Moisture-curable, polyether urethanes with reactive silane groups and their use as sealants, adhesives and coatings

   
   

A moisture-curable, alkoxysilane-functional polyether urethanes containing a) 20 to 90% by weight, of a polyether urethane containing two or more reactive silane groups and one or more polyether segments, where the polyether segments have a number average molecular weight (Mn) of at least 3000 and a degree of unsaturation of less than 0.04 milliequivalents/g, and the sum of Mn of all of the polyether segments per molecule averages 6000 to 20,000, and the reactive silane groups are incorporated by the reaction of an isocyanate group with a compound of formula H.sub.2 N--Y--Si--(X).sub.3 (I) b) 10 to 80% by weight, of a polyether urethane containing one reactive silane group and one or more polyether segments having Mn of 1000 to 15,000, where the reactive silane groups are incorporated by the reaction of an isocyanate group with a compound of formula ##STR1##

Uns urethanes umidade-moisture-curable, alkoxysilane-funcionais do polyether que contêm a) 20 a 90% pelo peso, de um urethane do polyether que contem grupos dois ou mais reactive do silane e um ou mais segmentos do polyether, onde os segmentos do polyether têm um peso molecular da média do número (manganês) ao menos de 3000 e um grau de unsaturation de menos de 0.04 milliequivalents/g, e a soma do manganês de todos os segmentos do polyether por médias 6000 a 20.000, e os grupos reactive da molécula do silane são incorporados pela reação de um grupo do isocyanate com um composto da fórmula H.sub.2 N -- Y -- o silicone -- (X).sub.3 (I) b) 10 a 80% pelo peso, de um urethane do polyether que contem um reactive silane segmentos do polyether que têm um manganês de 1000 a 15.000, onde os grupos reactive do silane são incorporados pela reação de um grupo do isocyanate com um composto do ## do ## STR1 da fórmula

 
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