From Two Or More Polyols Patents (Class 525/173)
  • Patent number: 4739012
    Abstract: Blends of 5 to 97.5% of a segmented thermoplastic copolyester such as polybutylene terephthalate containing polybutane glycol segments with 95 to 20% of a blend of an ethylene copolymer and 5 to 75% either polyvinyl chloride or polyvinylidene chloride. The polyethylene copolymer is an elastomeric blend of polyvinyl chloride or polyvinylidene chloride with a copolymer of ethylene and esters of ethylenically unsaturated acids, vinyl esters, vinyl alkyl ethers, vinyl chloride, vinylidene chloride acrylonitrile, methacrylonitrile, norbornene, alpha-olefins of 3-12 carbon atoms and optionally ethylenically unsaturated carboxylic acids, carbon monoxide and sulfur dioxide. The blends are processable temperatures lower than either component they are prepared from.
    Type: Grant
    Filed: January 21, 1987
    Date of Patent: April 19, 1988
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: John F. Hagman
  • Patent number: 4725651
    Abstract: A polymeric blend composition comprising a vinylidene chloride interpolymer and a thermoplastic copolyester resin, said polymers being miscible. The vinylidene chloride interpolymer is present in an amount of from about 1 to about 80 weight percent based on total polymeric blend composition weight. The thermoplastic copolyester resin is present in an amount of from 20 to about 99 weight percent based on total polymeric blend composition weight. The blends exhibit physical properties superior to those expected by the rule of mixtures.
    Type: Grant
    Filed: December 17, 1985
    Date of Patent: February 16, 1988
    Assignee: The Dow Chemical Company
    Inventor: Dan E. Ranck
  • Patent number: 4725647
    Abstract: Described herein is a process for preparing polyesters which comprises reacting a dihydric phenol with a diester derivative of an aromatic diacid in the presence of from about 10 to about 60 weight percent of a processing aid having a boiling point of greater than about 200.degree. C., under polyester forming conditions.
    Type: Grant
    Filed: November 8, 1984
    Date of Patent: February 16, 1988
    Assignee: Amoco Corporation
    Inventors: Louis M. Maresca, Markus Matzner
  • Patent number: 4720524
    Abstract: An adhesive resin composition is described, comprising: (A) a thermoplastic copolyester resin prepared from (1) a dicarboxylic acid component comprising from 40 to 100 mol % of terephthalic acid and from 0 to 60 mol % of other aromatic dicarboxylic acid and (2) a low molecular weight glycol component comprising from 40 to 100 mol % of 1,4-butanediol and from 0 to 60 mol % of diethylene glycol or 1,6-hexanediol and further from 0 to 10 mol %, based on the total carboxylic acid, of polytetramethylene glycol having a molecular weight of from 600 to 6,000, which has a melting point of from 90.degree. to 160.degree. C. and a reduced viscosity of at least 0.5; and (B) an ethylene copolymer having at least one functional group selected from an epoxy group, a carboxylic acid group, and a dicarboxylic anhydride gruop; and if desired, (C) a thermoplastic resin other than the resin (A), and if further desired, (D) a polyfunctional epoxy compound.
    Type: Grant
    Filed: August 27, 1986
    Date of Patent: January 19, 1988
    Assignees: Sumitomo Chemical Company, Ltd., Toyobo Co., Ltd
    Inventors: Tadayuki Ohmae, Mitsuyuki Okada, Hiroshi Nagai, Yutaka Mizumura
  • Patent number: 4708985
    Abstract: The invention relates to a hydrophilic moulding compound of homopolyester and/or copolyester which contains 1 to 20 percent by weight of an alkaline and/or alkaline-earth salt of salt-forming polymer and/or copolymers from ethylenic unsaturated monomers as finely dispersed filling material, having in particualr a maximum particle size of 1 um, the salt-forming polymers being composed in particular of the following single monomers or mixtures thereof: vinyl-sulfonic acid, acrylamidoalkylene-sulfonic acid, sulfonated styrene, acrylic acid, methacrylic acid, maleic acid, fumaric acid, itaconic acid, crotonic acid, vinyl-phosphonic acid, monoalkyl ester of maleic acid, monoalkyl ester of fumaric acid.The invention also relates to a process according to which the salts are preferably added to the polycondensation mixture of the polyester starting materials before and/or during poly-condensation as a suspension in polyhydric alcohol.
    Type: Grant
    Filed: March 22, 1982
    Date of Patent: November 24, 1987
    Assignee: Akzona Incorporated
    Inventors: Michael Diamantoglou, Helmut Magerlein, Walter Brodowski, Wolfgang Grimm, Gerhard Meyer
  • Patent number: 4707506
    Abstract: Flame retardant polyesterether elastomer compositions having superior high temperature processability and heat aging properties, resistance to blooming, improved flame retardance, and reduced smoke generation and reduced dripping during burning, comprise(a) a copolyesterether elastomer prepared from dimethyl terephthalate, polyether glycol and 1,4-butanediol;(b) a chlorinated bisimide of the formula: ##STR1## (c) antimony trioxide; and (d) polytetrafluoroethylene.
    Type: Grant
    Filed: December 11, 1985
    Date of Patent: November 17, 1987
    Assignee: Occidental Chemical Corporation
    Inventor: Ronald L. Markezich
  • Patent number: 4652608
    Abstract: Polyarylate polymers derived from (A) substituted phenolphthalein compounds or mixtures of these compounds with other bisphenols, and (B) a mixture of isophthalic and terephthalic acid. Also disclosed are polyarylate alloy compositions comprising a phenolphthalein polyarylate and a polymer resin selected from polybisphenol A carbonate and polystyrene.
    Type: Grant
    Filed: December 28, 1984
    Date of Patent: March 24, 1987
    Assignee: Chevron Research Company
    Inventor: Phillip H. Parker
  • Patent number: 4629761
    Abstract: A thermoplastic composition comprising about 10-80 parts by weight total polymers of a multi-block copolyester elastomer having a melting point of from about 100.degree.-200.degree. C. and about 20-90 parts by weight total polymers of a crosslinked chlorosulfonated polyethylene elastomer dispersed in said copolyester elastomer, said chlorosulfonated polyethylene elastomer being crosslinked to an extent such that not more than about 45% by weight of said elastomer is extractable with toluene at 25.degree.0 C.
    Type: Grant
    Filed: May 8, 1985
    Date of Patent: December 16, 1986
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: James R. Wolfe, Jr.
  • Patent number: 4584335
    Abstract: Polyarylate polymers derived from (A) mixtures of 5-keto-bis(hydroxyphenyl)anthracene compounds with other bisphenols and (B) a mixture of isophthalic and terephthalic acid. Also disclosed are polyarylate alloy compositions comprising a 5-keto-bis(hydroxyphenyl)anthracene polyarylate and a polymer resin selected from polybisphenol A carbonate and polystyrene.
    Type: Grant
    Filed: December 28, 1984
    Date of Patent: April 22, 1986
    Assignee: Chevron Research Company
    Inventor: Phillip H. Parker
  • Patent number: 4582876
    Abstract: Molding compositions having high impact at low temperatures and which are blends of copolyesters based on poly(1,4-cyclohexylenedimethylene terephthalate) and rubber-modified styrene-maleic anhydride copolymers having at least two rubbery additives that were present during the polymerization of the copolymers.
    Type: Grant
    Filed: September 10, 1984
    Date of Patent: April 15, 1986
    Assignee: Eastman Kodak Company
    Inventors: Doyle A. Weemes, Robert W. Seymour
  • Patent number: 4569772
    Abstract: Polyethylene terephthalate-polyoxyethylene terephthalate soil release promoting polymers, which have been found to be subject to loss of soil release promoting properties on storage in contact with alkaline material, such as builder salts for synthetic organic detergents, are stabilized by melting them together with a water soluble polyacrylate and subsequently converting the melt to solid particles which contain the PET-POET polymer and polyacrylate in intimate contact. Preferably the melt is at a temperature above 70.degree. C., such as within the range of 70.degree. to 150.degree. C., the melt is solidified by cooling and the solid product resulting is cryogenically size reduced to desired particle size and flake shape, preferably such as will pass through a No. 10 sieve, U.S. Sieve Series.
    Type: Grant
    Filed: September 4, 1984
    Date of Patent: February 11, 1986
    Assignee: Colgate-Palmolive
    Inventor: Loretta K. Ciallella
  • Patent number: 4520168
    Abstract: Color improved polyarylates having a reduced viscosity of from about 0.1 to greater than 1.0 dl/gm produced by a process comprising the following steps:(a) reacting an acid anhydride derived from an acid containing from 2 to 8 carbon atoms with at least one dihydric phenol to form the corresponding diester; and(b) reacting said diester with at least one aromatic dicarboxylic acid at a temperature sufficient to form the polyarylate, wherein the improvement comprises carrying out said process in the presence of a particular solid adsorbent.
    Type: Grant
    Filed: March 27, 1984
    Date of Patent: May 28, 1985
    Assignee: Union Carbide Corporation
    Inventors: James H. Kawakami, Benito See, Thomas R. Jones, Louis M. Maresca
  • Patent number: 4500679
    Abstract: Molding compositions are prepared from blends of (A) a thermoplastic copolyetherester elastomer; (B) a styrene maleic anhydride polymer; and (C) an ABS or MBS polymer. Component B, the styrene maleic anhydride polymer may optionally contain a termonomer such as methylmethacrylate or acrylonitrile and a rubber component.
    Type: Grant
    Filed: August 9, 1982
    Date of Patent: February 19, 1985
    Assignee: Monsanto Company
    Inventor: Daniel L. DuFour
  • Patent number: 4478979
    Abstract: Thermoplastic molding compositions are disclosed which comprise an intimate admixture of (a) a copolymer of a vinyl aromatic compound and an .alpha.,.beta.-unsaturated cyclic anhydride, including rubber-modified copolymers thereof, and (b) impact modifiers comprising graft copolymers, copolyesters, and rubber-modified homopolymers. Optionally, the compositions can also include a polyphenylene ether resin and further, optionally, a normally liquid polybutadiene oligomer. Mixing (a) with a polyphenylene ether leads to a compatible composition, markedly improved in heat deflection temperature.
    Type: Grant
    Filed: June 24, 1983
    Date of Patent: October 23, 1984
    Assignee: General Electric Company
    Inventors: Visvaldis Abolins, John C. Goossens, Fred F. Holub, Gim F. Lee, Jr.
  • Patent number: 4460741
    Abstract: Molding compositions are prepared from blends of (A) a thermoplastic copolyetherester elastomer; (B) a styrene maleic anhydride polymer; (C) an ABS or MBS polymer; and (D) a nitrile rubber. Component B, the styrene maleic anhydride polymer may optionally contain a termonomer such as methyl-methacrylate or acrylonitrile and a rubber component.
    Type: Grant
    Filed: November 4, 1982
    Date of Patent: July 17, 1984
    Assignee: Monsanto Company
    Inventors: Daniel L. Dufour, James S. Holtrop
  • Patent number: 4442266
    Abstract: A process of melt spinning polypropylene the improvement comprising adding to the polypropylene before it is melt spun, a small proportion of a polymer capable of forming an anisotropic melt in the temperature range at which the polypropylene may be melt spun and then melt spinning the polymers together at a wind up speed of less than 1000 meters per minute whereby in the process there is a suppression of wind up speed compared with the process carried out in the absence of the added polymer.
    Type: Grant
    Filed: May 29, 1981
    Date of Patent: April 10, 1984
    Assignee: Imperial Chemical Industries Limited
    Inventor: Harry Brody
  • Patent number: 4439586
    Abstract: An improved process for preparing a polyarylate having a reduced viscosity of from about 0.1 to greater than 1.0 dl/gm comprising the following steps:(a) reacting an acid anhydride derived from an acid containing from 2 to 8 carbon atoms with at least one dihydric phenol to form the corresponding diester; and(b) reacting said diester with at least one aromatic dicarboxylic acid at a temperature sufficient to form the polyarylate, wherein the improvement comprises carrying out said process in the presence of a particular solid adsorbent.
    Type: Grant
    Filed: June 30, 1982
    Date of Patent: March 27, 1984
    Assignee: Union Carbide Corporation
    Inventors: James H. Kawakami, Benito See, Thomas R. Jones, Louis M. Maresca
  • Patent number: 4410687
    Abstract: A polyester resin has an oxyalkylene content of from about 40 percent to about 75 percent. The polyester resin is especially useful as a pigment dispersant in coating compositions. Such compositions can be formulated without the need for conventional low molecular weight dispersants and surfactants which oftentimes adversely affect the film properties of the applied compositions.
    Type: Grant
    Filed: November 29, 1982
    Date of Patent: October 18, 1983
    Assignee: PPG Industries, Inc.
    Inventors: Karl F. Schimmel, Michael A. Traficante, Rostyslaw Dowbenko
  • Patent number: 4397989
    Abstract: The high solids coating composition contains at least 40% by weight of a binder of film-forming constituents in which the constituents are of(1) an acrylic polymer of styrene or methyl methacrylate or mixtures thereof, an alkyl acrylate or an alkyl methacrylate and a hydroxyl alkyl acrylate or methacrylate(2) a polyester polyol and(3) an alkylated melamine formaldehyde crosslinking agent and optionally, an acid catalyst;the composition is particularly useful as a primer or an exterior finish for automobiles, trucks, airplanes and can be used as an appliance finish and for coil coatings.
    Type: Grant
    Filed: February 8, 1982
    Date of Patent: August 9, 1983
    Assignee: E. I. Du Pont de Nemours & Co.
    Inventor: Paul L. Adesko
  • Patent number: 4397986
    Abstract: Polyblends comprising polyethylene terephthalate, or a copolyester or blend thereof containing at least 80 percent by weight of polyethylene terephthalate, and a thermoplastic copolymer of (1) at least one vinyl aromatic monomer, (2) acrylic acid or methacrylic acid, or both, and (3) optionally at least one additional copolymerizable termonomer have useful properties, notably higher heat deflection temperatures than the corresponding unblended polyester.
    Type: Grant
    Filed: March 3, 1982
    Date of Patent: August 9, 1983
    Assignee: Ethyl Corporation
    Inventor: Edwin D. Hornbaker
  • Patent number: 4386186
    Abstract: Described herein is an improved process for preparing a polyarylate having a reduced viscosity of from about 0.1 to greater than 1.0 dl/gm which process comprises the following steps:(a) reacting an acid anhydride derived from an acid containing from 2 to 8 carbon atoms with at least one dihydric phenol to form the corresponding diester; and(b) reacting said diester with at least one aromatic dicarboxylic acid at a temperature sufficient to form the polyarylate, wherein the improvement comprises carrying out said process in the presence of at least one thermoplastic polymer. Also described herein are the products produced by said process.
    Type: Grant
    Filed: March 29, 1982
    Date of Patent: May 31, 1983
    Assignee: Union Carbide Corporation
    Inventors: Louis M. Maresca, Markus Matzner
  • Patent number: 4381356
    Abstract: Disclosed are plastic grade polypropylene compositions suitable for molding and extrusion, which contain an inert particulate filler material such as talc and a copolyester which greatly increases the heat stability of articles produced therefrom. The polypropylene is semi-crystalline, isotactic, having a density equal to or greater than 0.90. The copolyesters used in the composition of this invention are described as amorphous polyesters derived at least in part from terephthalic acid and diethylene glycol or 1,4-cyclohexanedimethanol.
    Type: Grant
    Filed: June 21, 1982
    Date of Patent: April 26, 1983
    Assignee: Eastman Kodak Company
    Inventor: Harold P. Marsh
  • Patent number: 4373047
    Abstract: Normally flammable polyester resins (a) are rendered flame-retardant with reduced blooming or plate out tendencies and without loss in toughness or other properties in combination with (b) a flame retardant amount of decabromodiphenyl ether and (c) a flame-retardant synergist compound, by including a small amount of (d) an olefin polymer and/or an olefin copolymer. The compositions, which are useful per se for molding, extrusion, and the like, are, in addition, described in impact modified resin compositions and filled and/or reinforced modifications.
    Type: Grant
    Filed: November 26, 1980
    Date of Patent: February 8, 1983
    Assignee: General Electric Company
    Inventors: Stuart C. Cohen, Ronald L. Dieck
  • Patent number: 4367316
    Abstract: A vulcanized molded article comprising a blend of about 5-90% by weight of a thermoplastic copolyester or block copolyester elastomer and about 95-10% by weight of a vulcanizable synthetic or natural rubber having an improved adhesive property with polyester fibers or fabrics.
    Type: Grant
    Filed: April 27, 1978
    Date of Patent: January 4, 1983
    Assignee: Toray Industries, Inc.
    Inventors: Chiaki Tanaka, Masanobu Morikawa, Yoshio Kohno
  • Patent number: 4338243
    Abstract: Use of a selected antimonate has been found to increase flame-retardancy without lowering thermal resistivity of a polyurethane terephthalate molding blend which contains an ionic hydrocarbon copolymer or ionic salt of a hydrocarbon acid and a low molecular weight compound.
    Type: Grant
    Filed: May 7, 1980
    Date of Patent: July 6, 1982
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: James L. Hecht, Paul C. Yates
  • Patent number: 4331782
    Abstract: The present invention is an improvement in a method for making a phenol-functional polyester polymer wherein a hydroxybenzoic acid, a polyol, and a dicarboxylic acid are subjected to a polyesterification reaction under polyesterification conditions to make said polymer. The improvement comprises conducting the reaction in two stages, the first stage comprising the formation of an ester-alcohol adduct between said hydroxybenzoic acid and an epoxy compound wherein the ratio of carboxyl groups from said hydroxybenzoic acid to said oxirane groups of said epoxy compound is about 1:1. The second stage of the improvement comprises conducting the polyesterification reaction with said adduct.
    Type: Grant
    Filed: March 5, 1981
    Date of Patent: May 25, 1982
    Assignee: Ashland Oil, Inc.
    Inventor: Gary L. Linden
  • Patent number: 4320045
    Abstract: A resin molding composition comprising a thermoplastic polymer, a monomer and an unsaturated polyester which is the reaction product of at least one polyol having at least two, but not more than four hydroxyl groups, the polyols comprising not less than about 48% of the weight of the reactants forming the polyester.
    Type: Grant
    Filed: April 10, 1981
    Date of Patent: March 16, 1982
    Assignee: Owens-Corning Fiberglas Corporation
    Inventor: Gwilym Owen
  • Patent number: 4317764
    Abstract: A polybutylene terephthalate homopolymer or copolymer molding blend having good impact resistance is obtained by incorporating into the resin a selected organic compound and an ethylene polymer.
    Type: Grant
    Filed: April 10, 1981
    Date of Patent: March 2, 1982
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: M. Lana Sheer
  • Patent number: 4299934
    Abstract: Hot melt adhesive compositions having low melt viscosity and high adhesive strength are disclosed. The compositions include polyesters comprising 1,6-hexanediol and terephthalic acid, blended with a polymeric material comprising a vinyl aromatic polymer derived from a monomer of the formula ##STR1## wherein R is hydrogen or an alkyl group containing 1 to 4 carbon atoms and R.sub.1 is hydrogen, chlorine, alkyl from 1 to 4 carbon atoms or phenyl.
    Type: Grant
    Filed: October 2, 1980
    Date of Patent: November 10, 1981
    Assignee: Eastman Kodak Company
    Inventors: Frederick D. Petke, Richard L. McConnell
  • Patent number: 4290927
    Abstract: An intimate polyblend of about 5-90% by weight of a thermoplastic copolyester or block copolyester elastomer and about 95-10% by weight of a vulcanizable synthetic or natural rubber. The preferred copolyester is a copolyester of polybutylene terephthalate and the prefered block copolyetherester is polybutylene terophthalate-poly (tetramethylene oxide) glycol block copolyester. These polyblends can be vulcanized to elastomeric molded articles which exhibit an excellent oil and oxygen/ozone resistance even at elevated temperatures, a high impact strength, an increased scuff resistance and an improved flexibility at low and high temperatures. The vulcanized molded articles also have an improved adhesive property with polyester fibers or fabrics.
    Type: Grant
    Filed: April 16, 1980
    Date of Patent: September 22, 1981
    Assignee: Toray Industries, Inc.
    Inventors: Chiaki Tanaka, Masanobu Morikawa, Yoshio Kohno
  • Patent number: 4275180
    Abstract: The invention provides a polymer composition which comprises a crosslinkable or crosslinked blend of an elastomer and a thermoplastic polymer, the elastomer comprising a polymer of ethylene with an ethylenically unsaturated aliphatic ester, and the elastomer and the thermoplastic polymer being substantially free of halogen-containing substituents. The preferred compositions may be used as jacketing materials for wire and cable, as harnessing materials, and in the manufacture of heat recoverable articles having improved oil resistance and thermal ageing properties.
    Type: Grant
    Filed: April 7, 1978
    Date of Patent: June 23, 1981
    Assignee: Raychem Limited
    Inventor: Raymond Clarke
  • Patent number: 4268570
    Abstract: Metal-coated plastic product which comprises a molded product of a mixture of 95 to 20% by weight of a polyester block copolymer and 5 to 80% by weight of a copolymer comprising an acrylic monomer, butadiene and styrene and a layer of a metallic coating which is provided optionally via a layer of an adhesive, and optionally a layer of a top coating. Said metal-coated plastic product has excellent properties such as excellent stiffness, plasticity, processability, and further beautiful and gloss appearance and is useful as a substitute of metallic products.
    Type: Grant
    Filed: July 6, 1979
    Date of Patent: May 19, 1981
    Assignee: Toyo Boseki Kabushiki Kaisha
    Inventors: Hiroshi Imanaka, Yoshihiko Kijima
  • Patent number: 4267286
    Abstract: Modified thermoplastic polyester compositions are provided which comprise (a) a poly(1,4-butylene terephthalate) resin or polyester copolymer and, optionally, a poly(ethylene terephthalate) resin and (b) a modifier therefor comprising a combination of a polyacrylate resin or a vinyl aromatic-diene block copolymer resin and a poly(1,3-butylene terephthalate), and, optionally (c) filler and/or reinforcing agent and/or (d) a flame retardant or combination of flame retardants. Modifier (b) provides enhanced resistance to impact fracture in articles molded from the compositions.
    Type: Grant
    Filed: July 3, 1979
    Date of Patent: May 12, 1981
    Assignee: General Electric Company
    Inventor: Richard W. Campbell
  • Patent number: 4259458
    Abstract: Described herein are molding compositions comprising a blend of a polyarylate, a polyester, and at least one thermoplastic polymer selected from the group consisting of an aromatic polycarbonate, a styrene resin, an alkyl acrylate resin, a polyurethane, a vinyl chloride polymer, a poly(aryl ether), a copolyetherester block polymer or a polyhydroxyether. These blends have excellent compatability and can be molded into a variety of articles.
    Type: Grant
    Filed: August 9, 1979
    Date of Patent: March 31, 1981
    Assignee: Union Carbide Corporation
    Inventor: Lloyd M. Robeson
  • Patent number: 4247427
    Abstract: Thermoplastic segmented copolyester elastomer consisting essentially of a multiplicity of recurring short chain ester units and long chain ester units joined through ester linkages, said short chain ester units amounting to 15 to 75 percent by weight of said copolyester and being derived from dicarboxylic acid such as an aromatic acid, e.g., terephthalic acid or a mixture of terephthalic acid and isophthalic acid, and an organic diol such as butanediol, and said long chain ester units amounting to 25 to 85 percent by weight of said copolyester and being derived from dicarboxylic acid such as an aromatic acid, e.g., terephthalic acid, or a mixture of terephthalic and isophthalic acids, and a long chain glycol such as polytetramethylene ether glycol, said copolyester having a melt index of less than 150 and a melting point of at least 90.degree. C., modified with 0.
    Type: Grant
    Filed: May 14, 1979
    Date of Patent: January 27, 1981
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: John M. Edinger
  • Patent number: 4223106
    Abstract: Polyethylene terephthalate copolymers comprising (I) blocksegments having a glass transition temperature below 0.degree. C. and (II) polyethylene terephthalate segments modified with certain diols having 3 to 10 carbon atoms, have an excellent rate of crystallization and necessitate mould temperatures of below 100.degree. C.
    Type: Grant
    Filed: October 6, 1976
    Date of Patent: September 16, 1980
    Assignee: Bayer Aktiengesellschaft
    Inventors: Peter Bier, Rudolf Binsack, Dieter Rempel
  • Patent number: 4217426
    Abstract: Semi-crystalline polyester/low viscosity polyethylene melt blends, which are non-tacky and non-blocking and are more readily grindable by cryogenic grinding techniques, for providing powders suitable for powder adhesives particularly useful for fusible interlinings or for providing powder coating materials.
    Type: Grant
    Filed: January 19, 1979
    Date of Patent: August 12, 1980
    Assignee: Eastman Kodak Company
    Inventors: Richard L. McConnell, Doyle A. Weemes
  • Patent number: 4207230
    Abstract: The current invention is concerned with block copolyesters of low glass transition temperature segments and ethylene glycol based polyester segments linked together by carboxylic acid ester groups and special diols, and a process for preparing these copolyesters. These copolyesters display molded resin properties similar to polyethylene terephthalate but crystallization behavior similar to polybutylene terephthalate, i.e. they have high strength and superior solvent resistance, but they also crystallize rapidly. They are made by subjecting low glass transition temperature (less than 0.degree. C.) polymers with carboxyl, hydroxyl or reactive ester end groups to esterification or transesterification conditions with ethylene glycol based polyester segments having a minimum intrinsic viscosity of 0.2 dl/g and special diols having four to ten carbon atoms with 3 or 4 carbon atoms between the hydroxyl groups in the presence of appropriate catalysts.
    Type: Grant
    Filed: February 3, 1978
    Date of Patent: June 10, 1980
    Assignee: Bayer Aktiengesellschaft
    Inventors: Peter Bier, Rudolf Binsack