Patents Examined by H. S. Cockeram
  • Binders for polydiene composite propellants
    Patent number: 4377678
    Abstract: The present invention is a binder for a polydiene composite propellant comprising a small amount of binder and has as its object the production of the binder, which can provide stable physical properties between production lots and has a long pot life, and consists mainly of a polymer which has a predetermined molecular weight between crosslinks and which is obtained by reacting a combination of a polydiene glycol having a hydroxyl group number of 1.8-2.1 and a number average molecular weight of 1,000-5,000, a trifunctional crosslinking agent, a diisocyanate and a bifunctional chain extender. When a diene polymer having a functional group number of not more than 1 is additionally added to the above described combination, the elongation of the binder is improved and the use of a plasticizer can be reduced or eliminated.
    Type: Grant
    Filed: June 4, 1980
    Date of Patent: March 22, 1983
    Assignees: Nissan Motor Company, Ltd., Japan Synthetic Rubber Co., Ltd.
    Inventors: Daizo Fukuma, Shigeru Suzuki, Kensho Shirota, Kunihiro Harada
  • Photocurable compositions based on acrylate polyester urethanes
    Patent number: 4377679
    Abstract: Provided are processes for preparing compositions useful in photopolymerizable compositions, which processes comprise:A. reacting a polyether diol and an acrylic acid in about equal molar proportions; andB.1. reacting a polyether diol and an acrylic acid in about equal molar proportions and2. reacting the product of step B1, a hydroxyalkylacrylate and an organic diisocyanate in about equal molar proportions.Also provided are the products of these processes. These products are useful in photopolymerizable compositions which may typically contain, in addition to said products, N-vinyl-2-pyrrolidone and a photoinitiator.
    Type: Grant
    Filed: January 28, 1982
    Date of Patent: March 22, 1983
    Assignee: Thiokol Corporation
    Inventor: Claude J. Schmidle
  • Sulfur-modified copolyether glycols, a method for preparing them, and polyurethanes prepared therefrom
    Patent number: 4374970
    Abstract: Copolyether glycols are modified so that they contain 1-25%, by weight of .beta.,.beta.'-dihydroxyalkyl sulfide moieties.These modified copolyether glycols have enhanced resistance to degradation by heat and oxygen.The invention also relates to a method of making the modified copolyether glycols, to their use as stabilizers against the degradation of the polyether chains, and to polyurethanes made with them.
    Type: Grant
    Filed: July 7, 1981
    Date of Patent: February 22, 1983
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Ivan M. Robinson
  • Process for the preparation of flexible polyurethane foams employing polyester-polyether polyol mixtures
    Patent number: 4374935
    Abstract: The invention concerns a process for the preparation of flexible polyurethane foams having good hydrolytic stability, improved damping, with equal or higher levels of other physical properties and with a high absorption capacity. The foams are prepared by reacting organic polyisocyanates and mixtures of(a) liquid polyester polyols, which are produced by the polycondensation of organic dicarboxcylic acid and a polyol mixture which contains 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, and at least one triol, and(b) di- to tetra-functional polyether polyols having molecular weights of 1500 to 6000in the presence of catalysts and blowing agents as well as optionally chain extenders, auxiliaries, and additives.
    Type: Grant
    Filed: January 4, 1982
    Date of Patent: February 22, 1983
    Assignee: BASF Aktiengesellschaft
    Inventors: Walter Decker, Ernst Schoen, Herbert Grabhoefer, Peter Weyland
  • Semi-flexible foam polymer used in packaging
    Patent number: 4374934
    Abstract: A select, low density semi-flexible foam polymer composition is prepared from a very select reaction mixture which is characterized by a foaming agent which consists essentially of water and is substantially free of fluorinated hydrocarbon compounds, and a relatively low reaction mixture NCO/OH index of from about 20 to about 70. The foam polymer composition is particularly useful in packaging fragile or shock-sensitive objects.
    Type: Grant
    Filed: March 30, 1981
    Date of Patent: February 22, 1983
    Assignee: Olin Corporation
    Inventor: Robert J. Raynor
  • Silane-containing isocyanate-terminated polyurethane polymers
    Patent number: 4374237
    Abstract: Curable isocyanate prepolymers have been made in which all or a portion of the available isocyanate terminal groups have been reacted with a secondary amine-containing silane monomer having two trialkoxy silane groups.
    Type: Grant
    Filed: December 21, 1981
    Date of Patent: February 15, 1983
    Assignee: Union Carbide Corporation
    Inventors: Mitchell H. Berger, Walter P. Mayer, Robert J. Ward
  • Process of making urethane rheology modifiers
    Patent number: 4373083
    Abstract: Rheology modifiers useful in water and organic solvent-based compositions are derived from the reaction of polyalkylene oxide, polyfunctional material, diisocyanate, water and end-capping compounds in an organic solvent. The organic solvent is compatible with latex coating compositions.
    Type: Grant
    Filed: December 29, 1980
    Date of Patent: February 8, 1983
    Assignee: PPG Industries, Inc.
    Inventors: Jerome A. Seiner, Karl F. Schimmel
  • Rubber compositions containing silica and tackifier resins
    Patent number: 4373041
    Abstract: Tackifying resins, such as rosin esters, hydrogenated rosin esters, and terpene resins, are used as promoters for silica-filled rubber compositions to improve the physical properties, such as tensile, hysteresis, etc., of the rubber.
    Type: Grant
    Filed: October 29, 1981
    Date of Patent: February 8, 1983
    Assignee: Phillips Petroleum Company
    Inventors: Jerold D. Wood, Carl J. Stacy
  • Sulfur-modified polypropylene ether glycols, a method for preparing them, and polyurethanes prepared therefrom
    Patent number: 4373084
    Abstract: Polypropylene ether glycol is modified so that it contains 1-25%, by weight of .beta.,.beta.'-dihydroxyalkyl sulfide moieties.These modified polypropylene ether glycols have enhanced resistance to degradation by heat and oxygen.The invention also relates to a method of making the modified PPG's, to their use as stabilizers against the degradation of the polyether chain, and to polyurethanes made with them.
    Type: Grant
    Filed: July 7, 1981
    Date of Patent: February 8, 1983
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Ivan M. Robinson
  • Process for making curable adhesive polyurethane products
    Patent number: 4373057
    Abstract: This invention is directed to a polyurethane product produced by a one step process, in the absence of a polymerization catalyst, with reactants, and additives, if any, being initially intermingled in the ambient room temperature range and reacted with intermingling in the absence of externally added heat. The reactants are (1) aliphatic, aromatic, or cycloaliphatic having at least two isocyanate groups and (2) diol/polyol compounds having at least two sterically unhindered hydroxyl groups. The product is a liquid, homogeneous adhesive material characterized by a natural absence of polymerization catalyst residue and capable of being cured because of the presence of unreacted isocyanate groups, the isocyanate reactant being charged in excess of the stoichiometric requirement of the diol/polyol reactant.
    Type: Grant
    Filed: September 14, 1981
    Date of Patent: February 8, 1983
    Assignee: Colamco, Inc.
    Inventor: James A. Hammond
  • Coating compositions and process for the production of polyurethane coatings
    Patent number: 4373081
    Abstract: The present invention relates to thermally cross-linkable coating compositions which are liquid and stable in storage at room temperature and which contain combinations of dialkyl-malonate-blocked polyisocyanates and organic polyhydroxyl compounds as binders and, optionally, auxiliaries and additives, being characterized in that the binder comprises:(a) a polyisocyanate component containing dialkyl-malonate-blocked isocyanate groups and a content of blocked isocyanate groups, expressed as NCO, based on the weight of the polyisocyanate component excluding the weight of the blocking agent, of from about 3 to 33.
    Type: Grant
    Filed: November 27, 1981
    Date of Patent: February 8, 1983
    Assignee: Bayer Aktiengesellschaft
    Inventors: Klaus Nachtkamp, Manfred Bock, Gerhard Mennicken, Josef Pedain
  • Modification of polyols with epoxy resins for use in flexible polyurethane foams
    Patent number: 4373034
    Abstract: The modification of polyether polyols by their reaction with epoxy resin and alkylene oxides is described. The modified polyols of 2000 to 7000 molecular weight produce flexible polyurethane foams that have higher load bearing properties than foams made with nonmodified polyols. The ability of a modified polyol to make a higher load bearing foam is related to the position in the polyol chain the epoxy resin is added.
    Type: Grant
    Filed: July 27, 1981
    Date of Patent: February 8, 1983
    Assignee: Texaco Inc.
    Inventors: George P. Speranza, Michael Cuscurida, Robert L. Zimmerman
  • Curative for a two component isocyanate adhesive and said adhesive
    Patent number: 4373082
    Abstract: A curative for a two component isocyanate or polyurethane adhesive composed of a prepolymer component having about 3 to 15 percent free isocyanate, said curative comprising at least one polyol of about 400 to 6000 molecular weight and a polyamine with at least part of said polyol and said diamine being reacted with an organic polyisocyanate to form micelles that exhibit upon NMR examination strong urea peaks and weak urethane peaks. The curative is useful to make an adhesive that is particularly useful for adhering to metals and polyesters.
    Type: Grant
    Filed: November 16, 1981
    Date of Patent: February 8, 1983
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: Michael E. Kimball, Marvin T. Randleman
  • Antithrombogenic, highly elastic polyurethane compound
    Patent number: 4371686
    Abstract: An antithrombogenic, highly elastic polyurethane compound produced by the reaction of a polyether diol with a diisocyanate and a diamine, which polyurethane compound is characterized by said polyether diol being a compound of the general formula: ##STR1## wherein, a, b, and c each denote a positive integer and having a polyoxyethlene content in the range of from 10 to 50 weight percent and an average molecular weight in the range of from 500 to 5,000.
    Type: Grant
    Filed: September 14, 1981
    Date of Patent: February 1, 1983
    Assignee: Agency of Industrial Science & Technology Ministry of International Trade & Industry
    Inventors: Noboru Yamamoto, Iwao Yamashita
  • Sulfur-modified polytetramethylene ether glycols, a method for preparing them, and polyurethanes prepared therefrom
    Patent number: 4371687
    Abstract: Polytetramethylene ether glycol is modified so that it contains 1-25%, by weight of .beta.,.beta.'-dihydroxyalkyl sulfide moieties.These modified polytetramethylene ether glycols have enhanced resistance to degradation by heat and oxygen.The invention also relates to a method of making the modified PTMEG's, to their use as stabilizers against the degradation of the polyether chain, and to polyurethanes made with them.
    Type: Grant
    Filed: July 7, 1981
    Date of Patent: February 1, 1983
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Ivan M. Robinson
  • Solution of a polyurethane in a polyol and a process for using such a solution in the production of polyurethane plastics
    Patent number: 4371630
    Abstract: A solution of a polyurethane in a polyol is made from (a) the reaction product of a polyisocyanate and a diprimary diol, and (b) a polyether in which the reaction product constitutes from 3 to 60 wt. % of the solution. Suitable diprimary diols have a molecular weight of from 90 to 800 and a structure at both hydroxyl groups corresponding to the general formula: ##STR1## in which R.sub.1 represents chlorine, an alkyl, cycloalkyl, aralkyl or aryl radical having from 1 to 10 carbon atoms, which carbon atoms may be substituted or interrupted by chlorine, ester groups, ether groups, amide groups, urethane groups or nitrile groups, andR.sub.2 represents hydrogen or a radical within the definition of R.sub.1.Polyethers which may be employed have at least two hydroxyl groups (at least 80% of which are secondary hydroxyl groups) and an average molecular weight of from 500 to 12,000.
    Type: Grant
    Filed: February 23, 1981
    Date of Patent: February 1, 1983
    Assignee: Bayer Aktiengesellschaft
    Inventors: Klaus Konig, Hans-Walter Illger, Peter Seifert, Holger Meyborg
  • High strength diene/monovinyl aromatic copolymer-based adhesives
    Patent number: 4370433
    Abstract: A highly branched copolymer particularly suitable for forming pressure sensitive adhesives prepared in the presence of specified amounts of tert-butylchloride. Conjugated diene monomers are copolymerized with monovinylaromatic monomers in the presence of an organolithium initiator and a suitable amount of tertiary butylchloride. The holding power of adhesives prepared thereby is greatly increased.
    Type: Grant
    Filed: July 10, 1981
    Date of Patent: January 25, 1983
    Assignee: Phillips Petroleum Company
    Inventors: George M. Allison, III, Mason S. Wilt
  • Process for no-bake foundry application utilizing polyurethanes based on amine polyols
    Patent number: 4370463
    Abstract: No Bake foundry cores and molds for casting metals are prepared by using a binder comprising a polyol generally derived from alkoxylating an amine compound and a polyisocyanate. The binder is especially useful for casting non-ferrous metals, for example, the casting of aluminum, magnesium and other light weight metals. The cores and molds produced for casting aluminum and other light weight metals exhibit excellent shakeout while retaining other desirable core and mold properties. In addition the binders of this invention would have been observed to have an autocatalytic nature.
    Type: Grant
    Filed: March 30, 1981
    Date of Patent: January 25, 1983
    Assignee: Ashland Oil, Inc.
    Inventor: Robert J. Schafer
  • Lacquer polyisocyanates, process for the production thereof and use thereof as isocyanate component in thermosetting two-component polyurethane lacquers
    Patent number: 4369301
    Abstract: The present invention relates to lacquer polyisocyanates which contain about 0 to 8% free isocyanate groups, about 10 to 28% blocked isocyanate groups and about 2 to 10% of the structural units, --NH--NH--CO--O, all percentages based on the weight of the polyisocyanates, but excluding the weight of the blocking agent. Also provided is a process for preparing these polyisocyanates which comprises reacting about 10 to 30 mol % of the isocyanate groups of an organic polyisocyanate with reaction products which have (i) alcoholic hydroxyl groups and (ii) structural units of the formula, --O--CO--NH--NH--CO--O--, and/or of the formula H.sub.2 N--NH--CO--O--, with the formation of urethane groups and optionally groups corresponding to the formula, --NH--NH--CO--O--, and reacting about 50 to 90 mol % of the isocyanate groups of the organic polyisocyanate with a blocking agent.
    Type: Grant
    Filed: October 16, 1981
    Date of Patent: January 18, 1983
    Assignee: Bayer Aktiengesellschaft
    Inventors: Eberhard Konig, Josef Pedain, Hans J. Kreuder
  • Permanent fluxing agent and solder-through conformal coating
    Patent number: 4369287
    Abstract: An ethylene-acrylic acid copolymer can be used as a flux or a solder-through conformal coating. The copolymer can be melted and used as a coating or core for solder, or applied directly to a component, or made into a thixotropic gel with mineral spirits and/or alcohol, then applied as a coating to a component or assembly. Terpenes may be added as tackifiers in some applications. Whether used as a flux or simply solder-through coating, the material provides a self-healing moisture barrier which can safely remain on the component.
    Type: Grant
    Filed: March 16, 1981
    Date of Patent: January 18, 1983
    Assignee: Motorola Inc.
    Inventors: Wendell R. Hutchinson, John D. Shurboff