Thermocurable compositions

US5162452A · kind A · utility

Assignee

• Wacker Chemie AG · DE

Inventors

• Christian Herzig · Waging am See, DE
• Bernward Deubzer · Burghausen, DE
• Josef Esterbauer · Bodelshausen, DE

Key dates

• Filing date: May 30, 1990
• Grant date: Nov 10, 1992
• Expiry date: May 30, 2010

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L83/08
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The Thermocurable compositions which contain PA1 (A) at least one mercaptoalkyl-containing compound which contains at least two SiC-bonded radicals per molecule of the general formula EQU HS--R.sup.2 -- (I) PA1 where R.sup.2 represents a divalent hydrocarbon radical having from 1 to 8 carbon atom(s) per radical, selected from the group consisting mercaptoalkyl-containing organopolysiloxanes and cocondensates of mercaptoalkyl-containing organosilicon compounds containing groups capable of condensation, and hydroxyl-containing organic compounds, PA1 (B) at least one vinyl-containing compound which is compatible with constituent (A) and contains at least two groups per molecule of the general formula EQU R.sup.4 CH.dbd.CR.sup.3 C(O)O-- (II) PA1 where R.sup.3 represents a hydrogen atom or a methyl radical, and R.sup.4 represents a hydrogen atom or an alkyl radical having from 1 to 3 carbon atom(s) per radical, and PA1 (C) a mixture of a strong organic base selected from the group consisting of quaternary ammonium hydroxides, quaternary ammonium alkoxides, tertiary, secondary and primary amines, and a weak protonic acid.