Abstract: Solvent soluble epoxy-containing compositions prepared by polymerizing ethylenically unsaturated monomers such as alkyl acrylates in the presence of the reaction product of a liquid epoxy resin such as a diglycidyl ether of bisphenol A and acrylic acid and/or methacrylic acid. These compositions are useful in the preparation of coatings.
Abstract: A catalyst for polymerizing olefins is the product resulting from a mixture of (A) an organomagnesium material, (B) essentially anhydrous carbon dioxide, (C) a reducing halide source and (D) the reaction product or complex resulting from admixing a transition metal compound and an organozinc compound.
Type:
Grant
Filed:
October 17, 1983
Date of Patent:
July 16, 1985
Assignee:
The Dow Chemical Company
Inventors:
Ricardo Fuentes, Jr., Calvin P. Esneault
Abstract: A composition consisting essentially of (I) at least one polyol having an average of more than 2 hydroxyl groups per molecule and an average hydroxyl equivalent weight of at least about 500 and (II) as a chain extender composition (A) an aliphatic amine-containing material having at least one primary aliphatic amine group per molecule and (B) at least one material selected from (1) hydroxyl-containing materials, or (2) aromatic amine-containing materials.These compounds are useful in preparing polyurethane articles employing reaction injection molding technology.
Type:
Grant
Filed:
November 7, 1983
Date of Patent:
January 22, 1985
Assignee:
The Dow Chemical Company
Inventors:
James A. Vanderhider, Gerald M. Lancaster
Abstract: Reactive monomers are prepared by reacting (1) an aromatic compound containing a polymerizable ethylenically unsaturated group and a group containing a hydrogen atom reactive with an NCO or NCS group, (2) a compound having at least one oxyalkylene group and at least one group containing at least one hydrogen atom reactive with an NCO or an NCS group and (3) a compound having an average of more than one NCO and/or NCS groups per molecule. These reactive monomers are useful as reactive modifiers for polyester and vinyl ester resins.
Abstract: Transition metal-derived coordination catalyst residues are neutralized by contacting with a pseudo-polyester material such as calcium stearoyl lactylate, which is comprised of a metal salt of a condensation reaction product of a fatty acid and a hydroxyl-containing acid.
Abstract: Compositions containing a relatively low equivalent weight epoxy resin and an advancement catalyst for reacting said epoxy resin with a polyhydric phenol are stable at high storage temperatures when the advancement catalyst is a phosphonium salt of phosphoric acid, phosphorous acid or polyphosphoric acid.
Abstract: High molecular weight epoxy resins containing hydrolyzed epoxy groups are prepared by reacting (A) a low molecular weight epoxy resin, and (B) a hydroxyl-containing compound in the presence of (C) a catalyst therefor and (D) an excess quantity of water and thereafter removing the excess water.
Abstract: Mono- and dibasic alkali metal periodates are prepared by reacting tri-, tetra- and pentabasic alkali metal periodates with a substance having a relative acidity value, pKa, of from 3 to 16 at a temperature of from 0.degree. to 100.degree. C at molar ratios of periodate to moles of acidic substance of 1:1 to 1:1000. The mono- and dibasic alkali metal periodates are useful in oxidizing olefins such as propylene to the corresponding oxide such as propylene oxide.
Abstract: This invention is concerned with water-soluble epoxy resins represented by the general formula ##STR1## wherein A and B are independently selected from the group consisting of hydrogen and the ##STR2## radical; X is a halogen having an atomic number from 17 to 53 inclusive and a, b and c are integers the sum of which equals a number from 0 to 3. These water-soluble glycidyl ethers of glycerine are prepared by reacting glycerine with an epoxyalkyl halide in the presence of a Lewis Acid catalyst, subsequently at least partially dehydrohalogenating the resulting product, and finally recovering the water-soluble glycidyl ether product. Both the condensation reaction and the dehydrohalogenation reaction are carried out in the presence of an organic solvent. The products of this invention are polymerizable and useful in the same way as other glycidyl ethers but additionally may be used in aqueous formulations for coatings, adhesives and the like.
Abstract: A process for preparing thermoplastic polyether resins from bisphenols, particularly having significant quantities of the o, p- or o, o-isomers such as bisphenol A and epoxy resins such as the diglycidyl ether of bisphenol A is improved by the addition of small quantities of a halogenated bisphenol such as tetrabromobisphenol A preferably near the end of the reaction. The process provides a product higher in molecular weight than that obtained without the use of the halogenated bisphenol.
Abstract: Compositions exhibiting high catalytic activity in the polymerization of .alpha.-olefins are provided by reacting a dinitrogen and/or dihydrogen complex of a transition metal such as titanium with an organometallic compound of a divalent metal such as dihydrocarbyl magnesium or hydrocarbyl magnesium halide and a halide source such as alkyl aluminum halide. Polymerization processes employing this catalyst composition do not require conventional catalyst removal steps in order to provide polymers having suitable color and other physical characteristics.
Abstract: Cuprous aluminum tetrahalide complexing agents are prepared from cuprous halide such as cuprous chloride contaminated with cupric halide by a method which reduces the cupric ion to the cuprous ion by treating the contaminated cuprous halide with an organo metal compound, such as metal alkyls, metal alkyl halide or metal alkoxides such as diethyl aluminum chloride prior to preparation of the complexing agent by reacting the cuprous halide with an aluminum trihalide such as aluminum trichloride. The pretreatment to remove the cupric ions reduces the amount of aromatic tars formed in processes employing the complexing agents.
Type:
Grant
Filed:
May 2, 1977
Date of Patent:
July 11, 1978
Assignee:
The Dow Chemical Company
Inventors:
Christopher P. Christenson, John W. Faller, Gary M. McNamee
Abstract: Heat exchangers which become fouled during cooling of CuAlCl.sub.4 .multidot.solvent (such as toluene) solutions employed in extracting carbon monoxide from acetylene is cleaned by circulating through the fouled exchanger a solvent solution of CuAlCl.sub.4 .multidot.solvent containing aluminum trichloride.
Type:
Grant
Filed:
May 3, 1977
Date of Patent:
July 11, 1978
Assignee:
The Dow Chemical Company
Inventors:
Christopher P. Christenson, Gary M. McNamee
Abstract: Polyurethane and vinyl polymer composites are rapidly prepared without the requirement of the application of an external source of heat by the admixture of a composition comprising(A) a polyether polyol having an equivalent weight of 30-250, such as an adduct of glycerine with propylene oxide;(B) an organic polyisocyanate, such as toluene diisocyanate;(C) an ethylenically unsaturated monomer, such as styrene;(D) a catalyst for polymerizing ethylenically unsaturated monomers such as tertiary butyl perbenzoate; and(E) a catalyst for urethane formation such as lead octoate.Foams may also be prepared by adding an appropriate foaming agent.
Type:
Grant
Filed:
May 23, 1977
Date of Patent:
July 4, 1978
Assignee:
The Dow Chemical Company
Inventors:
Franciszek Olstowski, Donald B. Parrish
Abstract: Rapid-setting polyurethanes are prepared employing a mixture consisting of an aliphatic monomeric triol and derivatives of propylene glycol having an equivalent weight of less than about 230 as the polyol component therein.
Type:
Grant
Filed:
March 4, 1974
Date of Patent:
February 28, 1978
Assignee:
The Dow Chemical Company
Inventors:
Franciszek Olstowski, Donald Bob Parrish
Abstract: Rapid setting polyurethanes are prepared from polyols having a functionality of from 2 to 8, a polyisocyanate, a non-amine containing catalyst and as a modifier, a polymer of an ethyleniclly unsaturated monomer said polymer having the following characteristics:(1) a molecular weight such that the polymer has a grease melt flow index as determined with a 0.02 inch orifice employing a total weight of 2160 grams at 80.degree. C of from about 1 to about 250 decigrams/minute;(2) a solubility parameter at 25.degree. C of at least about 8;(3) and a specific heat of at least 0.35 cal/g/.degree. C.
Abstract: Compositions which will rapidly set to produce solid, rigid polyurethanes without the use of a catalyst comprise an amine initiated polyether polyol such as triethanol amine, an organic aromatic polyisocyanate, such as toluene diisocyanate and a liquid modifier compound having a boiling point above about 150.degree. C such as a non-hydroxyl-containing polyoxy-alkylene compound.
Abstract: Compositions exhibiting high catalytic activity in the polymerization of .alpha.-olefins are provided by mixing a dinitrogen and/or dihydrogen complex of a transition metal such as titanium with a conventional Ziegler catalyst such as the reaction product of titanium tetrachloride and aluminum triethyl. Polymerization processes employing this catalyst composition do not require conventional catalyst removal steps in order to provide polymers having suitable color and other physical characteristics.
Type:
Grant
Filed:
June 23, 1976
Date of Patent:
January 10, 1978
Assignee:
The Dow Chemical Company
Inventors:
Donald Earl Gessell, Gaylon Le Roy Dighton, Luis Daniel Valenzuela-Bernal
Abstract: An improved process for the preparation of flexible polyurethane foams which comprise conducting the foaming in the presence of a delayed action catalyst and an inorganic filler having a pH 5 to 10, preferably 6 to 8, and an average particle size of 2-30 microns, preferably 5-15 microns. The process is suitable for slabstock and molded foams.
Abstract: Mixtures comprising a low molecular weight diol, a liquid modifier compound having a boiling point above about 150.degree. C, such as a fatty acid or fatty oil, a polyisocyanate having a functionality of at least about 2.5 and an organotin catalyst instantly set, after a brief induction period, to a solid, dense, rigid polymeric product which can be demolded within a period of from less than 1 minute to about 5 minutes.