03-02-2022 дата публикации
Номер: US20220033698A1
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Described herein is a two-part condensation curable silyl-modified polymer based adhesive composition suitable for the adhesion of a front lens having an anti-haze coating onto a lamp body for lighting applications. Also described herein are lamps comprising a lamp body and a front lens utilizing the adhesive composition to adhere the front lens to the lamp body while generally preserving the integrity of the anti-haze coating. 1. A two-part condensation curable silyl-modified polymer based adhesive composition comprising a base part , Part A , and a catalyst package , Part B , wherein part A comprises:{'sub': m', '3-m, 'sup': '1', '(a) a silyl modified organic polymer having at least two (R)(Y)—Si groups per molecule'}{'sup': '1', 'where each R is a hydroxyl or a hydrolysable group, each Yis an alkyl group containing from 1 to 8 carbons, and m is 1, 2, or 3, and where the organic polymer is selected from the group consisting of polyethers, hydrocarbon polymers, acrylate polymers, polyesters, polyurethanes and polyureas; and'}(b) a reinforcing filler;andwherein Part B comprises:(i) a tin based catalyst; and [ {'br': None, 'sup': 6', '5, 'sub': j', '4-j, 'RSi(OR)'}, '(iia) a silane of the structure'}, {'sup': 5', '6, 'where each Ris an independently selected alkyl group containing at least 2 carbon atoms; j is 1 or 0; and Ris a silicon-bonded organic group selected from a substituted or unsubstituted straight or branched monovalent hydrocarbon group having at least 2 carbons, a cycloalkyl group, an aryl group, an aralkyl group or any one of the foregoing wherein at least one hydrogen atom bonded to carbon is substituted by a halogen atom, or an organic group having an epoxy group, a glycidyl group, an acyl group, a carboxyl group, an ester group, an amino group, an amide group, a (meth)acryl group, a mercapto group or an isocyanate group;'}, {'br': None, 'sup': '7', 'sub': '3', 'RSi(OMe)'}, '(iib) a silane of the structure'}, {'sub': '3', 'sup': 7', '6, 'wherein Me ...
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