合成了一系列在N-乙烯基-2-吡咯烷酮(NVP)3位具有不同取代基的新单体。取代基包括简单的烷基(甲基,乙基,丙基和异丙基),醚(甲氧基乙基和乙氧基乙基)和官能团(例如醛,环氧基和乙炔)。这些单体进行自由基共聚,以生成基于聚N的一系列共聚聚合物。-乙烯基-2-吡咯烷酮)(PVP),并且可以通过改变共聚单体进料比来控制共聚物组成。当单体被含乙基,甲基或醚的烷基链取代时,它们的均聚物可溶于冷水,但加热至浊点温度(CP)时显示出敏感且可逆的相变。通过改变取代基的亲水性来控制均聚物的CP。CP也可以通过不同单体的共聚或向聚合物水溶液中添加NaCl来调节。通过温度依赖性1研究了热响应特性的机理。1 H NMR和微量量热法。结果证实,即使在远高于CP的温度下,带有醚取代基的(共)聚合物的相变与较低的相变焓和较少的脱水也没有协同作用,并且过渡主要是液态到液态。另外,将醛,环氧基和乙炔基团作为反应性基团引
Disclosed are spirocyclic olefin polymers, methods of preparing spirocyclic olefin polymers, photoresist compositions including spirocyclic olefin resin binders and methods of forming relief images using such photoresist compositions.
PROCESS FOR REMOVING BY-PRODUCTS FROM N-VINYLAMIDES
申请人:Staffel Wolfgang
公开号:US20110245510A1
公开(公告)日:2011-10-06
A process for removing by-products from N-vinylamide-rich product mixtures (crude N-vinylamide), which comprises performing an extraction of the crude N-vinylamide with an organic solvent as the extractant.
[EN] CROSS-LINKING AGENT(S)<br/>[FR] AGENT(S) DE RÉTICULATION
申请人:GL CHEMTEC VISION INC
公开号:WO2018027311A1
公开(公告)日:2018-02-15
Cross-linking agent(s), composition(s) made therefrom and use(s) thereof. For example, crosslinking agent(s) that are used to make composition(s) such as hydrogel material(s). Such materials are useful in the manufacture of biocompatible medical devices, for example, hydrogel materials having desirable physical properties for use as contact lense(s) and/or stimulating device(s).
Branched polymers are prepared from at least (A) at least one monomer having an electron donor moiety, (B) at least one monomer having an electron acceptor moiety, and (C) at least one multifunctional branching agent comprising a urea moiety and at least two N-vinyl groups. The branched polymers are least 20% (by weight) soluble in a solvent for which the corresponding polymer of equal molecular weight made without said multifunctional branching agent is at least 20% (by weight) soluble. Due in part to the wide range of chemistries and solubility and rheological properties, the branched polymers find application in personal care, pharmaceutical/nutritional, and performance chemicals compositions.
CARBOXYETHYL ACRYLATE CONTAINING COPOLYMER STABILIZER/THICKENERS AND METHODS TO MITIGATE THE LOSS OF SILICONE DEPOSITION ON KERATINOUS SUBSTRATES
申请人:LUBRIZOL ADVANCED MATERIALS, INC.
公开号:US20150342858A1
公开(公告)日:2015-12-03
A conditioning cleansing composition comprising at least one detersive surfactant, a silicone conditioning agent and a crosslinked acrylic copolymer stabilizer/thickener that mitigates the loss silicone deposition on keratinous substrates is disclosed. The crosslinked acrylic copolymer is prepared by polymerizing a monomer composition comprising: a) from about 5 to about 50 wt. % of carboxyethyl acrylate and/or oligomers thereof; b) from about 30 to about 95 wt. % of a monomer selected from ethyl acrylate, vinyl acetate, or mixtures thereof; c) from about 0 to about 50 wt. % of (meth)acrylic acid; and d) from about 0.001 to about 5 wt. % of a polyunsaturated crosslinking monomer containing at least two polymerizable ethylenically unsaturated moieties.