Universal adhesion promoting composition for plastics repair, kit including same, and method of use

A method of repairing a first plastic surface with a second plastic material, said method comprising a sequence of steps of:

• (a) applying to said first plastic surface a priming composition comprising:
• (1) 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 said first organic solvent to dissolve or disperse said first organic material, the first organic solvent comprising the combination of:
• (i) a hydrocarbon having from 4 to 10 carbon atoms;
• (ii) an alcohol having from 3 to 10 carbon atoms;
• and
• (iii) an ester having from 3 to 10 carbon atoms,
• with a proviso that said first organic material is soluble in said combination of (i), (ii) and (iii);
• and
• (2) 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 said second organic solvent to dissolve or disperse said second organic material in said second organic solvent, said second organic solvent comprising the combination of:
• (i') a hydrocarbon having from 4 to 10 carbon atoms;
• (ii') an alcohol having from 3 to 10 carbon atoms;
• and
• (iii') a ketone having from 3 to 10 carbon atoms,
• with a proviso that said second organic material is soluble in said combination of (i'), (ii'), and (iii'), said second organic material and said first organic material present in an equivalent weight ratio ranging from about 4:1 to about 1:6;
• (b) scrubbing into said first plastic surface said priming composition with a nonwoven article while said first and second organic solvents wet and penetrate but are not substantially retained by said first plastic surface;
• (c) allowing said first plastic surface to stand for a duration of time sufficient to facilitate substantially complete evaporation of said first and second organic solvents;
• (d) allowing said first organic material and said second organic material to substantially react to form an epoxy resin;
• (e) applying to said first plastic surface after step (d), a curable plastic mixture;
• (f) allowing said curable plastic mixture to cure to form a cured plastic mixture;
• and
• (g) abrading said cured plastic mixture and said first plastic surface after step (f) with an abrasive article, thus forming a featheredge boundary between said first plastic surface and said cured plastic mixture.