Patents Examined by V. P. Hoke
  • Patent number: 6156834
    Abstract: The present invention provides a polyacetal resin composition improved, when molded, in environmental stress cracking resistance and in the physical properties of the weld portion. Environmental stress cracking resistance and physical properties of the weld portion before a heat aging resistance test can be improved by adding, to 100 parts by weight of a polyacetal resin, 0.001 to 1.0 part by weight of a difatty acid alkaline earth metal salt produced using two or more kinds of fatty acid and an alkaline earth metal. Also, the physical properties of the weld portion after a heat aging resistance test can be improved by further adding particular fatty acid ester compounds.
    Type: Grant
    Filed: March 17, 1999
    Date of Patent: December 5, 2000
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Toshiharu Seyama, Mikio Oka, Makoto Doki
  • Patent number: 4521557
    Abstract: Flame retardant copolyetherester elastomer compositions containing effective concentrations of N,N'-ethylenebis(tetrabromophthalimide), antimony trioxide, and fumed silica.
    Type: Grant
    Filed: June 23, 1983
    Date of Patent: June 4, 1985
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: James M. McKenna
  • Patent number: 4515666
    Abstract: An olefinic polymer composition is provided which comprises an olefinic polymer selected from homopolymers and copolymers made from aliphatic, ethylenically unsaturated monomers containing from 2 to about 10 carbon atoms; from about 100 to about 3,000 parts per million based on the weight of the total composition of a hindered phenolic stabilizer; and from about 100 to about 10,000 ppm based on the weight of the composition of a stabilizer selected from compounds of the formula: ##STR1## wherein M is 0 or 1; R.sub.1 and R.sub.2 are each independently selected from hydrogen or an alkyl group containing from 1 to about 20 carbon atoms.
    Type: Grant
    Filed: February 28, 1983
    Date of Patent: May 7, 1985
    Assignee: Milliken Research Corporation
    Inventor: John W. Rekers
  • Patent number: 4492766
    Abstract: Spray-coating materials having a high heat-resistance and thermal conductivity for the surface protection of materials. The spray-coating material consists of 8-35 wt. % magnesium oxide MgO or calcium oxide CaO, 2-10 wt. % of beryllium oxide BeO and 55-90 wt. % of aluminum oxide Al.sub.2 O.sub.3, zirconium dioxide ZrO.sub.2, silicon dioxide SiO.sub.2, chromic oxide Cr.sub.2 O.sub.3 and titanium dioxide TiO.sub.2. The spray-coating material of the invention can be employed to advantage, for example, in the chemical industry and in metallurgy.
    Type: Grant
    Filed: June 3, 1983
    Date of Patent: January 8, 1985
    Assignee: Ceskoslovenska akademie ved
    Inventors: Karel Zverina, Petr Kroupa
  • Patent number: 4489186
    Abstract: A polyphenylene ether resin composition comprising(1) a polyphenylene ether resin,(2) an oxanilide represented by the following formula ##STR1## wherein R.sup.1 and R.sup.6 are identical or different and each represents a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, or an alkoxy group having 1 to 15 carbon atoms, R.sup.2 and R.sup.7 are identical or different and each represents a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, or an alkoxy group having 1 to 10 carbon atoms, R.sup.3 and R.sup.8 are identical or different and each represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms, and R.sup.4 and R.sup.5 are identical or different and each represents a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, or a dialkylaminoalkyl group with the alkyl moiety having 1 to 6 carbon atoms,(3) an organic phosphite, and(4) a hindered phenolic antioxidant.
    Type: Grant
    Filed: July 5, 1983
    Date of Patent: December 18, 1984
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Akitoshi Sugio, Masanobu Masu, Masao Okabe, Eiji Ukita
  • Patent number: 4481321
    Abstract: Enol ethers corresponding to the following general formula ##STR1## are suitable as non-discoloring ozone protective agents for rubber.
    Type: Grant
    Filed: July 22, 1983
    Date of Patent: November 6, 1984
    Assignee: Bayer Aktiengesellschaft
    Inventors: Dieter W. Bruck, Werner Jeblick, Lothar Ruetz
  • Patent number: 4477629
    Abstract: New compositions of matter are disclosed which comprise (1) a cyanate-containing polymer or mixture thereof and optionally (2) a polycyanate or mixture thereof and/or (3) an epoxy resin. These compositions are thermosettable upon heating in the presence of suitable curing agents or catalysts.
    Type: Grant
    Filed: July 27, 1983
    Date of Patent: October 16, 1984
    Assignee: The Dow Chemical Company
    Inventor: Robert E. Hefner, Jr.
  • Patent number: 4474917
    Abstract: Phenolic-phosphite antioxidants for use alone in polyolefins or in admixture with synergists, phenolic/phosphite antioxidants, and the like. The adduct formed by reacting a phosphorus trihalide, preferably PCl.sub.3, with 1,3,5-trimethyl-2,4,6-tris(3',5'-di-tert-butyl-4'-hydroxybenzyl)benzene, e.g., is useful for antioxidant activity in organic materials. Various other phenolic adducts also show antioxidant activity. The adducts are formed by reacting PCl.sub.3, e.g., with a large phenolic compound having three or more phenolic moieties. The adducts contain components which are noncyclic with respect to phosphite moieties.
    Type: Grant
    Filed: May 27, 1982
    Date of Patent: October 2, 1984
    Assignee: Ethyl Corporation
    Inventor: Lester P. J. Burton
  • Patent number: 4464501
    Abstract: Flameproofed thermoplastic synthetic resins, elastomeric synthetic resins, rubber-type synthetic resins, thermosetting synthetic resins, and elastomers have both halogen- and antimony-containing flameproofing components, the latter having the formula Sb.sub.4 O.sub.5 X.sub.y, wherein X is chlorine, bromine, or sulfate and y is 2 or 1.
    Type: Grant
    Filed: August 27, 1981
    Date of Patent: August 7, 1984
    Assignee: Chemische Fabrik Kalk GmbH
    Inventors: Rainer Taubert, Utto Kerscher
  • Patent number: 4464497
    Abstract: A flame retarded black thermally and hydrolytically stabilized copolyester carbonate having reasonable melt stability is achieved with a relatively low surface area carbon black.
    Type: Grant
    Filed: December 15, 1982
    Date of Patent: August 7, 1984
    Assignee: General Electric Company
    Inventor: Edward L. Belfoure
  • Patent number: 4459395
    Abstract: The invention relates to a novel piperidine compounds which act as light stabilizers, heat stabilizers and oxidation stabilizers for synthetic polymers and have the general formula ##STR1## in which R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7, A, B, X, Y, a and b are as defined in the specification.The compounds are particularly useful as light stabilizers for polyolefines in the form of fibres or film.
    Type: Grant
    Filed: March 14, 1983
    Date of Patent: July 10, 1984
    Assignee: Chimosa Chimica Organica S.p.A.
    Inventor: Giuseppe Cantatore
  • Patent number: 4456720
    Abstract: There is provided a novel flame retardant system or additive which when incorporated in a polymer, such as polyphenylene ether resin compositons, produces novel flame resistant non-discolored polyphenylene ether resin compositions. The flame retardant system comprises a composition of stable halogenated organic compounds and boron containing salts or esters which are stable at 250.degree.-300.degree. C.
    Type: Grant
    Filed: August 29, 1983
    Date of Patent: June 26, 1984
    Assignee: General Electric Company
    Inventors: Visvaldis Abolins, Fred F. Holub
  • Patent number: 4446266
    Abstract: The invention relates to the use of N,N'-bis-salicyloyl hydrazine as a metal deactivator for organic materials which are in contact with copper or contain copper or copper ions, and has the object of providing an N,N'-bis-salicyloyl hydrazine which allows processing without danger on an industrial scale. For this purpose, the invention provides an N,N'-bis-salicyloyl hydrazine which is prepared from salicylic-acid alkyl ester and either hydrazine or salicylic-acid hydrazide. N,N'-bis-salicyloyl hydrazine prepared in this manner serves particularly as a metal deactivator in cable and wire insulation for power and communications engineering.
    Type: Grant
    Filed: July 29, 1980
    Date of Patent: May 1, 1984
    Assignee: Siemens Aktiengesellschaft
    Inventors: Wolfgang von Gentzkow, Roland Rubner
  • Patent number: 4434122
    Abstract: The heat stability of arylene sulfide resins, such as poly(p-phenylene sulfide) resin, is improved by the addition of cure retarders comprising phenolic amide or ester-based antioxidants. The resin compositions of the invention are particularly applicable for reducing gel formation during melt extrusion.
    Type: Grant
    Filed: May 11, 1982
    Date of Patent: February 28, 1984
    Assignee: Phillips Petroleum Company
    Inventors: Jerry O. Reed, Ronald D. Mathis
  • Patent number: 4425457
    Abstract: Polyethylene terephthalate resin compositions are provided containing fillers; reinforcing agents; or blends of such fillers and agents and selected alkali metal salts having anions which are oxides of Group IV of the periodic table preferably carbonates and bicarbonates.Articles molded from these compositions have high gloss surfaces and heat deflection temperatures when molded at temperatures below 110.degree. C. even without a precompounding drying stage.
    Type: Grant
    Filed: September 28, 1981
    Date of Patent: January 10, 1984
    Assignee: Celanese Corporation
    Inventors: John Christiansen, Shau-zou Lu
  • Patent number: 4424294
    Abstract: Injection moldable amide-imide homopolymers and copolymers containing titanates. These amide-imides are useful in engineering plastic applications.
    Type: Grant
    Filed: March 31, 1983
    Date of Patent: January 3, 1984
    Assignee: Standard Oil Company, (Indiana)
    Inventor: Wassily Poppe
  • Patent number: 4418169
    Abstract: Polyvinyl chloride polymers are made more heat degradation resistant by the incorporation of a diorganotin salt of an unsaturated aliphatic dicarboxylic acid ester and a hindered phenolic antioxidant.
    Type: Grant
    Filed: September 4, 1962
    Date of Patent: November 29, 1983
    Assignee: M & T Chemicals Inc.
    Inventors: Ambrose J. Gibbons, Jr., Robert C. Ringwood, Jr.
  • Patent number: 4417011
    Abstract: A resin composition for bonding of foundry sand, said composition comprising as a resin component a crystalline unsaturated polyester being solid and substantially tack-free at room temperature and having an acid value of 15 to 100, said unsaturated polyester being prepared by polymerizing (A) a dicarboxylic acid component containing 10 to 50 mole % of terephthalic acid, an alkyl terephthalate, isophthalic acid or an alkyl isophthalate and 50 to 90 mole % of fumaric acid and (B) a glycol component containing at least 90 mole % of ethylene glycol, trimethylene glycol, neopentyl glycol, hydrogenated bisphenol A or 2,2-d-(4-hydroxypropoxyphenyl)propane.
    Type: Grant
    Filed: April 1, 1983
    Date of Patent: November 22, 1983
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Koue Ohkawa, Shin Fujii, Takashi Seino
  • Patent number: 4412897
    Abstract: The process concerns stabilization of polymers against ionizing radiation where the polymer molecule contains a halogen. It comprises incorporating hydroquinone into the polymer, especially into polyvinyl chloride, the polymer containing both a metallic compound, heat stabilizer, and also a mercaptan.
    Type: Grant
    Filed: October 9, 1981
    Date of Patent: November 1, 1983
    Assignee: Ato Chimie
    Inventors: Simon Kornbaum, Jean-Yves Chenard
  • Patent number: 4413081
    Abstract: The heat stability of arylene sulfide polymers, such as poly(p-phenylene sulfide), is improved by the addition of cure retarders comprising Group 8 metal dihydrocarbyldithiocarbamates.
    Type: Grant
    Filed: February 1, 1983
    Date of Patent: November 1, 1983
    Assignee: Phillips Petroleum Company
    Inventors: Ronald D. Mathis, Jerry O. Reed