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Thermoplastic resin composition

A thermoplastic resin and composition technology, applied in the field of thermoplastic resin composition, can solve the problems of quality reduction, imperfection, unavoidable impact resistance imparting effect, etc., and achieve the effect of high impact resistance and excellent processability

Inactive Publication Date: 2009-03-11
KANEKA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] However, it is described in this method that if at least 2 to 8 parts by weight, preferably 4 to 6 parts by weight, of a high molecular weight polyanion is not added to 100 parts by weight of the rubber solid content in the rubber latex, the recovered resin powder cannot be suppressed. Adhesive
Generally, it is easily conceivable that if 4 parts by weight or more of foreign matter (that is, a high molecular weight polyanion in this case) is added to the polymer latex, the recovered polymer composition itself, which may be used for various purposes, has inherent will reduce the quality of
In particular, for the purpose of imparting impact resistance to thermoplastic resins, etc., when it is suitable for a graft copolymer whose compounding amount is expected to be reduced as much as possible, it is not a perfect method because it cannot avoid quality degradation such as the effect of imparting impact resistance.

Method used

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  • Thermoplastic resin composition
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preparation example Construction

[0051] The general preparation method of the above-mentioned graft copolymer is specifically described in, for example, JP-A-2002-363372, JP-A-2003-119396, JP-9-286830, etc. limited to them.

[0052] As the monomer that can be used in the graft copolymer (B) of the present invention, for example, a monomer composition obtained by mixing one or two or more monomers selected from the following monomer groups can be used.

[0053] Examples of the aforementioned monomer group include, for example,

[0054] (1) Methyl acrylate, ethyl acrylate, butyl acrylate, 2-ethylhexyl acrylate, octyl acrylate, dodecyl acrylate, octadecyl acrylate, behenyl acrylate, etc. Alkyl acrylates having an alkyl group, alkyl acrylates having a hydroxyl group such as 4-hydroxybutyl acrylate or alkyl acrylates having an alkoxy group,

[0055] (2) Methyl methacrylate, ethyl methacrylate, butyl methacrylate, 2-ethylhexyl methacrylate, dodecyl methacrylate, octadecyl methacrylate, Alkyl methacrylates having...

Embodiment 1

[0087] (Preparation of graft copolymer X)

[0088]

[0089]After adding 350 parts by weight of deionized water and 5 parts by weight of sodium oleate into a glass reactor with a thermometer, a stirrer, a reflux cooler, a nitrogen flow inlet, a monomer addition device and an emulsifier addition device, stir in a nitrogen gas flow while raising the temperature to 50°C. Next, through the above adding device, add a part of the monomer mixture for the seed (b1), namely 3.85 parts by weight of butyl acrylate (hereinafter also referred to as BA), 3.85 parts by weight of styrene (hereinafter also referred to as ST) and as chain transfer agent The mixture of 2.30 parts by weight of tert-dodecyl mercaptan (hereinafter also referred to as TDM) and 0.02 parts by weight of cumene hydroperoxide, further added 0.01 parts by weight of disodium edetate and ferrous sulfate after 10 minutes A mixed solution obtained by dissolving 0.005 part by weight of 7-hydrate salt in 5 parts by weight of ...

Embodiment 2

[0106] (Preparation of graft copolymer Y)

[0107]

[0108] In the glass reactor that has thermometer, stirrer, reflux cooler, nitrogen flow inlet, the adding device of monomer and the adding device of emulsifier, add 160 parts by weight of deionized water and 0.05 part by weight of sodium lauryl sulfate, then , and the temperature was raised to 55° C. while stirring in a nitrogen stream. Then, through the above-mentioned adding device, add 0.39 parts by weight of BA as the monomer mixture for the seed (b1), 0.39 parts by weight of ST, and a mixture of 0.22 parts by weight of TDM and 0.02 parts by weight of cumene hydroperoxide as a chain transfer agent, After 10 minutes, a mixed solution obtained by dissolving 0.001 parts by weight of disodium edetate and 0.0005 parts by weight of ferrous sulfate heptahydrate in 5 parts by weight of distilled water and 0.07 parts by weight of sodium formaldehyde sulfoxylate were added in this state. Stirring was carried out for 1 hour, whe...

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Abstract

Disclosed is a thermoplastic resin composition having high impact resistance without decreasing weather resistance even when only a small amount of an impact strength modifier is blended therein. The thermoplastic resin composition contains 100 parts by weight of a thermoplastic resin (A) and 0.5-20 parts by weight of a graft copolymer (B). The thermoplastic resin composition is characterized in that the graft copolymer (B) contains 70-99% by weight of a crosslinked core (b2), which is obtained by polymerizing a monomer for core (b2) containing not less than 70% by weight of an acrylate in the presence of 0.5-20% by weight of a non-crosslinked seed (b1) having a weight average molecular weight of not more than 40,000, and 0.5-10% by weight of a shell (b3), which is obtained by polymerizing a monomer for shell (b3) containing not less than 50% by weight of a methacrylate. This thermoplastic resin composition is further characterized by containing 0.01-3.0 parts by weight of a water-soluble polymer compound (C) having a physical gel-forming property per 100 parts by weight of the graft copolymer (B).

Description

technical field [0001] The present invention relates to a thermoplastic resin composition excellent in weather resistance and impact resistance. Background technique [0002] In order to improve the impact resistance of thermoplastic resins, a method of adding a graft copolymer obtained by emulsion polymerization or suspension polymerization has been widely used so far. For example, graft copolymers containing dienes or acrylates are known (for example, refer to Patent Document 1). [0003] However, when a diene-based graft copolymer is used in combination with a thermoplastic resin, although the impact resistance is improved, the weather resistance is deteriorated, and when the manufactured molded article is used outdoors, there is a disadvantage that the impact resistance is significantly lowered. Therefore, as an impact resistance modifier for outdoor use, in order to improve the weather resistance of dienes and impart impact resistance, graft copolymers mainly composed ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L101/00C08L27/06C08L51/00C08F265/06
CPCC08L101/00C08L1/08C08F265/04C08L51/003C08L2205/03C08L5/00C08F265/06C08L27/06C08L2666/02C08L2666/24C08L2666/04C08L51/00
Inventor 寺田彻
Owner KANEKA CORP
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