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1. 发明专利

JPH09227627A PRODUCTION OF SULFONIC-ACID-MODIFIED POLYVINYL ALCOHOL 失效
公开(公告)号：JPH09227627A
公开(公告)日：1997-09-02
申请号：JP3150296
申请日：1996-02-20
申请人： SHINETSU CHEMICAL CO
发明人： TANIOKA SOJI , NAKAMURA NORIO , ONDA YOSHIRO
IPC分类号： C08F8/12 , C08F18/04 , C08F36/14 , C08F218/04 , C08F236/14
摘要： PROBLEM TO BE SOLVED: To obtain a sulfonic-acid-modified polyvinyl alcohol excellent in alkali resistance by saponifying a copolymer of a specific sulfonated conjugated diene and a vinyl carboxylate. SOLUTION: This sulfonic-acid-modified polyvinyl alcohol is obtd. by saponifying a copolymer of a sulfonated conjugated diene represented by the formula [wherein R to R are each H, an alkyl, or SO3 X (wherein X is II, an alkali metal, an alkaline earth metal, or ammonium) provided at least one of them is SO3 X] and a vinyl carboxylate represented by the formula: CH2 =CH-OCOR (wherein R is an alkyl). Vinyl acetate is pref. as the vinyl carboxylate. The copolymer is obtd. usually by copolymerizing a sulfonated conjugated diene and a vinyl carboxylate using a free-radical polymn. initiator in the presence of an org. solvent.

2. 发明专利

JPH10158484A ANTISTATIC BIODEGRADABLE POLYMER COMPOSITION 失效
公开(公告)号：JPH10158484A
公开(公告)日：1998-06-16
申请号：JP35384696
申请日：1996-11-28
申请人： SHINETSU CHEMICAL CO
发明人： TOKUSHIGE YUJI , NAKAMURA NORIO , KUBOTA MITSUYASU , TAKAYA MASATERU
IPC分类号： C08K5/00 , C08L23/08 , C08L31/04 , C08L67/00 , C08L101/16
摘要： PROBLEM TO BE SOLVED: To obtain a highly antistatic composition by mixing a base comprising at least one biodegradable polymer selected among lactate polymers, glycol/ aliphatic dicarboxylic acid copolymers and polycaprolactones with a surfactant and EVA. SOLUTION: A biodegradable polymer selected among a lactate polymer (A) represented by formula I (wherein n=1,400-4,200) and having a weight- average molecular weight of 100,000-300,000, a glycol/aliphatic dicarboxylic acid copolymer (B) (20-70wt.% glycol/30-80wt.% dicarboxylic acid) and having a molecular weight of 50,000-300,000 and a polycaprolactone (C) represented by formula II (wherein l=75-800) and having a weight-average molecular weight of 30,000-80,000 alone or in the form of a binary mixture of B/A=20/80 to 40/60, C/A=20/80 to 40/60 or b/C=40/60 to 60/40 is used. 100 pts.wt. this polymer is mixed with 0.5-1.5 pts.wt. nonionic surfactant and 20-50 pts.wt. EVA having a molecular weight of 50,000-500,000, and the obtained mixture is melt-kneaded.

3. 发明专利

JPH09235456A BIODEGRADABLE FILM 失效
公开(公告)号：JPH09235456A
公开(公告)日：1997-09-09
申请号：JP4434396
申请日：1996-03-01
申请人： SHINETSU CHEMICAL CO
发明人： TOKUSHIGE YUJI , UEDA SHUHEI , NAKAMURA NORIO
IPC分类号： C08J5/18 , C08K3/00 , C08L31/04 , C08L67/02 , C08L67/04 , C08L101/16
摘要： PROBLEM TO BE SOLVED: To provide a biodegradable film freed from the problem of blocking. SOLUTION: This film is made from a composition containing at least two members selected from among lactic acid polymers, glycol/aliphatic dicarboxylic acid copolymers and polycaprolactones, an inorganic filler, and an ethylene/vinyl acetate copolymer. It may optionally contain at least one member selected from among heat stabilizers, plasticizers, lubricants and modified silicones.

4. 发明专利

JPH09151310A POLYMER COMPOSITION HAVING BIODEGRADABILITY AND SHRINK FILM 失效
公开(公告)号：JPH09151310A
公开(公告)日：1997-06-10
申请号：JP21559996
申请日：1996-08-15
申请人： SHINETSU CHEMICAL CO
发明人： TOKUSHIGE YUJI , NAKAMURA NORIO , TANIFUJI YOICHI , UEDA SHUHEI
IPC分类号： C08K5/09 , C08L67/00 , C08L67/04 , C08L101/16
摘要： PROBLEM TO BE SOLVED: To obtain a polymer composition containing a polylactic acid and a copolymer of ethylene/vinyl acetate having an improved breaking elongation and impact strength while keeping its transparency, excellent in releasing property in its processing, and useful as a shrink film, etc. SOLUTION: This polymer composition having a biodegradability is obtained by preferably adding one or more kinds selected from a group consisting of (C) a lubricant, (D) a plasticizer, (E) a heat stabilizing agent and (F) a releasing agent to a composition containing (A) a polylactic acid and (B) a copolymer of ethylene/vinyl acetate. Further, it is preferable that the component (B) contains 10-70wt.% ethylene and 30-90wt.% vinyl acetate, and a fatty acid ester, a hydrocarbon resin, a paraffine, etc., are used as the component (C), an aliphatic dibasic acid ester, a phthalic acid ester, a hydroxy polyvalent carboxylic acid ester, etc., are used as the component (D), 0.5 5 pts.wt. inorganic salt of lactic acid based on 100 pts.wt. component (A) is used as the component (E) and 0.05-5 pts.wt. silicone oil having 100-10000cs viscosity based on 100 pts.wt. component (A) is used as the component (F).

5. 发明专利

JPH0987320A METHOD AND APPARATUS FOR REMOVING MONOMER FROM VINYL ESTER POLYMER COMPOSITION 失效
公开(公告)号：JPH0987320A
公开(公告)日：1997-03-31
申请号：JP26638995
申请日：1995-09-20
申请人： SHINETSU CHEMICAL CO
发明人： OURA MAKOTO , NAKAJIMA HITOSHI , NAKAMURA NORIO
IPC分类号： C08F6/10 , C08F6/00
摘要： PROBLEM TO BE SOLVED: To efficiently and economically obtain in a short time a polymer scarcely containing monomers from a polymer composition containing monomers. SOLUTION: An apparatus is used which comprises: an inverted cone vessel 1 which contains a vinyl ester polymer composition containing monomers remaining unreacted and has a heating jacket 6; a screw 7, 8 disposed along a generating line of the inner circumferential wall of the vessel 1 so as to revolve around along the wall while rotating on its axis; and a mechanism which enables the screw 7, 8 to move in that manner. The vinyl ester polymer composition is stirred by means of the rotation and revolution of the screw 7, 8 under heating to vaporize and remove the unreacted monomers contained in the composition.

6. 发明专利

JPH09235455A BIODEGRADABLE FILM 失效
公开(公告)号：JPH09235455A
公开(公告)日：1997-09-09
申请号：JP4434496
申请日：1996-03-01
申请人： SHINETSU CHEMICAL CO
发明人： TOKUSHIGE YUJI , UEDA SHUHEI , NAKAMURA NORIO
IPC分类号： C08J5/18 , C08K3/00 , C08L31/04 , C08L67/04 , C08L101/16
摘要： PROBLEM TO BE SOLVED: To obtain a biodegradable film not problematic in blocking by mixing a lactic acid polymer with an ethylene/vinyl acetate copolymer and an inorganic filter. SOLUTION: A lactide being a cyclodimer of lactic acid is polymerized through ring opening or L-lactic acid, D-lactic acid or a mixture thereof is condensed through dehydration to obtain a lactic acid polymer (A) being e.g. a polylactic acid having a weight-average molecular weight of 100,000-300,000 or a lactic acid/hydroxycarboxylic acid copolymer having a content of lactic acid units of 80mol% or above and a weight-average molecular weight of 5,000-250,000. An ethylene/vinyl acetate copolymer (B) having an ethylene content of 10-60wt.% and a vinyl acetate content of 40-90wt.% is mixed with an inorganic filler (C) having a mean particle diameter of 1-5μm and optionally at least one member selected from among heat stabilizers (D), plasticizers (E), lubricants (F) and modified silicones (G) to form a stock material. One hundred (100) pts.wt. component A is mixed with 10-50 pts.wt. component B, 0.05-2 pts.wt. component C and the additives, and the obtained mixture is kneaded. A film made from the obtained composition is stretched.

7. 发明专利

JPH09169896A BIODEGRADABLE POLYMER COMPOSITION AND SHRINK FILM 失效
公开(公告)号：JPH09169896A
公开(公告)日：1997-06-30
申请号：JP21970196
申请日：1996-08-21
申请人： SHINETSU CHEMICAL CO
发明人： TOKUSHIGE YUJI , OURA MAKOTO , NAKAMURA NORIO , UEDA SHUHEI
IPC分类号： C08J5/18 , C08L67/00 , C08L67/04 , C08L101/16
摘要： PROBLEM TO BE SOLVED: To obtain a biodegradable polymer composition which gives a biode gradable shrink film excellent in transparency, strength, flexibility, releasability and shrinkability by using a mixture of at least two specified biodegradable polymers as the principal constituent. SOLUTION: This composition mainly comprises a mixture of at least two of a polylactic acid, a glycol/aliphatic dicarboxylic acid copolymer and a polycaprolactone. This composition more preferably comprises one containing at least a polylactic acid. The polylactic acid is obtained preferably by the ring-opening polymerization of a lactide comprising a cyclic dimer of lactic acid. The glycol/aliphatic dicarboxylic acid copolymer used comprises an aliphatic polyester synthesized by the condensation polymerization of a glycol and an aliphatic dicarboxylic acid and has a glycol content of 20-70wt.%. The polycaprolactone is a crystalline thermoplastic represented by formula I (wherein R is of formula II or III).

8. 发明专利

JPH0995605A BIODEGRADABLE SHRINK FILM 失效
公开(公告)号：JPH0995605A
公开(公告)日：1997-04-08
申请号：JP25306595
申请日：1995-09-29
申请人： SHINETSU CHEMICAL CO
发明人： TOKUSHIGE YUJI , UEDA SHUHEI , NAKAMURA NORIO
IPC分类号： C08J5/18 , B29C61/06 , B29K105/02 , B29L7/00 , C08K5/098 , C08K5/10 , C08K5/13 , C08K5/17 , C08K5/36 , C08K5/49 , C08L67/00 , C08L67/04 , C08L83/04 , C08L101/16
摘要： PROBLEM TO BE SOLVED: To obtain a biodegradable shrink film which mainly comprises poly (lactic acid) excellent in elongation at break, Izod impact strength, heat shrink age as well as printability and useful for labels. SOLUTION: This biodegradable shrinking film is composed mainly of a composition containing (A) a poly(lactic acid), (B) a plasticizer, preferably an aliphatic dibasic acid ester, a phthalic ester, a hydroxypolycarboxylic ester, polyester plasticizer, a fatty acid ester, an epoxy plasticizer or their mixture, for example, di-2-ethylhexyl azelate, and, when necessary, (C) a lubricant preferably a fatty acid ester, a hydrocarbon resin, paraffin, a higher fatty acid, a hydroxyfatty acid, a fatty acid amide, an alkylenebis(fatty acid amide), an aliphatic ketone, a fatty acid lower alcohol ester, a fatty acid polyhydric alcohol ester, a fatty acid polyglycol ester, a fatty alcohol, a polyhydric alcohol}, a heat stabilizer, suitably a lactic acid inorganic salt for example, sodium lactate.

9. 发明专利

JPH06234810A PRODUCTION OF SULFATE ESTER SALT OF POLYVINYL ALCOHOL 失效
公开(公告)号：JPH06234810A
公开(公告)日：1994-08-23
申请号：JP4591393
申请日：1993-02-10
申请人： SHINETSU CHEMICAL CO
发明人： OURA MAKOTO , KODAMA IEHIRO , NAKAMURA NORIO
IPC分类号： C08F8/14 , C08F8/42 , C08F8/44
摘要： PURPOSE:To obtain a sulfate ester of polyvinyl alcohol having a high degree of esterification in high yield by sulfating PVA, removing the unreacted PVA, then treating the resultant product with an aqueous solution of an alkali and subsequently ultrafiltering the treated product. CONSTITUTION:PVA (preferably having 80-100% degree of saponification and 100-3000 degree of polymerization) is made to react with a sulfating agent (preferably pyridine salt of chlorosulfonic acid) and the unreacted PVA is then removed according to the filtration by suction using a glass filter. An aqueous solution of an alkali (preferably an aqueous solution of a strong alkali such as NaOH) is added to carry out the alkali treatment of the resultant PVA sulfate ester obtained as described above. The produced sulfate ester salt of the PVA is subsequently ultrafiltered and purified. Thereby, the objective compound is obtained. An ultrafiltration membrane having the resistance to the aqueous solution of the strong alkali such as a polyethersulfone-based membrane is preferably used for the ultrafiltration.

10. 发明专利

JPH09302207A TRANSPARENT FILM FOR LIQUID JET RECORDING 失效
公开(公告)号：JPH09302207A
公开(公告)日：1997-11-25
申请号：JP15737196
申请日：1996-05-15
申请人： SHINETSU CHEMICAL CO
发明人： UEDA SHUHEI , TOKUSHIGE YUJI , NAKAMURA NORIO
IPC分类号： C08J5/18 , C08L31/04 , C08L67/00 , C08L67/04 , C08L101/16
摘要： PROBLEM TO BE SOLVED: To obtain a biodegradable OHP film which is excellent in light transmittance and marring resistance and to which an ink adheres well without causing nonuniformity in printing, such as pinholes, even when printing is made on the surface independent of the type of a printing press by using a lactic acid polymer, an etylene/vinyl acetate copolymer and a lubricant as the principal constituents. SOLUTION: This film contains as the principal constituents a lactic acid polymer (A), an ethylene/vinyl acetate copolymer (B) and a lubricant (C). Examples of component A used include a polylactic acid preferably having a weight-average molecular weight of 100,000 to 300,000 and a lactic acid/ hydroxycarboxylic acid copolymer consisting of 80-20wt.% lactic acid units and 20-80wt.% hydroxycarboxylic acid (e.g. glycolic acid) units and preferably having a molecular weight of 100,000 to 200,000. The component B preferably comprises one having an ethylene content of 30-90wt.% and a vinyl acetate content of 30-90wt.%, and it is used in an amount of 5-70 pts.wt. based on 100 pts.wt. component A. The lubricant C used comprises, e.g. a fatty acid ester, which is blended in an amount of 0-0.5wt.% based on the component A.

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