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1. 发明专利

CA2170186A1 PTC ELEMENT AND PROCESS FOR PRODUCING THE SAME 未知
公开(公告)号：CA2170186A1
公开(公告)日：1996-08-29
申请号：CA2170186
申请日：1996-02-23
申请人： UNITIKA LTD
发明人： KAJIMARU HIROSHI , ASAMI KEIICHI , IWAYA YOSHIAKI , ECHIGO YOSHIAKI , ITO AKIRA
IPC分类号： H01C7/02 , H01C17/065 , H01C17/00
摘要： A PTC element comprising a conductive sheet of a crystalline polyolefin matrix and a conductive filler, having provided on both sides thereof an electrode of a metallic foil, the PTC element having a resistivity at 20.degree.C (P20) of not more than 1.8 .OMEGA. than 2.0 x 106 .OMEGA. ¢Ta (.degree.C) - Tb (.degree.C)! of not greater than 10.degree.C, wherein Ta (.degree.C) is a temperature at which the resistivity is 106 times the resistivity at 20.degree.C (P20) and Tb (.degree.C) is a temperature at which the resistivity is 10 times the resistivity at 20.degree.C (P20). The PTC element is produced by a process comprising mixing a crystalline polyolefin and a conductive filler, molding the mixture into a conductive sheet, press bonding under heat a metallic foil to both sides of the conductive sheet, and repeatedly subjecting the conductive sheet to a heating and cooling cycle consisting of heating at a temperature of not lower than (the melting point of the crystalline polyolefin minus 5.degree.C) and then cooling to a temperature lower than (the melting point of the crystalline polyolefin minus 5.degree.C). The PTC elements exhibit an extremely low resistivity at 20.degree.C and a high resistivity at a peak temperature, showing a very steep increase in resistance in a narrow temperature range.

2. 发明专利

CA2115334A1 FILM FORMING SOLUTION, POROUS FILM OBTAINED THEREFROM AND COATED MATERIAL WITH THE POROUS FILM 未知
公开(公告)号：CA2115334A1
公开(公告)日：1994-08-11
申请号：CA2115334
申请日：1994-02-09
申请人： UNITIKA LTD
发明人： TOMIOKA ISAO , SAITO MINORU , YAMADA HIROSHI , IWAYA YOSHIAKI , ECHIGO YOSHIAKI
IPC分类号： C08G73/10 , C09D179/08 , H05K1/03 , B32B15/08 , C08L79/08 , B01D71/64
摘要： A film forming solution which does not require aprotic polar solvents, a porous film of poly(4,4'oxydiphenylenepyromellitimide) obtained from the film forming solution which has excellent heat and chemical resistances, which is controllable in terms of porosity and pore size of the film and which has excellent electrical characteristics, and a coated material where the porous film is formed on a base material. Particularly, a film forming solution of a precursor of poly(4,4'-oxydiphenylenepyromellitimide) and a mixture of at least three solvents which are poor solvents for the precursor when each solvent is used alone, a porous film of poly(4,4'-oxydiphenylenepyromellitimide) obtained from the film forming solution and a coated material where the porous film is formed on a base material.

3. 发明专利

DE69419329T2 未知
公开(公告)号：DE69419329T2
公开(公告)日：1999-11-25
申请号：DE69419329
申请日：1994-02-10
申请人： UNITIKA LTD
发明人： TOMIOKA ISAO , SAITO MINORU , IWAYA YOSHIAKI , ECHIGO YOSHIAKI
IPC分类号： C08G73/10 , C09D179/08 , H05K1/03
摘要： A film forming solution which does not require aprotic polar solvents, a porous film of poly(4,4'-oxydiphenylenepyromellitimide) obtained from the film forming solution which has excellent heat and chemical resistances, which is controllable in terms of porosity and pore size of the film and which has excellent electrical characteristics, and a coated material where the porous film is formed on a base material. Particularly, a film forming solution of a precursor of poly(4,4'-oxydiphenylenepyromellitimide) and a mixture of at least three solvents which are poor solvents for the precursor when each solvent is used alone, a porous film of poly(4,4'-oxydiphenylenepyromellitimide) obtained from the film forming solution and a coated material where the porous film is formed on a base material.

4. 发明专利

DE69419329D1 未知
公开(公告)号：DE69419329D1
公开(公告)日：1999-08-12
申请号：DE69419329
申请日：1994-02-10
申请人： UNITIKA LTD
发明人： TOMIOKA ISAO , SAITO MINORU , IWAYA YOSHIAKI , ECHIGO YOSHIAKI
IPC分类号： C08G73/10 , C09D179/08 , H05K1/03
摘要： A film forming solution which does not require aprotic polar solvents, a porous film of poly(4,4'-oxydiphenylenepyromellitimide) obtained from the film forming solution which has excellent heat and chemical resistances, which is controllable in terms of porosity and pore size of the film and which has excellent electrical characteristics, and a coated material where the porous film is formed on a base material. Particularly, a film forming solution of a precursor of poly(4,4'-oxydiphenylenepyromellitimide) and a mixture of at least three solvents which are poor solvents for the precursor when each solvent is used alone, a porous film of poly(4,4'-oxydiphenylenepyromellitimide) obtained from the film forming solution and a coated material where the porous film is formed on a base material.

5. 发明专利

CA2136311A1 ALIPHATIC POLYESTERS AND METHOD OF PREPARING THE SAME 未知
公开(公告)号：CA2136311A1
公开(公告)日：1994-09-29
申请号：CA2136311
申请日：1994-03-18
申请人： UNITIKA LTD
发明人： IWAYA YOSHIAKI , MUKAI KATSUYUKI , KAWANISHI MASATOSHI , NISHINOHARA MINORU
IPC分类号： C08G63/16 , C08G63/82 , C08G63/672 , C08G63/85
摘要： 27 The present invention provides a high molecular weight aliphatic polyester which is biodegradable by microorganisms in soils and which is utilized as a molded article as well as a method to prepare the same. This polyester has a structure shown below: (1) as well as those analogous thereto.

6. 发明专利

DE69514976T2 未知
公开(公告)号：DE69514976T2
公开(公告)日：2000-06-29
申请号：DE69514976
申请日：1995-10-06
申请人： UNITIKA LTD
发明人： ECHIGO YOSHIAKI , OKAMOTO SHOJI , YAMADA HIROSHI , TOMIOKA ISAO , IWAYA YOSHIAKI
IPC分类号： C08G73/10 , C09D179/08 , H05K1/03

7. 发明专利

DE69422154T2 未知
公开(公告)号：DE69422154T2
公开(公告)日：2000-06-29
申请号：DE69422154
申请日：1994-07-20
申请人： UNITIKA LTD
发明人： ECHIGO YOSHIAKI , IWAYA YOSHIAKI , NAKANISHI KIYOTAKA
IPC分类号： B01D39/16 , B29B15/12 , B29C53/40 , B29C53/56 , B29C70/46 , B29D23/00 , F16L9/12 , B29C70/00
摘要： A porous tube of a fiber-reinforced plastic, which consists basically of fiber having a high tensile elastic modulus, such as glass fiber, and a matrix resin, such as polyethylene, and which has open cells and a high mechanical strength. This porous tube is useful as a constructional material for architectural and civil engineering work, a filter material, an air diffusing tube and a draining material.

8. 发明专利

DE69514976D1 未知
公开(公告)号：DE69514976D1
公开(公告)日：2000-03-16
申请号：DE69514976
申请日：1995-10-06
申请人： UNITIKA LTD
发明人： ECHIGO YOSHIAKI , OKAMOTO SHOJI , YAMADA HIROSHI , TOMIOKA ISAO , IWAYA YOSHIAKI
IPC分类号： C08G73/10 , C09D179/08 , H05K1/03

9. 发明专利

DE69422154D1 未知
公开(公告)号：DE69422154D1
公开(公告)日：2000-01-20
申请号：DE69422154
申请日：1994-07-20
申请人： UNITIKA LTD
发明人： ECHIGO YOSHIAKI , IWAYA YOSHIAKI , NAKANISHI KIYOTAKA
IPC分类号： B01D39/16 , B29B15/12 , B29C53/40 , B29C53/56 , B29C70/46 , B29D23/00 , F16L9/12 , B29C70/00
摘要： A porous tube of a fiber-reinforced plastic, which consists basically of fiber having a high tensile elastic modulus, such as glass fiber, and a matrix resin, such as polyethylene, and which has open cells and a high mechanical strength. This porous tube is useful as a constructional material for architectural and civil engineering work, a filter material, an air diffusing tube and a draining material.

10. 发明专利

AU670478B2 Film forming solution, porous film obtained therefrom and coated material with the porous film 未知
公开(公告)号：AU670478B2
公开(公告)日：1996-07-18
申请号：AU5508094
申请日：1994-02-10
申请人： UNITIKA LTD
发明人： TOMIOKA ISAO , SAITO MINORU , YAMADA HIROSHI , IWAYA YOSHIAKI , ECHIGO YOSHIAKI
IPC分类号： C08G73/10 , C09D179/08 , H05K1/03 , C09D5/25
摘要： A film forming solution which does not require aprotic polar solvents, a porous film of poly(4,4'-oxydiphenylenepyromellitimide) obtained from the film forming solution which has excellent heat and chemical resistances, which is controllable in terms of porosity and pore size of the film and which has excellent electrical characteristics, and a coated material where the porous film is formed on a base material. Particularly, a film forming solution of a precursor of poly(4,4'-oxydiphenylenepyromellitimide) and a mixture of at least three solvents which are poor solvents for the precursor when each solvent is used alone, a porous film of poly(4,4'-oxydiphenylenepyromellitimide) obtained from the film forming solution and a coated material where the porous film is formed on a base material.

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