Patents Assigned to Copolymer Rubber
  • Emulsion polymerization
    Patent number: 4450260
    Abstract: A process for the emulsion polymerization of one or more polymerizable monomers wherein the emulsion polymerization is carried out in the presence of an emulsifier in the form of a diacid of a cyclic alkane or alkene. Emulsifiers of that type have been found to provide improved latex stability, improved bloom and improved processability of the resulting polymer.
    Type: Grant
    Filed: February 7, 1983
    Date of Patent: May 22, 1984
    Assignee: Copolymer Rubber & Chemical Corp.
    Inventors: George A. Von Bodungen, Rudy F. Karg
  • Method of processing low molecular weight EPM and EPDM polymers
    Patent number: 4447582
    Abstract: A method of improving the handling of low molecular weight EPM or EPDM polymers which includes reacting the low molecular weight polymer with a monomer capable of providing quaternary salt forming groups and then cross linking the resulting polymer with a difunctional cross linking agent whereby the polymer takes on the characteristics of a high molecular weight polymer but which can be returned to the characteristics of a low molecular weight polymer upon exposure to elevated temperature.
    Type: Grant
    Filed: April 8, 1983
    Date of Patent: May 8, 1984
    Assignee: Copolymer Rubber & Chemical Corporation
    Inventor: Harold J. Gros
  • High green strength synthetic rubbers and method
    Patent number: 4423198
    Abstract: The preparation of synthetic rubbers characterized by high green strength and tack in which a polymerizable unsaturated tertiary amine and a polymerizable cross linking agent in the form of an organic compound containing active halogen groups are copolymerized with the rubber forming monomers.
    Type: Grant
    Filed: September 24, 1982
    Date of Patent: December 27, 1983
    Assignee: Copolymer Rubber & Chemical Corporation
    Inventor: Tom Tsai
  • Method of grafting EPM and EPDM polymers
    Patent number: 4340689
    Abstract: A process for grafting functional organic groups onto EPM and EPDM polymers wherein the grafting reaction is carried out in the cement in which the polymer is originally formed by solution polymerization.
    Type: Grant
    Filed: September 17, 1979
    Date of Patent: July 20, 1982
    Assignee: Copolymer Rubber & Chemical Corporation
    Inventor: Ralph K. Joffrion
  • High green strength rubbers
    Patent number: 4316825
    Abstract: The green strength of SBR, SBR-polybutadiene, natural rubber or combinations thereof is improved by blending with an EPDM or EPM having a high degree of crystallinity.
    Type: Grant
    Filed: November 28, 1980
    Date of Patent: February 23, 1982
    Assignee: Copolymer Rubber & Chemical Corp.
    Inventor: Kenneth H. Wirth
  • Polar resins having improved characteristics by blending with EPM and EPDM polymers
    Patent number: 4251644
    Abstract: The improvement of physical and mechanical properties of polar resins such as nylon and dacron resins by blending with EPM and EPDM resins which have been rendered more compatible by the modification to incorporate polar groups.
    Type: Grant
    Filed: October 1, 1979
    Date of Patent: February 17, 1981
    Assignee: Copolymer Rubber & Chemical Corporation
    Inventor: Ralph K. Joffrion
  • Free flowing particles of elastomeric material and method
    Patent number: 4233365
    Abstract: Elastomeric particles which are rendered free flowing by treatment with the combination of a finely divided partitioning agent and a fibrilatable polymer which has been fibrilated to form a network on the surface of the elastomeric material with retention of the partitioning agent thereby.
    Type: Grant
    Filed: April 6, 1979
    Date of Patent: November 11, 1980
    Assignee: Copolymer Rubber & Chemical Corp.
    Inventor: Rudolph F. Karg
  • Particulate elastomeric materials and method
    Patent number: 4213888
    Abstract: The preparation of elastomeric materials in the form of free flowing particles in which the latex formed by the polymerization of the monomers in aqueous medium is coagulated to produce particles of a size within the range of 0.5 to 5 millimeters and in which the particles are ultimatedly dried and then cooled while in a fluidized state and which includes the addition of partitioning agents to obstruct agglomeration.
    Type: Grant
    Filed: July 14, 1978
    Date of Patent: July 22, 1980
    Assignee: Copolymer Rubber & Chemical Corporation
    Inventors: Rudolph F. Karg, Harold J. Gros
  • Method for producing free flowing particles of elastomeric material
    Patent number: 4183887
    Abstract: Elastomeric particles which are rendered free flowing by treatment with the combination of a finely divided partitioning agent and a fibrilatable polymer which has been fibrilated to form a network on the surface of the elastomeric material with retention of the partitioning agent thereby.
    Type: Grant
    Filed: April 28, 1977
    Date of Patent: January 15, 1980
    Assignee: Copolymer Rubber & Chemical Corporation
    Inventor: Rudolph F. Karg
  • Ethylene, C.sub.3-16 monoolefin polymer containing 0.02%-0.6% by weight vinyl norbornene bound in the polymer having improved cold flow
    Patent number: 4156767
    Abstract: EP polymer of low molecular weight containing 0.02% to 0.6% by weight vinyl norbornene or norbornadiene whereby the cold flow of the EP polymer is improved with resultant improvement in recoverability and handling without noticeable modification in molecular weight distribution or shear stability and without interfering with the use thereof as an oil additive, and without so much as to decrease oil solubility rate.
    Type: Grant
    Filed: May 16, 1977
    Date of Patent: May 29, 1979
    Assignee: Copolymer Rubber & Chemical Corporation
    Inventor: James R. Hall
  • Curable composition containing EPM or EPDM interpolymers
    Patent number: 4153765
    Abstract: Room temperature curable composition containing EPM or EPDM interpolymers having bound ethylene organosilane monomers in which residual hydrolyzable groups of the bound organosilicon components are in the form of lower alkoxy groups, an organotin carboxylate for controlling cure, and which may include an organic amine, an aminosilane, organic hydroxyl compounds and fillers, and in which the EPM or EPDM is of lower molecular weight fluid consistency.
    Type: Grant
    Filed: March 27, 1978
    Date of Patent: May 8, 1979
    Assignee: Copolymer Rubber & Chemical Corporation
    Inventor: Thomas C. H. Tsai
  • Thermoplastic elastomer blend of EPDM, polyethylene, and a C.sub.3 -C.sub.1 6
    Patent number: 4059654
    Abstract: A thermoplastic elastomer which is ideally suited for use in the fabrication of premium grade hose and other uses because of its smooth, soft and rubbery feel under widely varying temperature conditions, coupled with its exceptionally low compression set and good flexibility.
    Type: Grant
    Filed: November 2, 1976
    Date of Patent: November 22, 1977
    Assignee: Copolymer Rubber & Chemical Corporation
    Inventors: George A. Von Bodungen, Curtis L. Meredith
  • EPDM interpolymers formed with unsaturated organosilanes
    Patent number: 4028483
    Abstract: An interpolymer of ethylene, a monoolefin containing from 3-20 carbon atoms, a polyene, and an unsaturated organosilane in which the interpolymer is prepared by interpolymerization reaction in the presence of a Ziegler type catalyst.
    Type: Grant
    Filed: September 8, 1975
    Date of Patent: June 7, 1977
    Assignee: Copolymer Rubber & Chemical Corporation
    Inventors: William C. Bond, Jr., Harold J. Wahlborg
  • Fulvene-silane adduct and ethylene interpolymers embodying same
    Patent number: 4022961
    Abstract: An adduct of a fulvene and unsaturated silane produced in a Diels-Alder reaction and the interpolymerization of the adduct with ethylene, with or without propylene, with or without a polyene, in the preparation of ethylene interpolymers.
    Type: Grant
    Filed: September 8, 1975
    Date of Patent: May 10, 1977
    Assignee: Copolymer Rubber & Chemical Corporation
    Inventors: William C. Bond, Jr., Harold J. Wahlborg
  • Fulvene-silane adduct and ethylene interpolymers embodying same
    Patent number: 3994947
    Abstract: An adduct of a fulvene and unsaturated silane produced in a Diels-Alder reaction and the interpolymerization of the adduct with ethylene, with or without propylene, with or without a polyene, in the preparation of ethylene interpolymers.
    Type: Grant
    Filed: February 10, 1975
    Date of Patent: November 30, 1976
    Assignee: Copolymer Rubber & Chemical Corporation
    Inventors: William C. Bond, Jr., Harold J. Wahlborg
  • Thermoplastic elastomer composition and method for preparation
    Patent number: 3957919
    Abstract: A thermoplastic elastomer formed by an EPDM interpolymer, an uncross-linked polyethylene and an uncross-linked polymer of a monoolefin containing 3 to 16 carbon atoms and preferably polypropylene and in which the polyethylene component is present in an amount of at least 4% and preferably 5-15% by weight of the combined weight of the polymeric material and which are simultaneously subjected to hot working and a free radical reaction.
    Type: Grant
    Filed: September 24, 1974
    Date of Patent: May 18, 1976
    Assignee: Copolymer Rubber & Chemical Corporation
    Inventors: George A. Von Bodungen, Curtis L. Meredith