Elastomer composition and pressure-sensitive adhesive...

Details Elastomer composition and pressure-sensitive adhesive... Elastomer composition and pressure-sensitive adhesive...

2007-05-01

2007-05-01

Teskin, Fred (Department: 1713)

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

Synthetic resins

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

C525S086000, C524S505000, C156S334000

Reexamination Certificate

active

10544645

ABSTRACT:
The invention provides an elastomer composition including an aromatic vinyl-isoprene block copolymer (a) having two or more poly(aromatic vinyl) blocks, in an amount more than 10 wt. % and less than 47.5 wt. %; an aromatic vinyl-isoprene diblock copolymer (b) in an amount more than 47.5 wt. % and less than 85 wt. %; and polyisoprene (c) having a weight average molecular weight of 20,000 to 100,000, in an amount more than 5 wt. % and less than 20 wt. %, wherein the composition has an aromatic vinyl monomer unit content more than 14 wt. % and less than 50 wt. %, based on the total amount of the components (a), (b), and (c).The elastomer composition is suitable for providing the pressure-sensitive adhesive composition, which exhibits excellent initial bond strength, peel strength, and holding power, and, even at relatively low temperature, exhibits minimal drop in initial bond strength and peel strength.

REFERENCES:
patent: 5869562 (1999-02-01), Lindquist et al.
patent: 5891957 (1999-04-01), Hansen et al.
patent: 6630536 (2003-10-01), Kuniya et al.
patent: 60-223880 (1985-11-01), None
patent: 60-226578 (1985-11-01), None
patent: 60-226579 (1985-11-01), None
patent: WO-96/11236 (1996-04-01), None

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