Isp Investments Inc.

Gaf Chemicals Corporation

Yoon T Kwak

Stephen L Kopolow

Mohammed Tazi

Robert B Login

David K Hood

Michael A Tallon

Drupesh Patel

Laurence Senak

John G Mc Kittrick

Michael W Helioff

Krystyna Plochocka

Kolazi S Narayanan

Paul D Taylor

William E Prosise

Rama K Haldar

Edward W Walls, Jr

Balgopal Gangadharan

William James Swatos

John M C Kittrick

Alan J Carlin

Mohammed Tzai

Thomas Rizzo

A process for making high specific viscosity copolymers of maleic anhydride and an alkyl vinyl either having as specific viscosity of at least 7, preferably 10-50, are made by copolymerizing maleic anhydride and an alkly vinyl ether monomers in the presence of added acetylene.

Process for making copolymers of maleic anhydride and alkyl vinyl ether of high specific viscosity

A post-treatment process for making a water-resistant polymeric coating composition or a strongly-swellable polymeric 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, first amount of a crosslinking agent, and water, heating the mixture, then periodically adding a predetermined amount of an initiator, and polymerizing at about 30-130&deg; C., optionally removing the resultant two-phase composition from the reaction vessel, adding a predetermined amount of an additional crosslinker or proteinaceous compound thereto, optionally coating the mixture onto a support, and optionally heating to further polymerize the mixture.

Post-treatment of a polymeric composition

A method of color inkjet printing on a substrate coated with a substantially colorless, 90-10 to 30-70, wt/wt, copolymer of vinyl pyrrolidone and vinyl imidazole, by inkjet printing dye images on the thus-coated substrate, characterized in that the dye images obtained exhibit excellent light fastness.

Substrate for color inkjet printing

A process for making a solution of a copolymer of maleic anhydride (MA) and methyl vinyl ether (MVE) monomers the specific viscosity (SV) of the product being about 2.5-6, preferably 3-5, indicating a weight average molecular weight of substantially above one million, preferably above 1.5 million and a solids content of about 20-45%, preferably 30-40, in isopropyl acetate (IPAc), solvent includes the steps of (a) precharging part of MVE in IPAc into a reactor heated to about 50-90&deg; C., and then (b) feeding (i) a solution of MA in IPAc, (ii) the rest of MVE, at a mole ratio of MA:MVE of 1:&gE;1.5 to 1:<3, preferably 1:2.4, and (iii) a free radical initiator dissolved in IPAc, in an amount of 0.02-0.3%, preferably 0.05-0.2%, based on total monomers, into the reactor over time. Powders of such MA/MVE copolymers are made by removing the solvent from the solution.

Process for making a solution of copolymers of maleic anhydride and alkyl vinyl ether in isopropyl acetate of high specific viscosity and at a high solids level

What is described herein is a process for preparing a lightly-crosslinked copolymer of (a) vinyl pyrrolidone (VP) and (b) dimethylaminopropyl methacrylamide (DMAPMA) under more reproducible conditions. Suitably the weight ratio of (a):(b) is 50-95:50-5, preferably 80:20. The copolymer has a Brookfield viscosity of 5,000 to 45,000 cps; preferably 10,000 to 30,000 cps, and a haze of <100 NTU; it includes about 0.1 to 0.5 wt. %, preferably 0.2 to 0.4 wt. %, of a cross-linking agent based upon the total weight of the monomers in the copolymer.

Water-resistant color inkjet receptive films

A stable, aqueous polymeric composition which forms a clear to translucent film upon application to a substrate includes, by weight, 5-75% of (a) a water-soluble polymer having (b) in situ-formed, substantially water-insoluble resinous particles of said polymer substantially uniformly dispersed therein, and (c) 25-95% of water.

Polymeric composition

A system for delivering an active material includes (1) a stable, aqueous polymeric composition of (a) a water-soluble polymer having (b) in situ-formed, substantially water-insoluble resinous particles of said polymer substantially uniformly dispersed therein, and (c) water; and (2) an active material dispersed in said composition.

Polymeric system for delivering an active material

A rheology modifier for use in aqueous or alcoholic compositions includes an aqueous two-phase polymeric composition of by weight, 5-75% of (a) a water-soluble polymer having (b) in situ-formed, substantially water-insoluble resinous particles of said polymer substantially uniformly dispersed therein, and (c) 25-95% of water.

Rheology modifier for use in aqueous compositions

A process for making crosslinked polymers of maleic anhydride and methyl vinyl ether is described. The process is characterized by precharging methyl vinyl ether, partially or totally, in isopropyl acetate, and a crosslinker, and then continuously feeding molten maleic anhydride and methyl vinyl ether into the thus-precharged reactor. The monomer mixture then is polymerized at a temperature of about 60.degree.-80.degree. C. The reaction product is a pumpable, homogeneous suspension of the crosslinked copolymer at a solids level of about 30-50%, which is recoverable in high yield upon removal of the solvent and filtering the suspension.

Process for making crosslinked copolymers of maleic anhydride and methyl

This invention relates to an improved denture adhesive composition having extended holding power accompanied by adhesion building properties during use and having increased gel adhesion, which composition consists essentially of (a) from about 10 to about 35 wt. % lower alkyl vinyl ether-maleic acid copolymer wherein from 0 to about 90 wt. % of the copolymer carboxyl units are converted to a mixture of salts selected from the group of calcium, sodium, strontium, aluminum, zinc, magnesium and potassium; (b) 10-35 wt. % of a crosslinked terpolymer of alkyl vinyl ether, maleic anhydride and a C.sub.16 -C.sub.20 alkyl acrylate or methacrylate, or vinyl ether; crosslinked with a C.sub.6 -C.sub.14 diene, e.g. 9-decadiene, and their salts; (c) 10-35 wt. % of a cohesive agent; in a weight ratio of between about 2:1 and about 1:2 with respect to the copolymer; and (d) from about 30 to about 70 wt. % of an oil base as a carrier.

Denture adhesive

This invention relates to a 1-8% crosslinked terpolymer of a C.sub.1 -C.sub.4 alkyl vinyl ether, maleic anhydride and a hydrophobic C.sub.6 to C.sub.18 alkyl vinyl ether in a critical molar ratio of from 1-3:1:0.01-0.20, which polymer has a pH of from about 4 to about 11, a Brookfield viscosity of from about 10,000 to about 150,000 cps and is characterized as having desirable salt tolerance enhanced viscosity, stability, low residual monomers and enhanced use characteristics. The invention also relates to liquid or aqueous gel compositions of the crosslinked terpolymer containing a salt and a method for the preparation of said crosslinked terpolymer gel.

Crosslinked terpolymers of high salt tolerance

This invention relates to stable colorless concentrates and stock solutions of 1-5% crosslinked lower alkyl vinyl ether/maleic anhydride copolymers having a Brookfield viscosity of up to about 25,000 cps and to the process for their preparation.

Process for the preparation of stable water based stock solutions of

A process for hydrolyzing and neutralizing a crosslinked polymer of maleic anhydride and a C.sub.1 -C.sub.5 alkyl vinyl ether, and, optionally a hydrophobic monomer, in anhydride form substantially instantaneously in water at room temperature, which comprises reacting about 0.1-4% by weight of the crosslinked polymer in water at room temperature with ammonium hydroxide base, with stirring, to form a gel solution.

Process for hydrolyzing and neutralizing a crosslinked polymer of maleic

This invention relates to a 1-8% crosslinked terpolymer of alkyl vinyl ether, maleic anhydride and a C.sub.10 to C.sub.20 alkyl (meth)acrylate in a critical molar ratio of from 1-3:1:0.01-0.08, which polymer has a pH of from about 4 to about 11, a Brookfield viscosity of from about 10,000 to about 150,000 cps and is characterized as having significantly improved salt tolerance and stability. The invention also relates to liquid or gel compositions of the crosslinked terpolymer containing a salt and a method for the preparation of said crosslinked terpolymer gel.

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Brooklyn, NY, United States of America

Yoon T Kwak