Resorcinol-formaldehyde primer

Polyamide (nylon) Acetone, methyl ethyl ketone 1. Abrasion. Grit or vapor blast or abrade with 100-grit emery cloth followed by solvent degreasing. 2. Prime with a spreading dough based on the type of rubber to be bonded in an admixture with isocyanate. 3. Prime with resorcinol formaldehyde adhesives. Sand or steel shot is suitable abrasive Suitable for bonding polyamide textiles to natural and synthetic rubbers Good adhesion to primer coat with epoxy adhesives in metal-to-plastic joints... 

S/B, interior vapor barrier primer Dehysol R Resorcinol-formaldehyde resin... 

Suggested adhesives include modified acrylics, epoxies, polyesters, resorcinol-formaldehyde, furane, phenol-formaldehyde, polyvinyl formal-phenolic, polyvinyl butyral, nitrile rubber-phenolic, polyisobutylene rubber, polyurethane rubber, reclaimed rubber, melamine-formaldehyde, epoxy-phenolic, and cyanoacrylates. For maximum adhesion primers should be used. Nitrile-phenoUcs give excellent bonds if cured under pressure at temperatures of 149 C. Lower-strength bonds are obtained with most rubber-based adhesives. 

Prime with resorcinol-formaldehyde adhesive Good adhesion to primer coat with epoxy adhesives in metal-plastic joints... 

Bonding or priming should be carried out as soon as possible. Parts should be warmed slightly before bonding. Primers recommended include nitrile-phenolic, resorcinol-formaldehyde, vinyl phenolic, silane, and so on. Epoxies have been used on metallic surfaces, with the nylon being bonded to the epoxy. 

The second is a two-component adhesive " component A is a m-aminophenol modified novolac at a pH of 5 (about 63% solids) and component is a formaldehyde donor used as hardener. The adhesive has gap-filling capability, impact resistance, and is thixotropic. A phenol-resorcinol laminating resin can be used as a primer, with good results. 

No discussion of self-bonding elastomers and their possible adhesion mechanisms would be complete without reference to the most widely used system in this category. This is the approach of elastomer additives comprised of silica, resorcinol and formaldehyde donor (or "SRB if hexamethylene tetramine is the formaldehyde carrier). In many practical cases, such additives are able to promote enough adhesion to textile fibers or even metal substrates that use of a primer or tie-coat proper can be obviated. 

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