Back to results
US 4,912,171 AGranted
Fluoroelastomer curing process with phosphonium compound
AssigneeMinnesota Mining and Manufacturing Company
InventorsWerner M. A. Grootaert, Robert E. Kolb
Life of this patent
Estimating the term…
Abstract
A fluoroelastomer composition curable in reactive admixture with an acid acceptor that includes an elastomeric gum consisting essentially of vinylidene fluoride, tetrafluoroethylene, and copolymerizable hydrocarbon olefin and a combination of (A) polyhydroxy compound, and (B) organo-onium compound, and process of curing the elastomeric copolymer with an admixture of (A) and (B) and an acid acceptor, and the resulting shaped or formed, cured articles are described.
Claims22
A process of curing an elastomeric composition comprising the steps of:
- (A) providing a mixture of
- (i) saturated elastomer gum consisting essentially of repeating interpolymerized units derived from vinylidene fluoride, tetrafluorethylene, and copolymerizable hydrocarbon olefin, and
- (ii) 0.3 to 10 millimoles of polyhydroxy compound per one hundred grams of said gum,
- (iii) 0.2 to 10 millimoles of organo-onium compound per one hundred grams of said gum, and
- (iv) acid acceptor,
- except when said gum is derived from vinylidene fluoride, tetrafluoroethylene and propylene, and said polyhydroxy compound is hexafluoroisopropylidene-bis-(4-hydroxybenzene), and said organo-onium compound is a phosphonium compound, when said organo-onium compound is other than benzyltriphenylphosphonium chloride,
- (B) shaping said mixture, and
- (C) curing the resulting shaped article.
5 more elements
Dependencies are inferred from the claim text.