Pressure-sensitive adhesive composition and...

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...

Reexamination Certificate

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C524S523000

Reexamination Certificate

active

06939911

ABSTRACT:
A pressure-sensitive adhesive composition contains (a) an acrylic polymer containing an alkyl (meth)acrylate whose alkyl group has from 4 to 12 carbon atoms, as a monomer major component and from 1 to 10 parts by weight, based on 100 parts by weight of the whole of the monomer components, of a carboxyl group-containing monomer as a monomer component and having a weight average molecular weight of from 500,000 to 900,000; and (b) an oligomer containing an ethylenically unsaturated monomer, in which a homopolymer formed therefrom has a glass transition temperature of from 60 to 190° C. and which has a cyclic structure, as a monomer major component and from 1 to 10 parts by weight, based on 100 parts by weight of the whole of the monomer components, of a carboxyl group-containing monomer as a monomer component and having a weight average molecular weight of from 3,000 to 6,000.

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European Search Report dated Oct. 27, 2004.

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