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Rubber modified styrene resin composite

A styrene-based resin and styrene-based technology, applied in the field of rubber-modified styrene-based resin compositions, can solve the problem of reduced Izod impact strength and the inability to simultaneously improve Izod impact strength and drop-weight impact strength, drop-weight Insufficient impact strength, etc., to achieve excellent formability, drop weight impact strength, good flexural modulus, and good rigidity

Inactive Publication Date: 2006-12-20
CHI MEI CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, among the rubber-modified styrene-based resins obtained by these methods, those modified with polybutadiene rubber have good Izod impact strength, but the drop-weight impact strength is insufficient.
In addition, those modified with styrene-butadiene block copolymers have good falling weight impact strength, but the Izod impact strength tends to decrease.
Neither of the above can improve the two physical properties of Izod impact strength and drop weight impact strength at the same time

Method used

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  • Rubber modified styrene resin composite
  • Rubber modified styrene resin composite
  • Rubber modified styrene resin composite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0085] 1.5 parts by weight of styrene-butadiene block copolymer (a1) (manufactured by Chi Mei Industrial Co., Ltd., trade name KIBITON PB-511, styrene content 30% by weight), 3.0 parts by weight of cis Polybutadiene rubber (a2) (manufactured by Ube Kogyo Co., Ltd., trade name UBE-POL BR-015H) with 98 mol% formula structure, 3.0 parts by weight of polybutadiene rubber (a3) ​​with 35 mol% cis structure (manufactured by Chi Mei Industrial Co., Ltd., trade name KIBIPOL PR-255), 92.5 parts by weight of styrene monomer (100 parts by weight in total), 6 parts by weight of ethylbenzene, 0.015 parts by weight of polymerization initiator TX- 29A, the chain transfer agent TDM of 0.025 weight part, the Ix-1076 of 0.2 weight part, the TNPP of 0.1 weight part, and the raw material solution of the zinc stearate (abbreviated as Zn-ST below) of 0.2 weight part mix, supply continuously to Three columnar flow reactors in series, the volume of the reactor is 100 liters, the internal temperature o...

Embodiment 2

[0088]With the operating method of [Example 1], the difference is that the composition and amount of rubber are changed, that is, 1.5 parts by weight of styrene-butadiene block copolymer (a1) (Chi Mei Industrial Co., Ltd. manufactured, trade name KIBITON PB-511), 2.5 parts by weight of polybutadiene rubber (a2) with a cis structure of 96 mol % (manufactured by Ube Kogyo Co., Ltd., trade name UBE-POLBR-23H), 3.5 parts by weight of The polybutadiene rubber (a3) ​​(manufactured by Chi Mei Corporation, trade name KIBIPOL PR-245) with a cis structure of 35 mol% had a monomer conversion rate of 80% by weight in the final reactor. The rubber component of the rubber-modified styrene-based resin composition is 9.2% by weight, and the weight-average particle diameter of the rubber particles is 2.5 μm. The manufacturing formula and physical property analysis are listed in Table 1.

Embodiment 3

[0090] With the operation method of [Example 1], the difference is that the composition and consumption of rubber are changed, that is, the block copolymer (a1) of 1.0 parts by weight of styrene-butadiene (manufactured by Chi Mei Industrial Co., Ltd., Trade name KIBITON PB-511), 2.0 parts by weight of polybutadiene rubber (a2) of 96 mol% cis structure (made by Ube Kogyo Co., Ltd., trade name UBE-POLBR-23H), 4.5 parts by weight of cis The polybutadiene rubber (a3) ​​(manufactured by Chi Mei Corporation, trade name KIBIPOL PR-245) with a structure of 35 mol% had a monomer conversion rate of 80% by weight in the final reactor. The rubber component of the rubber-modified styrene-based resin composition is 9.2% by weight, and the weight-average particle diameter of the rubber particles is 2.8 μm. The manufacturing formula and physical property analysis are listed in Table 1.

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Abstract

The present invention relates to a rubber upgraded styrene series resin composition. Said composition has good flowability, high Izod impact strength, drop hammer impact strength and bending elastic coefficient, and its forming workability is excellent. It is formed from dispersion phase composed of rubber-like particles and continuous phase composed of styrene series polymer body. The composition of the above-mentioned rubber-like particles includes 5-30 wt% of block copolymer body of vinyl aromatic compound and conjugated diene compound, 10-50 wt% of polybutadiene rubber whose cis-structure is above 90 mole% and 30-75 wt% of polybutadiene rubber whose cis-structure is 25-50 mole%, in which, in the rubber-like particles the total number of internally-included styrene series polymer particles whose grain size distribution is in 0.05-0.4 microns is above 80% of all the internally-included particles total number, and the total number of internally-included styrene series polymer particles whose grain size distribution is in above 0.6 microns is below 5% of all the internally-included particles total number.

Description

technical field [0001] The present invention relates to a specific rubber-modified styrene-based resin composition, in particular to a rubber with high fluidity, Izod impact strength, drop-weight impact strength and flexural modulus, and excellent molding processability A modified styrenic resin composition. Background technique [0002] The rubber-modified styrene resin obtained by copolymerizing rubber-like polymers and styrene-based monomers has excellent molding processability, and its manufacturing method also has the advantages of lower manufacturing cost compared with ABS; so it is widely used Applied to various electrical products, business equipment, packaging containers and miscellaneous goods, etc. [0003] In general, the physical property requirements of rubber-modified styrene resins, in addition to emphasizing high Izod impact strength (IZOD), good falling weight impact strength is also very important on the practical side of molded products. [0004] In ord...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F279/00C08L9/00C08L53/02
Inventor 方真详
Owner CHI MEI CORP
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