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AssigneeLoctite (Ireland) Limited
InventorsJohn G. Woods, John Rooney, Bernard Ryan, David Phelan
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Polymers comprising a polymer backbone having pendant or terminal betadiketone groups which contain at least one trifluoromethyl group. The betadiketone groups may be selected from trifluorocetoacetate groups (general formula I); ##STR1## hexafluoroacetylacetone groups (general formula II); ##STR2## or trifluoro-2,4-pentanedione groups (general formula III); ##STR3## where indicates the polymer backbone, R is an alkyl, substituted alkyl, aryl or substituted aryl group and R.sup.1 is hydrogen, alkyl or substituted alkyl. Neither the R group nor the R.sup.1 group should contain any group which is sufficiently basic to initiate cyanoacrylate polymerization or any group sufficiently acidic to interfere with chain transfer.
Polymerizable compositions comprising a cyanoacrylate and a polymer comprising a polymer backbone having pendant or terminal betadiketone groups which contain at least one trifluoromethyl group, said polymer being compatible with the cyanoacrylate monomer and being free of any group which is sufficiently basic to initiate cyanoacrylate polymerization or any group which is sufficiently acidic to interfere with chain transfer.
A process for producing a cyanoacrylate graft copolymer comprising reacting cyanoacrylate monomer with a polymer comprising a polymer backbone having pendant or terminal betadiketone groups which contain at least one trifluoromethyl group, said polymer being compatible with the cyanoacrylate monomer and being free of any group which is sufficiently basic to initiate cyanoacrylate polymerization or any group which is sufficiently acidic to interfere with chain transfer in the presence of a base.
Dependencies are inferred from the claim text.