Rohm and Haas Company

Momentive Performance Materials Gmbh

Yogesh Tiwary

James Charles Bohling

Arnold Stan Brownell

Pu Luo

David Goodro Kelly

Wei Gao

Ericka Lynn Killian

Michael Rhodes

Vikram Kumar

Ping Jiang

Martin Wusik

Michael James Seeber

Louisa Maio

David G Kelly

A crosslinkable silicone based emulsion composition includes a hydroxylated polydiorganopolysiloxane grafted onto at least one colloidal silica dispersion, wherein the at least one hydroxylated polydiorganopolysiloxane grafted onto the least one colloidal silica dispersion contains residual silanol groups from the at least one hydroxylated polydiorganopolysiloxane. Further, a waterborne co-binder silicone-organic resin composition includes (A) the crosslinkable silicone emulsion and (B) an organic resin emulsion which provides improved cured properties including, but not limited to, improved hydrophobicity (water resistance), scratch resistance and gloss retention as well as process for making the emulsions and the compositions.

Silicone based emulsion, method for making same, and waterborne co-binder resin compositions comprising such emulsions

The present invention relates to a composition comprising a bimorphological aqueous dispersion of first and second polymer particles, wherein the first polymer particles comprise a shell and a phosphorus acid functionalized protuberating core, and the second polymer particles do not comprise a protuberating core. The composition is useful for pigmented coatings formulations.

Bimorphological latex

The present invention is a composition comprising a stable aqueous dispersion of polymer particles having a core comprising structural units of: a) a phosphorus acid monomer, b) an acid monomer, c) a multiethylenically unsaturated monomer; and d) a polymerizable ethylenically unsaturated bulk monomer; and a shell comprising structural units of a1) a sulfur acid monomer, and b1) a polymerizable ethylenically unsaturated bulk monomer; wherein the core protuberates from the shell and the ratio of the structural units of the sulfur acid monomer to structural units of carboxylic acid monomer in shell is at least 0.2:1. Control of the proportion of sulfur acid monomer units to carboxylic acid monomer units results in an improvement in the viscosity stability of paint formulations containing latexes possessing acorn morphology without sacrificing hiding.

Dispersion of adsorbing emulsion polymer particles

The present invention relates to an in situ method for preparing a bimorphological aqueous dispersion of first polymer particles with protuberating phosphorus acid cores and second polymer particles without protuberating cores. The method provides a more efficient way of making compositions for pigmented coating formulations.

In situ preparation of a bimorphological latex

The present invention is a composition comprising a) an aqueous dispersion of TiOparticles encapsulated with an encapsulating acrylic or styrene-acrylic polymer comprising from structural units of diacetone acrylamide; and b) adipic acid dihydrazide. The composition is useful in coatings applications and shows a surprising improvement in gloss over compositions that do not include diacetone acrylamide functionalized encapsulating polymer and adipic acid dihydrazide.

Polymer encapsulated TiO2 coating formulation

The present invention relates to a process for preparing an aqueous dispersion of polymer encapsulated TiOparticles, comprising a multistage polymerization steps that includes a relatively large amount of low Tfirst monomers and a relatively small amount of high Tsecond monomers that comprise a relatively high concentration of an acid monomer. The dispersion of encapsulated TiOparticles shows significantly improved freeze-thaw stability as compared with prior art processes that do not include staging with the second monomers described herein.

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The present invention relates to a stable aqueous dispersion of polymer particles with structural units of a) a phosphorus acid monomer or a salt thereof; b) a carboxylic acid monomer or a sulfur acid monomer or a salt thereof or a combination thereof; c) a multiethylenically unsaturated monomer; and d) an acrylate monomer, wherein the polymer particles have a solids content in the range of 30 to 50 percent and a particle size of from 40 nm and 100 nm.

The present invention relates to a composition comprising stable aqueous dispersion of polymer particles with acorn morphology, a hydrophobically modified ethylene oxide urethane based rheology modifier (HEUR) and a substantial absence of pigment particles with a refractive index in the range of from 2.0 and 3.0. The composition imparts improved HEUR efficiency for coating compositions such as deep base coating compositions.

Composition comprising a latex and a HEUR thickener

The present invention relates to a pre-paint composite comprising an aqueous slurry of TiOparticles and a polymeric binder, wherein from 35 to 90 weight percent of the polymeric binder is attached to the TiOparticles, based on the weight of polymeric binder in the pre-paint composite. The pre-composite of the present invention is useful in paint compositions, particularly those that require freeze-thaw stability.

Freeze-thaw stable paint formulation

The present invention relates to a process comprising contacting a stable aqueous dispersion of pre-formed polymer particles with a monomer emulsion under emulsion polymerization conditions to form a stable aqueous dispersion of pre-formed particles protuberating from polymer particles arising from the polymerization of the monomer emulsion; these multistage polymer particles show exceptional compatibility with pigment particles. In another aspect, the present invention is a composition relating to the pre-formed particles.

The present invention relates to a pre-paint composite comprising an aqueous slurry of TiOparticles and attached and unattached polymeric binder, and a sufficient amount of a secondary alcohol ethoxylate of the formula CHO(CHCHO)H to give 35 to 90 weight percent attachment of polymeric binder to the TiOparticles, based on the weight of total polymeric binder in the pre-paint composite, where x is from 15 to 50; and the O(CHCHO)H group is bonded to a CH group on the CHchain. The present invention also relates to a coatings composition containing the composite as well as a process for preparing the pre-paint composite and the coatings composition.

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Bengaluru, India

Yogesh Tiwary