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专利信息
专利号:US-4476252-A
优先权日:1982-11-06
标题 :Process for the synthesis of polymers with laterally linked polyoxyalkylene chains and their use for the production of polyurethanes
发明人:ESSELBORN EBERHARD; FOCK JUERGEN
权利人:GOLDSCHMIDT AG TH
摘要:Process for the synthesis of polymers with laterally linked polyoxyalkylene chains by the free radical polymerization of polyoxyalkylene ethers with olefinic double bonds with other vinyl compounds, capable of copolymerizing wherein the polyoxyalkylene ethers of allyl and/or methallyl alcohol are copolymerized in a known manner with vinyl esters of lower carboxylic acids or mixtures of vinyl esters of lower carboxylic acids with up to 50 mole percent of esters of acrylic or methacrylic acid. The compounds can be used to advantage as reaction components having hydroxyl groups in the production of polyurethanes. In particular, they improve the mechanical properties of polyurethane foams, such as, for example, their compression hardness.
专利号:US-6498229-B1
优先权日:2001-09-05
标题:Direct synthesis of segmented glycolide copolymers and crystalline materials therefrom
发明人:SHALABY SHALABY W
权利人:POLY MED INC
摘要:The present invention is directed to a method for the direct, one-step synthesis of crystalline segmented glycolide copolymers having less than 80 percent glycolide-based sequences in the copolyester chain. The copolyester chain can also be formed using a polyether glycol as the initiator for the ring-opening copolymerization of glycolide and other cyclic monomers to form highly hydrophilic materials.
专利号:WO-2006097656-A1
优先权日:2005-03-15
标 题 :Synthesis of polylactone-grafted evoh
发明人:ZERROUKHI AMAR; BECQUART FREDERIC
权利人:UNIV JEAN MONNET; CENTRE NAT RECH SCIENT; ZERROUKHI AMAR; BECQUART FREDERIC
摘要:The invention relates to a method for the synthesis of polylactone-grafted EVOH, comprising the following steps consisting in: producing a solvent-free homogeneous mixture containing at least EVOH, at least one monomer comprising a lactone ring and at least one catalyst or initiator; and stopping the polymerisation reaction after a few minutes.
专利号:US-6133473-A
优先权日:1998-06-25
标 题 :Synthesis of carbamate compounds
发明人:BERRIER JOHN VINCENT
权利人:ROHM & HAAS
摘要:Disclosed is a method for the preparation of carbamate compounds substantially free of by-products; the carbamate compounds being prepared by reacting an isocyanate with a hydroxylated compound in the presence of certain catalysts that increase the rate of carbamylation while decreasing the rate of by-product formation.
专利号:US-2025011531-A1
优先权日:2020-06-25
标 题:Synthesis of environmentally degradable alkyl polyesters
发明人:PARK KINAM; GARNER JOHN SOLOMON
权利人:AKINA INC
摘要:A solid crosslinked polyester composition that is environmentally degradable in less than about 180 days. The crosslinked polyester can be the polyesterification reaction product between one or more multi-hydroxylic alcohols, one or more hydroxy acids, and one or more multi-carboxylic acid compounds. Alternately, the crosslinked polyester can be the polyesterification reaction product of one or more multi-hydroxylic alcohols, one or more hydroxy acids, one or more multi-carboxylic acid compounds, and a cyclic ester. Provided, however that if the one or more hydroxy acids has only one carboxyl group, it has two or more hydroxyl groups, and if the one or more hydroxy acids has only one hydroxyl group, it has two or more carboxyl groups.
专利号:US-7351781-B2
优先权日:2001-04-24
标题 :Synthesis of vinyl polymers by controlled radical polymerization
发明人:WHITE DANIELA; O'DWYER JAMES B
权利人:PPG IND OHIO INC
摘要:A controlled free radical polymerization process, which includes the steps of: adding a monofunctional iniferter compound to an oxygen-free solvent; heating the solution to a temperature sufficient to allow the iniferter compound to form two carbon centered radical residues; adding a first monomer composition comprising one or more monomers to the solution containing the radical containing residues; polymerizing the first monomer composition to form a quasi-living polymer; and optionally polymerizing a second monomer composition comprising one or more monomers, which are different than the first monomer composition. The resulting non-random copolymer having the general formula:n nφ-[-A p -B s -] t -φn nwhere A and B are different compositions of ethylenically unsaturated monomers; p is an integer from 1 to 1,000; s is an integer from 0 to 1,000; t is an integer from 1 to 100; and φ is a residue from the iniferter.