Title:
【発明の名称】不溶性のN-ビニルアミドポリマーを装置から除去する方法
Document Type and Number:
Japanese Patent JP2961080
Kind Code:
B2
Abstract:
Insoluble polymer formed during the distillation of N-vinylformamide is removed by contacting the insoluble polymer with an aqueous weakly basis solution in a closed system at elevated temperature. Polymer (up to 50 wt % polymer gel or 5.5 wt % dry polymer in reaction mixture) is treated with an aqueous solution of an amine, alkanolamine or weak inorganic base having a concentration of at least 1 molar. Solvents like alcohols, glycol ethers or amides may be added as a cosolvent in an amount of from 0 to about 85% by weight.
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| JPH02151607 | FLUORINATED COPOLYMER AND USE THEREOF |
Inventors:
TOOMASU ARUBAATO JONSON
MARII RIIEIFUOON
MARII RIIEIFUOON
Application Number:
JP8108096A
Publication Date:
October 12, 1999
Filing Date:
April 03, 1996
Export Citation:
Assignee:
MITSUBISHI KAGAKU KK
International Classes:
C08F6/00; C07C231/24; C07C233/03; C08F26/02; C08J11/08; (IPC1-7): C07C231/24; C07C233/03; C08J11/08
Domestic Patent References:
| JP3181451A | ||||
| JP5301851A |
Attorney, Agent or Firm:
Chika Takagi (2 outside)