B - Operations – Transporting – 01 – J
Patent
B - Operations, Transporting
01
J
400/5019, 117/46
B01J 13/16 (2006.01) B41M 5/165 (2006.01) C08F 265/04 (2006.01) C08F 271/02 (2006.01) C08F 291/00 (2006.01) C08K 9/10 (2006.01) C09D 151/00 (2006.01) D21H 21/54 (2006.01)
Patent
CA 1303437
Abstract of the Disclosure Hollow polymer particles having at least two polymer layers, wherein (1) the particles have an average particle diameter in the range of 0.15 to 20 micrometers, (2) each of the particles has an average equivalent hollow diameter/equivalent particle diameter in the range of 0.2 to 0.8, (3) the proportion of a toluene-insoluble portion of the particles is 20 to 90 % by weight, (4) the polymer particles have a melt flow rate at 180 °C under 10 kgf/cm2 of 0.1 to 1 g/10 min., (5) the inside layer of the two polymer layers is composed of a crosslinked polymer and (6) the outside layer of the two polymer layers is composed of a non-crosslinked polymer. This invention also provides hollow crosslinked polymer par- ticles wherein the proportion of a toluene-insoluble portion of the particles exceeds 85 % by weight, the melt flow rate of the polymer particles at 180 °C under 10 kgf/cm2 is less than 0.2 9/10 min., and the outside layer is composed of a crosslinked polymer. The hollow polymer particles are useful, for example, as a pigment, and for a paper coating composition and a general-purpose coating composition.
591870
Kawahashi Nobuo
Sakurai Fujio
Tadenuma Hiroshi
Jsr Corporation
Smart & Biggar
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