Bowl-shape microparticle and production thereof

Details Bowl-shape microparticle and production thereof Bowl-shape microparticle and production thereof

1995-06-06

1996-09-24

Zitomer, Fred

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

5263031, 526315, 526319, 526335, 526342, 526343, 526344, 526347, 5263471, 526346, 526930, 526909, C06F 218

Patent

active

055592023

ABSTRACT:
The present invention provides new non-spherical microparticles. The microparticles are a hemisphere or a half elliptic sphere having a big opening at the central portion, say bowl-shape microparticles, and a water uptake of from 80 to 140 ml/100 g, which can be produced by suspension polymerization of polymerizable monomers in the presence of crosslinking agents and hydrophobic liquids in water. The microparticle of the present invention has an excellent extending ability, adhesiveness and water uptake. The new bowl-shape microparticles having the big opening at the center can be easily produced according to the present invention, and the size and shape can be easily controlled.

REFERENCES:
patent: 4743507 (1988-05-01), Franses
patent: 4839395 (1989-06-01), Masamizu
patent: 4973632 (1990-11-01), Nagasuna

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