Thermoplastic elastomeric resin composition and a process for th

Details Thermoplastic elastomeric resin composition and a process for th Thermoplastic elastomeric resin composition and a process for th

1998-11-18

2000-04-11

Warzel, Mark L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525 92G, 525105, 525 98, 525193, 525197, 524269, C08L 5302

Patent

active

060489332

ABSTRACT:
The invention provides a process for the preparation of a thermoplastic elastomeric resin composition comprising (a) 100 parts by weight of a block copolymer consisting of at least two polymeric blocks (A) composed of a vinyl aromatic compound and at least one polymeric block (B) composed of a conjugated diene compound, or a hydrogenated block copolymer, (b) 20 to 300 parts by weight of a non-aromatic softening agent for rubber, (c) 1 to 100 parts by weight of a peroxide-crosslinking type olefinic resin or a copolymeric rubber containing said resin, and (d) 10 to 150 parts by weight of a peroxide-decomposition type olefinic resin or a copolymer containing said resin, characterized in that the process comprises a step of heat-processing component (a), component (b), at least a part of component (c) and a part of component (d) in the presence of an organic peroxide to cause crosslinking, and a subsequent step of blending these with the remaining part of component (d) and, if any, the remaining part of component (c). The obtained composition is soft and good in rubber properties, mechanical strength and processability, and is less sticky.

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