公开(公告)号：JPS62277414A

公开(公告)日：1987-12-02

申请号：JP12049786

申请日：1986-05-26

Applicant: AGENCY IND SCIENCE TECHN

Inventor： ITO SHOJI ,  MIZOGUCHI KENSAKU ,  SUDA MASAO

IPC: B01J20/28 ,  B01D71/58 ,  B01J20/26 ,  C08F20/52 ,  C08F20/58 ,  C08L33/24

Abstract: PURPOSE:To provide the titled material composed of an aqueous solution of a poly[N-(dimethoxyethyl)-N-methylacrylamide], reversibly taking a water-soluble state at low temperature and water-insoluble state at high temperature and useful as a light-shielding material, temperature sensor, heat-sensitive switch, toy, adsorptive separation material, etc. CONSTITUTION:The objective material is composed essentially of an aqueous solution of poly(N-(2,2-dimethoxyethyl)-N-methylacrylamide)(preferably having an intrinsic viscosity [eta] of 0.01-6.0 in methanol solution at 30 deg.C). The concentration of the aqueous solution is preferably >=0.01%.

公开(公告)号：JPS6291509A

公开(公告)日：1987-04-27

申请号：JP23077585

申请日：1985-10-16

Applicant: AGENCY IND SCIENCE TECHN

Inventor： ITO SHOJI ,  MIZOGUCHI KENSAKU ,  SUDA MASAO

IPC: C08F20/58 ,  C08F20/52 ,  C08F120/58

Abstract: PURPOSE:To obtain the titled thermoreversible polymer which is soluble in water at low temperatures while insoluble in water at high temperatures and is suitable for temperature sensors, light-screening bodies, etc., by radical- polymerizing N-ethoxyethyl(meth)acrylamide. CONSTITUTION:The purpose thermoreversibly hydrophilic acid hydrophobic polymer of formula II (wherein n>=2) is obtained by radical-polymerizing N- ethoxyethyl(meth)acrylamide of formula I (wherein R1 is H or methyl). As a process for polymerizing this compound, a solution polymerization process is usually preferable, and one comprising dissolving the compound of formula I in a solvent (e.g., benzene) and irradiating the solution with a radiation or heating it in the presence of a radical polymerization initiator can be adopted, for example. The compound of formula I can be produced by, for example, reacting (meth)acryloyl chloride with 2-ethoxyethylamine and triethylamine in benzene.

公开(公告)号：JP2001049074A

公开(公告)日：2001-02-20

申请号：JP2000183492

申请日：2000-06-19

Applicant: AGENCY IND SCIENCE TECHN

Inventor： ITO SHOJI

IPC: C02F1/54 ,  C08F220/54 ,  C08L33/24 ,  C09K3/00

Abstract: PROBLEM TO BE SOLVED: To obtain a novel reversible heat-sensitive water-releasing agent having such a unique property that, although the agent is soluble in water at a specific temperature of lower, at a higher temperature than the specific temperature, an aqueous solution of the agent exhibits a viscosity increase, gels while keeping its initial form, shrinks in size through releasing water and is subsequentry solidified, and the resultant solid turns back to an aqueous solution when cooled to a temperature lower than the specific temperature. SOLUTION: This agent comprises a water solution containing a copolymer which consists of a constituent unit derived from a monomer which, when homo- polymerized, forms a polymer exhibiting a reversible hydrophilic-hydrophobic change with temperature and a constituent unit derived from an ethylenic unsaturated compound having both a hydrophilic group and a hydrophobic group, wherein the content of the latter constituent unit is 0.001-10 mol% of the total amount of the copolymer and the weight average molecular weight is 1,000,000-10,000,000.

公开(公告)号：JP2001019938A

公开(公告)日：2001-01-23

申请号：JP19091499

申请日：1999-07-05

Applicant: AGENCY IND SCIENCE TECHN

Inventor： ITO SHOJI

IPC: C09K3/00 ,  C08F2/24 ,  C08F220/54 ,  C08F290/06

Abstract: PROBLEM TO BE SOLVED: To provide a heat-sensitive gel micro-bead producible without using a step to remove a cationic or anionic surfactant from a polymerization product and provide its production process. SOLUTION: The objective micro-bead is composed of a copolymer containing (A) a monomer unit forming a heat-sensitive polymer by polymerization and (B) a crosslinkable monomer unit as constituent units and has particle diameter range of 10-1,000 nm. It can be produced by adding a surface-active monomer having hydrophilic group and hydrophobic group to an aqueous solution containing a monomer forming a heat-sensitive polymer by polymerization and a crosslinkable monomer to a concentration above the critical micelle concentration and copolymerizing the monomers in micelle in the presence of a radical polymerization initiator at a temperature above the transition temperature of the produced copolymer.

公开(公告)号：JPH1180701A

公开(公告)日：1999-03-26

申请号：JP24247197

申请日：1997-09-08

Applicant: AGENCY IND SCIENCE TECHN

Inventor： ITO SHOJI

IPC: C08J3/16 ,  B01J13/14 ,  C08F2/10 ,  C08F265/06 ,  C08J3/14 ,  C09K3/00

Abstract: PROBLEM TO BE SOLVED: To provide a method for producing a pH-sensitive and heat-sensitive microbead, sensitive to both pH and heat and capable of changing the grain diameter according to the changes thereof. SOLUTION: This pH-sensitive and heat-sensitive microbead is produced by further adding a cationic surfactant or an anionic surfactant at the critical micelle concentration thereof to an aqueous solution containing a mixture of 1-40 mol.% at least one polymer selected from polyacrylic acid and polymethacrylic acid with 99-60 mol.% at least one monomer selected from an unsaturated amide represented by the formula (R is hydrogen atom or methyl group; at least either one of R and R is an alkyl group or an alkoxyalkyl group and the remaining other is hydrogen atom) and a cross- linking agent and carrying out the intramicellar reaction at a temperature of the cloud point or above thereof.

公开(公告)号：JPH06145646A

公开(公告)日：1994-05-27

申请号：JP32254392

申请日：1992-11-06

Applicant: AGENCY IND SCIENCE TECHN

Inventor： ITO SHOJI ,  WATANABE YASUSHI ,  ASAI MICHIHIKO

IPC: C08F220/56 ,  C08F22/10 ,  C08F220/10 ,  C08F220/54 ,  C08F220/60 ,  C08L33/24 ,  C08L33/26 ,  C09K3/00

Abstract: PURPOSE:To obtain the subject copolymer comprising a copolymer produced from acryloylbenzhydrazide and dimethylacrylamide in a specific ratio, causing a phase transfer by a thermal irritation in water, having a chelating ability, and useful for light-screening articles, temperature sensors, etc. CONSTITUTION:The objective copolymer comprises N-acryloylbenzhydrazide-N, N-dimethylacrylamide copolymer wherein the content of the N- acryloylbenzhydrazide is 7-18mol.%. The copolymer is obtained by radically copolymerizing N-acryloylbenzhydrazide with N,N-dimethylacrylamide in the presence of a polymerization initiator such as benzoyl peroxide.

公开(公告)号：JPH02160037A

公开(公告)日：1990-06-20

申请号：JP31490888

申请日：1988-12-15

Applicant: AGENCY IND SCIENCE TECHN ,  NIPPON KAYAKU KK

Inventor： MORISHITA YASUYOSHI ,  HIRASA OKIHIKO ,  ITO SHOJI ,  YAMAUCHI AIZO

IPC: B01J13/00 ,  B01J20/26 ,  C08F20/56 ,  C08L33/26

Abstract: PURPOSE:To obtain the temp.-sensitive gel in the form of a fine powder, thin film, etc., having excellent responsiveness by irradiating the high-polymer mold ing formed by the water insoluble salt of a high-polymer electrolyte to cover the surface of the temp.-sensitive high polymer with gamma rays or electron rays. CONSTITUTION:A gel preparing liquid contg. the temp.-sensitive high polymer of an N-substd. acrylamide high polymer, etc., and the water soluble salt of the high-polymer electrolyte, such as sodium alginate, is introduced into a solid bath of an aq. water soluble metal salt soln. of barium chloride, calcium chlo ride, etc., which form the insoluble salt with this high-polymer electrolyte. Then the water insoluble salt of the high-polymer electrolyte covers the surface of the temp. sensitive high polymer and forms the high-polymer molding which hardly exhibits tackiness. This molding is irradiated with the gamma rays or electron rays without being dried to dry the temp.-sensitive high polymer. The gel having the excellent responsiveness with the reversible form change, etc., in response with a temp. change in the presence of water is obtd. in this way.

公开(公告)号：JPH02129160A

公开(公告)日：1990-05-17

申请号：JP28218388

申请日：1988-11-08

Applicant: AGENCY IND SCIENCE TECHN

Inventor： ITO SHOJI ,  HIRASA OKIHIKO ,  FUJISHIGE NORINAGA ,  YAMAUCHI AIZO

IPC: C07C233/20 ,  C08F20/00 ,  C08F20/52 ,  C08F20/58

Abstract: NEW MATERIAL:N-(2-Methoxyethyl)-N-ethylacrylamide of the formula. USE:Useful as a raw material monomer for hydrophilicity-hydrophobicity thermally reversible type polymeric compounds capable of being utilized for light- shielding articles, temperature sensors, adsorbents, tools, interiors, mechanochemical materials, dyeing-preventing agents, separating agents, etc. PREPARATION:Acryloyl chloride, N-(2-methoxyethyl)ethylamine and triethylamine are reacted with each other in a solvent such as benzene or acetone at 0-10 deg.C to provide the component of the formula. The vinylic compound of the formula is a colorless liquid, soluble in water, methyl alcohol, ethyl alcohol, acetone, THF, chloroform, carbon tetrachloride, benzene, etc., and insoluble in n-hexane and n-heptane. The radical polymerization of the compound of the formula gives a hydrophilicity-hydrophobicity thermally reversible polymeric compound.

公开(公告)号：JPH01249815A

公开(公告)日：1989-10-05

申请号：JP7967288

申请日：1988-03-31

Applicant: AGENCY IND SCIENCE TECHN

Inventor： ITO SHOJI

IPC: C08F120/58 ,  C08F20/52 ,  C08F20/58

Abstract: PURPOSE:To obtain a novel polymer, composed of a specified repeating unit, reversibly soluble in water in a low temperature range and insoluble in a high temperature range and useful for shade bodys, thermosensors, adsorbents, toys, etc., by radically polymerizing a specified vinyl compound. CONSTITUTION:N,N-Di(2-methoxyethyl)acrylamide expressed by formula I is radically polymerized to provide the objective compound composed of a repeating unit represented by formula II and having a molecular weight corresponding to 0.01-6.0 intrinsic viscosity [eta] at 27 deg.C in THF solution.

公开(公告)号：JPH0199871A

公开(公告)日：1989-04-18

申请号：JP25751787

申请日：1987-10-13

Applicant: AGENCY IND SCIENCE TECHN

Inventor： ITO SHOJI ,  MIZOGUCHI KENSAKU ,  YAMAUCHI AIZO ,  SHIOZAWA KAZUO

IPC: B41M1/30

Abstract: PURPOSE:To draw a pattern with excellent sharpness, by forming the pattern on a surface containing high-temp. hydrophobic heatreversible polymer compound using a coloring material composite of which temp. is kept higher than phase transition temp. of the polyer compound. CONSTITUTION:A pattern is drawn on a surface of polymer composite containing high-temp. hydrophobic heat-reversible polymer compound by means of a coloring material composite of which temp. is kept higher than phase transition term. of the polyer compound. Alternately, the temp. of a polymer composite surface containing high-temp. hydrophobic heat-reversible polymer compound is kept higher than phase transition temp. of the heat-reversible polymer compound and a pattern is drawn by means of a coloring material composite. The high-temp. hydrophobic heat-reversible polymer compound is preferably one mainly containing polyvinyl methylether with more than 50 deg.C phase transition temp. and polyacrylamide derivative.