A crosslinked, nonionic, amphiphilic polymer is prepared by polymerizing a monomer mixture comprising an amphiphilic additive. The obtained polymer is useful for forming a clearer yield stress fluid in combination with a surfactant. The yield stress fluid is capable of suspending insoluble materials in the presence of electrolytes, perfumes, fragrances and/or organic acid preservatives.

The present invention relates to aqueous polymer-silicon oil hybrid compositions in the form of aqueous dispersions of finely divided polymer-silicon oil hybrid particles which comprise at least one water-insoluble polymer P made of ethylenically unsaturated monomers M, at least one surface-active substance and at least non-polymerizable, non-polar silicon oil. The present invention relates in particular to the use of these compositions as additives in aqueous coating and printing ink compositions.

An object is to provide fine resin particles that have solvent resistance sufficient to withstand a heating step after solvent dispersion and that generate few bubbles during dispersion and have high dispersibility in a solvent, and a method for producing the fine resin particles. As a solution, fine resin particles obtained by polymerizing a vinyl monomer, the fine resin particles having a gel fraction of 93% or more and a solvent resistance index of 50 or less, and fine resin particles obtained by polymerizing a vinyl monomer, in which the vinyl monomer contains a reactive surfactant having a polyoxyalkylene chain in a molecule thereof, and a vinyl polymer chain of the fine resin particles is terminated with a hydroxy group derived from a polymerization initiator, are provided.

An object is to provide fine resin particles that have solvent resistance sufficient to withstand a heating step after solvent dispersion and that generate few bubbles during dispersion and have high dispersibility in a solvent, and a method for producing the fine resin particles. As a solution, fine resin particles obtained by polymerizing a vinyl monomer, the fine resin particles having a gel fraction of 93% or more and a solvent resistance index of 50 or less, and fine resin particles obtained by polymerizing a vinyl monomer, in which the vinyl monomer contains a reactive surfactant having a polyoxyalkylene chain in a molecule thereof, and a vinyl polymer chain of the fine resin particles is terminated with a hydroxy group derived from a polymerization initiator, are provided.

A chloroprene copolymer latex containing a chloroprene copolymer having a structural unit derived from chloroprene and a structural unit derived from 2,3-dichloro-1,3-butadiene, in which a toluene insoluble content in the chloroprene copolymer is 50 to 95% by mass, and a modulus at 500% elongation of a film, which is obtained on a base material by dipping the base material in the chloroprene copolymer latex and then performing vulcanization at 100° C. for 30 minutes, according to JIS K 6251 is 4.0 MPa or less.

A chloroprene copolymer latex containing a chloroprene copolymer having a structural unit derived from chloroprene and a structural unit derived from 2,3-dichloro-1,3-butadiene, in which a toluene insoluble content in the chloroprene copolymer is 50 to 95% by mass, and a modulus at 500% elongation of a film, which is obtained on a base material by dipping the base material in the chloroprene copolymer latex and then performing vulcanization at 100° C. for 30 minutes, according to JIS K 6251 is 4.0 MPa or less.

Alkoxylated fatty acids are disclosed herein, as well as methods of making and using such compounds. In some embodiments, the alkoxylated fatty acids are formed from monomers derived from natural oils. In some embodiments, the alkoxylated fatty acids are used as surfactants for making synthetic latex by emulsion polymerization. In some other embodiments, the alkoxylated fatty acids are used as surfactants for making synthetic rubber, such as styrene-butadiene rubber. In some other embodiments, the alkoxylated fatty acids are used as surfactants in a composition for treatment of gas or oil wells, for cleaning applications, for use in various laundry-related applications, for use in personal care compositions, or for use as solvents for coating applications, such as reactive and non-reactive waterborne coating applications.

The present invention relates to a method for preparing an acrylonitrile-butadiene-styrene graft copolymer having improved impact strength, which comprises: a step of preparing diene-based rubber latex by adding an acrylate-based cross-linking agent (Step 1); and a step of inserting the same cross-linking agent with the acrylate-based cross-linking agent, an aromatic vinyl-based compound and a vinyl cyan-based compound to the diene-based rubber latex and then subjecting thereof to graft copolymerization (Step 2), an acrylonitrile-butadiene-styrene graft copolymer prepared by the method, and an acrylonitrile-butadiene-styrene thermoplastic resin comprising the same.

The present invention relates to a method for preparing an acrylonitrile-butadiene-styrene graft copolymer having improved impact strength, which comprises: a step of preparing diene-based rubber latex by adding an acrylate-based cross-linking agent (Step 1); and a step of inserting the same cross-linking agent with the acrylate-based cross-linking agent, an aromatic vinyl-based compound and a vinyl cyan-based compound to the diene-based rubber latex and then subjecting thereof to graft copolymerization (Step 2), an acrylonitrile-butadiene-styrene graft copolymer prepared by the method, and an acrylonitrile-butadiene-styrene thermoplastic resin comprising the same.

An aqueous copolymer dispersion is obtained by a multi-stage emulsion polymerization process comprising polymerizing in a reaction zone in a first polymerization stage a first monomer composition comprising at least 88 wt % of a vinyl ester of a C.sub.1 to C.sub.18 carboxylic acid and up to 12 wt % ethylene to produce a first stage polymer having Tg>20° C.; and polymerizing in the reaction zone, in a second polymerization stage and in the presence of the first stage polymer, a second monomer composition comprising a vinyl ester of a C.sub.1 to C.sub.18 carboxylic acid and a C.sub.2 to C.sub.8 alkyl ester of (meth)acrylic acid to produce a second stage polymer having Tg≤20° C. Each of the polymerization stages is conducted in the presence of a stabilizing system comprising at least 0.1 wt % of a protective colloid and at least 0.05 wt % of an ionic surfactant.