Patents by Inventor Godefridus Bernardus Wilhelmus Leonardus Ligthart
Godefridus Bernardus Wilhelmus Leonardus Ligthart has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11448365Abstract: This invention relates to a pressure vessel comprising a hollow body comprising endless fibers embedded in a thermoplastic polymer, in which the thermoplastic polymer comprises one or more polyamides containing one or more aliphatic monomeric units, wherein the one or more polyamides have a CH2-ratio of at least 5.5 and less than 10, calculated by ? identifying the number of different aliphatic monomeric units in the one or more polyamides; ? determining the number of CH2 groups per aliphatic monomeric unit for each of these different aliphatic monomeric units; ? calculating the sum of the so determined numbers of CH2 groups; ? dividing said sum by the number of different aliphatic monomeric units in the one or more polyamides; taking into account only the aliphatic monomeric units present in the one or more polyamides in an amount of at least 10 wt % with respect to the total weight of the one or more polyamides.Type: GrantFiled: December 2, 2016Date of Patent: September 20, 2022Assignee: DSM IP ASSETS B.V.Inventors: Beert Jacobus Keestra, Tim Leonardus Maria Vorage, Godefridus Bernardus Wilhelmus Leonardus Ligthart
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Patent number: 11046023Abstract: The invention relates to a tape, comprising at least one layer comprising a. endless fiber in an total amount of at least 40 volume % as compared to the total volume of the layer and b. a thermoplastic matrix comprising one or more polyamides containing one or more aliphatic monomeric units, c. and optionally heat stabilizer, flame retardant, colorant, lubricant, mold release agent, UV stabilizer, impact modifier, laser absorbing additive as well as combinations thereof; wherein the one or more polyamides have a CH2-ratio of at least 5.Type: GrantFiled: December 2, 2016Date of Patent: June 29, 2021Assignee: DSM IP ASSETS B.V.Inventors: Beert Jacobus Keestra, Tim Leonardus Maria Vorage, Godefridus Bernardus Wilhelmus Leonardus Ligthart
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Publication number: 20180370157Abstract: The invention relates to a tape, comprising at least one layer comprising a. endless fiber in an total amount of at least 40 volume % as compared to the total volume of the layer and b. a thermoplastic matrix comprising one or more polyamides containing one or more aliphatic monomeric units, c. and optionally heat stabilizer, flame retardant, colorant, lubricant, mold release agent, UV stabilizer, impact modifier, laser absorbing additive as well as combinations thereof; wherein the one or more polyamides have a CH2-ratio of at least 5.Type: ApplicationFiled: December 2, 2016Publication date: December 27, 2018Inventors: Beert Jacobus KEESTRA, Tim Leonardus Maria VORAGE, Godefridus Bernardus Wilhelmus Leonardus LIGTHART
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Publication number: 20180363849Abstract: This invention relates to a pressure vessel comprising a hollow body comprising endless fibers embedded in a thermoplastic polymer, in which the thermoplastic polymer comprises one or more polyamides containing one or more aliphatic monomeric units, wherein the one or more polyamides have a CH2-ratio of at least 5.5 and less than 10, calculated by ? identifying the number of different aliphatic monomeric units in the one or more polyamides; ? determining the number of CH2 groups per aliphatic monomeric unit for each of these different aliphatic monomeric units; ? calculating the sum of the so determined numbers of CH2 groups; ? dividing said sum by the number of different aliphatic monomeric units in the one or more polyamides; taking into account only the aliphatic monomeric units present in the one or more polyamides in an amount of at least 10 wt % with respect to the total weight of the one or more polyamides.Type: ApplicationFiled: December 2, 2016Publication date: December 20, 2018Inventors: Beert Jacobus KEESTRA, Tim Leonardus Maria VORAGE, Godefridus Bernardus Wilhelmus Leonardus LIGTHART
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Patent number: 9376535Abstract: The invention relates to a high molecular weight branched polyamide polymer comprising (a) blocks predominantly consisting of AA-BB repeat units, (b) blocks predominantly consisting of AB repeat units, and (c) branching units. The invention also relates to a process for the preparation of the high molecular weight branched polyamide polymer, comprising (1) a melt-mixing step wherein an essentially linear polyamide prepolymer (X-1), predominantly consisting of AA-BB repeat units, an essentially linear polyamide (pre)polymer (X-2), predominantly consisting of AB repeat units, and a branching agent are provided to and mixed and heated in a melt mixing apparatus, thereby forming a mixed melt, and the mixed melt being cooled, thereby forming a solid mixture; and (2) a solid state post condensation step wherein the solid mixture is post-condensed at elevated temperature in the solid state, thereby forming a high molecular weight branched polyamide polymer.Type: GrantFiled: June 25, 2012Date of Patent: June 28, 2016Assignee: DSM IP ASSETS B.V.Inventors: Nileshkumar Prakash Kukalyekar, Zhujuan Wang, Rudy Rulkens, Godefridus Bernardus Wilhelmus Leonardus Ligthart
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Patent number: 9321888Abstract: The invention relates to a branched polyamide prepolymer obtained or obtainable by polymerization of a polyamide forming monomer mixture, comprising AA-BB repeat units and branching units derived from diamines (monomer A) dicarboxylic acids (monomer B), and/or a salt of A and B, and a higher functional monomer (monomer C) present in a molar amounts defined by formula I and formula II: MC=(Q/FC)*(MA+MB) (Formula I) and R=((MA*2)+(MC*FCA))/((MB*2)+(MC*FCB)) (Formula II) wherein—MA, MB and MC represent the molar amounts of repeat units derived from the monomers A, B and C, respectively; —FC represent the functionality of monomer C, and is equal to FC-A+FC-B; —FC-A is the number of the amino functional groups comprised by monomer C; —FC-B is the number of carboxyl functional groups or precursor groups thereof comprised by monomer C; —Q is a number in the range of 0.06-1.00; and —R is a number in the range of 0.7-1.Type: GrantFiled: June 26, 2012Date of Patent: April 26, 2016Assignee: DSM IP ASSETS B.V.Inventors: Nileshkumar Prakash Kukalyekar, Zhujuan Wang, Rudy Rulkens, Godefridus Bernardus Wilhelmus Leonardus Ligthart
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Publication number: 20150148518Abstract: The invention relates to a branched polyamide prepolymer obtained or obtainable by polymerization of a polyamide forming monomer mixture, comprising AA-BB repeat units and branching units derived from diamines (monomer A) dicarboxylic acids (monomer B), and/or a salt of A and B, and a higher functional monomer (monomer C) present in a molar amounts defined by formula I and formula II: MC=(Q/FC)*(MA+MB) (Formula I) and R=((MA*2)+(MC*FCA))/((MB*2)+(MC*FCB)) (Formula II) wherein—MA, MB and MC represent the molar amounts of repeat units derived from the monomers A, B and C, respectively;—FC represent the functionality of monomer C, and is equal to FC-A+FC-B;—FC-A is the number of the amino functional groups comprised by monomer C;—FC-B is the number of carboxyl functional groups or precursor groups thereof comprised by monomer C;—Q is a number in the range of 0.06-1.00; and—R is a number in the range of 0.7-1.Type: ApplicationFiled: June 26, 2012Publication date: May 28, 2015Applicant: DSM IP ASSETS B.V.Inventors: Nileshkumar Prakash Kukalyekar, Zhujuan Wang, Rudy Rulkens, Godefridus Bernardus Wilhelmus Leonardus Ligthart
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Publication number: 20140316062Abstract: A process for the production of a polyamide containing monomeric units of 1,4-butylene diamine, an aliphatic dicarboxylic acid having 6-12 carbon atoms and a fatty acid based dicarboxylic acid and/or diamine derived there from, which process comprises the steps of: a) making an aquous salt mixture containing 1,4-butylene diamine, the aliphatic dicarboxylic acid having 6-12 carbon atoms and the fatty acid based dicarboxylic acid and/or diamine derived there from, the mixture containing less than 50 wt % water and distilling the mixture to less than 15 wt % of water at a pressure of less than 16 barg, while keeping the mixture at a temperature high enough to keep it liquid, b) starting the polymerization of the mixture obtained in step a) by increasing the temperature until to at least 180° C.Type: ApplicationFiled: February 10, 2012Publication date: October 23, 2014Applicant: DSM IP ASSETS B.V.Inventors: Pim Gerard Anton Janssen, Rudy Rulkens, Godefridus Bernardus Wilhelmus Leonardus Ligthart