Patents by Inventor Robert T. Kazmierczak
Robert T. Kazmierczak 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: 5539061Abstract: This invention relates to novel peroxide blends which are liquid at 25.degree. C. and lower, their method of preparation and their use in curing peroxide crosslinkable polymers.The blend is a mixture of the meta isomers or the meta and para isomers of the compounds of Formulae I, II and III and optionally Formula IV (all as defined herein) in such proportions that the composition provides a liquid mixture at 25.degree. C. or below which has a high crosslinking efficiency for polymeric materials.Type: GrantFiled: May 12, 1995Date of Patent: July 23, 1996Assignee: ELF Atochem North America, Inc.Inventors: Robert T. Kazmierczak, Ronald E. MacLeay
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Patent number: 5314970Abstract: OO-t-alkyl O-polycaprolactone monoperoxy carbonate compounds comprising polycaprolactones end capped with OO-t-alkyl peroxy carbonate groups which compounds are useful in the preparation of polycaprolactone block and graft copolymers are disclosed. Also disclosed are processes for the preparation and use of the above compounds including use of the above compounds as compatibilizing agents for otherwise immiscible polymers, as well as intermediates useful in the preparative processes.Type: GrantFiled: January 7, 1993Date of Patent: May 24, 1994Assignee: Elf Atochem North America, Inc.Inventors: Ronald E. MacLeay, Jennifer P. Kmiec, Robert T. Kazmierczak
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Patent number: 5300545Abstract: N-(2,2,6,6-tetraalkyl-4-piperidinyl)amide-hydrazides of dicarboxylic acids contain a light stabilizing group, a heat stabilizing group, and a reactive hydrazide functionality in the same molecule. The reactive stabilizers are prepared by reacting 4-amino-2,2,6,6-tetraalkylpiperidines with diesters (or mono ester acid chlorides) of dicarboxylic acids or dialkyl itaconates followed by hydrazinolysis of the ester group of the intermediate mono esteramide. The compounds are useful for introducing permanent heat and light stability to coreactive polymers or copolymers. They are also useful in the stabilization of inert polymeric systems against the degradative effects of heat and light when merely mixed with, rather than reacted with, the polymers for which stabilization is sought.Type: GrantFiled: March 1, 1993Date of Patent: April 5, 1994Assignee: Elf Atochem North America, Inc.Inventors: Robert T. Kazmierczak, Ronald E. Mac Leay
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Patent number: 5214147Abstract: N-(2,2,6,6-tetraalkyl-4-piperidinyl)amide-hydrazides of dicarboxylic acids contain a light stabilizing group, a heat stabilizing group, and a reactive hydrazide functionality in the same molecule. The reactive stabilizers are prepared by reacting 4-amino-2,2,6,6-tetraalkylpiperidines with diesters (or mono ester acid chlorides) of dicarboxylic acids or dialkyl itaconates followed by hydrazinolysis of the ester group of the intermediate mono esteramide. The compounds are useful for introducing permanent heat and light stability to coreactive polymers or copolymers. They are also useful in the stabilization of inert polymeric systems against the degradative effects of heat and light when merely mixed with, rather than reacted with, the polymers for which stabilization is sought.Type: GrantFiled: December 6, 1991Date of Patent: May 25, 1993Assignee: Elf Atochem North America, Inc.Inventors: Robert T. Kazmierczak, Ronald E. MacLeay
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Patent number: 5101033Abstract: N-(2,2,6,6,-tetraalkyl-4-piperidinyl)amide-hydrazides of dicarboxylic acids contain a light stabilizing group, a heat stabilizing group, and a reactive hydrazide functionality in the same molecule. The reactive stabilizers are prepared by reacting 4-amino-2,2,6,6-tetraalkylpiperidines with diesters (or mono ester acid chlorides) of dicarboxylic acids or dialkyl itaconates followed by hydrazinolysis of the ester group of the intermediate mono esteramide. The compounds are useful for introducing permanent heat and light stability to coreactive polymers or copolymers. They are also useful in the stabilization of inert polymeric systems against the degradative effects of heat and light when merely mixed with, rather than reacted with, the polymers for which stabilization is sought.Type: GrantFiled: November 27, 1990Date of Patent: March 31, 1992Assignee: Atochem North America, Inc.Inventors: Robert T. Kazmierczak, Ronald E. MacLeay
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Patent number: 4983738Abstract: N-(2,2,6,6-tetraalkyl-4-piperidinyl)amide-hydrazides of dicarboxylic acids contain a light stabilizing group, a heat stabilizing group, and a reactive hydrazide functionality in the same molecule. The reactive stabilizers are prepared by reacting 4-amino-2,2,6,6-tetraalkylpiperidines with diesters (or mono ester acid chlorides) of dicarboxylic acids or dialkyl itaconates followed by hydrazinolysis of the ester group of the intermediate mono esteramide. The compounds are useful for introducing permanent heat and light stability to coreactive polymers or copolymers. They are also useful in the stabilization of inert polymeric systems against the degradative effects of heat and light when merely mixed with, rather than reacted with, the polymers for which stabilization is sought.Type: GrantFiled: February 13, 1989Date of Patent: January 8, 1991Assignee: Atochem North America, Inc.Inventors: Robert T. Kazmierczak, Ronald E. Mac Leay
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Patent number: 4978699Abstract: This invention provides novel hindered amine light stabilizers with flame retardant properties. The compounds of this invention protect polymeric compositions against the degradative effects of heat and light and simultaneously improve the flammability rating of the polymeric composition, while also contributing antioxidant and metal deactivation properties to the polymeric compositions.The compositions of this invention are prepared by reacting halogenated flame retardant containing a cyclic anhydride group with hindered amine light stabilizers containing primary amino or reactive hydrazido functional groups. The preparation of the novel compositions may be carried out in inert solvents or in inert polymeric compositions in a melt blending step.Type: GrantFiled: October 24, 1988Date of Patent: December 18, 1990Assignee: Atochem North America, Inc.Inventors: Robert T. Kazmierczak, Ronald E. MacLeay
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Patent number: 4824884Abstract: Amic acids, cyclic imides and mixtures thereof which contain both diacyl hydrazide functionalities and hindered amine functionalities are prepared by reacting non-halogenated cyclic anhydrides with hindered amine light stabilizers containing reactive hydrazido funtionalities in inert solvents or in inert polymeric compositions in a melt blending step. The compositions protect polymeric compositions against the degradative effects of heat and light.Type: GrantFiled: August 12, 1987Date of Patent: April 25, 1989Assignee: Pennwalt CorporationInventors: Ronald E. MacLeay, Robert T. Kazmierczak
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Patent number: 4801749Abstract: Phenolic antioxidant hydrazides are provided which are useful to stabilize organic materials (such as synthetic polymers) which are subject to oxidative degradation.Type: GrantFiled: August 12, 1987Date of Patent: January 31, 1989Assignee: Pennwalt CorporationInventors: Robert T. Kazmierczak, Ronald E. MacLeay, Jerome Wicher
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Patent number: 4243821Abstract: An olefin such as .alpha.-methylstyrene or a substituted .alpha.-methylstyrene, wherein the substituent is on the phenyl ring, a t-cumyl halide corresponding to the hydrohalogenated olefin or a substituted t-cumyl chloride and hydrogen peroxide are reacted under relatively non-aqueous conditions, in the absence of a free acid and in the presence of a phenol, to obtain a symmetrical dicumyl (or substituted dicumyl) peroxide which is useful as cross-linking agents for polyethylene and elastomers.Type: GrantFiled: September 13, 1979Date of Patent: January 6, 1981Assignee: Pennwalt CorporationInventors: Ronald E. MacLeay, Robert T. Kazmierczak