Patents by Inventor Arthur J. Yu

Arthur J. Yu 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).

  • Patent number: 4424316
    Abstract: Reaction of a diepoxide with a mono-, or, preferably, dicarboxylic acid yields a prepolymer having both hydroxy and epoxy groups. This prepolymer, when reacted with a polyisocyanate, yields a poly(oxazolidone/urethane) thermoset composition which is substantially free of isocyanurate linkages. The thermoset contains oxazolidone linkages in its backbone which are separated from one another by ester linkages. Urethane linkages are present in side chains attached to the polymer backbone of the thermoset.
    Type: Grant
    Filed: October 8, 1981
    Date of Patent: January 3, 1984
    Assignee: Stauffer Chemical Company
    Inventors: Anthony L. DiSalvo, Arthur J. Yu
  • Patent number: 4223104
    Abstract: Improved copoly(carbonate/phosphonate) compositions formed by reaction of a dihydric phenol, a carbonate precursor, and an organophosphorus dihalide are disclosed. The inherent viscosity and melting point of such compositions is increased by the presence of an effective amount of a chain branching agent, optionally in the additional presence of a chain terminating agent.
    Type: Grant
    Filed: August 11, 1978
    Date of Patent: September 16, 1980
    Assignee: Stauffer Chemical Company
    Inventors: Ki-Soo Kim, Arthur J. Yu, Siegfried Altscher
  • Patent number: 4210739
    Abstract: An internally plasticized vinyl chloride copolymer composition having good low temperature flexibility and tensile properties is disclosed. It consists essentially of from about 45% to about 80%, by weight, vinyl chloride, from about 15% to about 54%, by weight, of a C.sub.2 -C.sub.10 alkyl acrylate, and from about 1% to about 15%, by weight, of one or more C.sub.8 -C.sub.22 dialkyl maleate and/or fumarate. The copolymer is formed using conventional suspension, emulsion, bulk and solution polymerization procedures.
    Type: Grant
    Filed: July 21, 1978
    Date of Patent: July 1, 1980
    Assignee: Stauffer Chemical Company
    Inventors: Ruth E. Gallagher, Jagadish C. Goswami, Paul Kraft, Arthur J. Yu
  • Patent number: 4206296
    Abstract: Polyester compositions containing an effective amount for flame retardancy of a copolymer of (1) benzene phosphorus oxydichloride, (2) 2,4'-thiodiphenol, 4,4'-thiodiphenol, 2,4'-sulfonyl diphenol, 4,4'-sulfonyl diphenol or mixtures thereof, and (3) POCl.sub.3 are disclosed.
    Type: Grant
    Filed: September 15, 1975
    Date of Patent: June 3, 1980
    Assignee: Stauffer Chemical Company
    Inventors: Arthur J. Yu, Siegfried Altscher, Ki S. Kim
  • Patent number: 4187159
    Abstract: Crosslinked polyvinyl chloride foams are formed by first expanding a polyvinyl chloride containing plastisol comprising a blowing agent, and a reactive crosslinking plasticizer to form a foamed composition and then subjecting the foamed composition to irradiation to crosslink the foamed composition via the crosslinking plasticizer.
    Type: Grant
    Filed: July 28, 1976
    Date of Patent: February 5, 1980
    Assignee: Stauffer Chemical Company
    Inventors: Jagadish C. Goswami, Arthur J. Yu
  • Patent number: 4178423
    Abstract: Polymerization of vinyl chloride monomer, by either suspension or emulsion polymerization, optionally in the presence of a monoethylenically unsaturated comonomer, is carried out in the presence of a mixture of calcium and zinc acrylate. The presence of the calcium and zinc acrylate yields a more thermally stable product and reduces the amount of polymer scale formation during polymerization. A further improvement in thermal stability is achieved by conducting the polymerization with the added presence of an epoxy compound containing a reactive vinyl or allyl group.
    Type: Grant
    Filed: September 14, 1978
    Date of Patent: December 11, 1979
    Assignee: Stauffer Chemical Company
    Inventors: Donald F. Anderson, Arthur J. Yu
  • Patent number: 4148842
    Abstract: Blends of a polycarbonate resin and an interpolymer modifier comprising crosslinked (meth)acrylate, crosslinked styrene-acrylonitrile, and uncrosslinked styrene-acrylonitrile polymeric components are disclosed. The blends have improved processing as compared to the processing characteristics of the polycarbonate resin alone and are impact resistant. They are more weather resistant than blends of the polycarbonate resin and ABS graft copolymers.
    Type: Grant
    Filed: June 15, 1978
    Date of Patent: April 10, 1979
    Assignee: Stauffer Chemical Company
    Inventors: Arthur J. Yu, Joseph Silberberg
  • Patent number: 4146698
    Abstract: Polymerization of vinyl chloride monomer, by either suspension or emulsion polymerization, optionally in the presence of a monoethylenically unsaturated comonomer, is carried out in the presence of a mixture of calcium and zinc acrylate. The presence of the calcium and zinc acrylate yields a more thermally stable product and reduces the amount of polymer scale formation during polymerization. A further improvement in thermal stability is achieved by conducting the polymerization with the added presence of an epoxy compound containing a reactive vinyl or allyl group.
    Type: Grant
    Filed: October 6, 1977
    Date of Patent: March 27, 1979
    Assignee: Stauffer Chemical Company
    Inventors: Donald F. Anderson, Arthur J. Yu
  • Patent number: 4093788
    Abstract: The use of an anthraquinone sulfonate as an additive in an aqueous suspension or emulsion medium containing a vinyl chloride monomer substantially reduces the formation of polymer scale which is normally deposited on the inner walls of the polymerization vessel after a suspension or emulsion polymerization has been conducted.
    Type: Grant
    Filed: June 24, 1974
    Date of Patent: June 6, 1978
    Assignee: Stauffer Chemical Company
    Inventors: Jung Il Jin, Arthur J. Yu
  • Patent number: 4088710
    Abstract: The gel time of unsaturated polyester thermosetting resins containing polymerizable vinyl monomers, such a styrene, and a vinylphosphonate flame retardant, such as the bis(hydrocarbyl)vinylphosphonates, which normally retards the gel time of such resins, is reduced by the addition of an effective amount for gel time reduction of maleic anhydride.
    Type: Grant
    Filed: March 29, 1977
    Date of Patent: May 9, 1978
    Assignee: Stauffer Chemical Company
    Inventors: Anthony J. Spak, Arthur J. Yu
  • Patent number: 4080402
    Abstract: Flame retardant polymers of benzene phosphorus oxydichloride and 4,4'-thiodiphenol are disclosed which are preferably formed by reacting these monomers in an inert organic solvent at ambient temperature in the presence of an amine acid acceptor. Also disclosed are polyester compositions containing such polymers as a flame retardant additive.
    Type: Grant
    Filed: September 15, 1975
    Date of Patent: March 21, 1978
    Assignee: Stauffer Chemical Company
    Inventor: Arthur J. Yu
  • Patent number: 4071675
    Abstract: A one-step process for the emulsion polymerization of vinyl chloride using a water-soluble initiator and an aqueous emulsifier system of (1) a C.sub.12 -C.sub.18 straight chain alkyl or alkenyl phosphate surfactant and (2) a C.sub.12 -C.sub.20 straight chain alkyl or alkenyl alcohol and/or a straight chain saturated hydrocarbon having a carbon content of greater than 18 is disclosed. One suitable example of a straight chain phosphate surfactant is sodium lauryl phosphate. Suitable alcohols include stearyl alcohol, cetyl alcohol and eicosanol. A suitable hydrocarbon is eicosane. The resulting homo- and copolymer latices can be used in plastisols and organosols.
    Type: Grant
    Filed: March 3, 1977
    Date of Patent: January 31, 1978
    Assignee: Stauffer Chemical Company
    Inventors: Arthur J. Yu, Donald F. Anderson
  • Patent number: 3944631
    Abstract: An impact-resistant and weatherable thermoplastic composition comprising from about 10 to about 50 weight percent of a crosslinked acrylate elastomer having a Tg of less than 25.degree.C., from about 5 to about 35 weight percent of a crosslinked styrene-acrylonitrile copolymer and from about 15 to about 85 weight percent of a non-crosslinked or linear styrene-acrylonitrile copolymer. The composition is made by a three-step sequence comprising emulsion polymerizing of an alkyl acrylate containing at least one crosslinking monomer, emulsion polymerizing a monomer mixture of styrene, acrylonitrile and at least one crosslinking monomer in the presence of the crosslinked acrylate elastomer formed in the previous step, or a reverse sequence of the prior two emulsion polymerization procedures, and, finally, emulsion or suspension polymerizing of styrene, acrylonitrile in the presence of the previously formed product.
    Type: Grant
    Filed: February 1, 1974
    Date of Patent: March 16, 1976
    Assignee: Stauffer Chemical Company
    Inventors: Arthur J. Yu, Ruth E. Gallagher