SPECIFIC AMINOALKYL-FUNCTIONAL ALKOXYSILOXANE OLIGOMER MIXTURES, PROCESS FOR PRODUCTION THEREOF AND USE THEREOF

摘要

The present invention relates to specific mixtures comprising catenated aminopropyl-functional alkoxysiloxanes of the general formula I and/or cyclic aminopropyl-functional alkoxysiloxanes of the general formula II;in which the R groups independently consist of(i) aminopropyl-functional groups of the formula;—(CH2)3—NH2,—(CH2)3—NH(CH2)2—NH2 and/or —(CH2)3—NH(CH2)2—NH(CH2)2—NH2,(ii) methoxy and/or ethoxy groups and(iii) optionally butyl or octyl groups,m is an integer from 2 to 30 and n is an integer from 3 to 30, where not more than one aminoalkyl-functional group is bonded to any silicon atom in a compound of the formula I and/or II, andwhere the quotient of the molar ratio of Si to alkoxy groups is at least 0.3, and to a process for production thereof. These are of excellent suitability for application in adhesives and sealants and are notable here for improved bonding, especially on substrates that are difficult to bond to one another.

主权项

1. A mixture comprising catenated aminopropyl-functional alkoxysiloxane oligomers of the general formula I and/or cyclic aminopropyl-functional alkoxysiloxane oligomers of the general formula II in which the R groups independently are
(i) aminopropyl-functional groups of the formulae
—(CH2)3—NH2, —(CH2)3—NH(CH2)2—NH2 and/or —(CH2)3—NH(CH2)2—NH(CH2)2—NH2, (ii) methoxy and/or ethoxy groups, and
(iii) optionally butyl or octyl groups,m is an integer from 2 to 30 and n is an integer from 3 to 30, where not more than one aminopropyl-functional group is bonded to any silicon atom in a compound of the formula I or II, and where the molar ratio of Si to alkoxy groups is at least 0.3.