Patents by Inventor Richard L. Frentzel

Richard L. Frentzel has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Polyoxyalkylene/unsaturated diester reaction product for cellular foam stabilization
    Patent number: 4520140
    Abstract: Polyoxyalkylene surfactants for cellular foams can be prepared by reacting a polyoxyalkylene adduct and an esterified unsaturated dibasic acid in the presence of a free-radical initiator.
    Type: Grant
    Filed: October 22, 1984
    Date of Patent: May 28, 1985
    Assignee: The Celotex Corporation
    Inventor: Richard L. Frentzel
  • Metal catalyzed preparation of polyoxyalkylene surfactants for phenolic foam stabilization
    Patent number: 4518719
    Abstract: Polyoxyalkylene surfactants for cellular foams can be prepared by reacting under free radical polymerization conditions a polyoxyalkylene adduct, a cyclic nitrogenous vinyl monomer and an esterified unsaturated dibasic acid in the presence of an organic or inorganic per-compound and a metal catalyst.
    Type: Grant
    Filed: September 10, 1984
    Date of Patent: May 21, 1985
    Assignee: The Celotex Corporation
    Inventor: Richard L. Frentzel
  • Metal catalyzed preparation of polyoxyalkylene surfactants for phenolic foam stabilization
    Patent number: 4490489
    Abstract: Polyoxyalkylene surfactants for cellular foams can be prepared by reacting under free radical polymerization conditions a polyoxyalkylene adduct, a cyclic nitrogenous vinyl monomer and an esterified unsaturated dibasic acid in the presence of an organic or inorganic per-compound and a metal catalyst.
    Type: Grant
    Filed: March 2, 1984
    Date of Patent: December 25, 1984
    Assignee: The Celotex Corporation
    Inventor: Richard L. Frentzel
  • Extraction of polyoxyalkylene surfactants for phenolic foam stabilization
    Patent number: 4485194
    Abstract: Polyoxyalkylene foam stabilizing surfactants can be prepared by reacting a polyoxyalkylene adduct, a cyclic nitrogenous vinyl monomer and an esterified unsaturated dibasic acid under free radical polymerization conditions in the presence of a free radical initiator, and by subjecting the reaction product obtained to a solvent extraction. The isolated components can be utilized as surfactants in producing cellular foams.
    Type: Grant
    Filed: October 17, 1983
    Date of Patent: November 27, 1984
    Assignee: The Celotex Corporation
    Inventors: Richard L. Frentzel, Ernest K. Moss
  • Polyoxyalkylene/unsaturated diester reaction product for cellular foam stabilization
    Patent number: 4481307
    Abstract: Polyoxyalkylene surfactants for cellular foams can be prepared by reacting a polyoxyalkylene adduct and an esterified unsaturated dibasic acid in the presence of a free-radical initiator.
    Type: Grant
    Filed: October 21, 1983
    Date of Patent: November 6, 1984
    Assignee: The Celotex Corporation
    Inventor: Richard L. Frentzel
  • Preparation of carboxylic acid-containing polyurethane prepolymers and aqueous dispersions thereof
    Patent number: 4460738
    Abstract: Disclosed is a process for making carboxylic acid-containing mono- and polyether polyol addition products by reacting maleic acid, fumaric acid, itaconic acid, or mixtures thereof with at least one polyhydroxy-containing mono- or polyether compound (e.g. a polyether diol or triol) in the presence of a peroxy-type free radical initiator. Also disclosed are the processes of making polyurethane prepolymers and aqueous polyurethane dispersions from these carboxylic acid-containing mono- and polyether polyol addition products and processes for using these dispersions in coatings, adhesives and other useful products.
    Type: Grant
    Filed: March 16, 1983
    Date of Patent: July 17, 1984
    Assignee: Olin Corporation
    Inventors: Richard L. Frentzel, Louis Rua, Jr., Anne L. Pacheco
  • Metal catalyzed preparation of polyoxyalkylene surfactants for phenolic foam stabilization
    Patent number: 4438018
    Abstract: Polyoxyalkylene surfactants for cellular foams can be prepared by reacting under free radical polymerization conditions a polyoxyalkylene adduct, a cyclic nitrogenous vinyl monomer and an esterified unsaturated dibasic acid in the presence of an organic or inorganic per-compound and a metal catalyst.
    Type: Grant
    Filed: November 9, 1981
    Date of Patent: March 20, 1984
    Assignee: The Celotex Corporation
    Inventor: Richard L. Frentzel
  • Polyoxyalkylene/unsaturated diester reaction product for cellular foam stabilization
    Patent number: 4418158
    Abstract: Polyoxyalkylene surfactants for cellular forms can be prepared by reacting a polyoxyalkylene adduct and an esterified unsaturated dibasic acid in the presence of a free-radical initiator.
    Type: Grant
    Filed: September 29, 1982
    Date of Patent: November 29, 1983
    Assignee: The Celotex Corporation
    Inventor: Richard L. Frentzel
  • Extraction of polyoxyalkylene surfactants for phenolic foam stabilization
    Patent number: 4412014
    Abstract: Polyoxyalkylene foam stabilizing surfactants can be prepared by reacting a polyoxyalkylene adduct, a cyclic nitrogenous vinyl monomer and an esterified unsaturated dibasic acid under free radical polymerization conditions in the presence of a free radical initiator, and by subjecting the reaction product obtained to a solvent extraction. The isolated components can be utilized as surfactants in producing cellular foams.
    Type: Grant
    Filed: June 29, 1981
    Date of Patent: October 25, 1983
    Assignee: The Celotex Corporation
    Inventors: Richard L. Frentzel, Ernest K. Moss
  • Polyoxyalkylene/unsaturated diester reaction product for cellular foam stabilization
    Patent number: 4365024
    Abstract: Polyoxyalkylene surfactants for cellular foams can be prepared by reacting a polyoxyalkylene adduct and an esterified unsaturated dibasic acid in the presence of a free-radical initiator.
    Type: Grant
    Filed: July 10, 1981
    Date of Patent: December 21, 1982
    Assignee: The Celotex Corporation
    Inventor: Richard L. Frentzel
  • Polyaromatic ether-keto-sulfones and their synthesis
    Patent number: 4252937
    Abstract: Polymers having pendant phenylethynyl groups are obtained by reacting phenylacetylene with a bromine-containing polymer prepared by reacting bis-p-phenoxy-4,4'-(2,2'-dibromodiphenyl)ketone or 2,2'-dibromodiphenyl-4,4'-dicarbonyldichloride with isophthaloyl dichloride and 4,4'-bis-p-phenoxydiphenylsulfone. Because the polymers cure without the evolution of volatiles and have softening points higher than their cure temperatures, they are especially suitable for use in fabricating fiber-reinforced composites.
    Type: Grant
    Filed: June 8, 1979
    Date of Patent: February 24, 1981
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Carl S. Marvel, Richard L. Frentzel