公开(公告)号：JP2001172894A

公开(公告)日：2001-06-26

申请号：JP35428199

申请日：1999-12-14

Applicant: JSR CORP

Inventor： KURITA OSAMU ,  MIYAJIMA FUMINAO ,  ISHIKAWA OSAMU

IPC: C08F236/12 ,  D21H19/42 ,  D21H19/58 ,  D21H21/54

Abstract: PROBLEM TO BE SOLVED: To provide a method for producing a copolymer latex which is used for coating paper, largely improves the adhesive strength of the coated paper, improves coated paper physical properties such as print gloss, and has excellent coating operation properties such as excellent redispersibility, mechanical stability and anti-tackiness, to provide the copolymer latex for coating paper, and to provide a composition for coating paper. SOLUTION: This method for producing the copolymer latex, comprising a process for emulsion-polymerizing monomers in the presence of a polymerization initiator containing a free radical catalyst and a reducing agent and adding at least a part of the reducing agent to the reaction process of the monomers by at least one of a batch type method and a continuous method, wherein the weight-average mol.wt. of components detected more late than an elution time corresponding to a mol.wt. of 1,000,000 converted into polystyrene in a mol.wt. distribution obtained by the measurement of GPC is 30,000 to 400,000.

公开(公告)号：JP2002030113A

公开(公告)日：2002-01-31

申请号：JP2000318277

申请日：2000-10-18

Applicant: JSR CORP

Inventor： SAKURAI FUJIO ,  ZAMA YOSHIAKI ,  KURITA OSAMU

IPC: B01J13/04 ,  B01J19/00 ,  C08F2/00 ,  C08F2/22 ,  C08F2/44 ,  C08F8/44 ,  C08F285/00 ,  C08K3/00 ,  C08L51/06 ,  C08L101/00 ,  D21H19/42 ,  D21H21/54

Abstract: PROBLEM TO BE SOLVED: To provide hollow polymer particles being satisfactory in hiding power, gloss, strengths, water resistance, alkali resistance, and weathering resistance and having a uniform particle diameter and a high hollow rate and a method for producing the same. SOLUTION: The hollow polymer particles are obtained by emulsion- polymerizing 100 pts.wt. monomer mixture comprising 5-80 wt.% unsaturated carboxylic acid and 20-95 wt.% radical-polymerizable monomer in the presence of 2-50 pts.wt. (A) polymer particles obtained by emulsion-polymerizing a monomer mixture comprising an unsaturated carboxylic acid and a radical- polymerizable monomer in an aqueous medium to obtain (B) polymer particles, emulsion-polymerizing 100 pts.wt. (c) monomer mixture comprising 0-20 wt. % unsaturated carboxylic acid and 80-100 wt.% radical-polymerizable monomer in the presence of 3-100 pts.wt. particles B to obtain (C) core/shell polymer particles in each of which the shell is a coating of the polymer derived from monomer mixture (c), and adjusting a dispersion of particles C to a pH of at least 7 with a volatile base to effect the neutralization of swelling of particles C.

公开(公告)号：JPH10245408A

公开(公告)日：1998-09-14

申请号：JP6748497

申请日：1997-03-06

Applicant: JSR CORP

Inventor： KURITA OSAMU ,  GOTO HIROFUMI ,  SHIHO KOUJI ,  NORITAKE YOSHIKA

IPC: C08F2/00 ,  C08F4/00

Abstract: PROBLEM TO BE SOLVED: To make it possible to obtain a polymer having narrow polydispersibility and easily to obtain a block copolymer, by polymerizing a specific unsaturated monomer in the presence of a radical polymerization initiator and a nitroxide compound. SOLUTION: This method of radical polymerization is to polymerize (C) a radically polymerizable unsaturated monomer having

公开(公告)号：JPH10195244A

公开(公告)日：1998-07-28

申请号：JP1780497

申请日：1997-01-16

Applicant: JSR CORP

Inventor： KURITA OSAMU ,  ISHIKAWA OSAMU ,  TSURUOKA KATSUHIKO

IPC: C08L13/02 ,  C08L9/10 ,  C09D113/02 ,  D21H19/56 ,  D21H19/58

Abstract: PROBLEM TO BE SOLVED: To obtain a copolymer latex excellent in coating operability and capable of providing coated paper excellent in surface strength, wet strength, etc., by using an emulsifier containing a specific alkylbenzenesulfonic acid salt. SOLUTION: This copolymer latex is obtained by allowing 50-95wt.% alkylbenzenesulfonic acid salt of the formula (R is a 3-6C alkyl; R is an alkyl having a carbon number determined so that the total carbon number of R and R may be 9-13; M is K, Na or NH4 ) to be included in (D) an emulsifier, when emulsifying a copolymer of a monomer mixture comprising (A) 20-70wt.% aliphatic conjugated diene-based monomer, (B) 0.5-7wt.% ethylenically unsaturated carboxylic acid monomer and (C) 3-73wt.% other copolymerizable vinyl-based monomer, in the presence of the component D.

公开(公告)号：JP2001146694A

公开(公告)日：2001-05-29

申请号：JP32805399

申请日：1999-11-18

Applicant: JSR CORP

Inventor： KURITA OSAMU ,  MIYAJIMA FUMINAO ,  ISHIKAWA OSAMU

IPC: C08F236/12 ,  D21H19/42 ,  D21H19/58 ,  D21H21/54

Abstract: PROBLEM TO BE SOLVED: To obtain a copolymer latex for paper coating, capable of providing the coated paper having extremely improved adhesive strength, and excellent in coated paper properties such as the gloss of print, and in operability of coating, such as redispersibility, mechanical stability and stickiness-preventing properties, and further to provide a method for producing the copolymer latex and to obtain a composition for paper coating. SOLUTION: This copolymer latex for paper coating contains >=31% components detected at the time earlier than the elution time corresponding to 1,000,000 molecular weight expressed in terms of a polystyrene in the molecular weight distribution measured by a gel permeation chromatography(GPC). The weight average molecular weight of the components detected at the time later than the elution time corresponding to 1,000,000 molecular weight expressed in terms of the polystyrene is 30,000-400,000, and the content of components therein insoluble in toluene is >=31 wt.%.

公开(公告)号：JP2001031726A

公开(公告)日：2001-02-06

申请号：JP20667899

申请日：1999-07-21

Applicant: JSR CORP

Inventor： KURITA OSAMU ,  TAKESHITA KOSUKE ,  ISHIKAWA OSAMU

IPC: C08L9/10 ,  C08F2/22 ,  C08F236/04 ,  C08F246/00 ,  C08L101/00 ,  C08L101/16 ,  D21H19/58

Abstract: PROBLEM TO BE SOLVED: To provide a copolymer latex for obtaining a compsn. for paper coating which has bond strength and blister resistance which are excellent and balanced with each other, which has excellent print gloss and which is free from sticking at the time of paper coating, and a compsn. for paper coating thereof. SOLUTION: This copolymer latex comprisies (a) 10-60 wt.% of an aliph. conjugated diene monomer unit, (b) 0.15-10 wt.% of an amide group-contg. ethylenically unsatd. monomer unit, (c) 0.1-3 wt.% of an ethylenically unsatd. carboxylic acid monomer unit and (d) 27-89 wt.% of another monomer unit copolymerizable with these, and the wt. ratio of the component (b) to the component (c) is 1.5 or more, and the amt. of a toluene-insol. portion of the copolymer obtd. by coagulating the latex with an alcohol at a regulated pH of 8 followed by drying minus the amt. of a toluene-insol. portion measured in the same way at a regulated pH of 2, is not more than 30 wt.%.

公开(公告)号：JPH11279336A

公开(公告)日：1999-10-12

申请号：JP34142198

申请日：1998-12-01

Applicant: Jsr Corp ,  ジェイエスアール株式会社

Inventor： KURITA OSAMU ,  YAMAGUCHI TOMOYUKI ,  ISHIKAWA OSAMU ,  TSURUOKA KATSUHIKO

IPC: C08L9/10 ,  C08F2/38 ,  C08F236/04 ,  D21H19/20

Abstract: PROBLEM TO BE SOLVED: To provide a copolymer latex useful as a binder for paper coating compositions, which improves the surface strength of the coated paper, has a high water resistance, ink drying property and print gloss, has a good coating workability with an improved sticking inhibiting property and yields a coated paper which exerts the above-mentioned high printability at a wide range of printing speed.
SOLUTION: The latex is obtained by emulsion-polymerizing a monomer comprising (a) from 20 to 80 wt.% aliphatic conjugated diene monomer, (b) from 0.1 to 10 wt.% ethylene unsaturated carboxylic acid monomer and (c) from 10 to 79.9 wt.% other monomers copolymerizable with monomer (a) and monomer (b). This emulsion polymerization is carried out in the presence of diphenyl ethylene and/or nuclear substitution product thereof. The copolymer has at least one glass transition temperature within the range of from -100 to 60°C, and the difference ΔT between the lowest temperature T1 and the highest temperature T2 within the transition area in the thermogram obtained using the differential scanning calorimeter is 30°C or more preferably 35°C or more.
COPYRIGHT: (C)1999,JPO

Abstract translation: 要解决的问题：为了提供可用作纸涂层组合物的粘合剂的共聚物胶乳，其改善了涂布纸的表面强度，具有高耐水性，油墨干燥性能和印刷光泽度，具有良好的涂布可加工性，并具有改进的 并且产生在宽的印刷速度范围内发挥上述高可印刷性的涂布纸。 解决方案：通过将包含（a）20至80重量％的脂族共轭二烯单体，（b）0.1至10重量％的乙烯不饱和羧酸单体和（c）10至10重量％的单体乳液聚合， 79.9重量％可与单体（a）和单体（b）共聚的其它单体。 该乳液聚合在二烯乙烯和/或其核取代产物存在下进行。 该共聚物的玻璃化转变温度至少在-100〜60℃的范围内，使用差示扫描量热计得到的热分析图的过渡区域内的最低温度T1与最高温度T2之差ΔT为 30℃以上，更优选35℃以上。

公开(公告)号：JPH10245407A

公开(公告)日：1998-09-14

申请号：JP6748397

申请日：1997-03-06

Applicant: JSR CORP

Inventor： GOTO HIROFUMI ,  NORITAKE YOSHIKA ,  KURITA OSAMU ,  SHIHO KOUJI

IPC: C08F2/00 ,  C08F4/00

Abstract: PROBLEM TO BE SOLVED: To enable to obtain a polymer having a narrow polydispersivity and easily obtain a block copolymer, by polymerizing a specific monomer in the presence of a radical polymerization initiator and a specific radical. SOLUTION: (A) A radically polymerizable unsaturated monomer is polymerized in the presence of (B) 0.05-20wt.% of a radical polymerization initiator based on the total monomer and (C) 10-0.5 molar ratio [(the ingredient B)/(the ingredient C)] of a radical expressed by the formula [R to R are each, at least one of them, a hydrophilic group and the rest a (hydroxy)alkyl, an alkoxyalkyl, cyano, an (un)substituted alicyclic group, an (un)substituted aromatic group, etc.; R to R are each a 1-10C alkyl, a halogenated alkyl, an aromatically substituted alkyl] in preferably water and/or a solvent, which is a hydrophilic solvent.

公开(公告)号：JP2002188059A

公开(公告)日：2002-07-05

申请号：JP2000387342

申请日：2000-12-20

Applicant: JSR CORP

Inventor： KATO MINORU ,  KURITA OSAMU ,  MOGI TAKESHI

IPC: C09G1/00 ,  C08F220/18 ,  C09G1/16

Abstract: PROBLEM TO BE SOLVED: To provide a composition for polishing agents excellent in endurance, leveling property, gloss, water resistance, resistance to detergents and suitability for dry puff. SOLUTION: This composition for polishing agents comprises a copolymer obtained by carrying out emulsion polymerization of (A) 100 pts.wt. ethylenic unsaturated monomer mixture composed of (a) 3-30 wt.% ethylenically unsaturated carboxylic acid monomer, (b) 10-80 wt.% (meth)acrylic acid alkyl ester monomer and (c) 0-87 wt.% other monomer copolymerizable with these components (a) and (b) [wherein (a)+(b)+(c)=100 wt.%] with (B) 0.1-30 pts.wt. crosslinking unsaturated monomer. Swelling ratio of the copolymer-containing composition with a solvent is 10-500%.

公开(公告)号：JP2000154496A

公开(公告)日：2000-06-06

申请号：JP32628498

申请日：1998-11-17

Applicant: JSR CORP

Inventor： KURITA OSAMU ,  YAMAGUCHI TOMOYUKI ,  IKEDA KENGO ,  HARA HIDEJI ,  TSURUOKA KATSUHIKO

IPC: B41M1/32 ,  D21H19/58

Abstract: PROBLEM TO BE SOLVED: To obtain both a copolymer latex capable of remarkably improving surface strength and blister resistance of a coated paper, excellent in white paper gloss and printing gloss, improved in mechanical stability and stickiness preventing properties, excellent in coating operation efficiency and suitable for coating a paper, especially coating of a printing paper for high-speed rotary offset printing and a composition for coating the paper using the copolymer latex. SOLUTION: This composition for coating a paper is obtained by carrying out an emulsion polymerization of (a) 10-80 pts.wt. of a conjugated diene-based monomer, (b) 0.5-15 pts.wt. of an ethylenically unsaturated carboxylic acid monomer and (c) 5-89.5 pts.wt. of other monomers copolymerizable with the monomers (a) and (b) [in which the total amount of the monomers (a), (b) and (c) is 100 pts.wt.] in an aqueous medium and has >=80 wt.% toluene-insoluble content. The composition for coating the paper uses the copolymer latex.