Title:
ポリメタクリルイミドフォーム物質の製造法、該フォーム物質、該フォーム物質の使用法並びに該フォーム物質から形成された核を有するプレプレッグ
Document Type and Number:
Japanese Patent JP4017739
Kind Code:
B2
Abstract:
A process for the production of polymethacrylimide (PMAI) foam comprises (A) making a copolymer by polymerisation in presence of radical initiator(s) etc., starting from (a) 40-60 wt% methacrylonitrile, 60-40 wt% methacrylic acid and optionally up to 20 wt% (based on nitrile plus acid) other mono-vinyl monomers, (b) 0.5-8 wt% blowing agent consisting of formamide or monomethylformamide and a 3-8C monohydric aliphatic alcohol, and (c) a crosslinker system containing (c1) 0.005-5 wt% radically polymerisable vinyl compound with at least 2 double bonds and (c2) 1-5 wt% magnesium oxide dissolved in the monomer mixture, and (B) expanding a block of this polymer at 200-260 degrees C and then subjecting the foam to a 2-stage heat treatment for 2-6 hours at 100-130 degrees C followed by 32-64 hours at 180-220 degrees C. Also claimed is (i) PMAI foam obtained by this process and (ii) a prepreg with a core of this PMAI foam.
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Inventors:
Werner Gaier
Hermann zybert
Sabine Zarvati
Hermann zybert
Sabine Zarvati
Application Number:
JP11198998A
Publication Date:
December 05, 2007
Filing Date:
April 22, 1998
Export Citation:
Assignee:
Roehm GmbH
International Classes:
C08J5/24; C08J9/04; B32B27/30; C08F8/48; C08F220/06; C08F220/50; C08J9/06; C08J9/14; C08K3/22; C08K5/20; C08L33/02; C08L33/22; C08F220/42
Domestic Patent References:
| JP54003875A |
Attorney, Agent or Firm:
Toshio Yano
Toshiomi Yamazaki
Takuya Kuno
Reinhard Einsel
Toshiomi Yamazaki
Takuya Kuno
Reinhard Einsel