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Polymerization method of rubber modified polystyrene system resin

A technology of polystyrene and polymerization method, which is applied in the field of rosin resin acid, and can solve the problems that the resin hue and other physical properties cannot be effectively improved.

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

The above inventions only add special organic acids or higher fatty acids with pka=0.5 to 2.5 to polystyrene resin to improve the molecular weight or impact strength of the resin, but they cannot effectively improve other physical properties such as the hue (yellowness) of the resin.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] 8.2 parts by weight of polybutadiene rubber (manufactured by Chimei Corporation, trade name KIBIPOLPR-255, 35% cis structure), 100 parts by weight of styrene monomer, 7 parts by weight of ethylbenzene, 2.4 parts by weight of paraffin oil, and 0.018 parts by weight of 1,1-bis-peroxy tertiary butyl-3,3,5-trimethylcyclohexane (hereinafter referred to as TX-29A), the third grade dodecane of 0.012 parts by weight Base mercaptan (hereinafter referred to as TDM), 0.24 parts by weight of octadecyl-3-(3,5-two-tertiary butyl-4-hydroxyl phenyl) propionate (hereinafter referred to as Ix-1076), 0.24 After the raw materials such as zinc stearate (hereinafter referred to as Zn-ST) of weight part (hereinafter referred to as Zn-ST), 180ppm (based on styrene-based monomer) rosin acid (made by LATON KOREA company, trade name DX-800H) are mixed, continuously pumped into the reaction System, the above reaction system includes: continuous stirring reaction tank R1 (CSTR), with a volume of 18...

Embodiment 2

[0041]With the operating conditions of [Example 1], wherein, the tertiary dodecylmercaptan usage amount is changed into 0.035 weight part in the raw material, in addition, the 1 of 0.018 weight part, 1-bis-peroxy tertiary butyl- 3,3,5-trimethylcyclohexane is changed into two-tertiary butyl peroxy-hexahydro-terephthalate (HTP) of 0.026 parts by weight, and the consumption of rosin resin acid is changed into 350ppm, The reaction temperature of R1 is 115°C to 117°C, the reaction temperature of R2 and R3 gradually rises from 123 to 170°C, and the remaining operating conditions are shown in Table 1. The rubber-modified polystyrene resin of the present invention is obtained, and its physical properties are measured. The analysis is as follows: Table I.

Embodiment 3

[0043] 8.2 parts by weight of polybutadiene rubber (manufactured by Chimei Corporation, trade name KIBIPOLPR-255, 35% cis structure), 100 parts by weight of styrene monomer, 7 parts by weight of ethylbenzene, 2.4 parts by weight of paraffin oil, and 0.018 parts by weight of 1,1-bis-peroxy tertiary butyl-3,3,5-trimethylcyclohexane (hereinafter referred to as TX-29A), the third grade dodecane of 0.012 parts by weight Base mercaptan (hereinafter referred to as TDM), 0.24 parts by weight of octadecyl-3-(3,5-two-tertiary butyl-4-hydroxyl phenyl) propionate (hereinafter referred to as Ix-1076), 0.24 After raw materials such as zinc stearate (hereinafter referred to as Zn-ST) of weight part are mixed, continuously pump into reaction system, above-mentioned reaction system comprises: a continuous stirring reaction tank R1 (CSTR), 40 liters of volume, reaction tank temperature is 81 ~82°C, the monomer conversion rate at the outlet of R1 is about 8%. At this time, 120ppm of rosin resin ...

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Abstract

A process for polymerizing the rubber modified polystyrene resin features that under existance of diene rubber, styrene takes part in polymerizing reaction while adding rosin acid 5-2000 ppm before the conversion rate of styrene reaches 30%, chain transfer agent and antioxidizing agent.

Description

technical field [0001] The present invention relates to a polymerization method of rubber-modified polystyrene resin, in particular to a method of adding a specific content of rosin acid (rosin acid) at a specific time of the polymerization reaction to improve the hue of the resin (reducing the color of the resin). yellowness), and effectively maintain the balance of physical properties such as impact strength and fluidity. Background technique [0002] Generally speaking, rubber-modified polystyrene (HIPS) resins with good impact resistance have good formability and are easy to dye and process, so they are widely used in the molding of home appliance shells or packaging materials, especially in white or light colors. During the manufacture of computer peripheral products, the whiter the hue of the resin (the lower the yellowness), the more conducive to the hue stability and color rendering of the dyeing process, and the added dyes or pigments such as titanium dioxide ( TiO...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F212/08C08F2/00
Inventor 方真祥
Owner CHI MEI CORP
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