Enhancing solvent barrier property of pigmented polymeric...

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

C - Chemistry, Metallurgy

08

J

18/1182, 183/5,

C08J 7/12 (2006.01) C08K 9/00 (2006.01) C09B 67/00 (2006.01) C09C 1/36 (2006.01) C09C 3/04 (2006.01)

Patent

CA 1100254

ABSTRACT The solvent barrier property of pigmented, solid poly- meric 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°C, but below the calcination temperature, scrubbing the pigment particles with an inert gas and subjecting the pigment particles to a vacuum.

308547

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