摘要:
Personal care compositions comprising a polymer-bound UV absorber are described that provide enhanced properties, including customizable UV spectrum protection, broad-spectrum UV spectrum protection, water resistance, and labile UV stabilization. The polymer comprises anhydride functionality, such as maleic anhydride or a derivative thereof, and the UV absorber contains at least one hydroxyl, primary amine, or secondary amine group.The personal care compositions may be used to treat and/or protect against burns, cancers, erythema, lentigo (“liver spots”), keratotic lesions, wrinkles, and cellular changes of the skin; and/or color changes, embrittlement, lack of luster, tangles, split ends, and/or unmanageability of the hair.
摘要:
A composition is provided herein for preventing or retarding the formation of gas hydrates or for reducing the tendency of gas hydrates to agglomerate, during the transport of a fluid comprising water and a hydrocarbon, through a conduit. The composition is a homopolymer of an N-alkyl(meth)acrylamide, N,N-dialkyl(meth)acrylamide or copolymers thereof with N-vinyl-N-methylacetamide, in a defined solvent, which homopolymers and copolymers are made and applied in the defined solvent, which, most preferably, is a low molecular weight glycol ether such as 2-butoxyethanol.
摘要:
A non-aqueous, heterogeneous polymerization process comprises heating a reaction mixture of about 5-70%, preferably 10-30%, by weight, of a vinyl monomer in an oil as solvent, and a free radical initiator, optionally in the presence of a crosslinking agent and/or a surfactant, wherein the oil solvent is present in an amount sufficient to keep the resultant polymer in a stirrable state throughout the polymerization. The polymer reaction product is capable of forming a uniform emulsion or gel upon addition of water thereto.
摘要:
A fabric softening composition capable of reducing the transfer of dyes during subsequent wash cycles comprising:I. an effective amount of fabric softening agent; andII. an effective amount of water-soluble polymeric dye transfer inhibitor which is a poly(vinylpyridine betainecontaining a quaternary nitrogen and a carboxylate salt having dye transfer inhibitor properties having the formula: ##STR1## where m defines a repeating unit; X is an anion;R and R.sub.2 are independently hydrogen, alkyl or aryl;n is 1-5; andM is a cation; and copolymers thereof.
摘要:
A terpolymer for ink jet recording comprises by weight, 1-99% of a vinyl lactam, preferably vinyl pyrrolidone, 1-99% of a polymerizable carboxylic acid, preferably acrylic acid and 1-99% of 2-carboxyethyl (meth)acrylate, preferably crosslinked with a polyfunctional aziridine, This terpolymer forms water-insoluble coatings on a support such as paper or polyester which are particularly receptive to water-based ink jet printing inks.
摘要:
A process for making a solution of PVP K-90 polymer having a weight average molecular weight, Mw, of about 630,000 to 750,000 and a molecular weight distribution, Mw/Mn, where Mn is the number average molecular weight of the polymer, of 5 or less, which comprises free radical polymerizing about 5-30% by weight vinylpyrrolidone, preferably 10-20%, at about 40.degree.-100.degree. C., preferably 60.degree.-75.degree. C., in an aqueous-alcohol solvent selected from the group consisting of about (a) 5% isopropanol-95% water, (b) 10% ethanol-90% water and (c) 20% methanol-80% water.
摘要:
What is provided herein is a process for making homopolymers of polyvinylpyrrolidone polymer in the form of fine powders at a polymer solids level of at least about 17%, preferably 30% or more, and in a yield of at least about 95%, which comprises precharging a reactor with a predetermined amount of a solvent selected from a C.sub.3 -C.sub.20 alkane, preferably heptane, or a C.sub.3 -C.sub.20 cycloalkane, preferably cyclohexane, and a free radical polymerization initiator, and feeding vinylpyrrolidone monomer into the precharged reactor at a selected rate, preferably about 0.1 to 1.8 g vinylpyrrolidone/min/1000 g of solvent, and most preferably, about 1 g/min/1000 g of cyclohexane and 0.5 g/min/1000 g of heptane, which rates preclude build-up of monomer during the polymerization, and for a feed period which provides the desired level of polymer solids in the reaction product, preferably at least about 200 minutes. The polymer product may be isolated from the reaction mixture by filtration and drying, or by direct drying.
摘要翻译:本文提供的是以至少约17%,优选30%或更高,至少约95%的聚合物固体含量制备细粉末形式的聚乙烯吡咯烷酮聚合物的均聚物的方法,其包含 用预定量的选自C 3 -C 20烷烃,优选庚烷或C 3 -C 20环烷烃,优选环己烷的溶剂和自由基聚合引发剂预反应器,并以选定的速率将乙烯基吡咯烷酮单体进料到预充电反应器中 ,优选约0.1至1.8g乙烯基吡咯烷酮/ min / 1000g溶剂,最优选约1g / min / 1000g环己烷和0.5g / min / 1000g庚烷,其速率阻止单体累积 聚合反应,以及在反应产物中提供所需水平的聚合物固体的进料周期,优选至少约200分钟。 聚合物产物可以通过过滤和干燥或通过直接干燥从反应混合物中分离出来。
摘要:
What is provided herein are copolymers of a vinyl lactam and a hydroxy or amino alkene monomers, which contain a hydroxy or amino functionality therein. These copolymers are prepared by reaction between a vinyl lactam, e.g. vinylpyrrolidone (VP) or vinyl caprolactam (VCL), a functional polymerizable monomer, e.g. .omega.-amino-1-alkene (AA) or .omega.-hydroxy-1-alkene (HA), in water solution in the presence of a free radical initiator under predetermined reaction conditions.
摘要:
What is described herein is an improved precipitation polymerization process and copolymer products produced thereby. The process herein is carried out by charging a reactor with a solvent in which the copolymer product is substantially insoluble over the entire compositional range of the copolymer, preferably heptane or cyclohexane, and a polymerization initiator, heating to 50.degree. to 150.degree. C., agitating, and then simultaneously feeding selected amounts of a vinyl lactam and a polymerizable carboxylic acid into said reactor below the surface of the solvent while continuing to agitate the mixture to precipitate the copolymer from solution as a fine, white powder, and recovering the copolymer of defined composition.
摘要:
The invention relates to 5-oxo-3-pyrrolidinecarboxylic acid derivatives having the structural formula ##STR1## wherein X is selected from the group of ##STR2## R.sub.2 and R.sub.3 are each H or CH.sub.3, and R.sub.1 is H or a hydrocarbon radical having from 1 to 20 carbon atoms, which derivative compounds are suitable as monomers which can be homopolymerized or copolymerized to yield high molecular weight materials having many useful properties and applications, among which is their ability to form complexes with water insoluble molecules which are normally not complexible with similar type polymers.