Spherical particles of thermosetting phenolic resin and process

Details Spherical particles of thermosetting phenolic resin and process Spherical particles of thermosetting phenolic resin and process

1988-01-06

1989-06-13

Schain, Howard E.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525504, 528162, 528164, 528165, C08G 828

Patent

active

048394459

ABSTRACT:
The present invention relates to a process for producing spherical thermosetting phenolic resin particles having a size of no larger than about 1,000 microns, and the spherical thermosetting phenolic resin particles produced by this process.
In accordance with the process of the present invention, a novolak resin, and a nitrogenous basic compound, and, optionally, an aldehyde, are reacted while they are suspended in an aqueous medium in the presence of a suspension stabilizer.
The thermosetting phenolic resin produced by the process of the present invention not only displays superior thermal curing characteristics during molding; the cured product fabricated by molding this resin also exhibits good physical properties such as improved mechanical strength and heat resistance. Therefore, the spherical thermosetting phenolic resin particles produced by the process of the present invention can be extensively used as molding materials, binders, adhesives, and in many other applications.

REFERENCES:
patent: 2162035 (1939-06-01), Seebach
patent: 3434997 (1969-03-01), Schmoll
patent: 3472915 (1969-10-01), Rider
patent: 4010163 (1977-03-01), Hesse et al.
patent: 4169937 (1979-10-01), Vargiu et al.
patent: 4239869 (1980-12-01), Annis
patent: 4403076 (1983-09-01), McDonald
patent: 4542204 (1985-09-01), Shibahara et al.
patent: 4640971 (1987-02-01), Echigo et al.
patent: 4748214 (1988-05-01), Asami et al.
Abstract of Japanese Patent Publication 42 077/78, Toyo, May 1976.
English Translation of Japanese Patent Publication No. 42077/78 (Toyo).

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