Abstract This invention relates to a heat curable composition comprising (a) a liquid, ethylenically unsaturated monomer, oligomer or prepolymer of the formula: <IMAGE> wherein R is H or CH3, R1 is an organic moiety and n is at least 2, (b) an epoxy resin containing at least two <IMAGE> groups, and (c) a thermal initiator member of the group consisting of (1) a substituted or unsubstituted diaryliodonium salt in combination with a free radical initiator, (2) a BF3 adduct, (3) a BF3 adduct in combination with a free radical initiator, and (4) dicyandiamide in combination with a free radical initiator. The system is stable at ordinary temperatures, but on heating the thermal initiator catalyzes the curing of the acrylate and the epoxy resin.
A process for forming a coating on a substrate which comprises admixing a heat curable composition comprising (a) a liquid, ethylenically unsaturated monomer, oligomer or prepolymer of the formula: ##STR13## wherein R is H or CH 3 , R 1 is an organic moiety and n is at least 2, (b) an epoxy resin containing at least two ##STR14## groups, and (c) a thermal initiator member of the group consisting of (1) a BF 3 adduct in combination with a free radical initiator, and (2) dicyandiamide in combination with a free radical initiator, coating said admixture on a substrate and heating said coating in the range 80°-300° C. to affect curing.
Claim 2
Dependent Claim
111 words
A process for forming a coating on a substrate which comprises admixing a heat curable composition comprising (a) a liquid, ethylenically unsaturated monomer, oligomer or prepolymer of the formula: ##STR13## wherein R is H or CH 3 , R 1 is an organic moiety and n is at least 2, (b) an epoxy resin containing at least two ##STR14## groups, and (c) a thermal initiator member of the group consisting of (1) a BF 3 adduct in combination with a free radical initiator, and (2) dicyandiamide in combination with a free radical initiator, coating said admixture on a substrate and heating said coating in the range 80°-300° C. to affect curing.
Claim 3
Dependent Claim
16 words
The process according to claim 1 wherein the heating step is carried out by electromagnetic heating.
Claim 4
Dependent Claim
14 words
The process according to claim 2 wherein the electromagnetic heating is by dielectric heating.
Claim 5
Dependent Claim
14 words
The process according to claim 2 wherein the electromagnetic heating is by induction heating.