RTV Silicone pastes

US4585849A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Franz Saykowski · Cologne, DE
• Thomas Wurminghausen · Leverkusen, DE
• Hans Stattlegger · Odenthal, DE
• Theo Achtenberg · Leverkusen, DE

Key dates

• Filing date: Sep 26, 1984
• Grant date: Apr 29, 1986
• Expiry date: Sep 26, 2004

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S528/901
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

In a polydiorganosilixane composition which is capable of storage in the absence of moisture and can be cured at ambient temperature under the action of water or moisture to give elastomers, the composition comprising a diorganosiloxane having reactive terminal groups, a diorganosilane having groups which are sensitive to hydrolysis, a cross-linking agent, and optionally fillers which have a thixotropic effect, condensation catalysts and/or other known auxiliaries, the improvement which comprises employing as the silane (a) a silane of the formula EQU RR.sup.1 Si(NR.sup.2 R.sup.3).sub.2 plus (b) an organosilane of the formula EQU RSi (O--N.dbd.R.sup.4).sub.3 in which PA1 R, R.sup.1, R.sup.2 and R.sup.3 each independently is alkyl, aryl, aralkyl and vinyl groups, or PA1 R.sup.2 and R.sup.3 together can be an alkanediyl radical having up to 8 C atoms or hydrogen, and PA1 R.sup.4 is an R.sup.2 R.sup.3 C group having up to 8 C atoms. The composition cures at room temperature in the presence of moisture to elastomers of desirable physical properties.