Resin hydroxyethylmethacrylate

A photocurable resin (hydroxyethylmethacrylate or HEMA) was injected (by N2 gas) into two aligned PMMA channel plates for bonding and surface modification. This method can bond PMMA plates well and produce a hydrophilic... 

Another development has been the advent of the dual-cure resin cements. These are hybrids of glass polyalkenoate cements and methacrylates that set both by an add-base cementation reaction and by vinyl polymerization (which may be initiated by light-curing). In these materials, the solvent is not water but a mixture of water and hydroxyethylmethacrylate which is capable of taking dimethacrylates and poly(acrylic add)-containing vinyl groups into solution. In the absence of light these materials set slowly and... 

Anion-exchange resins especially useful for sorption and chromatographic separation of biopolymers have been prepared by treating ethylenedimethacrylate-2-hydroxyethylmethacrylate or 2-hydroxyethylacrylate-methylenebisacrylamide copolymer with l-chloro-2-diethylaminoethane hydrochloride or with epichlorohydrin and triethanolamine or with triethylglycidylammonium chloride. 

Quantitative photophysical, photochemical and photopolymerisation data are presented on five novel water soluble benzophenone photoinitiators. Phosphorescence quantum yields, triplet lifetimes and transient formation on conventional flash photolysis correlate with the ability of the initiators to photoinduce the polymerisation of 2-hydroxyethylmethacrylate and a commercial monoacrylate resin in aqueous media. The results indicate that the lowest excited triplet state of the initiator is abstracting an electron from the tertiary amine cosynergist probably via a triplet exciplex followed by hydrogen atom abstraction. This is confirmed by a detailed analysis on the effect of oxygen, pH and the ionisation potential of the amine on transient formation and photopolymerisation. Using photocalorimetry a linear correlation is found between the photopolymerisation quantum yields of the initiators and their photoreduction quantum yields in aqueous media. 

The water used in this study was double distilled and the amines (N-methyldiethanolamine, tri-n-butylamine, triethylamine, diethylamine, N-diethylmethylamine, dicyclohexylamine and N,N -dimethylaniline) were obtained from the Aldrich Chemical Company Limited, UK as was the monomer 2-hydroxyethylmethacrylate. The monoacrylate water-soluble resin RCP-1784 was supplied by Lankro Chemicals Limited, Eccles, manchester, UK and used as received. 

D-Glucose isomerase has been immobilized with retention of enzymic activity by water soluble carbodi-imide aided reaction with chitosan. By reaction with/adsorption on to a range of new polyphenolic resins, and as Strepto-myces phaeochromogenes cells in fine-particle form using radiation-induced polymerization at low temperatures with previously salted out hydrophilic monomers such as 2-hydroxyethylacrylate and 2-hydroxyethylmethacrylate. ... 

Numerous methods of modifying epoxidized polydienes aim at introducing into the structure of these resins some unsaturated groups with increased reactivity. One of these is the reaction of oxiranic groups with unsaturated carboxylic acids (acrylic, methacrylic, itaconic) [222] and, more frequently, with acrylic hydroxy esters, like 2-hydroxyethylmethacrylate, 2-hydroxyethylaciylate, and especially reaction products of the semiester type obtained by the reaction between hydroxyalkylmethacrylates and polycarboxylic acid anhydrides [223,224]. 

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