The present disclosure provides multilayer particles comprising (i) a first layer comprising a first copolymer with an Mn of greater than 50,000 g/mol derived from one or more soft ethylenically-unsaturated monomers, and one or more phosphorus-containing monomer; and (ii) a second layer surrounding at least a portion of the first layer comprising a second polymer having an Mn of 500 g/mol to 50,000 g/mol, derived from one or more ethylenically-unsaturated monomer, and at least one ethylenically unsaturated acid monomer, wherein the second layer is prepared by a high temperature polymerization process. The present disclosure further provides methods of making the multilayer particles.

An aqueous polymer dispersion is composed of (i) an emulsion polymer having a weight average molecular weight of from 2,000 to 30,000 daltons, wherein the emulsion polymer comprises as polymerized units, based on the dry weight of the emulsion polymer, (a) from 10% to 90% by weight of an ethylenically unsaturated ionic monomer, (b) from 5% to 90% by weight of a photosensitive monomer, and (c) from 0 to 85% by weight of an ethylenically unsaturated nonionic monomer; and (ii) from 3.5% to 50% by weight of TEMPO and/or a derivative thereof, based on the total dry weight of the aqueous polymer dispersion. An aqueous coating composition comprising the aqueous polymer dispersion and a binder provides coatings with improved durability.

The invention relates to an aqueous polymer dispersion which comprises: a) an aqueous polymer dispersion comprising grafted rubber polymeric particles from rubber polymer being selected from natural or synthetic rubber, b) an aqueous polymer dispersion with polymeric particles of a second polymer comprising monomeric units derived from a monomeric composition b) comprising: b1) a (meth)acrylate of a linear or branched alcohol in C.sub.4 to C.sub.10 or a mixture of such (meth)acrylates, said (meth)acrylate having Tg.sub.b1 lower than −30° C., b2) optionally, at least one comonomer having Tg.sub.b2 higher than −30° C.,

with said grafted rubber polymeric particles being grafted in an aqueous dispersion by a part of said monomeric composition b) as defined above. The invention covers also a specific process of preparation of said dispersion, an adhesive composition comprising said dispersion, the use of said dispersion in pressure sensitive adhesives and the resulting adhesive.

A maleimide-based copolymer having superior dispersibility during melt extrusion and kneading. A maleimide-based copolymer having an average particle diameter of 75 μm or larger and a cumulative oversize at 1000 μm of lower than 5 mass %.

The present invention relates to a composition comprising an aqueous dispersion of polymeric composite microspheres comprising an aqueous dispersion of polymeric composite microspheres that comprise a polysiloxane and an organophosphate functionalized polymer, as defined herein, and a suspension polymerization process for making the composition. The composition is useful for making defect free coatings with a relatively low coefficient of friction.

The present invention relates to a benzophenone derivative and an aqueous copolymer dispersion comprising the benzophenone derivative. This invention also relates to an aqueous coating composition comprising the aqueous copolymer dispersion. The benzophenone derivative provides better crosslinking efficiency and improvement to dirt pick up resistance performance.

The invention describes a method for the manufacture of a plasticized polyvinyl alcohol polymer mixture including the steps of introducing a polyvinyl alcohol or a blend thereof having a degree of hydrolysis in the range of 93% to 98% or more into a mixing reactor; adding a processing agent, and a plasticizer to form a reaction mixture; wherein the plasticizer is selected from the group consisting of the following compounds and mixtures thereof: (a) sugar alcohols selected from the group consisting of: diglycerol, triglycerol, fructose, ribose, xylose, D-mannitol, triacetin, and mixtures thereof; polyols selected from the group consisting of: pentaerythritol, dipentaerythritol, and mixtures thereof; (b) diols selected from the group consisting of: methyl pentanediol, 1,2-propanediol, 1,4-butanediol, 2-hydroxy-1,3-propanediol, 3-methyl-1,3-butanediol, 3,3-dimethyl-1,2-butanediol, and mixtures thereof; (c) glycols selected from the group consisting of: polyethylene glycol 300, polyethylene glycol 400, alkoxylated polyethylene glycol, and mixtures thereof; (d) caprolactam, tricyclic trimethylolpropane formal, rosin esters, euricamide, and mixtures thereof; reacting the reaction mixture in a reaction zone to form plasticized polymer; and allowing the plasticized polymer to pass from the reaction zone.

Aqueous polyurethane dispersions and coatings and heat-activatable adhesives made from the dispersions are disclosed. The dispersions include a polyurethane reaction product of a polyester polyol and a polyisocyanate. The polyester polyol comprises recurring units of at least one C.sub.2-C.sub.6 aliphatic diol, at least one aliphatic or cycloaliphatic C.sub.4-C.sub.10 dicarboxylic acid, and an aromatic diacid source, which can be recycled PET. The dispersion is formulated using 1 to 3 moles of an acid-functional diol per mole of polyester polyol. Dispersions for the adhesives are produced at NCO/OH molar ratios within the range of 0.90 to 0.98. The adhesives successfully bond a wide range of plastic and metal materials, often demonstrating substrate failure, even with steel. This contrasts with commercial adhesives such as EVA that exhibit only adhesive failure with the same substrates.

The object of the present invention is to provide an aqueous coating composition which exhibits a small viscosity change and can form a coating film having a superior coating film appearance even when the amount of the solvent contained in the aqueous coating composition is reduced due to changes in the coating environment.

The present invention provides an aqueous coating composition comprising an acrylic resin dispersion (A) and a melamine resin (B), wherein the acrylic resin dispersion (A) has a core/shell structure, the acrylic resin dispersion (A) is a dispersion of a solution-polymerization product of a core part preparation monomer (a-1) and a shell part preparation monomer (a-2), wherein the shell part preparation monomer (a-2) comprises an acid group-containing polymerizable monomer, the mass ratio of the core part to the shell part of the acrylic resin dispersion (A) is in the range of core part/shell part=30/70 to 70/30, the shell part of the acrylic resin dispersion (A) has an acid group, and the neutralization rate of the acid groups in the shell part is 50% or more, the weight-average molecular weight of the acrylic resin dispersion (A) is in the range of 10,000 to 70,000, the core part preparation monomer (a-1) has an acid value of 10 mg KOH/g or less, and the shell part preparation monomer (a-2) has an acid value of 10 mg KOH/g or more and 70 mg KOH/g or less, the whole monomer mixture comprising the core part preparation monomer (a-1) and the shell part preparation monomer (a-2) has an acid value of 10 mg KOH/g or more and 30 mg KOH/g or less, the glass transition temperature of the acrylic resin dispersion (A) is in the range of −10 to 60° C., and the melamine resin (B) comprises a hydrophobic melamine resin.

The present invention pertains to a dispersion of polyester particles in an aqueous dispersion medium, wherein the particles have a number average particle size below 1000 nm, and wherein the polyester particles are composed of a polyester material that has a HLB (hydrophilic-lipophilic balance) value between 7.6 and 10.5.