Patents Assigned to Biopolymers Limited
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Patent number: 9139681Abstract: The present invention relates to methods for the production of a resin such as a thermosetting resin, particularly a bioresin, components for use in the methods, and products obtained from the methods. In one aspect the method of forming a resin comprising the steps of: (1) providing an aldehyde-cross-linking agent condensate obtained by reacting a volatile aldehyde with a cross-linking agent; (2) providing a non-volatile aldehyde; and (3) combining the aldehyde-cross-linking agent condensate and the non-volatile aldehyde, thereby forming the resin.Type: GrantFiled: December 10, 2010Date of Patent: September 22, 2015Assignee: CAMBRIDGE BIOPOLYMERS LIMITEDInventors: Colin Fitchett, Colin Chappell
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Publication number: 20130116386Abstract: The present invention relates to methods for the production of a resin such as a thermosetting resin, particularly a bioresin, components for use in the methods, and products obtained from the methods. In one aspect the method of forming a resin comprising the steps of: (1) providing an aldehyde-cross-linking agent condensate obtained by reacting a volatile aldehyde with a cross-linking agent; (2) providing a non-volatile aldehyde; and (3) combining the aldehyde-cross-linking agent condensate and the non-volatile aldehyde, thereby forming the resin.Type: ApplicationFiled: December 10, 2010Publication date: May 9, 2013Applicant: CAMBRIDGE BIOPOLYMERS LIMITEDInventors: Colin Fitchett, Colin Chappell
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Publication number: 20090247741Abstract: The present invention relates to a process for the production of cross-linked hyaluronic acid (HA) derivatives, in particular multiple, e.g. double cross-linked hyaluronic acid derivatives. The invention also provides novel cross-linked HA derivatives, products containing them and their uses in medical and pharmaceutical and cosmetic applications.Type: ApplicationFiled: March 23, 2009Publication date: October 1, 2009Applicant: MENTOR BIOPOLYMERS LIMITEDInventor: Xiaobin Zhao
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Patent number: 7226972Abstract: The present invention provides a process for the production of hyaluronic acid (HA) derivatives cross-linked with another polymer, in particular multiple e.g. double cross-linked hyaluronic acid derivatives. The invention also provides novel cross-linked derivatives, products containing them and their uses in cosmetic, medical and pharmaceutical applications.Type: GrantFiled: January 14, 2004Date of Patent: June 5, 2007Assignee: Mentor Biopolymers LimitedInventors: Xiaobin Zhao, Catherine Alexander, Jane Fraser
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Patent number: 7074872Abstract: Disclosed is a process for modifying cashew nut shell liquid (CNSL) which involves the steps of subjecting the CNSL to ozonolysis to form ozonolysis reaction products, followed by reduction of the ozonolysis reaction products to give a mixture of phenolic components and aldehydes. In a preferred embodiment, the process involves reacting CNSL with ozone to form a mixture containing ozonolysis reaction products, and then treating the mixture under reducing conditions to form a further mixture containing phenolic components with an eight carbon chain having a terminal —CHO group and alkyl components of varying lengths with either one or two terminal —CHO groups. The resulting CNSL aldehydes may be used to form adhesives for use in the manufacture of composites such as wood particle board.Type: GrantFiled: March 11, 2004Date of Patent: July 11, 2006Assignee: Cambridge Biopolymers LimitedInventors: Mohammed Lokman Khan, Jeremy Tomkinson, Richard James Salisbury
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Patent number: 7001891Abstract: The present invention provides a biodegradable polycation composition for delivery of an anionic macromolecule, comprising a polysaccharide chain having an amount of saccharide units ranging from 2 to 2000 and at least one grafted oligoamine per 5 saccharide units, wherein said oligoamine is selected from the group consisting of a linear, branched and cyclic alkyl amine having at least two amino groups.Type: GrantFiled: July 18, 2000Date of Patent: February 21, 2006Assignee: Efrat Biopolymers LimitedInventor: Abraham J. Domb
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Patent number: 6958325Abstract: The invention provides a polycation composition comprising a polysaccharide chain having an amount of saccharide units ranging from 2 to 2000, at least one oligoamine directly grafted to said polysaccharide chain per each segment of 5 saccharide units, wherein said oligoamine is selected from the group consisting of a linear, branched and cyclic alkyl amine having at least two amino groups, and at least one further grafted group selected from the group consisting of a hydrophobic and an amphiphilic group directly grafted to said polysaccharide chain per each segment of 50 saccharide units, wherein said hydrophobic or amphiphilic group includes an aliphatic chain of at least 4 carbons atoms.Type: GrantFiled: January 10, 2002Date of Patent: October 25, 2005Assignee: Efrat Biopolymers LimitedInventor: Abraham J. Domb
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Patent number: 6869989Abstract: Disclosed is a process for modifying cashew nut shell liquid (CNSL) which involves the steps of subjecting the CNSL to ozonolysis to form ozonolysis reaction products, followed by reduction of the ozonolysis reaction products to give a mixture of phenolic components and aldehydes. In a preferred embodiment, the process involves reacting CNSL with ozone to form a mixture containing ozonolysis reaction products, and then treating the mixture under reducing conditions to form a further mixture containing phenolic components with an eight carbon chain having a terminal —CHO group and alkyl components of varying lengths with either one or two terminal —CHO groups. The resulting CNSL aldehydes may be used to form adhesives for use in the manufacture of composites such as wood particle board.Type: GrantFiled: May 25, 2001Date of Patent: March 22, 2005Assignee: Cambridge Biopolymers LimitedInventors: Mohammed Lokman Khan, Jeremy Tomkinson, Richard James Salisbury
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Patent number: 6768029Abstract: The invention provides a solid composite material comprising a matrix formed from a particulate or fibrous material and a cured thermosetting resin, wherein the cured thermosetting resin is derived from an oxidative cleavage product selected from aldehydes and peroxides and mixtures thereof formed by the oxidative cleavage of an unsaturated bond in an unsaturated plant or animal oil, other than the ozonolysis cleavage product of cashew nut shell liquid. Also provided is a process for the production of aldehydes and/or peroxides, which process comprises the treatment of a vegetable oil with ozone (e.g. in the presence of an alcohol as a solvent for the oil) so that hydroperoxides are produced, and the reductive cleavages of the hydroperoxides with a reducing sugar.Type: GrantFiled: April 19, 2002Date of Patent: July 27, 2004Assignee: Cambridge Biopolymers LimitedInventors: Mohammed Lokman Khan, Jeremy Tomkinson, Colin Stanley Fitchett, Mairi Janet Black
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Patent number: 6482430Abstract: Hemicellulosic cereal extracts suitable as substrates for oxidative gelation, gels prepared therefrom, processes for their production, products containing such gels and applications thereof. Preferred sources are wheat sources, when the preparative process may involve the removal of contaminating proteins.Type: GrantFiled: March 19, 1998Date of Patent: November 19, 2002Assignee: Cambridge Biopolymers LimitedInventors: Richard Mark Weightman, Colin Stanley Fitchett, Roderick Greenshields
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Patent number: 5290894Abstract: Polymeric compounds having a polyacrolein sub unit in aldehyde, hydrated, hemi acetal or acetal form are provided which have biocidal or biostatic properties. The polymeric compound may be used to treat, or be included in, a wide range of products.Type: GrantFiled: July 31, 1989Date of Patent: March 1, 1994Assignee: Biopolymers LimitedInventors: Graham J. H. Melrose, Concetta M. Kleppe, Jeffrey W. Langley, Jeffrey M. Stewart, Jacobus Van Dyk