Low-voc dialkyl-functional alkoxysiloxanes, processes and use thereof as hydrophobizing impregnating agents for mineral building materials

摘要

Low-VOC compositions of dialkyl-functional siloxane oligomers, especially of methylalkylalkoxysiloxanes, and processes for producing them are provided. Additionally methods for hydrophobizing porous mineral substrates employing the low-VOC compositions, in the course of which few or no volatile organic compounds are released, are provided.

主权项

1. A composition comprising:
a dialkyl-functional siloxane oligomer of formula (I): and, optionally, a dialkyl-functional cyclic siloxane oligomer of formula (II): wherein each R′ is independently a linear or branched octyl group, each R″ is a methyl group, each R is independently hydrogen or an alkyl group having 1 to 2 C atoms, n is an integer from 0 to 10 and m is an integer from 2 to 10.