Preparing Esters From Alkylene Oxides Patents (Class 560/209)
  • Latent catalysts for promoting reaction of epoxides with phenols and/or carboxylic acids
    Patent number: 4171420
    Abstract: The trisubstituted (2,5-dihydroxyphenyl)phosphonium hydroxide inner salts and their hydrolyzed derivatives are novel latent catalysts for promoting reaction between vicinal epoxides and phenols and/or carboxylic acids (or anhydrides). Precatalyzed epoxy resins are easily prepared using such catalysts.
    Type: Grant
    Filed: September 26, 1978
    Date of Patent: October 16, 1979
    Assignee: The Dow Chemical Company
    Inventors: George A. Doorakian, Lawrence G. Duquette
  • Preparation of esters of poly-(tetramethylene ether) glycol
    Patent number: 4163115
    Abstract: Esters of poly(tetramethylene ether) glycol are prepared by polymerizing tetrahydrofuran in a reaction mixture which contains, in addition to the tetrahydrofuran, and acylium ion precursor such as acetic anhydride, a polymeric catalyst which contains sulfonic acid groups and, optionally, a carboxylic acid such as acetic acid.
    Type: Grant
    Filed: January 13, 1978
    Date of Patent: July 31, 1979
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: George E. Heinsohn, Ivan M. Robinson, Gerfried Pruckmayr, Walter W. Gilbert
  • Latent catalysts for promoting reaction of epoxides with phenols and/or carboxylic acids
    Patent number: 4132706
    Abstract: The trisubstituted (2,5-dihydroxyphenyl)phosphonium hydroxide inner salts and their hydrolyzed derivatives are novel latent catalysts for promoting reaction between vicinal epoxides and phenols and/or carboxylic acids (or anhydrides). Precatalyzed epoxy resins are easily prepared using such catalysts.
    Type: Grant
    Filed: April 5, 1976
    Date of Patent: January 2, 1979
    Assignee: The Dow Chemical Company
    Inventors: George A. Doorakian, Lawrence G. Duquette
  • Latent catalysts for promoting reaction of epoxides with phenols and/or carboxylic acids
    Patent number: 4131633
    Abstract: Certain phosphorus-containing compounds are described herein which are novel latent catalysts for promoting the reaction between vicinal epoxides and phenols and/or carboxylic acids (or anhydrides). Precatalyzed epoxy resins are easily prepared using such catalysts.
    Type: Grant
    Filed: April 11, 1977
    Date of Patent: December 26, 1978
    Assignee: The Dow Chemical Company
    Inventors: George A. Doorakian, Dennis L. Schmidt, Martin C. Cornell, III
  • Brominated acrylate dental compositions
    Patent number: 4119610
    Abstract: Dental restorative, pit and fissure sealant compositions having improved environmental resistance include a brominated acrylate such as dibromopropyl methacrylate and/or a diacrylate of the formula: ##STR1## where n is an integer from 1 to 6, R.sup.1 is hydrogen or alkyl of 1 to 6 carbon atoms, R.sup.2 is alkylene of 1 to 5 carbon atoms or ##STR2## WHERE R.sup.3 is hydrogen, alkyl of 1 to 4 carbon atoms or --OH and x and y are selected from 0 or an integer from 1 to 4 and Ar is a cyclic group, preferably an aromatic group.
    Type: Grant
    Filed: April 25, 1977
    Date of Patent: October 10, 1978
    Assignee: Arroyo Dental Products Co.
    Inventor: David H. Kaelble
  • Production of hydroxy ethers
    Patent number: 4118426
    Abstract: A process for the preparation of hydroxy ethers which comprises reacting an epoxide compound with an organic hydroxy compound in the presence of a PdCl.sub.2 /CuCl.sub.2 /O.sub.2 catalyst system, and recovering the hydroxy ether thus formed from the reaction mixture by a separation step such as distillation. An alternative catalyst system is K.sub.2 PdCl.sub.6 /CuCl.sub.2 /O.sub.2.
    Type: Grant
    Filed: May 10, 1977
    Date of Patent: October 3, 1978
    Assignee: Western Kentucky University
    Inventors: Norman L. Holy, Theodore E. Nalesnik
  • Curable mixtures and cured resins made from linear polymers of glycidol
    Patent number: 4086151
    Abstract: Linear copolymers of glycidol, glycidyl esters of unsaturated fatty acids and, optionally, alkylene oxides, are made by the reaction of an unsaturated fatty acid with a polymer or copolymer of tert.-butyl glycidyl ether in the presence of an acid catalyst. The products are polymerizable and copolymerizable with vinyl monomers and are useful as curable resins.
    Type: Grant
    Filed: June 30, 1977
    Date of Patent: April 25, 1978
    Assignee: The Dow Chemical Company
    Inventors: Violete L. Stevens, Arthur R. Sexton, Frederick P. Corson
  • Process for preparation of .beta.-hydroxy esters by reaction of organic carboxylic acids and vicinal epoxides
    Patent number: 4069242
    Abstract: A synergistic catalytic effect is realized in the esterification reaction between an organic carboxylic acid and a vicinal epoxide by using a catalyst system comprising: (a) a compound containing an amino and/or ammonium nitrogen atom, in combination with (b) a soluble compound containing an ionizable atom of iron or chromium.
    Type: Grant
    Filed: September 9, 1971
    Date of Patent: January 17, 1978
    Assignee: The Dow Chemical Company
    Inventor: Arthur E. Gurgiolo