Patents by Inventor Zhujuan Wang
Zhujuan Wang 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: 11377554Abstract: The invention relates to a chain guide, respectively a chain tensioner for use in a lubricated sliding system, comprising a surface layer or bearing or comprising a sliding element comprising a surface layer, the surface layer being mainly made of a polymeric material containing a matrix polymer and optionally other components dispersed in said matrix polymer, wherein the matrix polymer consists of a semi-crystalline polyamide (SCPA) having a tensile modulus at 140° C. of at least 800 MPa (measured by the method according to ISO 527-1A). The invention also relates to a power train drive system comprising an engine, a transmission differential and a drive shaft system, a drive chain and a plastic component comprising a sliding element in contact with the lubricated drive chain, wherein the chain guide, the chain tensioner, respectively the sliding element has a coefficient of friction (CoF), measured in lubrication oil at 140° C. at a nominal contact pressure of 1 MPa and a speed of 1 m/s, of at most 0.07.Type: GrantFiled: January 8, 2018Date of Patent: July 5, 2022Assignee: DSM IP ASSETS B.V.Inventors: Roy Antoine Hendrikus Wilhelmus Proost, Michael Hubertus Helena Meuwissen, Zhujuan Wang
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Patent number: 10920026Abstract: The present invention relates to a polymer composition, consisting of (A) 30-90 wt. % of at least one thermoplastic polymer comprising at least a semi-crystalline semi-aromatic polyamide (SSPA-1) in an amount in the range of 30-90 wt. %; (B) 10-70 wt. % of at least one reinforcing agent, and (C) 0-25 wt. % of one or more other components; wherein the SSPA-1 consists of (A-1-a) 90-100 wt. % of repeat units derived from (i) an aromatic dicarboxylic acid and (ii) diamines, and (A-1-b) 0-10 wt. % of repeat units derived from other monomers; the diamines (ii) consist of 80-95 mole % of a linear aliphatic diamine, 5-20 mole % of 2-methyl-pentamethylene diamine, and 0-10 mole % of other diamines; and the SSPA-1 has a melting temperature (Tm) of at least 300° C. The invention further relates to a molded part made of the composition, a process for making the composition and a process for making the molded part.Type: GrantFiled: September 27, 2017Date of Patent: February 16, 2021Assignee: DSM IP ASSETS B.V.Inventor: Zhujuan Wang
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Publication number: 20200165450Abstract: Thermoplastic compositions are disclosed which include: a) a polyamide component comprising at least three amide monomer units and b) a stabilizer, wherein at least one of the at least three amide monomer units is an aliphatic amide monomer unit having a carbon to nitrogen ratio (C/N) equal to, or above 6.5, in that at least two of the at least three amide monomer units are semi-aromatic amide monomer units which polymerized provide at least one semi-crystalline semi-aromatic polyamide having a melting temperature of at least 290° C. as measured by DSC at a heating rate of 10° C./min according to standard ISO 11357-3 (2009), and in that the amount of aliphatic amide monomer unit is in the range from 20 to 60 wt. % relative to the total weight of the at least three amide monomer units in the polyamide components and the total amount of semi-aromatic amide monomer units is in the range from 40 to 80 wt.Type: ApplicationFiled: January 31, 2020Publication date: May 28, 2020Inventors: Zhujuan WANG, Johannes HOEKSTRA, Pim Gerard Anton JANSSEN
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Patent number: 10597534Abstract: The present invention relates to a thermoplastic composition comprising: a) a polyamide component comprising at least three amide monomer units and b) a stabilizer characterized in that at least one of the at least three amide monomer units is an aliphatic amide monomer unit having a carbon to nitrogen ratio (C/N) equal to, or above 6.5, in that at least two of the at least three amide monomer units are semi-aromatic amide monomer units which polymerized provide at least one semi-crystalline semi-aromatic polyamide having a melting temperature of at least 290° C. as measured by DSC at a heating rate of 10° C./min according to standard ISO 1 1357-3 (2009), and in that the amount of aliphatic amide monomer unit is in the range from 20 to 60 wt. % relative to the total weight of the at least three amide monomer units in the polyamide components and the total amount of semi-aromatic amide monomer units is in the range from 40 to 80 wt.Type: GrantFiled: September 29, 2015Date of Patent: March 24, 2020Assignee: DSM IP ASSETS B.V.Inventors: Zhujuan Wang, Johannes Hoekstra, Pim Gerard Anton Janssen
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Publication number: 20190225803Abstract: The present invention relates to a polymer composition, consisting of (A) polymer comprising at least (A-1) a first semi-crystalline semi-aromatic polyamide (SSPA); and (A-2) a functionalized polymer; (B) 5-69 wt. % of reinforcing agent; and (C) 0-25 wt. % of one or more other components; wherein the SSPA is present in an amount in the range of 30-90 wt. %; has a melting temperature (Tm) of at least 300° C., measured by DSC according to ISO-11357-1/3, 2011 with heating and cooling rate of 10° C./min; and consists of: (A-1-a) 90-100 mole % of repeat units derived from (i) aromatic dicarboxylic acid and (ii) diamines, and (A-1-b) 0-10 mole % of repeat units derived from other monomers; and the diamines (ii) consist of 80-95 mole % of linear aliphatic diamine, 5-20 mole % of 2-methyl-pentamethylene diamine, and 0-10 mole % of other diamines; wherein the functionalized polymer (A-2) comprises a functionalized semi-crystalline polyolefin in an amount of 1-15 wt. %; and wherein the weight percentages (wt.Type: ApplicationFiled: September 27, 2017Publication date: July 25, 2019Inventor: Zhujuan WANG
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Publication number: 20190225760Abstract: The present invention relates to a polymer composition, consisting of (A) 30-90 wt. % of at least one thermoplastic polymer comprising at least a semi-crystalline semi-aromatic polyamide (SSPA-1) in an amount in the range of 30-90 wt. %; (B) 10-70 wt. % of at least one reinforcing agent, and (C) 0-25 wt. % of one or more other components; wherein the SSPA-1 consists of (A-1-a) 90-100 wt. % of repeat units derived from (i) an aromatic dicarboxylic acid and (ii) diamines, and (A-1-b) 0-10 wt. % of repeat units derived from other monomers; the diamines (ii) consist of 80-95 mole % of a linear aliphatic diamine, 5-20 mole % of 2-methyl-pentamethylene diamine, and 0-10 mole % of other diamines; and the SSPA-1 has a melting temperature (Tm) of at least 300° C. The invention further relates to a molded part made of the composition, a process for making the composition and a process for making the molded part.Type: ApplicationFiled: September 27, 2017Publication date: July 25, 2019Inventor: Zhujuan WANG
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Publication number: 20180128353Abstract: The invention relates to a chain guide, respectively a chain tensioner for use in a lubricated sliding system, comprising a surface layer or bearing or comprising a sliding element comprising a surface layer, the surface layer being mainly made of a polymeric material containing a matrix polymer and optionally other components dispersed in said matrix polymer, wherein the matrix polymer consists of a semi-crystalline polyamide (SCPA) having a tensile modulus at 140° C. of at least 800 MPa (measured by the method according to ISO 527-1A). The invention also relates to a power train drive system comprising an engine, a transmission differential and a drive shaft system, a drive chain and a plastic component comprising a sliding element in contact with the lubricated drive chain, wherein the chain guide, the chain tensioner, respectively the sliding element has a coefficient of friction (CoF), measured in lubrication oil at 140° C. at a nominal contact pressure of 1 MPa and a speed of 1 m/s, of at most 0.07.Type: ApplicationFiled: January 8, 2018Publication date: May 10, 2018Inventors: Roy Antoine Hendrikus Wilhelmus PROOST, Michael Hubertus Helena MEUWISSEN, Zhujuan WANG
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Patent number: 9890836Abstract: The invention relates to a chain guide, respectively a chain tensioner for use in a lubricated sliding system, comprising a surface layer or bearing or comprising a sliding element comprising a surface layer, the surface layer being mainly made of a polymeric material containing a matrix polymer and optionally other components dispersed in said matrix polymer, wherein the matrix polymer consists of a semi-crystalline polyamide (SCPA) having a tensile modulus at 140° C. of at least 800 MPa (measured by the method according to ISO 527-1A). The invention also relates to a power train drive system comprising an engine, a transmission differential and a drive shaft system, a drive chain and a plastic component comprising a sliding element in contact with the lubricated drive chain, wherein the chain guide, the chain tensioner, respectively the sliding element has a coefficient of friction (Co F), measured in lubrication oil at 140° C. at a nominal contact pressure of 1 MPa and a speed of 1 m/s, of at most 0.07.Type: GrantFiled: December 21, 2011Date of Patent: February 13, 2018Assignee: DSM IP ASSETS B.V.Inventors: Roy Antoine Hendrikus Wilhelmus Proost, Michael Hubertus Helena Meuwissen, Zhujuan Wang
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Publication number: 20170298225Abstract: The present invention relates to a thermoplastic composition comprising: a) a polyamide component comprising at least three amide monomer units and b) a stabilizer characterized in that at least one of the at least three amide monomer units is an aliphatic amide monomer unit having a carbon to nitrogen ratio (C/N) equal to, or above 6.5, in that at least two of the at least three amide monomer units are semi-aromatic amide monomer units which polymerized provide at least one semi-crystalline semi-aromatic polyamide having a melting temperature of at least 290° C. as measured by DSC at a heating rate of 10° C./min according to standard ISO 1 1357-3 (2009), and in that the amount of aliphatic amide monomer unit is in the range from 20 to 60 wt. % relative to the total weight of the at least three amide monomer units in the polyamide components and the total amount of semi-aromatic amide monomer units is in the range from 40 to 80 wt.Type: ApplicationFiled: September 29, 2015Publication date: October 19, 2017Inventors: Zhujuan WANG, Johannes HOEKSTRA, Pim Gerard Anton JANSSEN
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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: 20150368467Abstract: The invention relates a heat stabilized thermoplastic polymer composition comprising polyamide polymer and a heat stabilizer system, as well as moulded parts made thereof. The thermoplastic polymer composition comprises (A) a blend of at least two polyamide polymers comprising a first polyamide (a.1) being a semi-crystalline polyamide with a melting temperature of at least 240° C. and a second polyamide (a.2) being either polyamide 6 or a copolyamide of polyamide-6 and another polyamide, (B) a heat stabilizer system; and (C) a polyarylene sulfide polymer, wherein (A) and (C) are present in a weight ratio in the range of 90:10-20:80.Type: ApplicationFiled: August 27, 2015Publication date: December 24, 2015Inventors: Konraad Albert Louise Hector DULLAERT, Zhujuan WANG, Wilhelmus Josephus Maria SOUR
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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: 20140335985Abstract: The invention relates to a sliding element for use in a chain transmission apparatus, comprising a sliding contact section for engagement in sliding contact with a chain, wherein the sliding contact section consists of a plastic material comprising a matrix polymer and dispersed therein graphite platelets comprising platelet particles having a thickness of at most 250 nm. The invention relates to an engine comprising a first sliding element in sliding contact with a second element, wherein at least a sliding contact section is made of such a plastic material comprising such thin graphite platelets. The invention further relates to a chain transmission apparatus, comprising a chain, and a sliding element comprising (i) a sliding contact section engaged in sliding contact with the chain and (ii) a main body reinforcing and supporting the sliding contact section, wherein the sliding contact section consists of such a plastic material.Type: ApplicationFiled: December 11, 2012Publication date: November 13, 2014Inventors: Zhujuan Wang, Michael Hubertus Helena Meuwissen, Roy Antoine Hendrikus Wilhelmus Proost
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Publication number: 20140235798Abstract: 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: ApplicationFiled: June 25, 2012Publication date: August 21, 2014Applicant: DSM IP ASSETS B.V.Inventors: Nileshkumar Prakash Kukalyekar, Zhujuan Wang, Rudy Rulkens, Godefridus Ligthart
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Publication number: 20140106914Abstract: The invention relates to a chain guide, respectively a chain tensioner for use in a lubricated sliding system, comprising a surface layer or bearing or comprising a sliding element comprising a surface layer, the surface layer being mainly made of a polymeric material containing a matrix polymer and optionally other components dispersed in said matrix polymer, wherein the matrix polymer consists of a semi-crystalline polyamide (SCPA) having a tensile modulus at 140° C. of at least 800 MPa (measured by the method according to ISO 527-1A). The invention also relates to a power train drive system comprising an engine, a transmission differential and a drive shaft system, a drive chain and a plastic component comprising a sliding element in contact with the lubricated drive chain, wherein the chain guide, the chain tensioner, respectively the sliding element has a coefficient of friction (Co F), measured in lubrication oil at 140° C. at a nominal contact pressure of 1 MPa and a speed of 1 m/s, of at most 0.07.Type: ApplicationFiled: December 21, 2011Publication date: April 17, 2014Applicant: DSM IP ASSETS B.V.Inventors: Roy Antoine Hendrikus Wilhelmus Proost, Michael Hubertus Helena Meuwissen, Zhujuan Wang