Patents Assigned to Nobuo Nakabayashi
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Publication number: 20060217276Abstract: Contact lens wetting solutions for reducing friction between the contact lens and ocular tissues, and maintaining such effect for a long time, are disclosed. The wetting solution is composed only of a particular ratio of a lubricant composed of copolymer (A) obtained by polymerizing a monomer composition comprising 2-(meth)acryloyloxyethyl phosphorylcholine and alkyl(meth)acrylate, a buffer, an inorganic chloride, a preservative, a chelating agent, and water. The copolymer (A) has a weight average molecular weight of 100,000 to 1,000,000, and satisfies the formula 80?N×R?240, provided that 4?N?18 and 10%?R?60%, wherein N stands for the carbon number of the alkyl group in monomer Y constituting copolymer (A), and R stands for a molar fraction of the unit derived from monomer Y with respect to the sum of the units derived from monomers X and Y.Type: ApplicationFiled: June 8, 2006Publication date: September 28, 2006Applicants: NOF Corporation, Nobuo Nakabayashi, Kazuhiko IshiharaInventors: Motohiro Mitani, Ryota Ando, Hirofumi Irie, Ken Suzuki, Nobuo Nakabayashi, Kazuhiko Ishihara
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Patent number: 5879663Abstract: There is provided a dental composition for relieving dentin hypersensitivity, which occludes dentinal tubules having an opening on the surface of dentin to relieve dentin hypersensitivity thereby to give an immediate relieving effect and to maintain the relieving effect for a long time.The dental composition for relieving dentin hypersensitivity, which comprises (A) a low molecular weight compound which can produce a precipitate which is hardly soluble in water when it reacts with a calcium compound, or which comprises the above component (A), (B) a calcium compound and/or (C) an aqueous polymer emulsion having a particle size smaller than that of a dentinal tubule and forming an agglomerate or a hardly soluble gel larger than the diameter of a dentinal tubule when it reacts with a calcium compound.Type: GrantFiled: August 7, 1996Date of Patent: March 9, 1999Assignees: Sun Medical Co., Ltd., Nobuo NakabayashiInventors: Nobuo Nakabayashi, Takashi Yamamoto, Yasukazu Saimi, Masami Arata, Harumi Tanaka
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Patent number: 5766328Abstract: There is provided a dental composition for relieving dentin hypersensitivity comprising (A) an aqueous emulsion component which contains, as emulsion particles, polymer particles having a diameter smaller than that of a dentinal tubule and forming an agglomerate larger than the diameter of a dentinal tubule when they react with a calcium compound, and (B) a water-soluble organic acid component or a water-soluble salt component thereof, a calcium salt of the organic acid being insoluble or hardly soluble in water. Using this composition, dentinal tubules open to the surface of dentin are occluded to relieve dentin hypersensitivity immediately and lastingly.Type: GrantFiled: January 24, 1997Date of Patent: June 16, 1998Assignees: Sun Medical Co., Ltd., Nobuo NakabayashiInventors: Nobuo Nakabayashi, Takashi Yamamoto, Yasukazu Saimi, Masami Arata, Harumi Tanaka
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Patent number: 5629361Abstract: An emulsion of a polymer, in which the polymer comprises (a) a recurring unit derived from a (meth)acrylate and (b) a recurring unit derived from a vinyl compound having a group of --SO.sub.3 R in which R is a hydrogen atom, an alkali metal atom or ammonium ion. The emulsion forms a film on an adherend to decrease the infiltration into the adherend, exhibits an adhesion force to a hydroxyapatite structure, a cement, a metal or a mineral when it is applied thereto to form a film by only drying around room temperature without washing it with water, and exhibits excellent affinity to a radical-polymerizable acrylic resin composition.Type: GrantFiled: May 31, 1995Date of Patent: May 13, 1997Assignees: Mitsui Petrochemical Industries, Ltd., Nobuo NakabayashiInventors: Nobuo Nakabayashi, Kazuhiko Ishihara, Yasukazu Saimi
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Patent number: 5554669Abstract: An emulsion of a polymer, in which the polymer comprises (a) a recurring unit derived from a (meth)acrylate and (b) a recurring unit derived from a vinyl compound having a group of --SO.sub.3 R in which R is a hydrogen atom, an alkali metal atom or ammonium ion. The emulsion forms a film on an adherend to decrease the infiltration into the adherend, exhibits an adhesion force to a hydroxyapatite structure, a cement, a metal or a mineral when it is applied thereto to form a film by only drying around room temperature without washing it with water, and exhibits excellent affinity to a radical-polymerizable acrylic resin composition.Type: GrantFiled: October 21, 1994Date of Patent: September 10, 1996Assignees: Mitsui Petrochemical Industries, Ltd., Nobuo NakabayashiInventors: Nobuo Nakabayashi, Kazuhiko Ishihara, Yasukazu Saimi
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Patent number: 5468475Abstract: The cosmetic composition of this invention which is a 2-methacryloyloxyethylphosphorylcholine polymer (Poly MPC) in a preferable amount of 0.001% to 10% by weight based on the total weight of the cosmetic composition. The cosmetic composition can repair damage to the skin and hair, such as dryness, loss of luster, etc. and enhance the moisture preservation capability thereof. It also has a good feel when applied.Type: GrantFiled: November 15, 1993Date of Patent: November 21, 1995Assignees: Pola Chemical Industries Inc., Nobuo NakabayashiInventors: Masao Shaku, Sayuri Ohkura, Hideo Kuroda, Ai Kano, Nobuo Nakabayashi
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Patent number: 5264215Abstract: Disclosed is a bone cement composition comprising polyalkyl methacrylate derived from methacrylate having an alkyl group of 1-4 carbon atoms, hydroxyapatite, alkyl methacrylate having an alkyl group of 1-4 carbon atoms, 4-(2-methacryloyloxyethyl)trimellitic acid or anhydride thereof, and a polymerization initiator. Also disclosed are a cured product of the composition, an implant material using the composition and a process for the preparation of the implant material.Type: GrantFiled: October 19, 1990Date of Patent: November 23, 1993Assignees: Nobuo Nakabayashi, Mitsui Petrochemical Industries, Ltd., Asahi Kogaku Kogyo Kabushiki KaishaInventors: Nobuo Nakabayashi, Kazuhiko Ishihara, Takashi Yamamoto
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Patent number: 5243006Abstract: The acrylic copolymer of the present invention is an acrylic copolymer comprising recurring units derived from a (meth)acrylic ester compound and recurring units derived from a vinyl compound having --SO.sub.3 R (wherein R represents a hydrogen atom or a lower alkyl group) or having an acceptable salt thereof, wherein at least a part of ester groups of the (meth)acrylic ester compound is substituted by a group having recurring units derived from a (meth)acrylic ester. The present invention further provides a process for the preparation of the acrylic copolymer and use application of the acrylic copolymer utilizing its adhesion properties.Type: GrantFiled: May 31, 1991Date of Patent: September 7, 1993Assignees: Nobuo Nakabayashi, Mitsui Petrochemical Industries, Ltd.Inventors: Nobuo Nakabayashi, Kazuhiko Ishihara, Takashi Yamamoto, Toru Kinoshita