Alkoxysilane-terminated, moisture-hardening polyurethanes and th

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From silicon reactant having at least one...

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528 29, 528 30, 528 38, C08G 7704, C08G 7722, C08G 7726

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048576239

ABSTRACT:
Alkoxysilane-terminated, moisture-hardening polyurethanes obtained by reaction of OH-terminated diols and/or triols with diisocyanates to form NCO-terminated polyurethanes having an NCO functionality of at least 2, and reaction of some of the NCO groups with aliphatic alcohols to form a polyurethane having an NCO functionality of at least 1 and less than 2, or by reaction of the OH-terminated linear diols or triols with a mixture of mono- and diisocyanates to form NCO-terminated polyurethanes having an NCO functionality of at least 1 and less than 2, followed by a reaction of substantially all the free NCO functions of the polyurethanes obtained with aminoalkyl, mercaptoalkyl or epoxyalkyl alkoxysilanes. The polyurethanes thus obtained are particularly suitable as a basis for moisture-hardening one-component sealing compounds and adhesives.

REFERENCES:
patent: 3627722 (1970-05-01), Selter et al.
patent: 3979344 (1976-09-01), Bryant et al.
patent: 4555561 (1985-11-01), Sugimori et al.
patent: 4567228 (1986-01-01), Gaa et al.
patent: 4582873 (1986-04-01), Gaa et al.
Patent Abstracts of Japan-Kokai-Nr. 60-47014 vol. 9 Number 175 (C-292) [1898].

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