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Inventor:
Karlik; Dennis
Address:
Bergen op zoom, NL
No. of patents:
18
Patents:












Patent Number Title Of Patent Date Issued
8064140 Transparent articles prepared from thermoplastic compositions having low birefringence November 22, 2011
An optical grade article comprises a thermoplastic composition comprising a poly(aliphatic ester)-polycarbonate copolymer comprising 10 to 25 wt % of a soft block ester unit derived from a C.sub.20-44 aliphatic dicarboxylic acid or derivative thereof, 34 to 77 wt % of a carbonate uni
7848025 Transparent articles prepared from thermoplastic compositions having high flow and ductility, an December 7, 2010
Disclosed herein is a camera lens comprising a thermoplastic composition comprising a poly(aliphatic ester)-polycarbonate copolymer comprising soft block ester units derived from an alpha, omega C.sub.6-20 aliphatic dicarboxylic acid or derivative thereof, a dihydroxyaromatic compound,
7834125 Polycarbonates, compositions made therefrom, methods of manufacture thereof, and articles theref November 16, 2010
A melt polymerized polycarbonate comprising repeat units in the polycarbonate derived from the melt polymerization of monomers (II) and/or (III), monomer (IV), and optionally monomer (VIII), wherein monomers (II) and (III) are diaryl dihydroxy compounds, monomer (IV) is a sterically
7645851 Polycarbonate with reduced color January 12, 2010
A method of making polycarbonate includes the steps of forming polycarbonate by a melt transesterification method using an activated diaryl carbonate, and compounding the polycarbonate with a phosphorus-containing compound that has an abstractable proton or hydrolyzable group. The ph
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
7259223 Process for the production of polycarbonate August 21, 2007
A process for the production of polycarbonate having increased end-cap levels, the process comprising adding a terminal blocking agent of the formula: ##STR00001## wherein R.sub.1 is a propoxy or butoxy and R.sub.2 is selected from the group consisting of C.sub.1-C.sub.30 alkyl, C
7235611 Triazine compounds, polymers comprising triazine structural units, and method June 26, 2007
In various embodiments the present invention comprises 2,4,6-trisubstituted-1,3,5-triazine capping agents comprising one, two, or three leaving groups as substituents with any remaining substituents being essentially inert to reaction with a nucleophilic group on a polymer or monomer
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
6747119 Method and system for preparing a polycarbonate, copolymerization reagent and polycarbonate June 8, 2004
A method for preparing a polycarbonate comprises preparing a free hydroxyl-containing polycarbonate and reacting the hydroxyl-containing polycarbonate with a mixture of (B) a symmetrical optionally activated aromatic carbonic acid diester and (C) an optionally substituted aromatic hi
6710156 Method for end-capping polycarbonate resins and composition for use in same March 23, 2004
A method for end-capping polycarbonate resins, comprising the step of processing a mixture comprising a polycarbonate having free hydroxyl-end groups and an end-capping reagent in a melt transesterification reaction to produce a polycarbonate resin, wherein the end-capping reagent co
6706846 Method for end-capping polycarbonate resins and composition for use in same March 16, 2004
A method for end-capping polycarbonate resins, comprising the step of processing a mixture comprising a polycarbonate having free hydroxyl-end groups and an end-capping reagent in a melt transesterification reaction to produce a polycarbonate resin, wherein the end-capping reagent co
6653434 Process for the production of polycarbonate November 25, 2003
A process for the production of polycarbonate by melt-polycondensing an aromatic dihydroxy compound and diphenylcarbonate, the process comprising adding the to polycarbonate under melt conditions a compound of the formula (1): ##STR1##wherein R.sub.1 and R.sub.3 may be the same or di
6620902 Process for preparing polycarbonate and apparatus for preparing polycarbonate September 16, 2003
A process for preparing an end-capped polycarbonate comprises melt reacting an aromatic dihydroxy compound, a carbonic acid diester, and optionally a catalyst in a prepolymerization vessel to form a polycarbonate product; transferring the polycarbonate product from the prepolymerization
6590068 Reduction of reaction by-products in polycarbonate resins July 8, 2003
Polycarbonate resin containing reduced levels of reaction by-products can be prepared by adding to the polycarbonate a scavenging agent having the formula: ##STR1##wherein R.sub.1 is alkoxy, phenoxy, benzyloxy or phenyl, and R.sub.2 is a substituted or unsubstituted C.sub.1 -C.sub.30
6525163 Process for the production of polycarbonate February 25, 2003
Polycarbonate having increased end-cap levels is made by adding an end-capping agent to the polycarbonate, preferably after the polycarbonate has reached a number-average molecular weight of about 2,000 to 15,000 Dalton. The end-capping agent has the formula: ##STR1##wherein R.sub.1
6504002 Process for the production of branched melt polycarbonate by late addition of fries-inducing cat January 7, 2003
The invention relates to a method for the production of a branched polycarbonate composition, having increased melt strength, by late addition of branch-inducing catalysts to the polycarbonate oligomer in a melt polycondensation process. Surprisingly, it has been found that by adding
6500914 Method for end-capping polycarbonate resins and composition for use in same December 31, 2002
A method for end-capping polycarbonate resins, comprising the step of processing a mixture comprising a polycarbonate having free hydroxyl-end groups and an end-capping reagent in a melt transesterification reaction to produce a polycarbonate resin, wherein the end-capping reagent co
6437083 Process for preparing branched aromatic polycarbonates August 20, 2002
A process for the production of a branched aromatic polycarbonate that includes adding a branching agent to a polycarbonate oligomer, and producing a branched aromatic polycarbonate having a melt index ratio greater than an aromatic polycarbonate produced from the polycarbonate oligo










 
 
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