Universal adhesion promoting composition for plastic repair kit including same, and method of use
First Claim
1. A priming composition suitable for use in priming a first plastic surface for adhesion of a second plastic material thereto, the composition comprising an epoxy resin and a priming solvent, the composition derived from the combination of:
- A. a first composition comprising a first organic material having a plurality of epoxy-functional groups, said first organic material combined with a first organic solvent in a sufficient amount of the first organic solvent to dissolve or disperse the first organic material in the first organic solvent, the first organic solvent comprising a combination of;
a. a hydrocarbon having from 4 to 10 carbon atoms;
b. an alcohol having from 3 to 10 carbon atoms; and
c. an ester having from 3 to 10 carbon atoms,with the proviso that the first organic material is soluble in the combination of a, b and c; and
B. a second composition comprising a second organic material comprising a major portion of a mercaptan-terminated polymer having a plurality of mercaptan-functional groups and a minor portion of an amine-functional material having a plurality of amine-functional groups, said second organic material combined with a second organic solvent in a sufficient amount of the second organic solvent to dissolve or disperse the second organic material in the second organic solvent, the second organic solvent comprising a combination of;
a'"'"'. a hydrocarbon having from 4 to 10 carbon atoms;
b'"'"'. an alcohol having from 3 to 10 carbon atoms; and
c'"'"'. a ketone having from 3 to 10 carbon atoms,with a proviso that the second organic material is soluble in the combination of a'"'"', b'"'"' and c'"'"', the second organic material and the first organic material present in an equivalent weight ratio ranging from about 4;
1 to about 1;
6, wherein the mixture of the first and second organic solvents comprise the priming solvent and the epoxy resin comprises a reaction product of said first and said second organic materials, the priming solvent present in an amount sufficient to wet and penetrate, but not be substantially retained in the first plastic surface where applied thereto.
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Abstract
Compositions and methods of use are presented suitable for use in priming a first plastic surface, such as an automobile bumper facie, for adhesion of a second plastic material thereto, such as an epoxy resin. The compositions comprise an epoxy resin and a priming solvent, where the epoxy resin is derived from the reaction product of a first organic material having a plurality of epoxy-functional groups and a second organic material, the second organic material being the combination of a material having a plurality of amine-functional groups and a material having a plurality of mercaptan-functional groups. The first and second organic materials are initially dissolved or dispersed in their respective organic solvents, the two solvents making up the priming solvent. The priming solvent is adapted to wet and penetrate but not be substantially retained by the first plastic surface where applied thereto. Kits useful in repairing plastic surfaces using the compositions of the invention are also presented.
32 Citations
9 Claims
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1. A priming composition suitable for use in priming a first plastic surface for adhesion of a second plastic material thereto, the composition comprising an epoxy resin and a priming solvent, the composition derived from the combination of:
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A. a first composition comprising a first organic material having a plurality of epoxy-functional groups, said first organic material combined with a first organic solvent in a sufficient amount of the first organic solvent to dissolve or disperse the first organic material in the first organic solvent, the first organic solvent comprising a combination of; a. a hydrocarbon having from 4 to 10 carbon atoms; b. an alcohol having from 3 to 10 carbon atoms; and c. an ester having from 3 to 10 carbon atoms, with the proviso that the first organic material is soluble in the combination of a, b and c; and B. a second composition comprising a second organic material comprising a major portion of a mercaptan-terminated polymer having a plurality of mercaptan-functional groups and a minor portion of an amine-functional material having a plurality of amine-functional groups, said second organic material combined with a second organic solvent in a sufficient amount of the second organic solvent to dissolve or disperse the second organic material in the second organic solvent, the second organic solvent comprising a combination of; a'"'"'. a hydrocarbon having from 4 to 10 carbon atoms; b'"'"'. an alcohol having from 3 to 10 carbon atoms; and c'"'"'. a ketone having from 3 to 10 carbon atoms, with a proviso that the second organic material is soluble in the combination of a'"'"', b'"'"' and c'"'"', the second organic material and the first organic material present in an equivalent weight ratio ranging from about 4;
1 to about 1;
6, wherein the mixture of the first and second organic solvents comprise the priming solvent and the epoxy resin comprises a reaction product of said first and said second organic materials, the priming solvent present in an amount sufficient to wet and penetrate, but not be substantially retained in the first plastic surface where applied thereto. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification