07-10-2021 дата публикации
Номер: US20210309792A1
Silane-terminated polymers of the formula (I) 111.-. (canceled)12. A method for producing silane-terminated polymers of the formula (I){'br': None, 'sup': 3', '12', '2, 'sub': b', 'a', '3-a', 'x, 'Y—[Z—C(═O)—NR—(CR)—SiR(OR)]\u2003\u2003(I),'}whereinY is an x-valent polymer radical comprising at least one polyether, polyester and/or polyacrylate unit,R are identical or different and are monovalent, optionally substituted, SiC-bonded hydrocarbon radicals,{'sup': '1', 'Rare identical or different and are hydrogen or monovalent, optionally substituted hydrocarbon radicals,'}{'sup': '2', 'Rare identical or different and are hydrogen or monovalent, optionally substituted hydrocarbon radicals,'}{'sup': 3', '1', '2, 'sub': 2', 'b', 'a', '3-a', '2, 'Rare identical or different and are hydrogen, monovalent, optionally substituted hydrocarbon radicals, —(CR)—SiR(OR)groups or —CH(COOR′)—CH—COOR′ groups,'}R′ are identical or different and are monovalent, optionally substituted hydrocarbon radicals,Z are identical or different and are NH or oxygen,x is an integer from 1 to 50,a are identical or different and are 0, 1 or 2, andb are identical or different and are integers from 1 to 10,comprising reacting at least one hydroxy-functional polymer (a), comprising at least one polyether, polyester and/or polyacrylate unit, with at least one compound having at least one isocyanate group, in the presence of at least one bismuth-containing catalyst (K), with the proviso that the reaction mixture comprises 50 to 250 ppm water at the start of the reaction.13. The method of claim 12 , wherein carried out at temperatures between 20° C. and 180° C.14. The method of claim 12 , wherein said method produces silane-terminated polymers (method variant 1) of the formula (Ia){'br': None, 'sup': 1', '3', '1', '2, 'sub': 2', 'b', 'a', '3-a', 'x, 'Y—[NH—C(═O)—NR—(CR)—SiR(OR)]\u2003\u2003(Ia),'}by reacting(a1) at least one hydroxy-functional polymer comprising at least one polyether, polyester and/or ...
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