Patents Assigned to Baxenden Chemicals Limited
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Patent number: 7981821Abstract: A poly(urethane-urea) comprising segments derived from (a) a diisocyanate or mixture of diisocyanates; (b) a polyether polyol comprising repeating units of general formula —[(CH2)mO]— wherein each m is the same or different and is 3 or 4, or a mixture of said polyether polyols; and (c) a diamine or mixture of diamines, wherein said polyether polyol segment(s) (b) make up at least 70% by weight of the dry poly(urethane-urea) and wherein the ether oxygen atoms of said polyether polyol segment(s) (b) make up at least 15% by weight of the dry poly(urethane-urea); and wherein said poly(urethane-urea) has an amine end group content of up to 0.2% by weight. These poly(urethane-urea)s can be manufactured and compounded to give one-component and two-component coating formulations, which can be used to produce materials with good barrier properties such as waterproof breathable fabrics, foul weather and protective clothing, and films for medical and other applications.Type: GrantFiled: January 11, 2006Date of Patent: July 19, 2011Assignee: Baxenden Chemicals LimitedInventors: George Robert Lomax, Noel Thomas Eggington, Rosemary Danes
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Publication number: 20080102314Abstract: A poly(urethane-urea) comprising segments derived from (a) a diisocyanate or mixture of diisocyanates; (b) a polyether polyol comprising repeating units of general formula —[(CH2)mO]— wherein each m is the same or different and is 3 or 4, or a mixture of said polyether polyols; and (c) a diamine or mixture of diamines, wherein said polyether polyol segment(s) (b) make up at least 70% by weight of the dry poly(urethane-urea) and wherein the ether oxygen atoms of said polyether polyol segment(s) (b) make up at least 15% by weight of the dry poly(urethane-urea); and wherein said poly(urethane-urea) has an amine end group content of up to 0.2% by weight. These poly(urethane-urea)s can be manufactured and compounded to give one-component and two-component coating formulations, which can be used to produce materials with good barrier properties such as waterproof breathable fabrics, foul weather and protective clothing, and films for medical and other applications.Type: ApplicationFiled: January 11, 2006Publication date: May 1, 2008Applicant: BAXENDEN CHEMICALS LIMITEDInventors: George Robert Lomax, Noel Thomas Eggington, Rosemary Danes
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Patent number: 6180744Abstract: A composition containing at least one isocyanate terminated polyester obtainable by enzyme catalyzed polyesterification of one or more monomers selected from dicarboxylic acids, diols or polyols and/or hydroxyacids in the presence or absence of an inert organic solvent and a diisocyanate.Type: GrantFiled: November 13, 1998Date of Patent: January 30, 2001Assignee: Baxenden Chemicals LimitedInventors: Alan Taylor, Julie Anne Thompson
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Patent number: 6063860Abstract: A water dispersible blocked polyisocyanate of formula (I) R--Y.sub.m, where R is an m valent group comprising an aliphatic, cycloaliphatic, heterocyclic or aromatic group and comprising at least three consecutive ethylene oxide groups or at least one residue of a polyhydroxy carboxylic acid, and each group Y, which may be the same or different, is a group of formula (II), ##STR1## where each R.sup.1 is the same or different when n is more than 1 and each R.sup.1 is an alkyl, alkenyl, aralkyl, N-substituted carbamyl, phenyl, NO.sub.2, halogen or a group --C(O)--O--R.sup.2 where R.sup.2 is hydrogen or an alkyl group; n is 0, 1, 2 or 3; and m is an integer of 2 or more.Type: GrantFiled: April 29, 1998Date of Patent: May 16, 2000Assignee: Baxenden Chemicals LimitedInventors: Ian Kevin Rimmer, Richard Alan Spencer
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Patent number: 5631343Abstract: A process for producing a polyester comprising as repeating units(i) residues of at least one aliphatic hydroxycarboxylic acid, aminocarboxylic acid, or derivative thereof; or(ii) residues of (a) at least one aliphatic dicarboxylic acid or derivative thereof, (b) at least one aliphatic hydroxyamine, diol, polyol, diamine or polyamine, and optionally (c) at least one aliphatic hydroxycarboxylic acid, aminocarboxylic acid or derivative thereof;comprises reacting the components defined in (i) or components defined in (ii) in the absence of a solvent and in the presence of a lipase.Type: GrantFiled: June 15, 1995Date of Patent: May 20, 1997Assignee: Baxenden Chemicals LimitedInventors: Falmai Binns, Alan Taylor