25-04-2013 дата публикации
Номер: US20130102738A1
The invention provides curable adhesives of high tensile sheer strength, which contain an a-silane-terminated polyurethane prepolymer containing low molecular weight polyether or polyester groups in the polymer backbone, and a silane-terminated polyether polymer containing polyether groups of higher molecular weight. 19-. (canceled)11. The composition of claim 10 , wherein a silane-terminated polyurethane is prepared from at least one polyol selected from the group consisting of polyether polyols and polyester polyols or mixtures thereof claim 10 , the polyols or mixtures thereof having an average molar mass Mn of not more than 2000 daltons.12. The composition of claim 10 , wherein a silane-terminated polyurethane possesses at least one terminus of the formula (4){'br': None, 'sup': 3', '7, 'L-R\u2003\u2003(4),'}where{'sup': '7', 'Ris an unsubstituted or halogen-substituted linear, branched or cyclic alkyl, alkenyl or arylalkyl radical having at least 7 carbon atoms, and'}{'sup': 3', '5', '5', '5', '5', '5', '5', '5, 'Lis a divalent linking group selected from —O—, —S—, —(R)N—, —O—CO—N(R)—, —N(R)—OO—O—, —N(R)—CO—NH—, —NH—CO—N(R)—, —N(R)—CO—N(R), in addition to silane termini of the formula (1).'}13. The composition of claim 12 , wherein a silane-terminated polyurethane possesses at least one terminus of the formula (4){'br': None, 'sup': 3', '7, 'L-R\u2003\u2003(4),'}where{'sup': '7', 'Ris an unsubstituted or halogen-substituted linear, branched or cyclic alkyl, alkenyl or arylalkyl radical having at least 7 carbon atoms, and'}{'sup': 3', '5', '5', '5', '5', '5', '5', '5, 'Lis a divalent linking group selected from —O—, —S—, —(R)N—, —O—CO—N(R)—, —N(R)—OO—O—, —N(R)—CO—NH—, —NH—CO—N(R)—, —N(R)—CO—N(R), in addition to silane termini of the formula (1).'}14. The composition of claim 12 , wherein 2 to 40% of all of chain ends of the silane-terminated polyurethane are terminated with groups of the formula (3){'br': None, 'sup': 2', '1, 'sub': 3-x', 'x, '—SiR(OR)\u2003\ ...
Подробнее
