Patents by Inventor Ernest R. Kamens

Ernest R. Kamens 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).

  • Foaming of unsaturated polyester resin at elevated temperatures
    Patent number: 4636528
    Abstract: Low density foams are prepared from an admixture which comprises an unsaturated polyester resin, a free radical initiator which initiator is activated at temperatures from about 100.degree. to about 400.degree. F., and a compound selected from a t-alkylhydrazinium salt or a carbonylhydrazine. The low density foams have uniform cell structure without cracks or voids and the process is efficient.
    Type: Grant
    Filed: May 21, 1986
    Date of Patent: January 13, 1987
    Assignee: Pennwalt Corporation
    Inventors: Ernest R. Kamens, John P. Cassoni
  • Unsaturated polyester resin foams using inorganic iron salts
    Patent number: 4460714
    Abstract: Low density polyester resin foams are prepared at ambient temperatures from an admixture of an unsaturated polyester resin, an organic isocyanate compound, a peroxide curing agent system, a surfactant, and an accelerator whereby the foaming efficiency of this admixture is improved by adding small amounts of an inorganic iron salt.
    Type: Grant
    Filed: December 1, 1983
    Date of Patent: July 17, 1984
    Assignee: Pennwalt Corporation
    Inventor: Ernest R. Kamens
  • Reaction of carbonylhydrazines and organic peroxides to foam unsaturated polyester resins
    Patent number: 4435525
    Abstract: Low density foams are prepared from an admixture which comprises a medium which is polymerizable and/or crosslinkable by free radical initiation, carbonylhydrazine blowing agent, a peroxide curing agent, a suitable surfactant, and at least one transition metal salt promoter wherein at least one of the metal salts is a compound of iron or copper. The blowing agent in the presence of an effective amount of the transitional metal salt promoter improves the efficiency of the process.
    Type: Grant
    Filed: March 28, 1983
    Date of Patent: March 6, 1984
    Assignee: Pennwalt Corporation
    Inventor: Ernest R. Kamens
  • Reaction of t-alkylhydrazinium salts and ogranic peroxides to foam unsaturated polyester resins
    Patent number: 4393148
    Abstract: Low density foams are prepared from an admixture which comprises a medium which is polymerizable and/or crosslinkable by free radical initiation, a t-alkylhydrazinium salt blowing agent, a peroxide curing agent, a suitable surfactant, and at least one transition metal salt promoter wherein at least one of the metal salts is a compound of iron or copper. The t-alkylhydrazinium salt blowing agent in the presence of an effective amount of the transitional metal salt promoter improves the efficiency of the process.
    Type: Grant
    Filed: September 30, 1982
    Date of Patent: July 12, 1983
    Assignee: Pennwalt Corporation
    Inventor: Ernest R. Kamens
  • Process for foaming a polymerizable medium using acid sensitive azo compounds with a polymerizable monomer and free radical inhibitor
    Patent number: 4167613
    Abstract: In the foaming of a polymerizable medium (such as an unsaturated polyester resin) by using acid sensitive azo compounds, significant improvement in the foaming efficiency can be obtained by incorporating in the resin medium 0.001%-10% by weight based on the weight of the resin compounds which exert an inhibiting effect on free radical polymerization. Examples of such compounds include methacrylonitrile, alphamethylstyrene and laurylmercaptan.
    Type: Grant
    Filed: June 5, 1978
    Date of Patent: September 11, 1979
    Assignee: Pennwalt Corporation
    Inventors: Ernest R. Kamens, Vasanth R. Kamath