Bonding polyamides

Photolytic cleavage of the amide bond [POLYAMIDES - GENERAL] (Vol 19)... 

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... 

As adhesives based on ethylene-vinyl acetate copolymers cover a very wide range of applications, they are used in large quantities. In the case of higher demands on the bond, polyamide- or polyolefin-based hot-melt adhesives are recommended. Highest... 

Suitable for bonding polyamide textiles to natural and synthetic rubbers... 

Nitrile rubber/phenolic adhesives are also quite useful in adhering rubber to various met-als, " e.g., in the manufacture of rubber covered metal rollers. Huber reported that a nitrile/phenolic adhesive composition provided excellent bonding of rubber to a magnesium roll (Table 20). Other metal bonding applications with nitrile rubber/phenolic adhesives include laminating aluminum foil to paper and then to wood, bonding abrasives to metal, and bonding polyamide to metal. 

Adventitious routes to partially blocky copolyamides have been mentioned in an earlier section, and block copolymer syntheses by conventional random block copolymerization and by oligomer combination reactions are summarized in Tables 3 and 4. It should be noted that the high melting points and restricted solubilities which are the source of useful properties in intermolecularly hydrogen-bonded polyamides and analogous polymers are also a frequent source of practical difficulties in the preparation of their block copolymers. 

---