Flame-repellent polysiloxane molding compositions

US4419474A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Jurgen Ackermann · Bensberg, DE
• Hans-Heinrich Moretto · Cologne, DE
• Wilfried Kniege · Bensberg, DE
• Werner Rauer · Leverkusen, DE

Key dates

• Filing date: Oct 20, 1981
• Grant date: Dec 6, 1983
• Expiry date: Oct 20, 2001

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08K13/02
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

In a polysiloxane molding composition which can be cured to give flame-repellent products, comprising PA1 (a) a diorganopolysiloxane of the formula ##EQU1## in which n is 1.9 to 2.05, and PA2 R.sup.1 is an alkyl, alkenyl and/or or aryl radical with 1-8 C-atoms, PA1 (b) finely divided TiO.sub.2 with a surface area, measured by the BET method, greater than 20 m.sup.2 /g and a particle size less than 0.5 .mu.m, PA1 (d) platinum and/or one of its sulphur-free compounds, and PA1 (e) a curing agent, the improvement which comprises about 0.05 to 10% by weight of (a) to (e) of nitrogen compound of the formula ##STR1## in which R is H, phenyl, alkyl with 1-6 C-atoms, tolyl, nitrile, --NHR.sup.2, --CH.sub.2 OR.sup.2, --CH.sub.2 COOR.sup.2, --C(.dbd.NH)NHR.sup.2, --CO--NH--R.sup.2 or (R.sup.1).sub.2 C--, PA1 R.sub.2.sup.1 is H, alkyl with 1-6 C-atoms, Si(CH.sub.3).sub.3 -- or R, PA1 R.sup.2 is H or --CO--R, and PA1 Z is NH, O or NR, or a salt thereof. Articles molded therefrom and then cured are of enhanced flame-repellency.