Method for improving adhesion between adhesives and polyester or other thermoplastic substrates

Claim 1

The method for improving the adhesion between an adhesive of the class of polymerizable liquid ethylenically unsaturated compounds containing a single terminal >C=CH 2 group and a substrate selected from the group consisting of solid polyester and other solid thermoplastic compositions comprising treating said substrate with a solution consisting essentially of from about 0.85 to about 40 parts by weight of a first partial urethane adduct and a second partial urethane adduct in 60 to 100 parts of a low boiling, inert organic solvent, said first partial urethane adduct being the reaction product of from about 0.1 to about 0.7 molar equivalent weight of a hydroxy functional monomer and 1 molar equivalent weight of polyisocyanate of tri or higher functionality, said second partial urethane adduct being the reaction product of from about 0.05 to about 0.35 molar equivalent of a hydroxylated butadiene polymer or copolymer and 1 molar equivalent weight of a polyisocyanate of tri or higher functionality, said first and second partial urethane adducts being combined in said solution in a proportion ranging from 1:0.2 to 0.2:1; applying an adhesive of the class of polymerizable liquid ethylenically unsaturated compounds containing a single terminal >C=CH 2 group to said treated substrate and curing said adhesive.

Claim 2

The method for improving the adhesion between an adhesive of the class of polymerizable liquid ethylenically unsaturated compounds containing a single terminal >C=CH 2 group and a substrate selected from the group consisting of solid polyester and other solid thermoplastic compositions comprising treating said substrate with a solution consisting essentially of from about 0.85 to about 40 parts by weight of a first partial urethane adduct and a second partial urethane adduct in 60 to 100 parts of a low boiling, inert organic solvent, said first partial urethane adduct being the reaction product of from about 0.1 to about 0.7 molar equivalent weight of a hydroxy functional monomer and 1 molar equivalent weight of polyisocyanate of tri or higher functionality, said second partial urethane adduct being the reaction product of from about 0.05 to about 0.35 molar equivalent of a hydroxylated butadiene polymer or copolymer and 1 molar equivalent weight of a polyisocyanate of tri or higher functionality, said first and second partial urethane adducts being combined in said solution in a proportion ranging from 1:0.2 to 0.2:1; applying an adhesive of the class of polymerizable liquid ethylenically unsaturated compounds containing a single terminal >C=CH 2 group to said treated substrate and curing said adhesive.

Claim 4

The method for improving the adhesion between an adhesive of the class of polymerizable liquid ethylenically unsaturated compounds containing a single termianl >C=CH 2 group and a substrate selected from the group consisting of solid polyester and other solid thermoplastic compositions comprising treating said substrate with a solution consisting essentially of from about 0.85 to about 40 parts by weight of a partial urethane adduct in 60 to 100 parts by weight of a low boiling, inert organic solvent, and from about 0.3 to about 10%, by weight, based on the weight of the solution, of a terephthalate polyester formed from the reaction of an organic polyol and terephthalic acid or terephthalic anhydride, said partial urethane adduct being the reaction product of from about 0.1 to about 0.7 molar equivalent weight of a hydroxy functional monomer and 1 molar equivalent weight of polyisocyanate of tri or higher functionality; applying an adhesive of the class of polymerizable liquid ethylenically unsaturated compounds containing a single terminal >C=CH 2 group to said treated substrate and curing said adhesive.

Claim 5

The method for improving the adhesion between an adhesive of the class of polymerizable liquid ethylenically unsaturated compounds containing a single termianl >C=CH 2 group and a substrate selected from the group consisting of solid polyester and other solid thermoplastic compositions comprising treating said substrate with a solution consisting essentially of from about 0.85 to about 40 parts by weight of a partial urethane adduct in 60 to 100 parts by weight of a low boiling, inert organic solvent, and from about 0.3 to about 10%, by weight, based on the weight of the solution, of a terephthalate polyester formed from the reaction of an organic polyol and terephthalic acid or terephthalic anhydride, said partial urethane adduct being the reaction product of from about 0.1 to about 0.7 molar equivalent weight of a hydroxy functional monomer and 1 molar equivalent weight of polyisocyanate of tri or higher functionality; applying an adhesive of the class of polymerizable liquid ethylenically unsaturated compounds containing a single terminal >C=CH 2 group to said treated substrate and curing said adhesive.

Claim 6

The method for improving the adhesion between an adhesive of the class of polymerizable liquid ethylenically unsaturated compounds containing a single terminal >C=CH 2 group and a substrate selected from the group consisting of solid polyester and other solid thermoplastic compositions comprising treating said substrate with a solution consisting essentially of from about 0.85 to about 40 parts by weight of a first partial urethane adduct and a second partial urethane adduct in 60 to 100 parts of a low boiling, inert organic solvent, and from about 0.3 to about 10%, by weight, based on the weight of the solution, of a tetephthalate polyester formed from the reaction of an organic polyol and terephthalic acid or terephthalic anhydride, said first partial urethane adduct being the reaction product of from about 0.1 to about 0.7 molar equivalent weight of a hydroxy functional monomer and 1 molar equivalent weight of polyisocyanate of tri or higher functionality, said second partial urethane adduct being the reaction product of from about 0.05 to about 0.35 molar equivalent weight of a hydroxylated butadiene polymer or copolymer and 1 molar equivalent weight of a polyisocyanate of tri or higher functionality, said first and second partial urethane adducts being combined in said solution in a proportion ranging from 1:0.2 to 0.2:1; applying an adhesive of the class of polymerizable liquid ethylenically unsaturated compounds containing a single terminal >C=CH 2 group to said substrate and curing said adhesive.

Claim 7

The method for improving the adhesion between an adhesive of the class of polymerizable liquid ethylenically unsaturated compounds containing a single terminal >C=CH 2 group and a substrate selected from the group consisting of solid polyester and other solid thermoplastic compositions comprising treating said substrate with a solution consisting essentially of from about 0.85 to about 40 parts by weight of a first partial urethane adduct and a second partial urethane adduct in 60 to 100 parts of a low boiling, inert organic solvent, and from about 0.3 to about 10%, by weight, based on the weight of the solution, of a tetephthalate polyester formed from the reaction of an organic polyol and terephthalic acid or terephthalic anhydride, said first partial urethane adduct being the reaction product of from about 0.1 to about 0.7 molar equivalent weight of a hydroxy functional monomer and 1 molar equivalent weight of polyisocyanate of tri or higher functionality, said second partial urethane adduct being the reaction product of from about 0.05 to about 0.35 molar equivalent weight of a hydroxylated butadiene polymer or copolymer and 1 molar equivalent weight of a polyisocyanate of tri or higher functionality, said first and second partial urethane adducts being combined in said solution in a proportion ranging from 1:0.2 to 0.2:1; applying an adhesive of the class of polymerizable liquid ethylenically unsaturated compounds containing a single terminal >C=CH 2 group to said substrate and curing said adhesive.

Claim 8

A method for improving the adhesion between an adhesive of the class of polymerizable liquid ethylenically unsaturated compounds containing a single terminal >C=CH 2 group and a substrate selected from the group consisting of solid polyester and other solid thermoplastic compositions comprising treating said substrate with a solution containing about 0.85 to about 40 parts, by weight, of a partial urethane adduct in 60 to 100 parts of a low boiling, inert organic solvent, said partial urethane adduct being the reaction product of from about 0.1 to about 0.7 molar equivalent weight of a hydroxy functional monomer and 1 molar equivalent weight of polyisocyanate of tri or higher functionality, applying an adhesive of the class of polymerizable liquid ethylenically unsaturated compounds containing a single terminal >C=CH 2 group to said treated substrate and curing said adhesive.

Claim 9

A method for improving the adhesion between an adhesive of the class of polymerizable liquid ethylenically unsaturated compounds containing a single terminal >C=CH 2 group and a substrate selected from the group consisting of solid polyester and other solid thermoplastic compositions comprising treating said substrate with a solution containing about 0.85 to about 40 parts, by weight, of a partial urethane adduct in 60 to 100 parts of a low boiling, inert organic solvent, said partial urethane adduct being the reaction product of from about 0.1 to about 0.7 molar equivalent weight of a hydroxy functional monomer and 1 molar equivalent weight of polyisocyanate of tri or higher functionality, applying an adhesive of the class of polymerizable liquid ethylenically unsaturated compounds containing a single terminal >C=CH 2 group to said treated substrate and curing said adhesive.