48 results about "Citraconic acid" patented technology

An etchant composition for silver or silver alloys which comprises at least one polycarboxylic acid, phosphoric acid, nitric acid, and water. The polycarboxylic acid preferably is at least one member selected from the group consisting of oxalic acid, malonic acid, succinic acid, glutaric acid, aconitic acid, ketoglutaric acid, maleic acid, citraconic acid, malic acid, tartaric acid, and citric acid.

The disclosed technology relates to pure polyitaconic acid homo- and co-polymers free of the less reactive tri-substituted vinyl monomers (e.g., citraconic acid or mesaconic acid) that may be used, for example, as builders in detergent applications, such as in the personal and home care market.

Biodegradable anionic polymers are disclosed which include recurring polymeric subunits preferably made up of dicarboxylic monomers such as maleic anhydride, itaconic anhydride or citraconic anhydride. Free radical polymerization is used in the synthesis of the polymers. The polymers may be complexed with ions and / or mixed with fertilizers or seeds to yield agriculturally useful compositions. The preferred products of the invention may be applied foliarly or to the earth adjacent growing plants in order to enhance nutrient uptake by the plants.

A fluorocopolymer which comprises (a) polymerized units based on tetrafluoroethylene and / or chlorotrifluoroethylene, (b) polymerized units based on a fluorinated monomer (excluding tetrafluoroethylene and chlorotrifluoroethylene) and (c) polymerized units based on at least one member selected from the group consisting of itaconic acid, itaconic anhydride, citraconic acid and citraconic anhydride, wherein (a) is from 50 to 99.8 mol%, (b) is from 0.1 to 49.99 mol%, and (c) is from 0.01 to 5 mol%, based on ((a)+(b)+(c)), and which has a volume flow rate of from 0.1 to 1000 mm<3> / sec.

A hot melt adhesive composition comprising: (a) a functional copolymer obtained from copolymerization of ethylene and a comonomer selected from maleic anhydride, citraconic anhydride, itaconic anhydride, tetrahydrophthalic anhydride, maleic acid, citraconic acid, itaconic acid, fumaric acid, tetrahydrophthalic acid, the corresponding salts, monoesters and diesters of these acids, and mixtures of any of these, wherein the functional copolymer is present in an amount from about 5 to about 95 weight % of the combined total amount of (a) and (b); and (b) at least one ethylene copolymer obtained from copolymerization of ethylene with a polar monomer wherein said polar comonomer is present in the copolymer in an amount of from 8 to 40 weight %, wherein said ethylene copolymer is selected from the group consisting of ethylene / vinyl acetate copolymers, ethylene / alkyl (meth)acrylate copolymers and ethylene / alkyl (meth)acrylate / carbon monoxide terpolymers, in an amount from about 5 to about 95 weight % of the combined total amount of (a) and (b); wherein the composition has a melt index of 100 grams / 10 minutes or higher. Articles comprising and process using the hot melt adhesive are also disclosed.

The disclosed technology relates to esterified and / or ether containing polymers derived from itaconic acid that are free of the less reactive tri-substituted vinyl monomers (e.g., citraconic acid or mesaconic acid) that may be used, for example, as builders in detergent applications, such as in the personal and home care market.

The invention provides an early strength polycarboxylic acid water reducing agent and a preparation method thereof, and a cement admixture, wherein the early strength polycarboxylic acid water reducing agent includes a copolymer formed by polymerization of a monomer A and a monomer B, and the weight percentages of the two monomers are respectively 75%-90% and 10%-25%; the monomer A has the structural formula described in the specification, wherein R1 and R2 are alkenyl containing 3-6 carbon atoms, R3O can be the same or different and is an oxyalkylene group containing 2-18 carbon atoms, R4 is -H or hydrocarbyl containing 1-30 carbon atoms, and p is an integer or fraction of 1-300; the monomer B is one or more of acrylic acid, methacrylic acid, maleic acid, maleic anhydride, fumaric acid, citraconic acid and / or salts and / or esters thereof. Through introducing the new polymerization monomers, the early strength polycarboxylic acid water reducing agent having the advantages of high water reducing rate, short setting time, good early strength effect and stable performance is obtained; when used in precast concrete, the early strength polycarboxylic acid water reducing agent can significantly improve the early strength of concrete, thereby demolding early, improving the production efficiency, and reducing the production energy consumption of the precast concrete.

A fluorocopolymer which comprises (a) polymerized units based on tetrafluoroethylene and / or chlorotrifluoroethylene, (b) polymerized units based on a fluorinated monomer (excluding tetrafluoroethylene and chlorotrifluoroethylene) and (c) polymerized units based on at least one member selected from the group consisting of itaconic acid, itaconic anhydride, citraconic acid and citraconic anhydride, wherein (a) is from 50 to 99.8 mol %, (b) is from 0.1 to 49.99 mol %, and (c) is from 0.01 to 5 mol %, based on ((a)+(b)+(c)), and which has a volume flow rate of from 0.1 to 1000 mm<3> / sec.

A rubber composition comprises at least one rubber ingredient selected from natural rubber and synthetic rubbers, and a polymaleimide synthesized by reacting at least one of anhydrous maleic acid and anhydrous citraconic acid with methylene polyaniline.

The disclosure provides a method for preparing the citraconic anhydride and a method for isomerizing / dehydrating itaconic acid. The method for preparing the citraconic anhydride includes the following steps: providing itaconic acid as a starting material; and subjecting the itaconic acid to an isomerization / dehydration reaction in the presence of a catalyst to obtain the citraconic anhydride, wherein the catalyst includes a heteropolyacid or heteropolyacid salt.

The disclosed technology relates to pure polyitaconic acid homo- and co-polymers free of the less reactive tri-substituted vinyl monomers (e.g., citraconic acid or mesaconic acid) that may be used, for example, as builders in detergent applications, such as in the personal and home care market.

The disclosed technology relates to pure polyitaconic acid homo- and co-polymers free of the less reactive tri-substituted vinyl monomers (e.g., citraconic acid or mesaconic acid) that may be used, for example, as builders in detergent applications, such as in the personal and home care market.

A copolymer that has sufficient dispersibility to various kinds of cements, including those having low fluidity (difficult cement). The copolymer is obtained by polymerizing monomer components including an unsaturated (poly)alkylene glycol ether monomer (a), an unsaturated carboxylic acid monomer (b), and an unsaturated cross-linkable monomer (c) or an unsaturated cross-linkable monomer (d). The unsaturated cross-linkable monomer (c) is allyl itaconate or allyl citraconate, or ester thereof. The unsaturated cross-linkable monomer (d) is an ester obtained by reaction of at least one acid, selected from the group consisting of (meth)acrylic acid, maleic acid, fumaric acid, itaconic acid, and citraconic acid and ester derived from the acids, with a (poly)alkylene glycol or a (poly)alkylene glycol ether.

The invention belongs to the preparation method of functionalized polyolefin resin. The polyolefin resin pre-irradiated with electron beam or γ-ray is mechanically mixed with functional monomer and electron-donating agent; the polyolefin resin is melted by reaction extrusion method. grafting reaction with functional monomers. The matrix resin is: polyethylene, polypropylene, ethylene-propylene random copolymer, ethylene-propylene block copolymer, ethylene-styrene random copolymer, polystyrene, high-impact polystyrene or acrylonitrile-butylene Diene-styrene copolymer resin; functional monomers are: acrylic acid, methacrylic acid, maleic acid, oleic acid, itaconic acid, citraconic acid, crotonic acid, glycidyl methacrylate, maleic acid Alkenic anhydride, (3-isocyanate-4-methyl) phenylcarbamate-2-propenyl ester; electron donating reagents are p-benzoquinone, triphenyl phosphate, carbon tetrachloride, caprolactam, dimethylformamide, Sulfuranilide, butanone, diphenylsulfoxide, or thionyl hydrazide.

Biodegradable anionic polymers are disclosed which include recurring polymeric subunits preferably made up of dicarboxylic monomers such as maleic anhydride, itaconic anhydride or citraconic anhydride. Free radical polymerization is used in the synthesis of the polymers. The polymers may be complexed with ions and / or mixed with fertilizers or seeds to yield agriculturally useful compositions. The preferred products of the invention may be applied foliarly or to the earth adjacent growing plants in order to enhance nutrient uptake by the plants.

A hair straightening or styling composition provided herein comprises (i) citraconic acid; (ii) (a) a reducing agent and / or (b) an aldehyde, a. thioacetal, a. ketone or an alcohol; (iii) a buffering agent; (iv) an oxidizing agent; (v) optionally a carboxylic or dicarboxylic acid; and (vi) at least one solvent. Also provided herein is a method of straightening or styling hair using such composition.