The present invention relates to soluble aqueous compositions comprising metal salts of selected polyitaconic acid (PIA) resins.

The present invention is a composition comprising a) a stable aqueous dispersion of polymer particles having one or more structural units of i) a polyurea macromer; and ii) an acrylate, a methacrylate, a vinyl ester, or a styrene monomer, or a combination thereof; and/or b) an aqueous mixture of a i) polyurea macromer polymer particles; and b) acrylate, methacrylate, vinyl ester, or styrenic polymer particles, or a combination thereof, wherein the polyurea macromer is characterized by the following formula I: ##STR00001##
where A.sup.1, A.sup.2, R.sup.1, R.sup.2, and R.sup.3 are as defined herein. Compositions prepared using the compound of the present invention can be used to form coatings with excellent balance of low temperature film formation, hardness, and flexibility.

The present invention relates to methods for preparing an aqueous acrylamide solution having a low acrylic acid concentration. In addition, the present invention relates to methods for reducing the acrylic acid concentration of an aqueous acrylamide solution. The methods involve a bioconversion of acrylonitrile to acrylamide in the presence of a biocatalyst, wherein during the bioconversion the content of acrylonitrile is maintained at 0.3 w/w % or more referred to the total weight of the composition in the reactor. Also provided is an aqueous acrylamide solution which is obtained by the methods of the present invention. Furthermore, the present invention is related to an acrylamide homopolymer or copolymer obtained by polymerizing the acrylamide of the aqueous solution.

The present invention provides an adhesive film hardly suffering from fisheyes and having excellent mechanical strength and heat resistance as well as good adhesion properties, which can be suitably used as various surface protective films, etc. The present invention relates to an adhesive film comprising a polyester film and an adhesive layer formed on at least one surface of the polyester film, in which the adhesive layer comprises a (meth)acrylic resin comprising a (meth)acrylate unit that comprises an alkyl group having not less than 4 carbon atoms at an ester end thereof, a content of the (meth)acrylate unit in the (meth)acrylic resin being not less than 20% by weight; and an adhesion strength to a polymethyl methacrylate plate of the adhesive layer is not less than 1 mN/cm.

The present invention provides aqueous compositions useful as zero VOC coating compositions having a % opacifying pigment volume concentration (% OPVC) of from 2 to 25 and comprising (i) an opacifier composition of an at least partially polymer encapsulated opacifying pigment, a polymer opacifying pigment composite or their mixtures, with the opacifying pigment, encapsulated in and/or as a composite with at least one soft polymer having a measured glass transition temperature (measured Tg) of 5° C. or less, and (ii) a hard binder polymer having a measured Tg of at least 30° C. and a weight average particle size of 120 nm or less, wherein the ratio of the weight average particle size of the opacifier composition to that of the hard binder polymer is from 2:1 to 12:1 and the volume ratio of the opacifying pigment to the soft polymer solids in the opacifier composition is from 2:5 to 1:1

The invention relates to an aqueous pigmented coating composition containing at least one polymer P1 in the form of an aqueous polymer dispersion, and at least one water-soluble polymer P2 that is composed of ethylenically unsaturated monomers M and contains at least 30% by weight of polymerized N-vinylpyrrolidone in relation to the total amount of monomers M. The invention further relates to the use of the aqueous pigmented coating compositions of the invention for coating tannin-containing substrates, a coating method, and the coated substrates.

The invention relates to an aqueous pigmented coating composition containing at least one polymer P1 in the form of an aqueous polymer dispersion, and at least one water-soluble polymer P2 that is composed of ethylenically unsaturated monomers M and contains at least 30% by weight of polymerized N-vinylpyrrolidone in relation to the total amount of monomers M. The invention further relates to the use of the aqueous pigmented coating compositions of the invention for coating tannin-containing substrates, a coating method, and the coated substrates.

An aqueous coating composition having an extended open time and capable of providing coating films with good properties including stain resistance and block resistance, a process of preparing the aqueous coating composition, and a method of extending open time of an aqueous coating composition.

An aqueous cross-linkable copolymer dispersion is formed by emulsion polymerization of a monomer mixture comprising at least one ethylenically unsaturated main monomer and at least one 1,3-dicarbonyl functionalized monomer and lysine or a salt thereof.

Glyoxalated polyacrylamide terpolymers and compositions formulated with them are described. These glyoxalated polyacrylamide terpolymers and compositions thereof, can have extended shelf lives and can be used as additives for papermaking, such as providing improved papermaking retention/drainage, and paper products with improved dry and/or temporary wet strength.