-
公开(公告)号：JPH07330618A
公开(公告)日：1995-12-19
申请号：JP14553394
申请日：1994-06-03
Applicant: AGENCY IND SCIENCE TECHN
Inventor： ITO SHOJI , MATSUMARU YUJI , HIRANO TAKASHI , OHASHI SHINICHI
IPC: A61K31/785 , A61K49/00 , A61P9/00
Abstract: PURPOSE:To obtain a vascular embolic agent, excellent in the safety such as neither adverse side effect nor danger caused by organic solvents and suitably usable in intravascular operation. CONSTITUTION:This vascular embolic agent comprises an aqueous solution containing a heat-sensitive polymeric compound, constituted of at least one recurring unit of an N-substituted (meth)acrylamide represented by the formula (R is H or methyl; R is H, an alkyl or an alkoxyalkyl; R is an alkyl or an alkoxvalkyl) and having a molecular weight corresponding to 0.01-6.0dl/g intrinsic viscosity [eta] in a tetrahydrofuran solution at 27 deg.C and 10-37 deg.C transition temperature in water at 0.5-50wt.% concentration. A homopolymer of the N- substituted (meth)acrylamide, a copolymer of two or more thereof and a copolymer of the N-substituted (meth)acrylamide and other monomers are cited as the heat-sensitive polymeric compound. The vascular embolic agent is capable of emerging from a catheter, thereby increasing the temperature, convertible into a solid form and blocking blood vessels.
-
公开(公告)号：JPH06306350A
公开(公告)日：1994-11-01
申请号：JP12202093
申请日：1993-04-26
Applicant: AGENCY IND SCIENCE TECHN
Inventor： ITO SHOJI
Abstract: PURPOSE:To effectively separate adhering organisms without causing water pollution by applying, to the surface where the organisms grow, a separating agent comprising a specific heat-sensitive high-molecular compd. which is water- insol in the temp. range allowing the organisms to live and is water-sol. at a temp. lower than the above temp. range. CONSTITUTION:An agent for separating adhering organisms (e. g. algae, barnacles, or shellfishes) comprises a heat-sensitive high-molecular compd. (e. g. poly-N-acryloylpiperidine) which is insol. in water or sea water in the temp. range allowing the organisms to live and insol. at a temp. lower than the above temp. range and which has an intrinsic viscosity [eta[ at 27 deg.C in tetrahydrofuran of 0.01-6.0dl/g. The agent in the form of film or soln. is stuck to or printed on a desired place of an object, dipped in water or sea water at the phase transition temp. of the agent or higher to allow the organisms to adhere, cooled to lower than the phase transition temp., and thus partly or wholy dissolved, thereby separating the organisms.
-
公开(公告)号：JPH06306122A
公开(公告)日：1994-11-01
申请号：JP12202293
申请日：1993-04-26
Applicant: AGENCY IND SCIENCE TECHN
Inventor： ITO SHOJI
Abstract: PURPOSE:To obtain the compound which undergoes phase transition when subjected to thermal stimulation in water, by the radical polymerization of a specified vinyl compound. CONSTITUTION:The compound is obtained by the radical polymerization of a vinyl compound of formula I (wherein R is H or CH3) [e.g. N-2- isopropoxyethyl(meth)-acrylamide]. It consists of repeating units of formula II and has a molecular weight corresponding to an intrinsic viscosity [eta] of 0.01-6.0 in solution in tetrahydrofuran at 27.5 deg.C.
-
54.发明专利
公开(公告)号：JPH06145245A
公开(公告)日：1994-05-24
申请号：JP32254292
申请日：1992-11-06
Applicant: AGENCY IND SCIENCE TECHN
Inventor： ITO SHOJI , WATANABE YASUSHI , ASAI MICHIHIKO
Abstract: PURPOSE:To obtain the subject polymer compound useful as light screening material, temperature sensor, etc., having a given intrinsic viscosity efficiently and in high yield by radically polymerizing a specific vinyl compound. CONSTITUTION:N-2-(1,3-Dioxolan-2-yl)ethylacrylamide of formula I is radically polymerized to give the objective polymer compound comprising a repeating unit of formula II, having a molecular weight corresponding to 0.01-6.0 intrinsic viscosity [eta]in an aqueous solution at 27 deg.C. The compound of formula I is a new substance and is obtained by reacting acrylic acid with 2-(2- aminoethyl)-1,3-dioxolan.
-
公开(公告)号：JPH06145166A
公开(公告)日：1994-05-24
申请号：JP32254192
申请日：1992-11-06
Applicant: AGENCY IND SCIENCE TECHN
Inventor： ITO SHOJI , WATANABE YASUSHI , ASAI MICHIHIKO
IPC: C07D317/28 , C08F20/52 , C08F120/58
Abstract: PURPOSE:To obtain a new compound useful as a raw material monomer for heat-sensitive polymer compound such as light screening material, temperature sensor, adsorbent, toy, interior, printing agent, display, separating film or mechanochemical material. CONSTITUTION:N-2-(1,3-Dioxolan-2-yl)ethylacrylamide of formula I. The compound of formula I is obtained by reacting acrylic acid chloride of formula II with 2-(2-aminoethyl)-1,3-dioxolan of formula III at and triethylamine 0-10 deg.C.
-
Patent Agency Ranking56.发明专利
公开(公告)号：JPH04114011A
公开(公告)日：1992-04-15
申请号：JP23415890
申请日：1990-09-03
Applicant: AGENCY IND SCIENCE TECHN , SAN NOPCO KK
Inventor： ITO SHOJI , HAYASHI YOSHIHIRO , IGAWA HIDEAKI
Abstract: PURPOSE:To obtain the subject polymer having high strength and losing the water-solubility with heat by adding a cationic surfactant to an aqueous solution of a specific acrylamide-type vinyl compound and radically polymerizing the monomer at a specific temperature. CONSTITUTION:The objective polymer having a molecular weight corresponding to an intrinsic viscosity of 2-6 at 27 deg.C as a THF solution can be produced by adding a cationic surfactant or an anionic surfactant at a concentration above the critical micelle concentration to an aqueous solution of an acrylamide- type vinyl compound (e.g. acrylamide) capable of forming a homopolymer exhibiting thermally reversible hydrophilic-hydrophobic dissolution characteristics and radically (co)polymerizing the monomer at a temperature above the cloud point of the resultant aqueous solution of (co)polymer. The above surfactant is preferably trimethylstearylammonium chloride or sodium dodecylbenzenesulfonate.
-
公开(公告)号：JPH0482886A
公开(公告)日：1992-03-16
申请号：JP19524590
申请日：1990-07-24
Applicant: AGENCY IND SCIENCE TECHN
Inventor： ITO SHOJI , HIRASA OKIHIKO , FUJISHIGE NORINAGA , YAMAUCHI AIZO
IPC: C07D317/28 , C08F20/52 , C08F20/58
Abstract: NEW MATERIAL:N-Methyl-N-2-(1,3-dioxolan-2-yl)ethylacrylamide expressed by formula I. USE:A raw material monomer for heat-sensitive polymer compounds, utilizable as light shielding substances, temperature sensors, adsorbents, toys, interiors, printing agents, displays, separation membranes and mechanochemical materials and capable of causing phase transition in water and alcoholic solvents. PREPARATION:Acryloyl chloride expressed by formula II is reacted with N- methyl-2-aminoethyl-1,3-dioxolane expressed by formula III and triethylamine in a solvent at 0-10 deg.C.
-
公开(公告)号：JPH0481408A
公开(公告)日：1992-03-16
申请号：JP19524690
申请日：1990-07-24
Applicant: AGENCY IND SCIENCE TECHN
Inventor： ITO SHOJI , HIRASA OKIHIKO , FUJISHIGE NORINAGA , YAMAUCHI AIZO
Abstract: PURPOSE:To obtain the subject new heat-sensitive high polymer compound having specific intrinsic viscosity, capable of phase transfer in water or alcohol solvent and used for temperature sensor, etc., by subjecting a specific acrylic amide derivative having 1,3-dioxolane ring to radical polymerization. CONSTITUTION:N-Methyl-N-2-(1,3-dioxolane-2-yl)ethylacryl amide prepared by reacting N-methyl-2-aminoethyl-1,3-dioxolane with acrylic acid chloride in the presence of triethylamine in benzene and expressed by formula I is polymerized in the presence of a radical polymerization initiator such as azobisisobutyronitrile (AIMN) in a solvent such as benzene while heating to provide the aimed heat sensitive high polymer compound consisting of recurring units expressed by formula II and having molecular weight in which intrinsic viscosity [eta] at 27 deg.C in an aqueous solution corresponds to 0.01-6.0.
-
公开(公告)号：JPH02147609A
公开(公告)日：1990-06-06
申请号：JP30209788
申请日：1988-11-29
Applicant: AGENCY IND SCIENCE TECHN
Inventor： ITO SHOJI , HIRASA OKIHIKO , FUJISHIGE NORINAGA , YAMAUCHI AIZO
Abstract: PURPOSE:To obtain a new thermally reversible hydrophilic-hydrophobic polymer compd. which is reversibly water-soluble at a low temp. range and water- insoluble at a higher temp. range and have a transition temp. different from conventional products by radical-polymerizing N-(2-methoxyethyl)N-n- propylacrylamide. CONSTITUTION:This thermally reversible hydrophilic-hydrophobic polymer compd. consists of a repeating units of formula I and has an MW corresponding to an intrinsic viscosity [eta] of a tetrahydrofulan soln. at 27 deg.C of 0.01-6.0. This polymer compd. is obtd. by radical-polymerizing a vinyl compd. of formula II. In addition, this polymer compd. is reversibly soluble in water at a lower temp. range and insoluble in water at a higher temp. range. The transition temp. changes in accordance with polymn. condition and is usually in the range of about 11-14 deg.C. This polymer compd. can be used as a light insulating body, a temp. sensor, an adsorbent, a toy, an interior, a display, etc.
-
60.发明专利
公开(公告)号：JPH0291286A
公开(公告)日：1990-03-30
申请号：JP23798088
申请日：1988-09-22
Applicant: AGENCY IND SCIENCE TECHN
Inventor： ITO SHOJI , NAKAO YUKIMICHI , MIZOGUCHI KENSAKU , YAMAUCHI AIZO , KOBAYASHI TOSHIHIRO
Abstract: PURPOSE:To obtain a dyed material rich in unconventional high-class feeling by printing a textile product with a resist size consisting of a thermally reversible high polymer and then dipping the textile product in a noble metal hydrosol containing a cationic surfactant above the phase transition temperature essential to the afore-mentioned resist size. CONSTITUTION:A textile product consisting of natural, synthetic fiber, etc., is printed with a resist size consisting of a thermally reversible high polymer, i.e., a high polymer (e.g., polyN-isopropylacrylamide) capable of phase transition from a hydrophilic (low temperature) to a hydrophobic phases (high temperature) with temperature in a state coexisting with water and the resultant textile product is then dipped in a noble metal hydrosol containing a cationic surfactant above the phase transition temperature essential to the afore-mentioned resist size to dye parts other than the above-mentioned printed part. The afore- mentioned size is subsequently removed with cold water below the phase transition temperature. The textile product is dyed to brown, violet or red color in the case of gold hydrosol and to yellow color in the case of silver hydrosol.
-
-
-
-
-
-
-
-
-
Search Results
72
records
(took 0.033 seconds)
