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    PRODUCTION OF SYNDIOTACTIC STYRENIC POLYMER
    52.
    发明专利
    PRODUCTION OF SYNDIOTACTIC STYRENIC POLYMER 失效

    公开(公告)号：JP2001081121A

    公开(公告)日：2001-03-27

    申请号：JP26424599

    申请日：1999-09-17

    Applicant: AGENCY IND SCIENCE TECHN ,  JAPAN CHEMICAL INNOVATION INST

    Inventor： KAWABE MASANAO ,  MURATA MASAHIDE ,  KASE TOSHIO ,  OZAKI HIROYUKI ,  FUKUI YOSHIFUMI ,  HAGIWARA HIDEAKI ,  JIN JIJU ,  MIYAZAWA SATORU ,  TSUCHIHARA KENJI ,  SUZUKI YASUZO ,  ASAI MICHIHIKO ,  SOGA KAZUO

    IPC: C08F4/64 ,  C08F4/659 ,  C08F4/6592 ,  C08F12/00 ,  C08F12/08

    Abstract: PROBLEM TO BE SOLVED: To obtain a method for producing a syndiotactic styrenic polymer, by which the syndiotactic styrenic polymer that has excellent heat resistance and excellent moldability, is useful as a high performance resin or the like, and has a highly syndiotactic structure and a high mol.wt. can efficiently be obtained, by polymerizing a specific styrenic monomer in the presence of a specific catalyst in a specific solvent at a specified temperature. SOLUTION: This method for producing a syndiotactic styrenic polymer comprises polymerizing one or more kinds of styrenic monomers of the formula [R is H or the like; (m) is 0 to 5] in a solvent comprising a halogenated aromatic hydrocarbon having a dielectric constant of 3.0 to 5.5 at a temperature of -50 to 40 deg.C in the presence of a catalyst component consisting mainly of the reaction product of (A) a transition metal compound of the formula: MR1aR2bR3cX14-(a+b+c) and/or the formula: MR1dR2eX13-(d+e) [R1 to R3 are each H or the like; M is titanium or the like; X1 is a halogen; (a) to (c) are each 0 to 4; (d) and (e) are each 0 to 3] with (B) one or more compounds selected from organic aluminoxy compounds, ionic compounds which can react with the component A to produce cationic transition metal compounds, Lewis acid compounds, and so on.

    MULTI-BRANCHED POLYMER AND ITS PRODUCTION
    55.
    发明专利
    MULTI-BRANCHED POLYMER AND ITS PRODUCTION 失效

    公开(公告)号：JP2000086758A

    公开(公告)日：2000-03-28

    申请号：JP25499298

    申请日：1998-09-09

    Applicant: AGENCY IND SCIENCE TECHN ,  JAPAN CHEMICAL INNOVATION INST

    Inventor： YAMAKAWA YOSHITAKA ,  UEDA MITSURU ,  ASAI MICHIHIKO ,  TAKEUCHI KAZUHIKO

    IPC: C08G69/16

    Abstract: PROBLEM TO BE SOLVED: To obtain a multi-branched polymer which can easily be produced, has a highly regular branched structure and a relatively even mol.wt. distribution, and is useful for producing various kinds of highly functional materials related to chemical field, medicinal field, etc. by binding specific basic repeating units to each other and controlling a weight-average mol.wt., etc. in specific ranges, respectively. SOLUTION: This multi-branched polymer comprises basic repeating units of formulas I or II, and III (R1 is a 1-20C trivalent hydrocarbon; and R2 is a 1-20C divalent hydrocarbon), and has a weight-average mol.wt. and a mol.wt. distribution of

    ORDERED POLYURETHANE AND ITS PRODUCTION
    57.
    发明专利
    ORDERED POLYURETHANE AND ITS PRODUCTION 失效

    公开(公告)号：JPH11171965A

    公开(公告)日：1999-06-29

    申请号：JP37053397

    申请日：1997-12-08

    Applicant: AGENCY IND SCIENCE TECHN ,  KAGAKU GIJUTSU SENRYAKU SUISHI

    Inventor： NISHIO AKINORI ,  UEDA MITSURU ,  SUGIYAMA JUNICHI ,  TAKEUCHI KAZUHIKO ,  ASAI MICHIHIKO

    IPC: C08G18/08 ,  C08G18/76

    Abstract: PROBLEM TO BE SOLVED: To obtain the subject polyurethane exhibiting specific thermal and dynamic properties and useful as a functional material for liquid crystals, non- linear optical articles, and the like by including specific head-tail structure units and specified head-head-tail-tail structure units in a specific ratio. SOLUTION: This ordered polyurethane comprises (A) head-tail structure units of formula I [R1 and R2 are each H or a lower alkyl; (n) is 1-10] and (B) head-head-tail-tail structure units of formula II (R3 is a divalent alcohol residue) in a (y)/[(x)+(y)] ratio of 0.7-1. The polyurethane of the component B is obtained by reacting a diisocyanate compound with about 1/2 fold mole of the diol compound at the above-described temperature.

    BENZYL ETHER-BASED DENDRIMER COMPOUND
    58.
    发明专利
    BENZYL ETHER-BASED DENDRIMER COMPOUND 失效

    公开(公告)号：JPH11171812A

    公开(公告)日：1999-06-29

    申请号：JP35630397

    申请日：1997-12-09

    Applicant: AGENCY IND SCIENCE TECHN ,  KAGAKU GIJUTSU SENRYAKU SUISHI

    Inventor： YAMAKAWA YOSHITAKA ,  UEDA MITSURU ,  ASAI MICHIHIKO ,  TAKEUCHI KAZUHIKO ,  NAGAHATA RITSUKO

    IPC: C07C39/17 ,  C07C43/215 ,  C07C43/23

    Abstract: PROBLEM TO BE SOLVED: To obtain the subject new compound useful as an intermediate for enabling the synthesis of a polymer in a fewer reaction stages by using a calixresorcinolarene containing a number of hydroxyl groups at a central nucleus. SOLUTION: A compound of formula I [R is a (non)substituted benzyloxy; R is hydrogen or R; R to R are each hydrogen, a halogen or the like with the proviso that at least one of R to R is a (non)substituted benzyloxy]. The compound is obtained by reacting a compound of formula II (All is allyl; X is hydrogen, an alkyl or the like; (p) is 0-3) with a calix [4] resorcinolarene compound of formula III (Y is X; (q) is 1-3; Z is hydrogen or a hydroxyl group). The compound of formula II is obtained, for example, by starting from 3,5- dihydroxybenzoic acid. The compound of formula III is obtained by reacting resorcinol or pyrogallol with a hydroxyl group-containing aromatic aldehyde. A C-3,5-Dihydroxyphenylcalix[4]resorcinolarene is a new compound.

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