Transparent rubber modified styrene resins

A technology of styrene-based resin and transparent rubber, which is applied in the field of transparent rubber-modified polystyrene-based resin, which can solve the problems that the molding of transparent products cannot be used, and the environmental stress cracking resistance of the resin cannot be met.

Inactive Publication Date: 2006-08-16
CHI MEI CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Rubber-modified polystyrene resin is a material with good mechanical strength and good processability. Because of the above advantages, this resin is widely used in food containers, packaging materials, household products, home appliances, and OA Machine shells and other fields, but because the general rubber-modified polystyrene resin is opaque, it cannot be used in the molding of transparent products
[0003] In order to satisfy the strength and transparency of the resin, in known techniques, for example, Japanese Patent Application No. 4-180907, Japanese Patent Application No. 6-16744, Japanese Patent Application No. 8-92329, and Japanese Patent Application No. 9-71621 The invention patent case is to provide a method of copolymerization with styrene and methyl methacrylate in the presence of a styrene-butadiene block copolymer. Although this method can improve the transparency and mechanical strength of the resin , but it cannot meet the physical requirements of the resin with good environmental stress cracking resistance

Method used

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  • Transparent rubber modified styrene resins
  • Transparent rubber modified styrene resins
  • Transparent rubber modified styrene resins

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079]14.0 parts by weight of a rubbery polymer (PR-1205 manufactured by Chimei Corporation, styrene / butadiene content=25 / 75, 1,2-vinyl content=15.4 wt%, solution viscosity 10, taper block copolymer, Mw=130,000), with 38 parts by weight of styrene, 62 parts by weight of methyl methacrylate, 46 parts by weight of ethylbenzene, 0.03 parts by weight of N,N'-4,4'-diphenylmethane bismaleimide part, with 0.11 parts by weight of dodecyl mercaptan, the feed solution formed by 0.13 parts by weight of dibenzoyl peroxide is continuously supplied to the first reactor continuous polymerization device with a pump flow rate of 35kg / hour reaction, the reacted polymer solution enters the second reactor; in addition, 100 parts by weight of styrene and 0.01 parts by weight of N,N'-4,4'-diphenylmethane bismaleimide form the feed Solution, with the flow rate of pump 1kg / hour, is continuously supplied in the second reactor and reacts, and the polymer solution that the second reactor has reacted ent...

Embodiment 2

[0081] Feed solution is as table 1, with the flow rate of pump 35kg / hour, is supplied continuously in the first reactor continuous polymerization device and reacts, and the polymer solution that has reacted enters the second reactor; In addition, styrene 100 weight The feed solution that forms in 10 parts is continuously supplied to the second reactor continuous polymerization device with the flow rate of pump 2kg / hour and reacts; As shown in Table 1, the final polymerization conversion rate was 74%. After the reaction is completed, the transparent rubber-modified styrenic resin of the present invention can be obtained by the same post-treatment method as in Example 1. Analysis of its rubber content is 20.6% by weight; the weight average particle diameter of rubber particles is 0.43 μm; the refractive index difference between the copolymer continuous phase (B) and the rubber particle dispersed phase (A) is 0.002; remaining N, N '-4, 4'-diphenylmethane bismaleimide is less th...

Embodiment 3

[0083] Feed solution is as table 1, with the flow rate of pump 35kg / hour, is supplied continuously in the first reactor continuous polymerization device and reacts, and the polymer solution that has reacted enters the second reactor; In addition, styrene 100 weight The feed solution that forms in part, with the flow rate of pump 2kg / hour, continuously supply to react in the continuous polymerization device of the second reactor; The rotational speed is shown in Table 1, and the final polymerization conversion rate is 75%. After the reaction is completed, the same post-treatment method is implemented to obtain the transparent rubber-modified styrene resin of the present invention. Analysis of its rubber content is 15.2% by weight; the rubber particle weight average particle diameter is 0.37 μ m; the refractive index difference between the copolymer continuous phase (B) and the rubber particle dispersed phase (A) is 0.002; remaining N, N '-4, The content of 4'-diphenylmethane...

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Abstract

The invention transparent rubber modified styrene resin, which comprises (i-1) phenylethene monomer 20-70 weight portions, (i-2) methacrylate ester 30-80 weight portions, (i-3) copolymarization monomer 0-40 weight portions, and polyfunctional maleimide monomer 0.0005-1.0 weight portion as continuous phase, as well as rubber particles formed by rubber-like polymer as disperse phase, the content rubber in the transparent rubber modified styrene resin is 1-40 wt%.

Description

technical field [0001] The present invention relates to transparent rubber-modified styrenic resins, and more specifically, refers to a transparent rubber-modified polystyrene resin composed of a continuous phase of a copolymer and a dispersed phase of rubber particles formed by a rubber-like polymer. Resin, and its copolymer continuous phase is formed by containing polyfunctional maleimide monomer; the above-mentioned transparent rubber-modified polystyrene resin can maintain impact resistance, and has good transparency and environmental stress resistance Cracking properties. Background technique [0002] Rubber-modified polystyrene resin is a material with good mechanical strength and good processability. Because of the above advantages, this resin is widely used in food containers, packaging materials, household products, home appliances, and OA Machine shells and other fields, but because the general rubber-modified polystyrene resin is opaque, it cannot be used in the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L33/08C08J3/00
Inventor 许瑞熙
Owner CHI MEI CORP
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