Title:
VINYL CHLORIDE RESIN GRANULES FOR PASTE PROCESSING AND PROCESS FOR PRODUCING THE SAME
Document Type and Number:
WIPO Patent Application WO/1999/002572
Kind Code:
A1
Abstract:
Vinyl chloride resin granules for paste processing which are spherical agglomerates of primary vinyl chloride resin particles and which have an angle of repose of 30 to 38°, a proportion of spherical granules with a diameter not smaller than 20 $g(m)m of 60 wt.% or larger, an average particle diameter of 35 to 200 $g(m)m, and a bulk density (loose) of 0.59 to 0.65 g/cc. Preferably, the content of undispersible particles in the granules is 0.30 wt.% or lower. The resin granules are produced by a process comprising spray-drying an aqueous vinyl chloride polymer dispersion obtained by emulsion polymerization or fine suspension polymerization and recovering the polymer, wherein fine particles entrained by the discharge air in the spray-drying are removed separately from resin granules having a larger particle diameter.
Inventors:
NAGATOMO YOSHIMITU (JP)
OZAKI TATSUYA (JP)
KONDOU SHOUSUKE (JP)
OZAKI TATSUYA (JP)
KONDOU SHOUSUKE (JP)
Application Number:
PCT/JP1998/003047
Publication Date:
January 21, 1999
Filing Date:
July 07, 1998
Export Citation:
Assignee:
SHIN DAI ICHI VINYL CORP (JP)
NAGATOMO YOSHIMITU (JP)
OZAKI TATSUYA (JP)
KONDO SHOUSUKE (JP)
NAGATOMO YOSHIMITU (JP)
OZAKI TATSUYA (JP)
KONDO SHOUSUKE (JP)
International Classes:
C08F6/00; C08F14/06; C08J3/12; (IPC1-7): C08F14/06; C08F6/00; C08J3/12
Foreign References:
| JPH0672169B2 | 1994-09-14 | |||
| JPS63146907A | 1988-06-18 | |||
| JPS6094409A | 1985-05-27 | |||
| JPS62149726A | 1987-07-03 | |||
| JPS6395204A | 1988-04-26 | |||
| JPH07268020A | 1995-10-17 |
Attorney, Agent or Firm:
Uchida, Yukio (Shiba 2-chome Minato-ku Tokyo, JP)
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