer for chlorine-containing polymers, wherein the maleimide-based copolymer for chlorine-containing polymers contains 40 to 90 mass% of an aromatic vinyl monomer unit, 0.5 to 30 mass% of a vinyl cyanide monomer unit, 0 to 10 mass% of an unsaturated acid anhydride monomer unit, and 5 to 30 mass% of a maleimide monomer unit, and has a melt viscosity of 200 to 100000 Pa.sec as measured at 190 ℃ and a shear rate of 100/sec, where the total amount of the aromatic vinyl monomer unit, vinyl cyanide monomer unit, unsaturated acid anhydride monomer unit, and maleimide monomer unit is 100 mass%.

Description

Maleimide copolymer, and chlorine-containing polymer resin composition containing maleimide copolymer and chlorine-containing polymer
Technical Field
The present invention relates to a maleimide copolymer and a chlorine-containing polymer resin composition containing the maleimide copolymer and a chlorine-containing polymer.
Background
Chlorine-containing polymer resins are inexpensive and have excellent chemical, physical and mechanical properties, and are used in large quantities for various applications.
However, chlorine-containing polymers have the disadvantage of lacking heat resistance (heat softening temperature), for example when the heat resistance is measured by JIS K7206: the Vicat softening temperature measured by the 50 method (load 50N, temperature rise rate 50 ℃/hr) in 1999 is about 82 ℃, and when a stabilizer and a plasticizer are incorporated in usual molding, the softening temperature is further lowered.
As a method for improving heat resistance of chlorine-containing polymer resins, a method of mixing a heat-resistant resin with a chlorine-containing polymer is known (for example, patent documents 1 and 2).
Documents of the prior art
Patent document
Patent document 1: japanese patent No. 06475501
Patent document 2: japanese patent laid-open No. 2006-265373
Disclosure of Invention
Problems to be solved by the invention
The invention provides a maleimide copolymer which can obtain a chlorine-containing polymer resin composition with improved heat resistance and inhibited coloring of chlorine-containing polymers, a chlorine-containing polymer resin composition containing the maleimide copolymer and the chlorine-containing polymers, and a formed body thereof.
Means for solving the problems
The present inventors have found, based on the results of their studies, that a maleimide-based copolymer having a specific monomer unit composition, a specific range of melt viscosity, and a low level of yellowness can be suppressed. The chlorine-containing polymer can be imparted with heat resistance and the occurrence of coloration in the resin composition and the molded article thereof can be suppressed.
The invention is as follows:
(1): a maleimide-based copolymer for chlorine-containing polymers, wherein the maleimide-based copolymer for chlorine-containing polymers comprises 40 to 90 mass% of an aromatic vinyl monomer unit, 0.5 to 30 mass% of a vinyl cyanide monomer unit, 0 to 10 mass% of an unsaturated acid anhydride monomer unit and 5 to 30 mass% of a maleimide monomer unit, based on 100 mass% of the total amount of the aromatic vinyl monomer unit, vinyl cyanide monomer unit, unsaturated acid anhydride monomer unit and maleimide monomer unit, and has a melt viscosity of 200 to 100000 Pa-sec as measured at 190 ℃ at a shear rate of 100/sec.
(2): a chlorine-containing polymer resin composition comprising 5 to 50% by mass of the maleimide copolymer of (1) and 50 to 95% by mass of a chlorine-containing polymer.
(3): (2) The chlorine-containing polymer resin composition, wherein the melt viscosity is 200 to 70000Pa sec.
(4): (2) The chlorine-containing polymer resin composition according to (1) or (3), wherein the maleimide copolymer contains 50 to 80% by mass of an aromatic vinyl monomer unit.
(5): (2) The chlorine-containing polymer resin composition according to any one of (1) to (4), wherein the maleimide copolymer contains 5 to 25% by mass of vinyl cyanide monomer units.
(6): (2) The chlorine-containing polymer resin composition according to any one of (1) to (5), wherein the maleimide copolymer contains an unsaturated acid anhydride monomer unit in an amount of 0.3 to 5% by mass.
(7): (2) The chlorine-containing polymer resin composition according to any one of (1) to (6), wherein the maleimide-based copolymer contains 5 to 25% by mass of maleimide-based monomer units.
(8): (2) The chlorine-containing polymer resin composition according to any one of (1) to (7), wherein the maleimide monomer unit is an N-arylmaleimide monomer unit.
(9): a molded article obtained by molding the chlorine-containing polymer resin composition according to any one of (2) to (8).
ADVANTAGEOUS EFFECTS OF INVENTION
The maleimide-based copolymer of the present invention can impart heat resistance to the chlorine-containing polymer and can suppress coloration of the resin composition and the molded article thereof. Therefore, the present invention is suitable for applications requiring heat resistance and requiring good appearance.
Detailed Description
< description of wording >
The meaning of "a to B" described in the specification of the present application means: a is not less than A and not more than B.
The following description will explain embodiments of the present invention in detail. The embodiments may be combined with each other.
(1. Monomer units contained in the maleimide-based copolymer)
The maleimide copolymer of the present invention comprises: an aromatic vinyl monomer unit, a vinyl cyanide monomer unit, an unsaturated acid anhydride monomer unit, and a maleimide monomer unit. The monomer units contained in the maleimide-based copolymer will be described below.
(1-1. Aromatic vinyl monomer unit)
Examples of the aromatic vinyl monomer that can be used in the maleimide-based copolymer according to the present invention include styrene, o-methylstyrene, m-methylstyrene, p-methylstyrene, 2,4-dimethylstyrene, ethylstyrene, p-tert-butylstyrene, α -methylstyrene, α -methyl-p-methylstyrene, and the like. Among them, styrene having a good effect of improving the hue is preferable. The styrene-based monomers may be used alone or in combination of 2 or more.
The maleimide-based copolymer according to the present invention contains 40 to 90% by mass of the aromatic vinyl monomer unit, preferably 50 to 80% by mass, more preferably 60 to 70% by mass, based on 100% by mass of the total amount of the aromatic vinyl monomer unit, the vinyl cyanide monomer unit, the unsaturated acid anhydride monomer unit and the maleimide-based monomer unit. The content thereof may specifically be 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, or 90 mass%, and may be within a range of 2 arbitrary out of the numerical values exemplified herein. When the amount of the aromatic vinyl monomer unit is less than 40% by mass, the other monomer components contained in the maleimide-based copolymer are relatively increased, and as a result, the maleimide-based copolymer and the chlorine-containing polymer may not be kneaded without melting, or the Yellowing Index (YI) of the maleimide-based copolymer may become high, whereby the chlorine-containing polymer resin composition and the molded article thereof may be colored, and when it exceeds 90% by mass, the heat resistance of the chlorine-containing polymer resin composition may not be sufficiently improved.
(1-2. Vinyl cyanide monomer units)
Examples of the vinyl cyanide monomer unit that can be used in the maleimide-based copolymer according to the present invention include acrylonitrile, methacrylonitrile, ethacrylonitrile, fumaronitrile, and the like. Among them, acrylonitrile is preferable from the viewpoint of hue and heat resistance to the chlorine-containing polymer resin composition. The vinyl cyanide monomers may be used alone or in combination of 2 or more.
The maleimide-based copolymer according to the present invention contains the vinyl cyanide monomer unit in an amount of 0.5 to 30% by mass, preferably 5 to 25% by mass, more preferably 5 to 20% by mass, based on 100% by mass of the total amount of the aromatic vinyl monomer unit, vinyl cyanide monomer unit, unsaturated acid anhydride monomer unit and maleimide-based monomer unit. The content thereof may be specifically 0.5, 1, 5, 10, 15, 20, 25, or 30% by mass, or may be within a range of 2 arbitrary out of the numerical values exemplified here. When the amount of the vinyl cyanide monomer units is less than 0.5% by mass, the heat resistance of the chlorine-containing polymer resin composition may not be sufficiently improved, and when it exceeds 30% by mass, the Yellowness (YI) of the maleimide-based copolymer may become high.
(1-3. Unsaturated acid anhydride monomer Unit)
Examples of the unsaturated acid anhydride monomer unit usable in the maleimide-based copolymer according to the present invention include maleic anhydride, itaconic anhydride, citraconic anhydride, and aconitic anhydride. Among these, maleic anhydride is preferable from the viewpoint of imparting heat resistance to the chlorine-containing polymer resin composition. The unsaturated acid anhydride monomer units may be used alone or in combination of 2 or more.
The maleimide-based copolymer according to the present invention contains the unsaturated acid anhydride monomer unit in an amount of 0 to 10% by mass, preferably 0.3 to 5% by mass, more preferably 0.5 to 5% by mass, based on 100% by mass of the total amount of the aromatic vinyl monomer unit, the vinyl cyanide monomer unit, the unsaturated acid anhydride monomer unit and the maleimide-based monomer unit. The content thereof may specifically be 0, 0.5, 0.6, 0.7, 0.8, 0.9, 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10% by mass, and may be within a range of any 2 of the numerical values exemplified herein. When the amount of the unsaturated acid anhydride monomer unit exceeds 10% by mass, the fluidity is lowered, and the kneadability with the chlorine-containing polymer may be lowered.
(1-4. Maleimide monomer units)
Examples of the maleimide monomer unit that can be used in the maleimide copolymer of the present invention include N-alkylmaleimides such as N-methylmaleimide, N-butylmaleimide and N-cyclohexylmaleimide, and N-arylmaleimides such as N-phenylmaleimide, N-chlorophenylmaleimide, N-methylphenylmaleimide, N-methoxyphenylmaleimide and N-tribromophenylmaleimide. Among them, from the viewpoint of imparting heat resistance to the chlorine-containing polymer resin composition, N-arylmaleimide is preferable, and N-phenylmaleimide is more preferable. The maleimide monomer may be used alone or in combination of 2 or more.
In order to incorporate the maleimide-based copolymer with the maleimide monomer unit, for example, a copolymer obtained by copolymerizing a raw material comprising an unsaturated dicarboxylic acid monomer unit with another monomer with ammonia or a primary amine may be imidized, or a raw material comprising a maleimide monomer may be copolymerized with another monomer.
The maleimide-based copolymer according to the present invention contains 5 to 30% by mass of the maleimide-based monomer unit, preferably 5 to 25% by mass, more preferably 5% by mass or more and less than 25% by mass, and still more preferably 10 to 24% by mass, based on 100% by mass of the total of the aromatic vinyl-based monomer unit, the vinyl cyanide-based monomer unit, the unsaturated acid anhydride monomer unit, and the maleimide-based monomer unit. Specifically, the content may be 5, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, or 30% by mass, or may be within a range between any 2 of the numerical values exemplified herein. When the amount of the maleimide-based monomer unit is less than 5% by mass, the heat resistance of the chlorine-containing polymer resin composition may not be sufficiently improved, and when it exceeds 30% by mass, the maleimide-based copolymer and the chlorine-containing polymer may not be melted and kneaded.
(1-5. Copolymerizable monomer)
The maleimide-based copolymer of the present invention may be obtained by copolymerizing a copolymerizable monomer other than the aromatic vinyl monomer, the vinyl cyanide monomer, the unsaturated acid anhydride monomer unit and the maleimide monomer, within a range not to impair the effects of the present invention. Examples of the monomer copolymerizable with the maleimide-based copolymer include acrylic acid ester monomers such as methyl acrylate, ethyl acrylate and butyl acrylate, methacrylic acid ester monomers such as methyl methacrylate and ethyl methacrylate, vinyl carboxylic acid monomers such as acrylic acid and methacrylic acid, acrylic acid amide and methacrylic acid amide. The monomer copolymerizable with the maleimide-based copolymer may be used alone or in combination of 2 or more.
Although the monomer is copolymerizable within the range not inhibiting the effect of the present invention, the content thereof is preferably 20% by mass or less, more preferably 10% by mass or less, from the viewpoint of imparting heat resistance to the chlorine-containing polymer resin composition.
(1-6. Additives)
After completion of the polymerization, additives such as heat-resistant stabilizers including hindered phenol compounds, lactone compounds, phosphorus compounds, and sulfur compounds, light stabilizers including hindered amine compounds and benzotriazole compounds, lubricants, plasticizers, colorants, antistatic agents, and mineral oils may be added to the polymerization solution as necessary. The amount added is preferably less than 0.2 part by mass per 100 parts by mass of the whole monomer unit. The additives may be used alone or in combination of 2 or more.
(2. Properties of maleimide copolymer)
(2-1. Melt viscosity of Maleimide copolymer)
The melt viscosity of the maleimide-based copolymer of the present invention is 200 to 100000 Pa.sec, preferably 200 to 70000 Pa.sec, and more preferably 500 to 70000 Pa.sec. Specifically, it may be 200, 500, 1000, 2000, 3000, 4000, 5000, 6000, 7000, 8000, 9000, 10000, 20000, 30000, 40000, 50000, or 100000Pa · sec, or may be within a range of 2 of any of the numerical values exemplified here. When the pressure is less than 200Pa sec, the heat resistance of the chlorine-containing polymer resin composition may not be sufficiently improved, and when the pressure exceeds 100000Pa sec, the maleimide-based copolymer and the chlorine-containing polymer of the mixed resin may not be melt-kneaded.
The melt viscosity was measured by using a capillary rheometer 1D manufactured by toyoyo seiko corporation and a capillary die with L =40mm and D =1 mm.
The melt viscosity of the maleimide-based copolymer can be adjusted by adjusting the mixing ratio of the monomer units constituting the maleimide-based copolymer. For example, the melt viscosity can be increased by increasing the content of the vinyl cyanide monomer unit in the maleimide-based copolymer or increasing the content of the maleimide-based monomer unit in the maleimide-based copolymer. Further, the melt viscosity can be increased by increasing the weight average molecular weight of the maleimide-based copolymer. These adjustment methods may be used in combination. (2-2. Weight-average molecular weight of maleimide copolymer)
The weight average molecular weight of the maleimide-based copolymer of the present invention is 2.5 to 12 ten thousand, preferably 5 to 10 ten thousand. Specifically, it may be 2.5, 3, 4, 5, 6, 7, 8, 9, 10, 11, or 12 ten thousand, or may be within a range of 2 arbitrary values among the numerical values exemplified here. When the weight average molecular weight is less than 2.5 ten thousand, the heat resistance of the chlorine-containing polymer resin composition may not be sufficiently improved, and when it exceeds 12 ten thousand, the fluidity may be lowered.
The weight average molecular weight is a value in terms of polystyrene measured by Gel Permeation Chromatography (GPC), and can be measured under the following conditions.
Measurement name: SYSTEM-21Shodex (manufactured by Showa Denko K.K.)
And (3) chromatographic column: 3 PL gel MIXED-B (manufactured by Polymer Laboratories) were used in series
Temperature: 40 deg.C
The detection mode is as follows: differential refractive index
Solvent: tetrahydrofuran (THF)
Temperature: 2% by mass
And (3) correcting a curve: drawn using a standard Polystyrene (PS) (manufactured by Polymer Laboratories, inc.)
As a method for obtaining a maleimide-based copolymer having a preferred weight average molecular weight (Mw) in the range of 2.5 to 12 ten thousand, there can be mentioned a method of adjusting the polymerization temperature, polymerization time and amount of a polymerization initiator to be added, and a method of adjusting the amount of a solvent to be added and the amount of a chain transfer agent to be added. In addition, a method of reducing the molecular weight of the resulting copolymer by decomposing it is also known.
(3. Preparation of Maleimide copolymer)
The polymerization method of the maleimide-based copolymer is, for example, solution polymerization, bulk polymerization, or the like. Solution polymerization is preferable from the viewpoint of obtaining a maleimide copolymer having a uniform copolymerization component by polymerizing the maleimide copolymer while adding the maleimide copolymer in portions. The solvent for solution polymerization is preferably a non-copolymerizable solvent from the viewpoint of less generation of by-products and less adverse effects. Examples thereof include ketones such as acetone, methyl ethyl ketone, methyl isobutyl ketone and acetophenone, ethers such as tetrahydrofuran and 1,4-dioxane, aromatic hydrocarbons such as benzene, toluene, xylene and chlorobenzene, N-dimethylformamide, dimethyl acetone and N-methyl-2-pyrrolidone, among which methyl ethyl ketone and methyl isobutyl ketone are preferable from the viewpoint of ease of solvent removal in the recovery of the maleimide-based copolymer by devolatilization. The polymerization process may be arbitrarily selected from a continuous polymerization type, a batch type (batch type), and a semi-batch type.
The method for producing the maleimide copolymer is not particularly limited, but it is preferably a method capable of radical polymerization, and the polymerization temperature is preferably in the range of 80 to 150 ℃. The polymerization initiator is not particularly limited, and for example, known azo compounds such as azobisisobutyronitrile, azobiscyclohexanecarbonitrile, azobismethylpropionitrile and azobismethylbutyronitrile, benzoyl peroxide, t-butyl peroxybenzoate, 1,1-bis (t-butylperoxy) -3,3,5-trimethylcyclohexane, t-butyl peroxymonocarboxylate, t-butyl peroxy2-ethylhexanoate, di-t-butyl peroxide, dicumyl peroxide, ethyl-3,3-ethyl di- (t-butylperoxy) butyrate, and known organic peroxides such as 1 kind of the above-mentioned compounds or a combination of 2 or more kinds of the above-mentioned compounds can be used. From the viewpoint of the reaction rate of the polymerization or the control of the polymerization rate, it is preferable to use an azo compound or an organic peroxide having a half-life of 10 hours at 70 to 120 ℃. The amount of the polymerization initiator used is not particularly limited, but is preferably 0.1 to 1.5% by mass, more preferably 0.1 to 1.0% by mass, based on 100% by mass of the whole monomer units. The amount of the polymerization initiator used is preferably 0.1% by mass or more because a sufficient polymerization rate can be obtained. When the amount of the polymerization initiator used is 1.5% by mass or less, the polymerization rate can be suppressed to facilitate control of the reaction, and the target molecular weight can be easily obtained.
A chain transfer agent can be used for the production of the maleimide-based copolymer. The chain transfer agent to be used is not particularly limited, and examples thereof include n-octyl mercaptan, n-dodecyl mercaptan, t-dodecyl mercaptan, α -methylstyrene dimer, ethyl thioglycolate, limonene, terpinene and the like. The amount of the chain transfer agent to be used is not particularly limited as long as it is within a range in which the target molecular weight can be obtained, but is preferably 0.01 to 0.8% by mass, more preferably 0.1 to 0.5% by mass, based on 100% by mass of the whole monomer units. When the amount of the chain transfer agent used is 0.01 to 0.8% by mass, the target molecular weight can be easily obtained.
As a method for introducing the maleimide monomer unit of the maleimide-based copolymer, there can be used a method of copolymerizing a maleimide monomer, an aromatic vinyl monomer and a vinyl cyanide monomer (direct method), or a method of copolymerizing an unsaturated dicarboxylic anhydride, an aromatic vinyl monomer and a vinyl cyanide monomer in advance and then reacting the unsaturated dicarboxylic anhydride group with ammonia or a primary amine to convert the unsaturated dicarboxylic anhydride group into a maleimide monomer unit (post-imidization method). The post-imidization method is preferred because the amount of the maleimide-based monomer remaining in the copolymer is small.
Examples of the primary amine used in the post-imidization method include alkylamines such as methylamine, ethylamine, n-propylamine, isopropylamine, n-butylamine, n-pentylamine, n-hexylamine, n-octylamine, cyclohexylamine, and decylamine, and aromatic amines such as chlorine-or bromine-substituted alkylamine, aniline, toluidine, and naphthylamine, and among them, aniline and cyclohexylamine are preferable. These primary amines may be used alone, or 2 or more kinds thereof may be used in combination. The amount of the primary amine to be added is not particularly limited, but is preferably 0.7 to 1.1 molar equivalents, and more preferably 0.85 to 1.05 molar equivalents, relative to the unsaturated dicarboxylic anhydride group. It is preferable that the molar equivalent of the monomer unit is 0.7 or more relative to the unsaturated dicarboxylic anhydride monomer unit in the maleimide copolymer, because the thermal stability is good. When the amount is 1.1 molar equivalent or less, the amount of the primary amine remaining in the maleimide-based copolymer decreases, and therefore, it is preferable.
When a maleimide monomer unit is introduced using a post-imidization method, a catalyst may be used. The catalyst can improve the dehydration ring-closing reaction in the reaction of ammonia or primary amine with unsaturated dicarboxylic anhydride group, especially in the reaction of converting unsaturated dicarboxylic anhydride group into maleimide group. The kind of the catalyst is not particularly limited, but tertiary amines can be used. The tertiary amine is not particularly limited, but examples thereof include trimethylamine, triethylamine, tripropylamine, tributylamine, N, N-dimethylaniline and N, N-diethylaniline. The amount of the tertiary amine added is preferably not less than 0.01 molar equivalent to the unsaturated dicarboxylic anhydride group, although not particularly limited. The temperature of the imidization reaction in the present invention is preferably 100 to 250 ℃. More preferably 120 to 200 ℃. When the temperature of the imidization reaction is 100 ℃ or higher, the reaction rate is sufficiently high, and it is preferable from the viewpoint of productivity. It is preferable that the temperature of the imidization reaction is 250 ℃ or lower because the deterioration of the physical properties due to the thermal deterioration of the maleimide-based copolymer can be suppressed.
As a method for removing volatile components such as a solvent used in the solution polymerization and unreacted monomers from the solution after the completion of the solution polymerization or the solution after the completion of the post-imidization of the maleimide-based copolymer (devolatilization method), a known method can be used. For example, a vacuum devolatilization tank with a heater or a devolatilization extruder with an exhaust port may be used. The devolatilized maleimide-based copolymer in a molten state may be transferred to a pelletizing step, extruded from a porous die into strands, and then processed into pellets by a cold cutting method, an in-air hot cutting method, an underwater hot cutting method, or the like.
When the chlorine-containing polymer is in the form of a powder, the maleimide-based copolymer of the present invention is preferably also pulverized into a powder before use. The pulverization method is not particularly limited, and a known pulverization technique can be used. Suitable crushing devices include turbine mill crushers, turbine disc mill crushers, turbine cutter crushers, jet mill crushers, impact crushers, hammer crushers, vibratory crushers, and the like.
(4. Chlorine-containing Polymer)
The chlorine-containing polymer in the present invention is a polymer obtained by polymerizing vinyl chloride alone or a mixture of vinyl chloride and 1 or more monomers copolymerizable therewith, and a chlorine addition polymer obtained by further adding chlorine element to the polymer thus obtained. The chlorine-containing polymer may further contain a compound of the polymer thus obtained and a chlorine addition polymer. Examples of the copolymerizable monomer include vinyl esters such as vinyl acetate and vinyl propionate, acrylic esters such as methyl acrylate and butyl acrylate, methacrylic esters such as methyl methacrylate and ethyl methacrylate, fumaric esters such as butyl malate and diethyl malate, vinyl ethers such as vinyl methyl ether, vinyl butyl ether and vinyl octyl ether, vinyl cyanides such as acrylonitrile and methacrylonitrile, α -olefins such as ethylene and propylene, styrenes such as styrene, α -methylstyrene, vinyl toluene, t-butyl styrene and chlorostyrene and their substitutes, and phthalic acid esters such as vinylidene halides other than vinylidene chloride and vinyl halides and diallyl phthalate.
The chlorine-containing polymer is preferably polyvinyl chloride obtained by polymerizing vinyl chloride, from the viewpoint of affinity with the maleimide-based copolymer.
The average polymerization degree of the chlorine-containing polymer is 680 to 1900, preferably 700 to 1700. When the average polymerization degree is 680 or more, the maleimide-based copolymer is uniformly dispersed, and when it is 1900 or less, the kneading property with the maleimide-based copolymer is excellent.
(4-1. Production of chlorine-containing Polymer)
The method of polymerization of the chlorine-containing polymer is not particularly limited, and may be conventionally known bulk polymerization, solution polymerization, emulsion polymerization, or the like.
(5. Chlorine-containing polymer resin composition comprising maleimide copolymer and chlorine-containing polymer)
The blending ratio of the maleimide-based copolymer and the chlorine-containing polymer in the present invention is preferably 5 to 50% by mass of the maleimide-based copolymer and 50 to 95% by mass of the chlorine-containing polymer, more preferably 5 to 30% by mass of the maleimide-based copolymer and 70 to 95% by mass of the chlorine-containing polymer. When the blending ratio of the maleimide copolymer is adjusted to 5% by mass or more, a sufficient heat resistance-imparting effect can be obtained, and when the blending ratio is adjusted to 50% by mass or less, the deterioration of releasability at the time of kneading can be suppressed. (5-1. Additive for chlorine-containing polymer resin composition)
The chlorine-containing polymer resin composition of the present invention may contain an additive as described below, and may actually be an additive composed of a maleimide-based copolymer and a chlorine-containing polymer, within a range not affecting the effect of the present invention.
If necessary, a reinforcing agent, a processability improver, a heat stabilizer, a lubricant, a plasticizer, or the like may be further added singly or in combination to the chlorine-containing polymer resin composition of the present invention.
As other additives, light stabilizers, ultraviolet absorbers, antioxidants, pigments, dyes, and the like may be optionally added.
(5-2. Production of chlorine-containing Polymer resin composition)
The method for obtaining the chlorine-containing polymer resin composition of the present invention by kneading and mixing the maleimide copolymer and the chlorine-containing polymer is not particularly limited, and a known melt kneading technique can be used. Suitable melt-kneading apparatuses include screw extruders such as single-screw extruders, intermeshing type co-rotating or intermeshing type counter-rotating biaxial extruders, non-intermeshing or incomplete intermeshing type biaxial extruders, banbury mixers, pipe extruders, and mixing rolls. Further, a plurality of these extruders may be used in combination.
The chlorine-containing polymer resin composition can be molded by a known method. Examples thereof include injection molding, sheet extrusion molding, vacuum molding, blow molding, foam molding, profile extrusion molding, and the like. In molding, the chlorine-containing polymer resin composition is usually heated to 170 to 200 ℃ and then processed, and 190 to 200 ℃ is preferred. The formed product can be used for gutters, air-conditioning pipeline covers, factory pipelines, pipes, joints, sprinkler pipelines, window frames, industrial products and the like.
Examples
The following examples are given to illustrate details of the present invention, and the present invention is not limited to the following examples.
< preparation example of Maleimide-based copolymer (A-1) >
73 parts by mass of styrene, 18 parts by mass of acrylonitrile, 1 part by mass of maleic anhydride, 0.22 part by mass of alpha-methylstyrene dimer, and 26 parts by mass of methyl ethyl ketone were charged into an autoclave having a capacity of about 120 liters equipped with a stirrer, and after the gas phase portion was replaced with nitrogen, the temperature was raised to 92 ℃ over 40 minutes while stirring. After the temperature was raised, the mixture was kept at 92 ℃ and a solution prepared by dissolving 7 parts by mass of maleic anhydride and 1.0 part by mass of t-butyl peroxide-2-ethylhexanoate in 35 parts by mass of methyl ethyl ketone was continuously added over 4.5 hours. After the addition, the temperature was raised to 120 ℃ to complete the polymerization within 1 hour. Subsequently, 6 parts by mass of aniline and 0.1 part by mass of triethylamine were added to the polymerization solution, and the mixture was reacted at 140 ℃ for 7 hours. The imidization reaction solution after the completion of the reaction was fed into a vented screw extruder, and volatile components were removed to obtain a granular maleimide-based copolymer A-1. The analysis results of the obtained maleimide-based copolymer are shown in Table 1. In tables 1 and 2, sty is a styrene monomer unit, AN is AN acrylonitrile monomer unit, MAH is a maleic anhydride monomer unit, NPMI is AN N-phenylmaleimide monomer unit, and PVC is polyvinyl chloride.
< preparation example of Maleimide-based copolymer (A-2) >
64 parts by mass of styrene, 20 parts by mass of acrylonitrile, 2 parts by mass of maleic anhydride, 0.5 part by mass of alpha-methylstyrene dimer, and 31 parts by mass of methyl ethyl ketone were charged in an autoclave having a capacity of about 120 liters equipped with a stirrer, the gas phase part was replaced with nitrogen, and then the temperature was raised to 92 ℃ over 40 minutes while stirring. After the temperature was raised, the mixture was kept at 92 ℃ for 5.5 hours, and a solution prepared by dissolving 14 parts by mass of maleic anhydride and 0.60 part by mass of t-butyl peroxy-2-ethylhexanoate in 69 parts by mass of methyl ethyl ketone was continuously added. After the addition, the temperature was raised to 120 ℃ to complete the polymerization within 1 hour. Subsequently, 12 parts by mass of aniline and 0.2 parts by mass of triethylamine were added to the polymerization solution, and the mixture was reacted at 140 ℃ for 7 hours. The imidization reaction solution after the completion of the reaction was fed into a vented screw extruder, and volatile components were removed to obtain a granular maleimide-based copolymer A-2. The analysis results of the obtained maleimide-based copolymer are shown in Table 1.
< preparation example of Maleimide-based copolymer (A-3) >
27 parts by mass of styrene, 33 parts by mass of acrylonitrile, 2 parts by mass of maleic anhydride, 0.17 part by mass of α -methylstyrene dimer, and 24 parts by mass of methyl ethyl ketone were charged into an autoclave having a capacity of about 120 liters equipped with a stirrer, and after the gas phase portion was replaced with nitrogen, the temperature was raised to 92 ℃ over 40 minutes under stirring. After raising the temperature, the temperature was maintained at 92 ℃ and a solution of 31 parts by mass of styrene, 7 parts by mass of maleic anhydride, and 0.38 part by mass of t-butyl peroxy-2-ethylhexanoate dissolved in 37 parts by mass of methyl ethyl ketone was continuously added over 3.5 hours. Then, after the addition of further maleic anhydride was completed, a solution of 0.22 parts by mass of t-butyl peroxy-2-ethylhexanoate dissolved in 2 parts by mass of methyl ethyl ketone was continuously added over 2 hours. After the addition, the temperature was raised to 120 ℃ to complete the polymerization within 1 hour. Subsequently, 6 parts by mass of aniline and 0.1 part by mass of triethylamine were further added to the polymerization solution, and the mixture was reacted at 140 ℃ for 7 hours. The imidization reaction solution after the completion of the reaction was fed into a vented screw extruder, and volatile components were removed to obtain a granular maleimide-based copolymer A-3. The analysis results of the obtained maleimide-based copolymer are shown in Table 1.
< preparation example of Maleimide-based copolymer (A-4) >
79 parts by mass of styrene, 9 parts by mass of acrylonitrile, 2 parts by mass of maleic anhydride, 0.52 parts by mass of alpha-methylstyrene dimer, and 33 parts by mass of methyl ethyl ketone were charged into an autoclave having a capacity of about 120 liters equipped with a stirrer, and after the gas phase portion was replaced with nitrogen, the temperature was raised to 92 ℃ over 40 minutes while stirring. After the temperature rise, the mixture was maintained at 92 ℃ for 5 hours, and a solution of 9 parts by mass of maleic anhydride and 0.60 part by mass of t-butyl peroxy-2-ethylhexanoate dissolved in 47 parts by mass of methyl ethyl ketone was continuously added. After the addition was completed, the temperature was raised to 120 ℃ to complete the polymerization within 1.5 hours. Subsequently, 9 parts by mass of aniline and 0.2 parts by mass of triethylamine were added to the polymerization solution, and the mixture was reacted at 140 ℃ for 7 hours. The imidization reaction solution after the completion of the reaction was fed into a vented screw extruder, and volatile components were removed to obtain a granular maleimide-based copolymer A-4. The analysis results of the obtained maleimide-based copolymer are shown in Table 1.
< preparation example of Maleimide-based copolymer (A-5) >
85 parts by mass of styrene, 7 parts by mass of acrylonitrile, 1 part by mass of maleic anhydride, 0.72 part by mass of alpha-methylstyrene dimer, and 30 parts by mass of methyl ethyl ketone were charged into an autoclave having a capacity of about 120 liters equipped with a stirrer, and after the gas phase portion was replaced with nitrogen, the temperature was raised to 92 ℃ over 40 minutes while stirring. After the temperature was raised, the mixture was kept at 92 ℃ and a solution prepared by dissolving 7 parts by mass of maleic anhydride and 0.80 part by mass of t-butyl peroxy-2-ethylhexanoate in 33 parts by mass of methyl ethyl ketone was continuously added over 6 hours. After the addition was completed, the temperature was raised to 120 ℃ to complete the polymerization within 1 hour. Subsequently, 5 parts by mass of aniline and 0.1 part by mass of triethylamine were added to the polymerization solution, and the mixture was reacted at 140 ℃ for 7 hours. The imidized reaction solution after the completion of the reaction was fed into a vented screw extruder, and volatile components were removed to obtain a granular maleimide-based copolymer A-5. The analysis results of the obtained maleimide-based copolymer are shown in Table 1.
< preparation example of Maleimide-based copolymer (A-6) >
25 parts by mass of styrene, 26 parts by mass of acrylonitrile, 2 parts by mass of maleic anhydride, 0.53 part by mass of alpha-methylstyrene dimer, and 30 parts by mass of methyl ethyl ketone were charged into an autoclave having a capacity of about 120 liters equipped with a stirrer, and after the gas phase portion was replaced with nitrogen, the temperature was raised to 92 ℃ over 40 minutes while stirring. After the temperature rise, the mixture was maintained at 92 ℃ for 3 hours, and a solution of 34 parts by mass of styrene, 13 parts by mass of maleic anhydride, and 0.22 part by mass of t-butyl-2-ethylhexanoate dissolved in 67 parts by mass of methyl ethyl ketone was continuously added. After the addition of further maleic anhydride was completed, a solution of 0.18 parts by mass of t-butyl peroxide-2-ethylhexanoate dissolved in 1 part by mass of methyl ethyl ketone was continuously added over 2.5 hours. After the addition, the temperature was raised to 120 ℃ to complete the polymerization within 1 hour. Subsequently, 12 parts by mass of aniline and 0.2 parts by mass of triethylamine were added to the polymerization solution, and the mixture was reacted at 140 ℃ for 7 hours. The imidization reaction solution after the completion of the reaction was fed into a vented screw extruder, and volatile components were removed to obtain a granular maleimide-based copolymer A-6. The analysis results of the obtained maleimide-based copolymer are shown in Table 1.
< preparation example of Maleimide-based copolymer (A-7) >
23 parts by mass of styrene, 26 parts by mass of acrylonitrile, 2 parts by mass of maleic anhydride, 0.32 part by mass of alpha-methylstyrene dimer, and 32 parts by mass of methyl ethyl ketone were charged into an autoclave having a capacity of about 120 liters equipped with a stirrer, and after the gas phase portion was replaced with nitrogen, the temperature was raised to 92 ℃ over 40 minutes under stirring. After raising the temperature, the temperature was maintained at 92 ℃ and a solution prepared by dissolving 33 parts by mass of styrene, 16 parts by mass of maleic anhydride, and 0.22 part by mass of t-butyl peroxy-2-ethylhexanoate in 81 parts by mass of methyl ethyl ketone was continuously added over 3 hours. After further addition of maleic anhydride, a solution of 0.18 parts by mass of t-butyl peroxide-2-ethylhexanoate dissolved in 1 part by mass of methyl ethyl ketone was continuously added over 2.5 hours. After the addition, the temperature was raised to 120 ℃ to complete the polymerization within 1 hour. Subsequently, 14 parts by mass of aniline and 0.3 part by mass of triethylamine were added to the polymerization solution, and the mixture was reacted at 140 ℃ for 7 hours. The imidization reaction solution after the completion of the reaction was fed into a vented screw extruder, and volatile components were removed to obtain a granular maleimide-based copolymer A-7. The analysis results of the obtained maleimide-based copolymer are shown in Table 1.
< preparation example of Maleimide-based copolymer (A-8) >
19 parts by mass of styrene, 25 parts by mass of acrylonitrile, 3 parts by mass of maleic anhydride, 0.90 parts by mass of alpha-methylstyrene dimer, and 34 parts by mass of methyl ethyl ketone were charged into an autoclave having a capacity of about 120 liters equipped with a stirrer, the gas phase part was replaced with nitrogen, and then the temperature was raised to 92 ℃ over 40 minutes while stirring. After raising the temperature, the temperature was maintained at 92 ℃ and a solution prepared by dissolving 34 parts by mass of styrene, 20 parts by mass of maleic anhydride, and 0.23 part by mass of t-butyl peroxide-2-ethylhexanoate in 100 parts by mass of methyl ethyl ketone was continuously added over 3 hours. After the addition of further maleic anhydride was completed, a solution of 0.19 parts by mass of t-butyl peroxy-2-ethylhexanoate dissolved in 2 parts by mass of methyl ethyl ketone was continuously added over 2.5 hours. After the addition, the temperature was raised to 120 ℃ to complete the polymerization within 1 hour. Subsequently, 18 parts by mass of aniline and 0.3 part by mass of triethylamine were added to the polymerization solution, and the mixture was reacted at 140 ℃ for 7 hours. The imidization reaction solution after the completion of the reaction was fed into a vented screw extruder, and volatile components were removed to obtain a granular maleimide-based copolymer A-8. The analysis results of the obtained maleimide-based copolymer are shown in Table 1.
< preparation example of Maleimide-based copolymer (B-1) >
7 parts by mass of styrene, 33 parts by mass of acrylonitrile, 3 parts by mass of maleic anhydride, 0.71 parts by mass of alpha-methylstyrene dimer, and 37 parts by mass of methyl ethyl ketone were placed in an autoclave having a capacity of about 120 liters equipped with a stirrer, the gas phase part was replaced with nitrogen, and then the temperature was raised to 92 ℃ over 40 minutes while stirring. After raising the temperature, the temperature was maintained at 92 ℃ and a solution prepared by dissolving 36 parts by mass of styrene, 21 parts by mass of maleic anhydride and 0.18 part by mass of t-butyl peroxy-2-ethylhexanoate in 105 parts by mass of methyl ethyl ketone was continuously added over 2.5 hours. After the addition of maleic anhydride was completed, a solution of 0.18 parts by mass of t-butyl peroxy-2-ethylhexanoate dissolved in 1 part by mass of methyl ethyl ketone was continuously added for 2.5 hours. After the addition, the temperature was raised to 120 ℃ to complete the polymerization within 1 hour. Subsequently, 15 parts by mass of aniline and 0.4 part by mass of triethylamine were added to the polymerization solution, and the mixture was reacted at 140 ℃ for 7 hours. The imidization reaction solution after the completion of the reaction was fed into a vented screw extruder, and volatile components were removed to obtain a granular maleimide-based copolymer B-1. The analysis results of the obtained maleimide-based copolymer are shown in Table 2.
< preparation example of Maleimide-based copolymer (B-2) >
94 parts by mass of styrene, 2 parts by mass of acrylonitrile, 0.4 part by mass of maleic anhydride, 0.58 part by mass of α -methylstyrene dimer, and 28 parts by mass of methyl ethyl ketone were placed in an autoclave having a capacity of about 120 liters equipped with a stirrer, the gas phase part was replaced with nitrogen, and then the temperature was raised to 92 ℃ over 40 minutes under stirring. After the temperature was raised, the mixture was kept at 92 ℃ for 7.5 hours, and a solution prepared by dissolving 4 parts by mass of maleic anhydride and 1.0 part by mass of t-butyl peroxy-2-ethylhexanoate in 18 parts by mass of methyl ethyl ketone was continuously added. After the addition, the temperature was raised to 120 ℃ to complete the polymerization within 1 hour. Subsequently, 3 parts by mass of aniline and 0.1 part by mass of triethylamine were added to the polymerization solution, and the mixture was reacted at 140 ℃ for 7 hours. The imidization reaction solution after the completion of the reaction was fed into a vented screw extruder, and volatile components were removed to obtain a granular maleimide-based copolymer B-2. The analysis results of the obtained maleimide-based copolymer are shown in Table 2.
< preparation example of Maleimide-based copolymer (B-3) >
88 parts by mass of styrene, 1 part by mass of maleic anhydride, 0.48 part by mass of α -methylstyrene dimer, and 29 parts by mass of methyl ethyl ketone were charged in an autoclave having a capacity of about 120 liters equipped with a stirrer, and after the gas phase portion was replaced with nitrogen, the temperature was raised to 92 ℃ over 40 minutes under stirring. After the temperature was raised, the mixture was kept at 92 ℃ for 8.5 hours, and a solution prepared by dissolving 11 parts by mass of maleic anhydride and 1.20 parts by mass of t-butyl peroxy-2-ethylhexanoate in 56 parts by mass of methyl ethyl ketone was continuously added. After the addition, the temperature was raised to 120 ℃ to complete the polymerization within 1 hour. Subsequently, 9 parts by mass of aniline and 0.2 parts by mass of triethylamine were added to the polymerization solution, and the mixture was reacted at 140 ℃ for 7 hours. The imidization reaction solution after the completion of the reaction was fed into a vented screw extruder, and volatile components were removed to obtain a granular maleimide-based copolymer B-3. The analysis results of the obtained maleimide-based copolymer are shown in Table 2.
< preparation example of Maleimide-based copolymer (B-4) >
63 parts by mass of styrene, 22 parts by mass of acrylonitrile, 2 parts by mass of maleic anhydride, 0.59 part by mass of α -methylstyrene dimer, and 30 parts by mass of methyl ethyl ketone were transferred to an autoclave having a capacity of about 120 liters equipped with a stirrer, the gas phase part was replaced with nitrogen, and then the temperature was raised to 92 ℃ over 40 minutes while stirring. After the temperature was raised, the mixture was kept at 92 ℃ and a solution of 13 parts by mass of maleic anhydride and 0.44 part by mass of t-butyl peroxy-2-ethylhexanoate dissolved in 69 parts by mass of methyl ethyl ketone was continuously added over 4 hours. After the addition of further maleic anhydride was completed, a solution of 0.16 parts by mass of t-butyl peroxy-2-ethylhexanoate dissolved in 1 part by mass of methyl ethyl ketone was continuously added for 1.5 hours. After the addition, the temperature was raised to 120 ℃ to complete the polymerization within 1 hour. Subsequently, 3 parts by mass of aniline and 0.2 parts by mass of triethylamine were added to the polymerization solution, and the mixture was reacted at 140 ℃ for 7 hours. The imidized reaction solution after the completion of the reaction was fed into a vented screw extruder, and volatile components were removed to obtain a granular maleimide-based copolymer B-4. The analysis results of the obtained maleimide-based copolymer are shown in Table 2.
< preparation example of Maleimide-based copolymer (B-5) >
7 parts by mass of styrene, 40 parts by mass of acrylonitrile, 2 parts by mass of maleic anhydride, 0.61 part by mass of alpha-methylstyrene dimer, and 34 parts by mass of methyl ethyl ketone were charged into an autoclave having a capacity of about 120 liters equipped with a stirrer, the gas phase portion was replaced with nitrogen, and then the temperature was raised to 92 ℃ over 40 minutes under stirring. After raising the temperature, the temperature was maintained at 92 ℃ and a solution prepared by dissolving 40 parts by mass of styrene, 11 parts by mass of maleic anhydride and 0.21 part by mass of t-butyl peroxy-2-ethylhexanoate in 55 parts by mass of methyl ethyl ketone was continuously added over 3 hours. After the addition of further maleic anhydride was completed, a solution of 0.14 parts by mass of t-butyl peroxy-2-ethylhexanoate dissolved in 1 part by mass of methyl ethyl ketone was continuously added over 2 hours. After the addition, the temperature was raised to 120 ℃ to complete the polymerization within 1 hour. Subsequently, 10 parts by mass of aniline and 0.2 parts by mass of triethylamine were added to the polymerization solution, and the mixture was reacted at 140 ℃ for 7 hours. The imidization reaction solution after the completion of the reaction was fed into a vented screw extruder, and volatile components were removed to obtain a granular maleimide-based copolymer B-5. The analysis results of the obtained maleimide-based copolymer are shown in Table 2.
< preparation example of Maleimide-based copolymer (B-6) >
19 parts by mass of styrene, 23 parts by mass of acrylonitrile, 3 parts by mass of maleic anhydride, 0.99 part by mass of alpha-methylstyrene dimer, and 35 parts by mass of methyl ethyl ketone were charged in an autoclave having a capacity of about 120 liters equipped with a stirrer, and after the gas phase portion was replaced with nitrogen, the temperature was raised to 92 ℃ over 40 minutes while stirring. After raising the temperature, the temperature was maintained at 92 ℃ and a solution prepared by dissolving 35 parts by mass of styrene, 20 parts by mass of maleic anhydride, and 0.23 part by mass of t-butyl peroxide-2-ethylhexanoate in 104 parts by mass of methyl ethyl ketone was continuously added over 3 hours. After the addition of further maleic anhydride was completed, a solution of 0.19 parts by mass of t-butyl peroxy-2-ethylhexanoate dissolved in 2 parts by mass of methyl ethyl ketone was continuously added for 2.5 hours. After the addition, the temperature was raised to 120 ℃ to complete the polymerization within 1 hour. Subsequently, 20 parts by mass of aniline and 0.3 part by mass of triethylamine were added to the polymerization solution, and the reaction was carried out at 140 ℃ for 7 hours. The imidization reaction solution after the completion of the reaction was fed into a vented screw extruder, and volatile components were removed to obtain a granular maleimide-based copolymer B-6. The analysis results of the obtained maleimide-based copolymer are shown in Table 2.
< preparation example of Maleimide-based copolymer (B-7) >
22 parts by mass of styrene, 10 parts by mass of acrylonitrile, 3 parts by mass of maleic anhydride, 0.45 part by mass of alpha-methylstyrene dimer, and 39 parts by mass of methyl ethyl ketone were placed in an autoclave having a capacity of about 120 liters equipped with a stirrer, the gas phase part was replaced with nitrogen, and then the temperature was raised to 92 ℃ over 40 minutes while stirring. After raising the temperature, the temperature was maintained at 92 ℃ and a solution prepared by dissolving 41 parts by mass of styrene, 23 parts by mass of maleic anhydride, and 0.42 part by mass of t-butyl peroxy-2-ethylhexanoate in 116 parts by mass of methyl ethyl ketone was continuously added over 5 hours. After the addition, the temperature was raised to 120 ℃ to complete the polymerization within 1 hour. Subsequently, 23 parts by mass of aniline and 0.4 part by mass of triethylamine were added to the polymerization solution, and the mixture was reacted at 140 ℃ for 7 hours. The imidization reaction solution after the completion of the reaction was fed into a vented screw extruder, and volatile components were removed to obtain a granular maleimide-based copolymer B-7. The analysis results of the obtained maleimide-based copolymer are shown in Table 2.
< preparation example of Maleimide-based copolymer (B-8) >
84 parts by mass of styrene, 12 parts by mass of acrylonitrile, 1 part by mass of maleic anhydride, 0.57 part by mass of alpha-methylstyrene dimer, and 26 parts by mass of methyl ethyl ketone were charged into an autoclave having a capacity of about 120 liters equipped with a stirrer, and after the gas phase portion was replaced with nitrogen, the temperature was raised to 92 ℃ over 40 minutes while stirring. After the temperature was raised, the mixture was kept at 92 ℃ for 4.5 hours, and a solution prepared by dissolving 3 parts by mass of maleic anhydride and 0.82 part by mass of t-butyl peroxy-2-ethylhexanoate in 24 parts by mass of methyl ethyl ketone was continuously added. After the addition of further maleic anhydride was completed, a solution of 0.18 parts by mass of t-butyl peroxy-2-ethylhexanoate dissolved in 1 part by mass of methyl ethyl ketone was continuously added over 1 hour. After the addition, the temperature was raised to 120 ℃ to complete the polymerization within 1 hour. Subsequently, 3 parts by mass of aniline and 0.1 part by mass of triethylamine were added to the polymerization solution, and the mixture was reacted at 140 ℃ for 7 hours. The imidization reaction solution after the completion of the reaction was fed into a vented screw extruder, and volatile components were removed to obtain a granular maleimide-based copolymer B-8. The analysis results of the obtained maleimide-based copolymer are shown in Table 2.
< chlorine-containing Polymer resin composition >
(use of raw materials) the raw materials used in each example and each comparative example are as follows.
(1) Chlorine-containing Polymers (PVC)
Product name: TH-1000 (manufactured by Taiyo Vinyl Corporation).
(2) Maleimide copolymer
The compounds (A-1 to A-8 and B-1 to B-8) obtained in the above production examples were used.
Examples 1 to 8 and comparative examples 1 to 8 (kneading and mixing of Maleimide copolymer and chlorine-containing Polymer)
The maleimide-based copolymers A-1 to A-8 and B-1 to B-8 were mixed with a commercially available chlorine-containing polymer (product name: TH-1000, manufactured by Taiyo Vinyl Corporation) previously added with a combination of a stabilizer and a lubricant and mixed by a Henschel mixer in the compounding ratio shown in tables 1 to 2, and then the mixture was rolled up to a ROLL sheet by a test ROLL (phi 6X L15 test ROLL, KANSAI ROLL Co., ltd., manufactured by Ltd.), and the ROLL sheet was overlapped and subjected to extrusion molding, cutting or molding to prepare a test piece, and then the respective physical property values thereof were measured. The results are shown in tables 1 and 2.
(component analysis)
The composition analysis of each monomer unit was carried out by the C-13NMR method under the following measurement conditions.
Device name: FT-NMR AVANCE (BRUKER Co., ltd.)
Solvent: deuterated chloroform
Temperature: 14% by mass
Temperature: 27 deg.C
And (4) accumulating times: 8000 times (weight average molecular weight)
The weight average molecular weight is a value in terms of polystyrene measured by Gel Permeation Chromatography (GPC) and is measured using the following conditions.
The measurement name: SYSTEM-21Shodex (manufactured by Showa Denko K.K.)
A chromatographic column: 3 PL gel MIXED-B (manufactured by Polymer Laboratories) were used in series
Temperature: 40 deg.C
And (3) detection: differential refractive index
Solvent: tetrahydrofuran (THF)
Temperature: 2% by mass
And (3) correcting a curve: prepared using standard Polystyrene (PS) (manufactured by Polymer Laboratories, inc.)
(melt viscosity)
The melt viscosity was measured by a capillary die with L =40mm and D =1mm at 190 ℃ and a shear rate of 100/sec. The measuring apparatus used was a capillary rheometer 1D manufactured by Toyo Seiki Seisaku-Sho Ltd.
(Vicat softening temperature)
The Vicat softening temperature is based on JIS K7206:1999 50 method (load 50N, temperature rise rate 50 ℃/hr), using a test piece 20mm X20 mm and 4mm thick. The HDT & V SPT test apparatus manufactured by Toyo Seiki Seisaku-Sho, ltd.
(yellowness (YI))
Measured according to JIS K-7373. The specific procedure is as follows.
1g of maleimide copolymer was dissolved in 25mL of tetrahydrofuran. After dissolution, it was transferred to a square cell for measurement. The color difference was determined by using a CIE standard D65 light source under conditions of a temperature of 23 ℃ and a humidity of 50% using a transmission method with a square pool of tetrahydrofuran solution as a blank, and the value was defined as the yellowness.
Device name: SE7700 spectrocolorimeter (manufactured by Nippon Denshoku industries Co., ltd.)
A square pool: A02277A 10 × 36 × 55H double-sided transmission type square pool
TABLE 1
Figure BDA0003895416940000221
TABLE 2
Figure BDA0003895416940000231
In examples 1 to 8 (using the chlorine-containing polymer resin compositions using the maleimide-based copolymers according to the present invention), the heat resistance of the chlorine-containing polymer was sufficiently improved. Further, the yellowness of the maleimide-based copolymer to be used is controlled to a low level, whereby the coloring of the resin composition and the molded article thereof can be suppressed.
In contrast, in comparative examples 1 to 8 (using chlorine-containing polymer resin compositions using maleimide-based copolymers not satisfying the requirements of the present invention), the heat resistance of the chlorine-containing polymer may not be sufficiently improved. Further, when the maleimide-based copolymer to be used has a high yellowness, there is a possibility that the resin composition and the molded article thereof are colored. Further, the maleimide-based copolymer and the chlorine-containing polymer may not be melted and may not be kneaded.
Industrial applicability
The present invention provides a maleimide copolymer which can provide a chlorine-containing polymer resin composition having improved heat resistance of a chlorine-containing polymer and suppressed coloration, a chlorine-containing polymer resin composition containing the maleimide copolymer and the chlorine-containing polymer, and a molded article thereof. It is suitable for use in molded articles requiring heat resistance and appearance properties such as gutters and air-conditioning duct covers.

Claims (9)

1. A maleimide copolymer for chlorine-containing polymers, wherein,
the maleimide-based copolymer for chlorine-containing polymers comprises 40 to 90 mass% of the aromatic vinyl monomer unit, 0.5 to 30 mass% of the vinyl cyanide monomer unit, 0 to 10 mass% of the unsaturated acid anhydride monomer unit and 5 to 30 mass% of the maleimide monomer unit, based on 100 mass% of the total of the aromatic vinyl monomer unit, vinyl cyanide monomer unit, unsaturated acid anhydride monomer unit and maleimide monomer unit,
the melt viscosity measured at 190 ℃ and a shear rate of 100/sec is 200 to 100000Pa · sec.
2. A chlorine-containing polymer-based resin composition comprising, in a specific ratio,
comprising 5 to 50% by mass of the maleimide copolymer of claim 1 and 50 to 95% by mass of a chlorine-containing polymer.
3. The chlorine-containing polymer-based resin composition according to claim 2,
the melt viscosity is 200 to 70000Pa sec.
4. The chlorine-containing polymer-based resin composition according to claim 2 or 3,
the maleimide copolymer contains 50 to 80 mass% of aromatic vinyl monomer units.
5. The chlorine-containing polymer resin composition according to any one of claims 2 to 4,
the maleimide copolymer contains 5 to 25 mass% of vinyl cyanide monomer units.
6. The chlorine-containing polymer resin composition according to any one of claims 2 to 5,
the maleimide copolymer contains 0.3 to 5 mass% of unsaturated acid anhydride monomer units.
7. The chlorine-containing polymer resin composition according to any one of claims 2 to 6,
the maleimide copolymer contains 5 to 25 mass% of maleimide monomer units.
8. The chlorine-containing polymer resin composition according to any one of claims 2 to 7,
the maleimide monomer unit is N-aryl maleimide.
9. A molded article obtained by molding the chlorine-containing polymer resin composition according to any one of claims 2 to 8.
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WO2023191062A1 (en) * 2022-03-31 2023-10-05 デンカ株式会社 Chlorine-containing polymer modifier, resin composition, and molded body

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02265944A (en) * 1989-04-05 1990-10-30 Nippon Oil & Fats Co Ltd Vinyl chloride resin composition
JPH04122759A (en) * 1990-09-14 1992-04-23 Sekisui Chem Co Ltd Vinyl chloride resin composition
JPH10279757A (en) * 1997-04-04 1998-10-20 Mitsui Chem Inc Vinyl chloride-based resin composition and molding product by using the same
JPH11302482A (en) * 1998-04-22 1999-11-02 Mitsui Chem Inc Vinyl chloride resin composition and molded product using the same
JP2005263976A (en) * 2004-03-18 2005-09-29 Denki Kagaku Kogyo Kk Vinyl chloride resin composition

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006265373A (en) * 2005-03-24 2006-10-05 Denki Kagaku Kogyo Kk Vinyl chloride resin composition comprising maleimide copolymer and vinyl chloride polymer
JP6475501B2 (en) 2015-01-26 2019-02-27 デンカ株式会社 Vinyl chloride resin heat-resistant reforming copolymer, molded body, vinyl chloride piping

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02265944A (en) * 1989-04-05 1990-10-30 Nippon Oil & Fats Co Ltd Vinyl chloride resin composition
JPH04122759A (en) * 1990-09-14 1992-04-23 Sekisui Chem Co Ltd Vinyl chloride resin composition
JPH10279757A (en) * 1997-04-04 1998-10-20 Mitsui Chem Inc Vinyl chloride-based resin composition and molding product by using the same
JPH11302482A (en) * 1998-04-22 1999-11-02 Mitsui Chem Inc Vinyl chloride resin composition and molded product using the same
JP2005263976A (en) * 2004-03-18 2005-09-29 Denki Kagaku Kogyo Kk Vinyl chloride resin composition

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