Hydrogenated block copolymer and composition thereof

Details Hydrogenated block copolymer and composition thereof Hydrogenated block copolymer and composition thereof

2011-05-03

2011-05-03

Cheung, William K (Department: 1762)

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

C525S332900

Reexamination Certificate

active

07935756

ABSTRACT:
An object of the present invention is to provide a hydrogenated block copolymer having excellent flexibility, heat resistance, abrasion resistance and surface texture (no stickiness, oil bleeding etc.) and good processability, and a composition thereof. The present invention provides a hydrogenated block copolymer that has therein at least one of each of a vinyl aromatic compound polymer block A, a hydrogenated polymer block B of a random copolymer comprising a conjugated diene and a vinyl aromatic compound, and a hydrogenated polymer block C of a conjugated diene polymer having a vinyl bond content of not less than 30%, the hydrogenated block copolymer having a vinyl aromatic compound content of more than 50 wt % and less than 95 wt %, and a composition containing the hydrogenated block copolymer.

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PDMS properties—Prepared at the 69th JECFA (2008), published in FAO JECFA Monographs 5 (2008), superseding specifications prepared at the 37thJECFA (1990), published in the Combined Compendium of Food Additive Specifications, FAO JECFA Monographs 1 (2005). A temporary ADI of 0-0.8 mg/kg bw was established at the 69th JECFA (2008).
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