Patents by Inventor Changkiu K. Riew
Changkiu K. Riew 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: 5080968Abstract: Fiber reinforced composites are comprised of a vinyl resin composition and fibrous reinforcement material which is coated with a uniformly thin and continuous elastomeric coating. The coating is prepared from an aqueous dispersion containing a reactive liquid polymer composition, an epoxy resin and a curing agent.Type: GrantFiled: February 20, 1990Date of Patent: January 14, 1992Assignee: The B. F. Goodrich CompanyInventors: Changkiu K. Riew, Alan R. Siebert, Frrederick J. McGarry, Philip L. Kinson
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Patent number: 5000981Abstract: Fibers are conveniently coated with a uniformly thin and continuous elastomeric coating by contacting the fibers with a (1) a water-dispersed reactive polymer, (2) epoxy resin, and (3) curing agent; and wherein said water-dispersed reactive polymer is a composition comprising. (a) a lower molecular weight reactive polymer, (b) a select solvent, (c) a dispersing agent, and (d) water. The elastomeric films have a Tg value of about 0.degree. C. or below. The elastomer coated fibers are useful as strengtheners and impact modifiers for brittle materials such as epoxy resins.Type: GrantFiled: September 5, 1989Date of Patent: March 19, 1991Assignee: The B. F. Goodrich CompanyInventors: Frederick J. McGarry, Alan R. Siebert, Changkiu K. Riew
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Patent number: 4883841Abstract: Polycarbonates are blended with an impact modifier to improve the impact resistance thereof. The impact modifier is a multiple phase polymer system prepared by subsequent multiple stage polymerizations. The first phase which constitutes from about 50 percent to about 90 percent by weight of the multiple phase impact modifier is generally an elastomer such as an alkyl acrylate wherein the alkyl portion has from 2 to 18 carbon atoms. The second phase polymer is generally a plastic type compound such as a vinyl substituted aromatic, an alkyl methacrylate, or an alkenyl nitrile compound. The impact modifiers are made without utilizing any crosslinking or grafting agents and thus are substantially free of any such bonds and are generally free-flowing powders.Type: GrantFiled: October 5, 1988Date of Patent: November 28, 1989Assignee: The B.F. Goodrich CompanyInventors: Changkiu K. Riew, Roger E. Morris
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Patent number: 4496692Abstract: Improved molding composition comprising (1) polyvinyl chloride, which is blended with a dehydrochlorinating agent such as a stannous salt; (2) a free-radically polymerizable monomer and/or macromer, wherein the monomer contains at least one terminal CH.sub.2 .dbd.C< group per molecule and the macromer contains at least one double bond in the polymeric backbone; (3) an ionically polymerizable monomer and/or macromer containing the oxirane group ##STR1## with an optional curing agent; (4) a heterofunctional monomer containing at least one oxirane group and at least one CH.sub.2 .dbd.C< group per molecule; and (5) a free radical initiator results in an improvement in thermo-mechanical properties.Type: GrantFiled: December 30, 1983Date of Patent: January 29, 1985Assignee: The B. F. Goodrich CompanyInventors: Changkiu K. Riew, Frank H. Howard
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Patent number: 4489008Abstract: Hydrolytically stable hydroxyl-terminated liquid polymers that are useful in the preparation of polyurethanes prepared by reacting at least one aminoalcohol with a carboxyl-terminated liquid polymer having a carbon-carbon backbone. The hydroxyl-terminated polymers have the formula ##STR1## wherein B is a carbon-carbon backbone, X is HO-- or HO--Y-- a univalent radical obtained by removing a hydrogen atom from an amine group of aminoalcohol containing one primary or secondary hydroxyl group and one primary or secondary amine group per molecule, and the polymers contain an average of greater than 1.5 terminal hydroxyl groups per molecule.Type: GrantFiled: August 9, 1982Date of Patent: December 18, 1984Assignee: The B. F. Goodrich CompanyInventor: Changkiu K. Riew
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Patent number: 4481148Abstract: Hydroxyl-containing liquid polymers having an aliphatic polymeric backbone and sulfide linkages near the terminal portions of the polymer molecule are prepared by polymerizing (1) at least one of selected vinylidene monomers having at least one terminal CH.sub.2 .dbd.C< group per monomer molecule, together with (2) at least one hydroxyl-containing disulfide in the presence of (3) ultraviolet radiation.Type: GrantFiled: March 16, 1981Date of Patent: November 6, 1984Assignee: The B. F. Goodrich CompanyInventor: Changkiu K. Riew
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Patent number: 4290939Abstract: The novel aspect of this invention resides in co-reacting a toughening agent with components of an unsaturated polyester resin in order to introduce the toughening agent into the backbone of the unsaturated polyester resin and thus produce a toughened stable resin. Suitable toughening agents are carboxyl and hydroxyl terminated reactive liquid polymers which are used in amount of 1 to 30, preferably 1 to 15 parts by weight per 100 parts by weight of reactant monomers used to prepare the polyester resin.Type: GrantFiled: March 27, 1980Date of Patent: September 22, 1981Assignee: The B. F. Goodrich CompanyInventors: Robert J. Bertsch, Changkiu K. Riew
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Patent number: 4274994Abstract: Terminally unsaturated liquid epihalohydrin polymers are produced by polymerizing at least one epihalohydrin using acrylic acid or methacrylic acid as a modifier. The polymerization is conducted in the presence of a catalytic amount of a trialkyl oxonium salt of an HMF.sub.6 acid wherein M is an element selected from the group consisting of phosphorus, arsenic and antimony. The polymers are useful as tougheners for unsaturated polyester resin systems.Type: GrantFiled: June 13, 1980Date of Patent: June 23, 1981Assignee: The B. F. Goodrich CompanyInventor: Changkiu K. Riew
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Patent number: 4256904Abstract: Terminally unsaturated liquid epihalohydrin polymers are produced by polymerizing at least one epihalohydrin using acrylic acid or methacrylic acid as a modifier. The polymerization is conducted in the presence of a catalytic amount of a trialkyl oxonium salt of an HMF.sub.6 acid wherein M is an element selected from the group consisting of phosphorus, arsenic and antimony. The polymers are useful as tougheners for unsaturated polyester resin systems.Type: GrantFiled: September 6, 1979Date of Patent: March 17, 1981Assignee: The B. F. Goodrich CompanyInventor: Changkiu K. Riew
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Patent number: 4133957Abstract: Amine-terminated liquid polymers are prepared by reacting a carboxyl-terminated, ester-terminated or acid chloride-terminated liquid polymer having a carbon-carbon backbone with at least one aliphatic, alicyclic, heterocyclic or aromatic amine containing at least two secondary or mixed primary/secondary amine groups, but no more than one primary amine group per molecule. The novel amine-terminated polymers are useful as elastic vulcanizates, polymeric cure agents, tougheners and flexibilizers for epoxy resins, in paints and coatings, in sealants and adhesives, and the like.Type: GrantFiled: December 20, 1976Date of Patent: January 9, 1979Assignee: The B. F. Goodrich CompanyInventor: Changkiu K. Riew
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Patent number: 4129670Abstract: Room-temperature-curable compositions can be prepared readily by mixing (A) 100 parts by weight of at least one non-cycloaliphatic epoxy resin and (B) from about 1 to about 1,000 parts by weight of at least one amine-terminated liquid polymer having a carbon-carbon backbone, (C) optionally, a chain extender or crosslinker and (D) optionally, a curing agent. The compositions are useful as castable elastomeric systems, as toughened structural plastics, as paints and coatings, as sealants and adhesives, and the like.Type: GrantFiled: August 15, 1977Date of Patent: December 12, 1978Assignee: The B. F. Goodrich CompanyInventor: Changkiu K. Riew
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Patent number: 4088708Abstract: Compositions may be reacted partially to a thermoplastic, elastomeric intermediate stage (B-stage) having excellent shelf stability at room temperature. The thermoplastic (B-stage) compositions may be heated to cure to a thermoset, elastomeric, tack-free final stage (C-stage). The compositions comprise (A) 1 equivalent weight of at least one cycloaliphatic epoxy resin, (B) from about 0.05 to about 0.5 equivalent weight of at least one amine-terminated liquid polymer having a carbon-carbon backbone and (C) from about 0.4 to about 1.5 equivalent weight of at least one anhydride. The compositions are useful as solventless adhesives (alone or compounded with rubber stock or the like) for conveyor belts, hoses, shoes, iron-on clothing patches, and the like. The compositions are also useful as paints, powder coatings, binders for woven or non-woven fibers and cords, and the like.Type: GrantFiled: February 23, 1976Date of Patent: May 9, 1978Assignee: The B. F. Goodrich CompanyInventor: Changkiu K. Riew
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Patent number: 3966837Abstract: Hard and strong epoxy resin products of high impact resistance are made from a di-epoxy compound, a smaller than equivalent proportion of chain extender which is preferably a bis-phenol, and about 5% (based on the amount of the di-epoxy compound) of a functionally terminated elastomer which is preferably a phenol terminated liquid copolymer of butadiene and acrylonitrile, together with a curing agent active at elevated temperatures.Type: GrantFiled: December 20, 1971Date of Patent: June 29, 1976Assignee: The B. F. Goodrich CompanyInventors: Changkiu K. Riew, Alan R. Siebert, Eugene H. Rowe
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Patent number: RE31469Abstract: Terminally unsaturated liquid epihalohydrin polymers are produced by polymerizing at least one epihalohydrin using acrylic acid or methacrylic acid as a modifier. The polymerization is conducted in the presence of a catalytic amount of a trialkyl oxonium salt of an HMF.sub.6 acid wherein M is an element selected from the group consisting of phosphorus, arsenic and antimony. The polymers are useful as tougheners for unsaturated polyester resin systems.Type: GrantFiled: March 15, 1983Date of Patent: December 20, 1983Assignee: The B. F. Goodrich CompanyInventor: Changkiu K. Riew
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Patent number: RE31577Abstract: Terminally unsaturated liquid epihalohydrin polymers are produced by polymerizing at least one epihalohydrin using acrylic acid or methacrylic acid as a modifier. The polymerization is conducted in the presence of a catalytic amount of a trialkyl oxonium salt of an HMF.sub.6 acid wherein M is an element selected from the group consisting of phosphorus, arsenic and antimony. The polymers are useful as tougheners for unsaturated polyester resin systems.Type: GrantFiled: June 21, 1983Date of Patent: May 1, 1984Assignee: The B. F. Goodrich CompanyInventor: Changkiu K. Riew