Enhancing solvent barrier property of pigmented polymeric bodies

Details Enhancing solvent barrier property of pigmented polymeric bodies Enhancing solvent barrier property of pigmented polymeric bodies

1977-08-01

1979-05-08

Thurlow, Jeffery R.

Plastic and nonmetallic article shaping or treating: processes

Reactive gas or vapor treatment of work

Work is organic material

106309, 264 85, 264516, 264573, 264102, 264345, B29C 2500

Patent

active

041536592

ABSTRACT:
The solvent barrier property of pigmented, solid polymeric articles is improved by pretreating the pigment particles prior to incorporation into the solid polymeric material so as to remove trapped gas from the surface and interstices of the pigment particles. Specific techniques for accomplishing this result include heating the pigment particles to a temperature above about 50.degree. C., but below the calcination temperature, scrubbing the pigment particles with an inert gas and subjecting the pigment particles to a vacuum.

REFERENCES:
patent: 2378539 (1945-06-01), Dawihl
patent: 2497046 (1950-02-01), Kropa
patent: 2724860 (1955-11-01), Strong
patent: 2811468 (1957-10-01), Joffre
patent: 3002846 (1961-10-01), Flasch
patent: 3441387 (1969-04-01), Dye
patent: 3862284 (1975-01-01), Dixon et al.

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