The present invention is related to a carboxylated styrene butadiene polymer latex, a method for making such and its application as binders for paper coating. In particular, the latex shows excellent wet rub performance and peel off performance. The latex may find applications as binders for paper coating.

The present invention is related to a carboxylated styrene butadiene polymer latex, a method for making such and its application as binders for paper coating. In particular, the latex shows excellent wet rub performance and peel off performance. The latex may find applications as binders for paper coating.

The invention relates to a method for producing particles of mineral material comprising grinding of at least one mineral material in the presence of water. The grinding according to the invention is carried out in the presence of at least one polymer obtained by a radical polymerization reaction of a partial sodium salt of itaconic acid and partial decarboxylation of the polymer obtained followed by partial or total neutralization of the decarboxylated polymer. The invention also relates to an aqueous composition comprising particles of ground mineral material and such a polymer, in particular a mass-loading composition for the production of paper or a paper-coating-colour composition.

The invention relates to a method for producing particles of mineral material comprising grinding of at least one mineral material in the presence of water. The grinding according to the invention is carried out in the presence of at least one polymer obtained by a radical polymerization reaction of a partial sodium salt of itaconic acid and partial decarboxylation of the polymer obtained followed by partial or total neutralization of the decarboxylated polymer. The invention also relates to an aqueous composition comprising particles of ground mineral material and such a polymer, in particular a mass-loading composition for the production of paper or a paper-coating-colour composition.

Provided is a water-soluble film for molding a packaging capsule which is capable of enclosing chemical agents especially a detergent, has a robust property that prevents leakage of the detergent through suitable thickness and strength and an easy-processing property that keeps robustness not to make a drawn portion break in mold-processing such as deep drawing, further has a soluble resistance that does not make the chemical agent elute within 30 seconds in water at 20° C. and a complete-solubility property within a short period of time in dish-washing and clothes-washing, also has sufficient solubility and complete-solubility properties for film portions around the perimeter edge pasted with a water-soluble film for a top, and exhibits a strong-sealing property to have a temporal stability.

A water-soluble film comprises one or more kinds of anion-group-modified polyvinyl alcohols including repeating units from a fatty acid vinyl ester comonomer and anion-group-containing repeating units, in which a degree of saponification thereof is set from 91 mol% or more to 99 mol% or less and a degree of modification by anion groups is set from 1.0 mol% or more to 6.0 mol% or less so that an amount of anion-group modification is set from 1.0 mol% or more to 3.5 mo%l or less to a total amount of the anion-group-modified polyvinyl alcohols, and are formed by including less than 45 parts by mass of a plasticizer per 100 parts by mass of a total amount of the anion-group-modified polyvinyl alcohols, and have a tensile modulus of 100 MPa or less.

Provided is a water-soluble film for molding a packaging capsule which is capable of enclosing chemical agents especially a detergent, has a robust property that prevents leakage of the detergent through suitable thickness and strength and an easy-processing property that keeps robustness not to make a drawn portion break in mold-processing such as deep drawing, further has a soluble resistance that does not make the chemical agent elute within 30 seconds in water at 20° C. and a complete-solubility property within a short period of time in dish-washing and clothes-washing, also has sufficient solubility and complete-solubility properties for film portions around the perimeter edge pasted with a water-soluble film for a top, and exhibits a strong-sealing property to have a temporal stability.

A water-soluble film comprises one or more kinds of anion-group-modified polyvinyl alcohols including repeating units from a fatty acid vinyl ester comonomer and anion-group-containing repeating units, in which a degree of saponification thereof is set from 91 mol% or more to 99 mol% or less and a degree of modification by anion groups is set from 1.0 mol% or more to 6.0 mol% or less so that an amount of anion-group modification is set from 1.0 mol% or more to 3.5 mo%l or less to a total amount of the anion-group-modified polyvinyl alcohols, and are formed by including less than 45 parts by mass of a plasticizer per 100 parts by mass of a total amount of the anion-group-modified polyvinyl alcohols, and have a tensile modulus of 100 MPa or less.

To provide a copolymer including: a structural unit represented by the following General Formula (1) where X represents a hydrogen atom or a cation; a structural unit expressed by the following Structural Formula (1); and a structural unit represented by the following General Formula (2) where R is a hydrogen atom or a methyl group, L is a single bond or —(CH.sub.2).sub.n—O—CO— where n is an integer in a range of from 2 through 18, and a carbonyl carbon atom in the —(CH.sub.2).sub.n—O—CO— is bound to naphthyl.

##STR00001##

To provide a copolymer including: a structural unit represented by the following General Formula (1) where X represents a hydrogen atom or a cation; a structural unit expressed by the following Structural Formula (1); and a structural unit represented by the following General Formula (2) where R is a hydrogen atom or a methyl group, L is a single bond or —(CH.sub.2).sub.n—O—CO— where n is an integer in a range of from 2 through 18, and a carbonyl carbon atom in the —(CH.sub.2).sub.n—O—CO— is bound to naphthyl.

##STR00001##

Provided is a powdery paper-strengthening agent comprising an amphoteric (meth)acrylamide-based polymer (A) having a weight-average molecular weight of 1,000,000 to 7,000,000, wherein the amphoteric (meth)acrylamide-based polymer (A) comprises, as constituent monomers, (meth)acrylamide which is an (a1) component, a cationic unsaturated monomer which is an (a2) component, an anionic unsaturated monomer which is an (a3) component, and a crosslinkable unsaturated monomer which is an (a4) component, and wherein an aqueous solution, in which the amphoteric (meth)acrylamide-based polymer (A) is dissolved in a calcium chloride aqueous solution having an electrical conductivity of 4 mS/cm at 25° C. so as to be 1% by weight, has a maximum turbidity of 10 to 2500 NTU at pH 3 to 9.

Provided is a powdery paper-strengthening agent comprising an amphoteric (meth)acrylamide-based polymer (A) having a weight-average molecular weight of 1,000,000 to 7,000,000, wherein the amphoteric (meth)acrylamide-based polymer (A) comprises, as constituent monomers, (meth)acrylamide which is an (a1) component, a cationic unsaturated monomer which is an (a2) component, an anionic unsaturated monomer which is an (a3) component, and a crosslinkable unsaturated monomer which is an (a4) component, and wherein an aqueous solution, in which the amphoteric (meth)acrylamide-based polymer (A) is dissolved in a calcium chloride aqueous solution having an electrical conductivity of 4 mS/cm at 25° C. so as to be 1% by weight, has a maximum turbidity of 10 to 2500 NTU at pH 3 to 9.