Reverse coating process using a lactam release agent

Details Reverse coating process using a lactam release agent Reverse coating process using a lactam release agent

1974-05-03

1976-04-27

Arnold, Donald J.

Plastic and nonmetallic article shaping or treating: processes

With step of cleaning, polishing, or preconditioning...

106 3822, 264 74, 264213, 264338, B29D 702, B29C 104

Patent

active

039535592

ABSTRACT:
A substrate to be used as a support for a release coating is provided with a powdery release support with a release agent which is substantially non-tacky by applying on the support an aqueous solution, dispersion or paste containing a lactam compound which is water soluble, swells in water or forms a paste with water, drying the resulting coating. The process comprises treating the release agent, drying the release agent, applying a polyurethane coating over the release support and then removing the polyurethane coating from the release support. The release agent is selected from lactams and addition compounds of lactams with water, oximes, amines, monofunctional or polyfunctional alcohol or thioalcohols and mixture thereof.

REFERENCES:
patent: 2566982 (1951-09-01), Clemens et al.
patent: 3277227 (1966-10-01), Kesseler
patent: 3413390 (1968-11-01), Heiss
patent: 3694530 (1972-09-01), Wolfe

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