Patent ID: 6339137
Filing Date: 2002-01-15
Classification: C07F,C08G

Abstract:
A process for the production of poly(3-aminopropylmethylsiloxane)homopolymer fluids of the general formulae:Me3SiO(H2NCH2CH2CH2MeSiO)xSiMe3 (H2NCH2CH2CH2MeSiO)y wherein Me is methyl, x ranges from 2 to about 100, and y ranges from 3 to about 7, said fluid being of at least said process comprising the steps of:(a) mixing 3-(3-aminopropyl)heptamethyltrisiloxane having at least 95% isomeric purity with a basic catalyst; (b) heating the mixture to produce poly(3-aminopropylmethylsiloxane)homopolymer and hexamethyldisiloxane and to volatilize said hexamethyldisiloxane out of the mixture; (c) evacuating the mixture to remove residual hexamethyldisiloxane from said homopolymer; and (d) heating the product to thermally decompose the basic catalyst and recovering said poly(3-aminopropylmethylsiloxane)homopolymer product which is at least about 95% isomeric purity with respect to the position of each primary amino group in the 3 position of the propyl substituents.