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Inventor:
Lens; Jan-Pleun
Address:
Breda, NL
No. of patents:
33
Patents:












Patent Number Title Of Patent Date Issued
7816444 Glossy colored injection molded article October 19, 2010
An injection molded article comprising a polycarbonate composition. The polycarbonate composition is scratch resistant, flame retardant, has a low chlorine and bromine content and is dark colored.
7759456 Branched polycarbonate resins and processes to prepare the same July 20, 2010
A method of increasing the branching and polydispersity of a polycarbonate includes the steps of: (a) including in the polycarbonate at least one species of an alkyl substituted monomer, and (b) treating the polycarbonate at an elevated temperature and for a sufficient time to increa
7709581 Polycarbonate-polysiloxane copolymer compositions and articles formed therefrom May 4, 2010
A thermoplastic composition comprises a copolycarbonate comprising 25 to 100 mole percent of a first carbonate unit derived from a dihydroxy aromatic compound having the formula ##STR00001## wherein R.sup.a' and R.sup.b' are C.sub.1-12 alkyl, T is a C.sub.5-16 cycloalkylene, a C.sub
7700696 Polycarbonate composition having improved scratch resistance, and articles formed therefrom April 20, 2010
A thermoplastic composition comprises A) 25 to 95 parts by weight of a first polycarbonate consisting essentially of i) 25 to 100 mole percent of a first carbonate unit comprising an alkyl-substituted bisphenol carbonate unit, ii) 0 to 75 mole percent of a second carbonate unit where
7678864 Silylated polycarbonate polymers, method of making, and articles formed therefrom March 16, 2010
A silylated polycarbonate comprises silylated carbonate units, where the silylated carbonate units can be derived from a silylated dihydroxy aromatic compound of the formula (1a): ##STR00001## wherein G.sup.a and G.sup.b are each independently C.sub.1-12 alkyl, --OSi(C.sub.1-12 alky
7666977 Poly(carbonate-co-urea) copolymers and melt transesterification method of preparing these copoly February 23, 2010
Disclosed herein is a process to prepare a poly(carbonate-co-urea) copolymer comprising reacting in the melt: (a) a dihydroxy reaction component comprising a dihydroxy compound, (b) a diaryl carbonate reaction component comprising a diaryl carbonate, (c) a urea reaction component com
7557175 Poly(carbonate-co-urea) copolymers and melt transesterification method of preparing these copoly July 7, 2009
Disclosed herein is a poly(carbonate-co-urea-co-ester) copolymer comprising incorporated urea compound, dihydroxy compound and diacid compound residues. Also disclosed herein is a poly(carbonate-co-urea) copolymer comprising incorporated urea compound and dihydroxy compound residues.
7524919 Polycarbonate-polysiloxane copolymers, method of making, and articles formed therefrom April 28, 2009
A polycarbonate copolymer comprising90 to 100 mol % of units derived from a cyclohexylidene bisphenol of the formula ##STR00001## wherein R.sup.a' and R.sup.b' are each independently C.sub.1-12 alkyl, T is a C.sub.5-16 cycloalkylene, a C.sub.5-16 cylcloalkylidene, a C.sub.1-5 alkylene,
7521505 Method of stabilization of dihydric phenols April 21, 2009
A method of producing a polycarbonate, the method comprising:polymerizing a dihydric phenol and a carbonate precursor in the presence of oxalic acid to produce a polycarbonate with a yellowness index of less than or equal to 10 measured in accordance with ASTM E313 test method on molded
7521119 Windows and other articles made from DMBPC polycarbonate homopolymer and copolymer April 21, 2009
Windows and other articles made from dimethyl bisphenol cyclohexane (DMBPC) polycarbonate exhibit enhanced scratch resistance properties and Mw degradation resistance properties as compared to traditional polycarbonates. Such windows and other articles made from DMBPC polycarbonate c
7501481 Process for production of copolycarbonates with reduced color March 10, 2009
A method is provided for reducing the color generated during production of copolycarbonate that includes quinone-type residues. The method includes the steps preparing a reaction mixture containing precursors of monomer residues, selecting a catalyst, introduction strategy and adding
7425603 Polymers, polymer compositions, and method of preparation September 16, 2008
A polymer comprising structural units derived from a polycyclic dihydroxy compound of Formula (I) ##STR00001## wherein R.sup.1, R.sup.2 and R.sup.3 are independently at each occurrence selected from the group consisting of a cyano functionality, a halogen, an aliphatic functionality
7381786 Methods of polymer preparation using polycyclic dihydroxy compounds June 3, 2008
Disclosed herein is a process for preparing a polymer comprising structural units derived from polycyclic dihydroxy compound having Formula (I), ##STR00001## wherein R.sup.1 is selected from the group consisting of a cyano functionality, a nitro functionality, an aliphatic functiona
7326763 Polymers, polymer compositions and method of preparation February 5, 2008
A polymer comprises structural units derived from a polycyclic dihydroxy compound of Formula (I) ##STR00001## wherein R.sup.1 is selected from the group consisting of a cyano functionality, a nitro functionality, an aliphatic functionality having 1 to 10 carbons, an aliphatic ester
7321069 Process for preparing bisphenols January 22, 2008
A process for preparing aromatic bisphenols, wherein the method comprises reacting an aromatic hydroxy compound with an alkylating agent having a functionality of two in the presence of a catalyst system. The catalyst system used for the process is selected from the group consisting of a
7208620 Polycyclic dihydroxy compounds and methods for preparation April 24, 2007
A dihydroxy aromatic compound having a Formula (I) wherein R.sup.1 is selected from the group consisting of a cyano functionality, a nitro functionality, an aliphatic functionality having 1 to 10 carbons, an aliphatic ester functionality having 2 to 10 carbons, a cycloaliphatic ester
7115700 Method of polycarbonate preparation October 3, 2006
Polycarbonates containing low or undetectable levels of Fries rearrangement products and comprising repeat units derived from one or more of resorcinol, hydroquinone, methylhydroquinone, bisphenol A, and 4,4'-biphenol have been prepared by the melt reaction of one or more of the afor
7105626 Method for incorporating alkyl ester endgroups to improve the release properties of melt polycar September 12, 2006
Alkyl ester end-capped polycarbonates have improved release properties and may be produced by a method comprising the step of combining a polycarbonate having free terminal OH groups with an end-capping reagent comprising a symmetrical activated carbonate and an alkyl ester, whereby
7057004 Process for the production of copolycarbonates with reduced color June 6, 2006
A method is provided for reducing the color generated during production of copolycarbonate that includes quinone-type residues. The method includes the steps preparing a reaction mixture containing precursors of monomer residues, selecting a catalyst introduction strategy and adding cata
7034099 Process for the production of copolycarbonates with reduced color April 25, 2006
A method is provided for reducing the color generated during production of copolycarbonate that includes quinone-type residues. The method includes the steps of mixing the precursors of monomer residues, a carbonate source and a polymerization catalyst into a reaction mixture. The method
7015365 Methods for preparing cycloalkylidene bisphenols March 21, 2006
A process for forming a cycloalkylidene bisphenol comprises: reacting a cycloalkanone compound of formula: ##STR00001## where [A] is a substituted or an unsubstituted aromatic group, R.sup.1 R.sup.4 independently represent a hydrogen or a C.sub.1 C.sub.12 hydrocarbyl group; and "a"
6925051 Limited play data storage media and associated methods of manufacture August 2, 2005
The present invention provides a reactive adhesive formulation for use in a limited play data storage medium, the reactive adhesive formulation including at least one adhesive material, at least one reactive material disposed within the at least one adhesive material and at least one
6870025 Method of polycarbonate preparation March 22, 2005
Polycarbonates containing low or undetectable levels of Fries rearrangement products and comprising repeat units derived from one or more of resorcinol, hydroquinone, methylhydroquinone, bisphenol A, and 4,4'-biphenol have been prepared by the melt reaction of one or more of the afor
6866909 Limited play data storage media and method for limiting access to data thereon March 15, 2005
A limited play optical storage medium for data is provided in the present invention. The limited play optical storage medium for data comprises a first substrate; a reflective layer; a data layer disposed between said substrate and said reflective layer; a reactive layer comprising at le
6790501 Limited-play optical media with improved shelf-life and playability September 14, 2004
Limited-play optical medium with improved shelf stability are formed from a plurality of layers, including in sequence: (a) a first substrate layer; (b) a data layer; (c) a reflective layer; (d) a reactive layer comprising a dye having a reduced state and an oxidized state and further co
6734277 Method of enhancing pit replication in optical disks May 11, 2004
Polycarbonate compositions incorporating long chain alkylphenol endgroups, for example cardanol, show enhanced pit replication characteristics when molded into optical disks. The enhancement in molding performance is especially pronounced at the shortest mold cycle times tested. Thus, a
6706847 Copolycarbonate compositions, and related articles and processes March 16, 2004
A thermoplastic composition is described, based on a copolycarbonate which includes at least two structural units. Structure I is usually a conventional carbonate based on bisphenol A, while structure II is a bisphenol carbonate which includes branched or linear groups extending from
6689863 Polycarbonate copolymers and methods for producing the polycarbonate copolymers February 10, 2004
A polycarbonate copolymer comprising structural units derived from a cyclohexylidene bis(alkylphenol) of the formula: ##STR1##wherein A.sup.1 is a trisubstituted aromatic radical having the formula C.sub.6 H.sub.3 R.sup.2, wherein R.sup.2 is selected from the group consisting of C.su
6689862 Polyestercarbonates and methods of manufacture February 10, 2004
Polyestercarbonates are disclosed which comprise structural units derived from at least one bisphenol derived from terpene precursors, at least one aromatic dihydroxy compound comonomer, at least one diester derived from a C.sub.1 -C.sub.40 linear or branched divalent hydrocarbyl radical
6657038 Method for making copolycarbonates December 2, 2003
A melt polymerization method is presented which permits the efficient preparation of copolycarbonates in which one or more of the constituent dihydroxy. aromatic compounds employed is relatively volatile, having a boiling point of less than about 340.degree. C. Relatively volatile di
6552158 Dimensionally stable polycarbonate articles April 22, 2003
The disclosure relates to articles using polycarbonates produced by a melt transesterification polymerization method using bis(hydroxyaryl)cyclohexanes. Such polycarbonates have suitable glass transition temperatures and outstanding dimensional stabilities, thus making them particula
6486294 Production of poly(carbonate-co-ester) copolymers November 26, 2002
A poly(carbonate-co-ester) block copolymer is synthesized using synthetic strategies that can be incorporated into conventional melt facilities that are commonly used in the production of polycarbonate polymers. The polycarbonate block of the poly(carbonate-co-ester) copolymer is derived
6482977 Melt process for the synthesis of diaryl esters of aliphatic diacids November 19, 2002
This invention relates to a method for preparing diaryl esters, comprising the step of reacting a mixture comprising diaryl carbonate and a dicarboxylic acid, wherein 2.005 to 2.2 molar equivalents of diaryl carbonate per molar equivalent of dicarboxylic acid are provided.










 
 
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