Patents by Inventor Koichiro Sanji
Koichiro Sanji 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: 5041481Abstract: An adhesion-improver which comprises a reaction product of an amino compound having a primary and/or secondary amino group in the molecule or a modified amino compound obtained by modifying the amino compound with a compound having an epoxy group, and a carbonyl compound, particularly a dicarbonyl compound of the formula ##STR1## wherein R.sup.1 and R.sup.2 are the same or different and are each an alkyl having 1 to 16 carbon atoms, an aryl having 6 to 12 carbon atoms or an alkoxy having 1 to 4 carbon atoms, R.sup.3 is a hydrocarbon group having one or more carbon atoms, and n is 0 or 1, is used to prepare a curable composition such as an adhesive, sealing agent, paint or pourable compound.Type: GrantFiled: October 23, 1990Date of Patent: August 20, 1991Assignee: Sunstar Giken Kabushiki KaishaInventors: Masaru Sugimori, Tadao Kunishige, Koichiro Sanji
-
Patent number: 4981987Abstract: An adhesion-improver which comprises a reaction product of an amino compound having a primary and/or secondary amino group in the molecule or a modified amino compound obtained by modifying the amino compound with a compound having an epoxy group, and a carbonyl compound, particularly a dicarbonyl compound of the formula: ##STR1## wherein R.sup.1 and R.sup.2 are the same or different and are each an alkyl having 1 to 16 carbon atoms, an aryl having 6 to 12 carbon atoms or an alkoxy having 1 to 4 carbon atoms, R.sup.3 is a hydrocarbon group having one or more carbon atoms, and n is 0 or 1, which is useful for improving adhesion of curable compositions such as adhesives, sealing agents, paints and pourable compounds, and a curable composition comprising a conventional main component and the adhesion-improver as set forth above which has excellent adhesion and curing characteristics.Type: GrantFiled: March 5, 1986Date of Patent: January 1, 1991Assignee: Sunstar Giken Kabushiki KaishaInventors: Masaru Sugimori, Tadao Kunishige, Koichiro Sanji
-
Patent number: 4728684Abstract: A polyurethane adhesive comprising(a) a thermoplastic polyester urethane rubber which is grafted with at least one of the compounds selected from the group consisting of acrylic acid, an acrylic ester, methacrylic acid and a methacrylic ester,(b) a chlorinated rubber, and(c) an isocyanate compound as a crosslinking agent, and optionally(d) a polyoxyalkylene ether polyol having 2 or more ether groups in the molecule, and/or(e) a rosin resin and/or a rosin resin derivative,which is an organic solvent solution type, and exhibits excellent adhesion particularly in case that at least one of the substances to be adhered is a soft polyvinyl chloride sheet or film.Type: GrantFiled: January 27, 1986Date of Patent: March 1, 1988Assignee: Sunstar Giken Kabushiki KaishaInventors: Toshio Kadowaki, Masahito Mori, Masaaki Soh, Koichiro Sanji
-
Patent number: 4694093Abstract: A polyurethane resin composition, which comprises (A) a urethane prepolymer composition containing 0.5 to 15.0% by weight of an active isocyanate group which is prepared by reacting a polyoxyalkylene ether polyol and/or polyester polyol and an excess amount of a polyisocaylante compound, and (B) as an adhesion-promoting agent 0.05 to 5.0% by weight of a reaction product of an amine compound containing at least one alkoxysilyl group of the formula: ##STR1## wherein R.sup.1 and R.sup.2 are the same or different and are each a alkyl having 1 to 4 carbon atoms, and n is 0, 1 or 2, and an excess amount of a carbonyl compound. Said polyurethane resin composition has excellent adhesion properties and can show also excellent adhesiveness to metals which are hardly adhered with the conventional compositions and is useful as an adhesive, sealant and coating agent in various technical fields.Type: GrantFiled: October 2, 1985Date of Patent: September 15, 1987Assignee: Sunstar Giken Kabushiki KaishaInventors: Masaru Sugimori, Koichiro Sanji
-
Patent number: 4555561Abstract: A polyurethane resin composition, which comprises (A) a urethane prepolymer composition containing 0.5 to 15.0% by weight of an active isocyanate group which is prepared by reacting a polyoxyalkylene ether polyol and/or polyester polyol and an excess amount of a polyisocaylante compound, and (B) as an adhesion-promoting agent 0.05 to 5.0% by weight of a reaction product of an amine compound containing at least one alkoxysilyl group of the formula: ##STR1## wherein R.sup.1 and R.sup.2 are the same or different and are each a alkyl having 1 to 4 carbon atoms, and n is 0, 1 or 2, and an excess amount of a carbonyl compound. Said polyurethane resin composition has excellent adhesion properties and can show also excellent adhesiveness to metals which are hardly adhered with the conventional compositions and is useful as an adhesive, sealant and coating agent in various technical fields.Type: GrantFiled: August 24, 1984Date of Patent: November 26, 1985Assignee: Sun Star Giken Kabushiki KaishaInventors: Masaru Sugimori, Koichiro Sanji
-
Patent number: 4532273Abstract: A two-part adhesive which comprises(i) as the main ingredient an emulsion consisting essentially of (a) an aqueous emulsion of a polymer or copolymer obtained from an essential monomer of an adduct of a tertiary amino group-containing acrylic or methacrylic acid ester and an epihalohydrin, (b) a tackifier resin selected from the group consisting of a petroleum hydrocarbon resin, a phenolic resin, a terpene resin, a rosin resin, a coumarone resin, and a coumarone-indene resin, and (c) an epoxy compound containing two or more epoxy groups in the molecule; and(ii) a curing agent selected from a primary or secondary amino group-containing compound. The adhesive is particularly useful for preparing automobile interior decorations, such as inside trims (e.g. doors, pillars), instrument panels, formed ceiling, and console box.Type: GrantFiled: May 21, 1984Date of Patent: July 30, 1985Assignee: Sunstar Giken Kabushiki KaishaInventors: Toshio Kadowaki, Koichiro Sanji
-
Patent number: 4501853Abstract: An improved curable epoxy resin composition comprising an epoxy resin and vulcanized rubber particles having a particle size of 0.5 to 30.mu. which are obtained by vulcanizing a dispersion of fine particles of a liquid rubber incompatible with the epoxy resin in the epoxy resin with a vulcanizing agent, and a method for the preparation of the same. The curable epoxy resin composition has excellent flexibility, mechanical strength and peel strength when cured with a curing agent, and is useful as an adhesive, coating material or molding material.Type: GrantFiled: September 29, 1982Date of Patent: February 26, 1985Assignee: Sunstar Giken Kabushiki KaishaInventors: Masaru Sugimori, Koichiro Sanji, Hirohide Tomoyasu, Toshimori Sakakibara