Organopolysiloxane materials which can be cross-linked by cleaving alcohols into elastomers

US6531621B1 · kind B1 · utility

Assignee

• Wacker Chemie AG · DE

Inventors

• Norman Dorsch · Burghausen, DE
• Rudolf Heinrich · Emmerting, DE
• Oswin Sommer · Burghausen, DE
• Stefan Oberneder · Burghausen, DE
• Wolfgang Hechtl · Burghausen, DE

Key dates

• Filing date: Jul 18, 2000
• Grant date: Mar 11, 2003
• Expiry date: Jul 18, 2020

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K3/1018
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to a method for producing organopolysiloxane terminated with alkoxy groups, wherein A) organopolysiloxane terminated with HO is reacted with B) alkoxysilane having at least three alkoxy groups and/or whose partial hydrolysate is made to react in the presence of C) acid phosphoric acid ester of general formula (I): (HO)aOP(—O—[(CR12)b—O]c[(CR22)d]e—L—M)(3−a), wherein a=1 or 2; R1 and R2=a hydrogen, methyl or hydroxyl radical; b and d=2 or 3; c=integral values from 2 to 15; e=0 or 1; L=a radical from the group —O—, —COO—, —OOC—, —CONR3—, —NR4CO— and —CO—; R3 and R4=a hydrogen or a C1-C10-alkyl radical and M=a monovalent, optionally a hydroxyl, fluorine, chlorine, bromine, C1-C10-alkoxylalkyl or cyano group substituted C1- to C20-hydrocarbon radical, provided that the radicals R1 and R2 can only be at one given time a hydroxyl radical in each hydrocarbon atom. The invention further relates to RTV-1-alkoxy masses comprising the reaction product containing organopolysiloxane terminated with alkoxy groups as the essential constituent.