Title:
PRODUCTION OF CURED PHENOL RESIN PARTICLE
Document Type and Number:
Japanese Patent JP3226237
Kind Code:
B2
Abstract:
PURPOSE: To readily obtain the subject particles having a low bulk specific gravity in a short time, having no coloration or a pale coloration, hardly darkening even by allowing to stand for a long period of time by reacting a methylol group-containing liquid phenol resin with an organic ester in a dispersed state.
CONSTITUTION: (A) A methylol-containing liquid phenol is reacted with (B) an organic ester (preferably formic ester or γ-butyrolactone) in a dispersed state generally for 3-180 minutes to give the objective particles. The reaction is preferably carried out by dispersing the component A into a dispersion medium such as hexane under stirring and adding the component B to the dispersion. The component A is generally obtained by reacting a phenol or a novolak type phenolic resin with an aldehyde in the presence of a basic catalyst or an acidic bivalent metal salt catalyst.
Inventors:
Mitsuhiro Nagata
Isao Kai
Isao Kai
Application Number:
JP4605993A
Publication Date:
November 05, 2001
Filing Date:
February 12, 1993
Export Citation:
Assignee:
Asahi Organic Material Co., Ltd.
International Classes:
C08G8/32; C08G8/00; (IPC1-7): C08G8/00
Domestic Patent References:
| JP4935491A | ||||
| JP4940392A | ||||
| JP3174428A | ||||
| JP60108434A | ||||
| JP62235312A | ||||
| JP596208A | ||||
| JP523785A | ||||
| JP46147B1 |
Attorney, Agent or Firm:
Agata Akira (1 person outside)