Intumescent thermoplastic polyamide graft polymers

Details Intumescent thermoplastic polyamide graft polymers Intumescent thermoplastic polyamide graft polymers

1997-02-13

1998-05-26

Short, Patricia A.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524445, 524606, 525420, 525424, 525426, 525432, C08G 6948

Patent

active

057565716

ABSTRACT:
An intumescent fire retardant graft polyamide polymer aving resistance to dripping on exposure to fire, and the method of making such graft polyamide polymers, comprising from about 10-40 percent by weight of a melamine compound, 40-95 percent of a thermoplastic polyamide polymer, and 1-10 percent of an oligomer containing 1-4 monomer units of, or reactive with, the polyamide polymer. The graft polymer is formed at about the melting temperature of the polyamide. Caprolactam, and adipic acid-hexamethylene diamine oligomers perform well in forming the graft polyamides with melamine compounds. Effective melamine compounds are melamine, melamine cyanurate, melamine phosphate, melamine borate, methylol melamine, and trimelamine isocyanurate. Extraneous materials such as fiber, glass, and antioxidants may be added to affect the physical properties of the product.

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