Patents by Inventor Kyosaku Sato
Kyosaku Sato 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).
-
Patent number: 5506306Abstract: Polyethylene has a number of desirable properties. However, for some thin film applications it is desirable to increase the stiffness of the film. This may be accomplished by incorporating a polymer of a vinyl aromatic monomer into the alloy. Such two-component blends have a low impact and low tear resistance. These deficient properties of the alloy may be significantly increased, without any significant loss of stiffness by further incorporating into the alloy a polymer based on a copolymer of ethylene and an alkyl ester of an ethylenically unsaturated carboxylic acid.Type: GrantFiled: November 9, 1994Date of Patent: April 9, 1996Assignee: Novacor Chemicals Ltd.Inventor: Kyosaku Sato
-
Patent number: 5403889Abstract: Polyethylene has a number of desirable properties. However for some thin film applications it is desirable to increase the stiffness of the film. This may be accomplished by incorporating a polymer of a vinyl aromatic monomer into the alloy. Such two component blends have a low impact resistance. The impact resistance of the alloy may be significantly increased, without any significant loss of stiffness by further incorporating into the alloy a polymer based on butylene-1.Type: GrantFiled: November 17, 1993Date of Patent: April 4, 1995Assignee: Novacor Chemicals Ltd.Inventor: Kyosaku Sato
-
Patent number: 5268051Abstract: Novel, uncured tapes are provided comprising a raw polymer mixture of HDPE, LLDPE or isotactic polypropylene, chlorosulfonated polyethylene rubber, a small amount of a filler or pigment and, optionally, a minor proportion of chlorinated polyethylene rubber or an elastomeric polymer. They are self-bonding when elongated at least about 50% and wrapped on a substrate, and possess various degrees of flame resistance depending on their composition.Type: GrantFiled: November 9, 1988Date of Patent: December 7, 1993Assignee: Polysar Rubber CorporationInventors: Eric G. Kent, Kyosaku Sato
-
Patent number: 4925715Abstract: The present invention relates to a tension wound roll of tape. The tape does not contain a separate adhesive layer but will bond to itself after being elongated by at least 50 percent and wrapped in overlapping layers. The tape of the invention will not self fuse when in roll form. The present tape is prepared from a minor proportion of a thermoplastic polymer and a major proportion of elastomeric polymer, and further contains a minor amount of an anti-blocking agent. The tape may be used in a wide variety of applications, for example, to repair leaks in hoses or pipes.Type: GrantFiled: June 7, 1989Date of Patent: May 15, 1990Assignee: Polysar LimitedInventor: Kyosaku Sato
-
Patent number: 4757110Abstract: Rubbery thermoplastic blends comprise an acrylonitrile-butadiene-styrene or a styrene-acrylonitrile polymer, a rubbery carboxylated butadiene-acrylonitrile polymer and a metal oxide or hydroxide.Type: GrantFiled: March 5, 1987Date of Patent: July 12, 1988Assignee: Polysar LimitedInventor: Kyosaku Sato
-
Patent number: 4626568Abstract: Rubber compositions are provided comprising per 100 parts by weight from about 65 to about 97 parts by weight of at least one rubber selected from the group consisting of natural rubber, synthetic cis-1,4-isoprene rubber, cis-1,4-butadiene rubber and brominated butyl rubber, and from about 3 to about 35 parts by weight of at least one carboxylated rubber selected from the group consisting of carboxylated styrene-butadiene rubber, carboxylated butadiene rubber, carboxylated isoprene rubber and carboxylated natural rubber, from about 20 to about 60 parts by weight per 100 parts by weight of rubbers of carbon black, from about 3 to about 25 phr of process oil and from about 1 to about 10 parts by weight per 100 parts by weight of rubber of metal oxide. The compositions are vulcanizable and the vulcanizates exhibit a good combination of vibration damping and noise insulating properties and are suitable for automotive engine mounts.Type: GrantFiled: August 8, 1985Date of Patent: December 2, 1986Assignee: Polysar LimitedInventors: Kyosaku Sato, Richard W. Liu, Seung-Tong Cheung
-
Patent number: 4619962Abstract: Thermoplastic compositions particularly suitable for fabrication of low permeability hoses are produced by mixing a crystalline polyamide and a carboxylated synthetic rubber as polymeric materials and as a first additive a member selected from halides of lithium, magnesium, calcium and zinc and as a second additive a member selected from oxides and hydroxides of magnesium, calcium, barium and zinc and the peroxides of calcium and zinc.Type: GrantFiled: April 12, 1985Date of Patent: October 28, 1986Assignee: Polysar LimitedInventor: Kyosaku Sato
-
Patent number: 4604420Abstract: Vulcanizable polymer compositions with improved scorch are provided comprising a carboxylated nitrile rubber or a carboxylated styrene-butadiene rubber, one or more polyvalent metal oxides and one or more alkali metal salts selected from the lithium, sodium and potassium salts of C.sub.12-18 -alkanoic acids.Type: GrantFiled: March 22, 1985Date of Patent: August 5, 1986Assignee: Polysar LimitedInventor: Kyosaku Sato
-
Patent number: 4525517Abstract: Vulcanizable polymer compositions with improved scorch are provided comprising a carboxylated nitrile rubber, one or more polyvalent metal oxides and one or more alkali metal salts selected from the lithium, sodium and potassium salts of C.sub.12-18 -alkanoic acids.Type: GrantFiled: February 13, 1984Date of Patent: June 25, 1985Assignee: Polysar LimitedInventor: Kyosaku Sato
-
Patent number: 4508867Abstract: Vulcanizable rubbery compositions, and a process for their production, comprise a polyamide, a synthetic rubbery polymer comprising (meth)acrylonitrile, .alpha., .beta.-unsaturated carboxylic acid and butadiene and as non-polymeric additives a halide of lithium, magnesium, calcium or zinc and as oxide a hydroxide of magnesium, calcium, barium or zinc or a peroxide of calcium or zinc and sulphur vulcanization active agents.Type: GrantFiled: November 7, 1983Date of Patent: April 2, 1985Assignee: Polysar LimitedInventor: Kyosaku Sato
-
Patent number: 4499213Abstract: An improved process is provided for the coagulation from the latex of a carboxylated styrenebutadiene polymer, the improvement being adjusting the pH of the latex to between about 6.5 and about 7.5 and adding an emulsifier mixture which contains, based on 100 parts by weight of polymer in the latex, from about 3 to about 6 parts by weight of the alkali metal salt of a fatty acid and from about 1.5 to about 3.5 parts by weight of the alkali metal salt of a rosin acid.Type: GrantFiled: September 12, 1983Date of Patent: February 12, 1985Assignee: Polysar LimitedInventor: Kyosaku Sato
-
Patent number: 4179421Abstract: A process, and the product thereof, is provided for the production of improved silica filled rubbery vulcanizates which process comprises mixing a vulcanizable hydrocarbyl polymer containing epoxy groups and silica, shearing the mixture at an elevated temperature, incorporating vulcanization active compounds and vulcanizing. The vulcanizates may be used where reinforced vulcanizates are required.Type: GrantFiled: March 6, 1978Date of Patent: December 18, 1979Assignee: Polysar LimitedInventors: Douglas C. Edwards, Kyosaku Sato
-
Patent number: 4152308Abstract: There is provided a process, and the product of that process, for the production of improved silica or calcium silicate filled rubbery vulcanizates which comprises the preparation of a mixture comprising a vulcanizable hydrocarbyl polymer containing hydroxyl groups, silica or calcium silicate and an organic acid or salt thereof, shearing the mixture at an elevated temperature, incorporating vulcanization active compounds and vulcanizing to produce the improved vulcanizates. Such improved vulcanizates may be used generally in the rubber industry.Type: GrantFiled: March 7, 1978Date of Patent: May 1, 1979Assignee: Polysar LimitedInventors: Douglas C. Edwards, Kyosaku Sato
-
Patent number: 4150015Abstract: A process is provided, and the product of that process, for the production of improved silica filled rubbery vulcanizates in which process a mixture is prepared comprising 100 parts by weight of a vulcanizable hydrocarbyl polymer containing hydroxyl groups, about 5 to about 100 parts by weight of silica and about 1 to about 10 parts by weight of magnesium oxide, the mixture is subjected to shearing at an elevated temperature, cooled, vulcanization active compounds are incorporated and then vulcanized. Such vulcanizates may be generally used especially where light-colored products are desired.Type: GrantFiled: March 7, 1978Date of Patent: April 17, 1979Assignee: Polysar LimitedInventors: Douglas C. Edwards, Kyosaku Sato
-
Patent number: 4150014Abstract: There is provided a process, and the product of that process, for the production of improved silica or calcium silicate filled rubbery vulcanizates in which a polymer containing hydroxyl groups is mixed with silica or calcium silicate and an amine, the mixture is subjected to shearing at an elevated temperature and vulcanized to yield the improved vulcanizates. Such vulcanizates may be used in place of carbon black vulcanizates.Type: GrantFiled: March 7, 1978Date of Patent: April 17, 1979Assignee: Polysar LimitedInventors: Douglas C. Edwards, Kyosaku Sato