Post-treatment of a polymeric composition

Details Post-treatment of a polymeric composition Post-treatment of a polymeric composition

2005-03-29

2005-03-29

Pezzuto, Helen L. (Department: 1713)

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

C524S023000, C524S808000, C525S326900, C525S342000, C525S374000, C525S375000, C525S384000

Reexamination Certificate

active

06872787

ABSTRACT:
A post-treatment process for making a water-resistant polymeric composition which is inkjet printable, or in the form of a strongly-swellable gel, includes providing a stable, aqueous two-phase polymeric composition by the steps of forming a reaction mixture in a reaction vessel which includes a water-soluble vinyl monomer, optionally with one or more water-soluble comonomers, a first amount of a multi-vinyl crosslinking agent, and water, heating the mixture, then periodically adding a predetermined amount of a free radical initiator, and polymerizing the reaction mixture, optionally removing the resultant two-phase polymeric composition from the reaction vessel, adding a predetermined amount of a post-treatment crosslinker, optionally blending with a proteinaceous or other water compatible polymer material thereto, optionally coating the mixture onto a support, and optionally heating at room temperature or above, to increase the viscosity of the composition in a predetermined manner.

REFERENCES:
patent: 5731365 (1998-03-01), Engelhardt et al.
patent: 6133369 (2000-10-01), Houben et al.
patent: 6187872 (2001-02-01), Yanase et al.
patent: 6297335 (2001-10-01), Funk et al.
patent: 6565768 (2003-05-01), Dentler et al.
patent: 6713538 (2004-03-01), Hood et al.

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