Primers for polymerizable acrylate-chlorosulfonated polyethylene adhesives and two-part adhesives prepared therewith
AssigneeNational Starch and Chemical Corporation
InventorJulius Sirota
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Abstract
Primer compositions useful in the cure of adhesive compositions containing acrylate and/or methacrylate monomers, chlorosulfonated polyethylene and a peroxy free radical generator comprise (a) the condensation product of an aldehyde and a primary or secondary amine and (b) a salt of a non-transition metal selected from the group consisting of lead, tin, zinc, calcium, strontium, barium and cadmium. These primers and the two part adhesives prepared therewith are characterized by superior speed of cure and final bond strength.
Claims9
A primer for peroxy initiated chlorosulfonated polyethylene/acrylate or methacrylate adhesives comprising (a) the condensation product of an aldehyde and a primary or secondary amine and (b) a salt of a non-transition metal selected from the group consisting of lead, tin, zinc, calcium, strontium, barium and cadmium wherein the ratio of the aldehyde-amine condensation product to the salt of a non-transition metal is from about 1:1 to about 15:1.
A two-part adhesive which comprises a joined mixture of (1) an acrylate or methacrylate monomer, a chlorosulfonated polyethylene and a peroxy polymerization initiator and (2) an aldehyde-amine condensation product and a salt of a non-transition metal selected from the group consisting of lead, tin, zinc, calcium, barium, strontium and cadmium wherein the aldehyde-amine condensation product is used in an amount of 0.15 to 5% and the non-transition metal salt in an amount of 0.00001 to 0.5% by weight of the adhesive composition and wherein the ratio of the aldehyde-amine condensation product to the non-transition metal salt is within the range of 1:1 to 15:1.
Dependencies are inferred from the claim text.