公开(公告)号：JPS5461288A

公开(公告)日：1979-05-17

申请号：JP12722177

申请日：1977-10-25

Applicant: MITSUI TOATSU CHEMICALS

Inventor： OOTSUKA ICHIROU ,  NAGAI MASAO ,  ICHIKAWA KOUZOU ,  ICHIKAWA HIDEO ,  SHIMAMURA KATSUNORI

IPC: C08F2/00 ,  C08F2/02 ,  C08F2/18 ,  C08F279/00 ,  C08F279/02 ,  C08F291/00 ,  C08F291/02

Abstract: PURPOSE:The bulk polymerization is conducted after the rubber phase of an elastomer is dissolved in vinyl monomers to form the disperse phase, the bulk polymerization product is incorporated with water and agitation is continuedvto obtain said rubber-modified vinyl resin with good coloring property and high impact strength. CONSTITUTION:In the production of rubber-modified vinyl resins where a rubber elastomer is dissolved in vinyl monomers and the bulk polymerization under stirring and successive suspension polymerization are effected, after the rubber phase forms disperse phase during the bulk polymerization, water in such an amount that the water does not form continuous phase is added to the bulk polymerization product and stirring is continued for more than 15 min to form water-containing bulk polymer. The addition of water during the bulk polymerization changes microscopically the state of the bulk polymerization mixtur, thus changing the optical properties of the disperse phase of rubber elastomer that is being formed, especially suppressing the light interference.

公开(公告)号：JP2535666B2

公开(公告)日：1996-09-18

申请号：JP31282790

申请日：1990-11-20

Applicant: MITSUI TOATSU CHEMICALS

Inventor： TSUTSUMI TOSHIHIKO ,  NAKAKURA TOSHUKI ,  MORIKAWA SHUICHI ,  SHIMAMURA KATSUNORI ,  TAKAHASHI TOSHIAKI ,  MORITA ATSUSHI ,  KOGA NOBUSHI ,  YAMAGUCHI TERUHIRO ,  OOTA MASAHIRO

IPC: C08L67/02 ,  C08L67/00 ,  C08L71/00 ,  C08L71/08 ,  C08L71/10 ,  C08L79/08

公开(公告)号：JPS5523151A

公开(公告)日：1980-02-19

申请号：JP9620078

申请日：1978-08-09

Applicant: MITSUI TOATSU CHEMICALS

Inventor： OOTSUKA ICHIROU ,  NAKAMURA MITSUYOSHI ,  IIO KEIJI ,  SHIMAMURA KATSUNORI

IPC: C08F279/00 ,  C08F2/18 ,  C08F279/02 ,  C08L51/04

Abstract: PURPOSE:To improve the flame retardancy, impact strength and arc resistance of the title composition by polymerizing a specific mixture of styrene monomers containing a nucleus-substituted monobromostyrene and a rubber, under conditions to obtain the soft component as dispersed particles having specific particle size and swelling index. CONSTITUTION:A composition composed of 80-99wt% of a mixture of styrene monomers containing 10-60wt% of a nucleus-substituted monobromostyrene, and 1-20wt% of a rubber, is molten by heating. The composition is subjected to the bulk polymerization with stirring, until the polymerization rate reaches 10-30%, when the rubber is dispersed as particles by the action of stirring. The composition is then polymerized to a polymerization rate of nearly 100% by the aqueous suspension polymerization in the presence of a suspension agent such as tribasic calcium phosphate, etc. The amount of the rubber and the polymerization conditions are selected to give the dispersed particles of soft component having an average particle size of 1.0-7.0mu, and a swelling index in toluene of 8.0-16.0.

公开(公告)号：JPH08104811A

公开(公告)日：1996-04-23

申请号：JP23657595

申请日：1995-09-14

Applicant: MITSUI TOATSU CHEMICALS

Inventor： TSUTSUMI TOSHIHIKO ,  NAKAKURA TOSHIYUKI ,  MORIKAWA SHUICHI ,  SHIMAMURA KATSUNORI ,  TAKAHASHI TOSHIAKI ,  MORITA ATSUSHI ,  KOGA NOBUSHI ,  YAMAGUCHI TERUHIRO ,  OTA MASAHIRO

IPC: C08L67/02 ,  C08G63/60 ,  C08L67/00 ,  C08L79/08

Abstract: PURPOSE: To obtain the subject composition markedly improved in molding processability without impairing the excellent characteristics inherent in the resin and improved in the dimensional stability during its heat treatment process, comprising a polyimide made up of specific recurring structural unit and a polyester resin. CONSTITUTION: This composition comprises 99.9-50wt.% of a polyimide made up of recurring structural unit of formula I or formula II (X is a direct bond, 1-10C divalent hydrocarbon, hexafluoroisopropylidene, etc.; Y1 -Y4 are each H, a lower alkyl, Cl, Br, etc.; R is a >=2C aliphatic, alicyclic, monocyclic aromatic, general polycyclic aromatic group, etc.) and 0.1-50wt.% of a polyester. The polyester resin is an aromatic polyester or thermotropic liquid crystal polymer forming an anisotropic melt phase at

公开(公告)号：JPH04175373A

公开(公告)日：1992-06-23

申请号：JP31282790

申请日：1990-11-20

Applicant: MITSUI TOATSU CHEMICALS

Inventor： TSUTSUMI TOSHIHIKO ,  NAKAKURA TOSHIYUKI ,  MORIKAWA SHUICHI ,  SHIMAMURA KATSUNORI ,  TAKAHASHI TOSHIAKI ,  MORITA ATSUSHI ,  KOGA NOBUSHI ,  YAMAGUCHI TERUHIRO ,  OTA MASAHIRO

IPC: C08L67/02 ,  C08L67/00 ,  C08L71/00 ,  C08L71/08 ,  C08L71/10 ,  C08L79/08

Abstract: PURPOSE:To improve the moldability of a polyimide resin and the dimensional stability of a molded item thereof during thermal treatment by compounding a specific polyimide resin with a polyetherketone resin and/or a polyester resin. CONSTITUTION:99.5-50wt.% polyimide resin having structural repeating units of the formal (wherein X is a direct bond, a 1-10C divalent hydrocarbon group, hexafluoroisopropylidene, carbonyl, thio, or sulfonyl; Y1, Y2, Y3, and Y4 are each H, lower alkyl, lower alkoxy, chlorine, or bromine; and R is a tetravalent 2C or higher aliph., alicyclic, monocyclic arom., or condensed polycyclic arom. group) is compounded with 0.1-50% polyetherketone or polyester resin to give the title compsn., which is esp. suitable for molding at a high temp. under a high pressure.