Method for coating nylon-6 for improved thermal stability

Details Method for coating nylon-6 for improved thermal stability Method for coating nylon-6 for improved thermal stability

1987-09-29

1988-05-17

Page, Thurman K.

Coating processes

Particles, flakes, or granules coated or encapsulated

Resin base

42721336, 427307, 427322, B05D 700

Patent

active

047450061

ABSTRACT:
In a process for the production of heat stabilized nylon-6, hot nylon pellets are directly sprayed with measured quantities of concentrated solutions of copper salts and inorganic halides. For soluble cupric salts, the pellets are sprayed with a first solution comprising the soluble cupric salt and a second solution comprising the halide. Separate solutions are utilized when necessary to avoid precipitation problems. For cuprous salts solubilized in concentrated halide solution, a single solution may be prepared for spraying. Rapid absorption of copper by nylon eliminates precipitation and subsequent loss of the chemicals or discoloration of products.

REFERENCES:
patent: 2705227 (1955-03-01), Stamatoff
patent: 4012557 (1977-03-01), Cornelis
patent: 4256785 (1981-03-01), Dannelly

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