UV-transparent pressure sensitive adhesive

Details UV-transparent pressure sensitive adhesive UV-transparent pressure sensitive adhesive

2006-12-05

2006-12-05

Egwim, Kelechi C. (Department: 1713)

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

Synthetic resins

Compositions to be polymerized by wave energy wherein said...

C526S222000, C526S224000, C526S319000, C526S905000, C525S309000, C430S270100, C428S346000, C428S35500R, C428S3550EN, C428S356000

Reexamination Certificate

active

07144928

ABSTRACT:
A UV-transparent pressure sensitive adhesive comprising(a) a copolymer of(a1) from 75 to 99.8% by weight of acrylic esters and/or methacrylic esters of the formula CH2═CH(R1)(COOR2), where R1is H or CH3and R2is an alkyl chain having 1 to 20 carbon atoms;(a2) from 0 to 10% by weight of acrylic acid and/or methacrylic acid of the formula CH2═CH(R1)(COOH), where R1is H or CH3;(a3) from 0.2 to 5% by weight of olefinically unsaturated monomers which contain at least one UV-crosslinking functional group per monomer; and(a4) from 0 to 20% by weight of olefinically unsaturated monomers which contain at least one functional group per monomer; the copolymer having a weight average molecular weight of less than 300,000 g/moland(b) from 2 to 20% by weight, based on the weight of copolymer, of a silicate filler, the silicate filler having a maximum particle diameter of 50 nm;and having a residual solvent fraction of less than 1%, based on the pressure sensitive adhesive.

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