C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
402/17, 400/2007
C08G 77/28 (2006.01) C08G 75/14 (2006.01) C08K 3/18 (2006.01) C08K 5/56 (2006.01) C08L 83/10 (2006.01) C09K 3/10 (2006.01)
Patent
CA 1151338
ABSTRACT Compositions which are stable in the absence of oxygen are obtained by mixing the following substantially in the absence of oxygen (A) 100 parts by weight of an ingredient selected from either (1) at least one mercapto-functional copolymer, said copolymer containing both silicon-free organic segments and organosiloxane segments or (2) a mixture of at least two different types of components selected from the following types (a) at least one copolymer as described in (A)(1) above, (b) at least one silicon-free mercapto-functional organic compound and (c) at least one mercapto-functional organosilane or organosiloxane; (B) 0 to 200 parts of at least one filler; and (C) a catalytic amount, preferably from 0.1 to 6 parts, of a metal carbonyl catalyst selected from the group consisting of Fe(CO)5, Fe2(CO)9, Fe3(CO)12, dicyclopentadienyldiiron tetracarbonyl, butadieneiron tricarbonyl, cyclohexadiene- iron tricarbonyl, Ni(CO)4, dicyclopentadienyldinickel dicarbonyl, Mn2(CO)10, methylcyclopentadienylmanganese tricarbonyl and dicyclopentadienylcobalt dicarbonyl. Such compositions polymerize or cure to form higher molecular weight product upon exposure to oxygen at room temperature. The higher molecular weight products formed are useful as coatings, impregnants for porous materials and elastomeric sealants. Cured products possessing a combination of some of the advantages possessed by organosiloxanes and some of the advantages possessed by organic polymers are easily obtained by exposing these compositions to oxygen.
365082
Homan Gary R.
Lee Chi-Long
Dow Corning Corporation
Gowling Lafleur Henderson Llp
LandOfFree
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