Energy curable compositions: two component curing agents
AssigneeMinnesota Mining and Manufacturing Company
InventorsMichael C. Palazzotto, Robert J. DeVoe
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Abstract
A polymerizable composition comprises a polymeric precursor selected from the group consisting of (1) at least one ethylenically-unsaturated monomer, optionally in combination with an epoxy monomer or polyurethane precursors, or (2) at least one epoxy monomer, or (3) polyurethane precursors, and a curing agent comprising an organometallic salt and an onium salt.
Claims42
A method comprising the steps of:
- (a) providing a mixture comprising a polymeric precursor composition selected from the group consisting of
- (1) at least one di- and polysiocyanates, and at least one compound bearing at least two isocyanate-reactive hydrogen aotms, the isocyanate and reactive hydrogen-containing compound constituting polyurethane precursors, and
- (2) at least one ethylenically-unsaturated compound, at least one isocyanate selected from di- and polyisocyanates, and at least one compound bearing at least two isocyanate-reactive hydrogen atoms, the isocyanate and reactive hydrogen-containing compound constituting polyurethane precursors, and
- a catalytically effective amount of a two-component curing agent for (1) and (2) comprising
- (1) an organometallic salt, and
- (2) an onium salt;
- (b) allowing said mixture to polymerize or adding energy to said mixture to effect polymerization.
The method according to claim l wherein said polyurethane precursors comprise a mixture of polyisocyanates and compounds bearing at least two isocyanate-reactive hydrogen atoms where the ratio of isocyanate groups to isocyanate-reactive hydrogen atoms is in the range 1:2 to 2:1.
A polymerizable composition comprising a polymeric precursor selected from one of the groups consisting of
- (1) at least one isocyanate selected from di- and polyisocyanates, and at least one compound bearing at least two isocyanate-reactive hydrogen atoms, the isocyanate and reactive hydrogen-containing compound constituting polyurethane precursors, and
- (2) at least one ethylenically-unsaturated monomer, at least one isocyanate selected from di- and polyisocyanates, and at least one compound bearing at least two isocyanate-reactive hydrogen atoms, the isocyanate and reactive hydrogen-containing compound constituting polyurethane precursors, and a two-component curing agent for (1) and (2) comprising an organometallic salt and an onium salt.
Dependencies are inferred from the claim text.