Tacky fluoroelastomer compositions

Claim 1

A tacky fluoroelastomer gum stock composition, comprising a blend of: (a) an elastomeric fluoropolymer gum, said gum being a copolymer of monomers comprising vinylidene fluoride and at least one other terminally ethylenically unsaturated fluorine-containing comonomer; (b) from about 75 to about 750 parts by weight per one hundred parts by weight of said fluoropolymer gum, of a normally liquid fluoroaliphatic polyol, or a normally liquid mixture of two or more fluoroaliphatic polyols; and (c) about 1 to 20 millimoles per one hundred grams of said fluoropolymer gum, of one or more organo-onium cocuring agent(s) selected from the group consisting of organoammonium, organoarsonium, organophosphonium, or organosulfonium compounds which composition in reactive association with an acid acceptor forms a tacky curable gum stock composition which, upon exposure to heat, will cure into an elastomer.

Claim 11

A method of making a shaped article, comprising the steps of: (a) admixing with fluoropolymer gum, per one hundred grams thereof, from about 75 to 750 grams of normally liquid fluoroaliphatic polyol or normally liquid mixture of fluoroaliphatic polyols, said polyol(s) having: (1) carbon-carbon skeletal structure(s) which can be interrupted by oxygen atoms bonded only to carbon atoms, (2) non-skeletal valences of said structure(s) satisfied by H or F atoms, or OH or fluoroalkyl groups, with no more than 50% of such non-skeletal valences being satisfied by H atoms, and (3) for each said fluoroaliphatic polyol, at least two hydroxyl groups each bonded to carbon atoms bonded only to H atoms or fluoroalkyl groups; from about 4 to 30 millimoles of organo-onium cocuring agent selected from compounds of the formulas (i) (R.sup.1).sub.4 Q.sup.+1 (X.sup.-m).sub.1/m, (ii) (R.sup.1).sub.3 QR.sup.2 Q(R.sup.1).sub.3.sup.+2 (X.sup.-m).sub.2/m, (iii) (R.sup.3).sub.3 S.sup.+1 (X.sup.-m).sub.1/m, or (iv) (R.sup.3).sub.2 SR.sup.4 S(R.sup.3).sub.2.sup.+2 (X.sup.-m).sub.2/m wherein Q is a nitrogen, arsenic or phosphorus atom, S is sulfur, X - is an anion having a valence of m, each R 1 is a monovalent organic radical containing 1 to 20 carbon atoms, is the same as or different from any other R 1 , and can combine with another R 1 to form a cyclic structure containing a Q atom, R 2 is a divalent organic radical containing 2 to 12 carbon atoms, each R 3 is a monovalent organic radical containing 1 to 20 carbon atoms, is the same as or different from any other R 3 , and can combine with another R 3 to form a cyclic structure containing an S atom, R 4 is a divalent organic radical containing 2 to 12 carbon atoms; and at least one R 3 or R 4 group is aromatic; and from about 0.5 to 40 grams of acid acceptor;

Claim 12

A method of making a shaped article, comprising the steps of: (a) admixing with fluoropolymer gum, per one hundred grams thereof, from about 75 to 750 grams of normally liquid fluoroaliphatic polyol or normally liquid mixture of fluoroaliphatic polyols, said polyol(s) having: (1) carbon-carbon skeletal structure(s) which can be interrupted by oxygen atoms bonded only to carbon atoms, (2) non-skeletal valences of said structure(s) satisfied by H or F atoms, or OH or fluoroalkyl groups, with no more than 50% of such non-skeletal valences being satisfied by H atoms, and (3) for each said fluoroaliphatic polyol, at least two hydroxyl groups each bonded to carbon atoms bonded only to H atoms or fluoroalkyl groups; from about 4 to 30 millimoles of organo-onium cocuring agent selected from compounds of the formulas (i) (R.sup.1).sub.4 Q.sup.+1 (X.sup.-m).sub.1/m, (ii) (R.sup.1).sub.3 QR.sup.2 Q(R.sup.1).sub.3.sup.+2 (X.sup.-m).sub.2/m, (iii) (R.sup.3).sub.3 S.sup.+1 (X.sup.-m).sub.1/m, or (iv) (R.sup.3).sub.2 SR.sup.4 S(R.sup.3).sub.2.sup.+2 (X.sup.-m).sub.2/m wherein Q is a nitrogen, arsenic or phosphorus atom, S is sulfur, X - is an anion having a valence of m, each R 1 is a monovalent organic radical containing 1 to 20 carbon atoms, is the same as or different from any other R 1 , and can combine with another R 1 to form a cyclic structure containing a Q atom, R 2 is a divalent organic radical containing 2 to 12 carbon atoms, each R 3 is a monovalent organic radical containing 1 to 20 carbon atoms, is the same as or different from any other R 3 , and can combine with another R 3 to form a cyclic structure containing an S atom, R 4 is a divalent organic radical containing 2 to 12 carbon atoms; and at least one R 3 or R 4 group is aromatic; and from about 0.5 to 40 grams of acid acceptor;