Title:
LATEX OF VINYL CHLORIDE-BASED POLYMER HAVING TWO PARTICLE DISTRIBUTIONS AND HAVING HIGH FINE PARTICLE CONTENT, ITS PRODUCTION AND UTILIZATION THEREOF
Document Type and Number:
Japanese Patent JP3145665
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a method for producing a liquid plastisol and a foamed product excellent in foam quality from a same latex by using an alkali metal salt of metabisulfite as a reducing agent.
SOLUTION: This method for producing a latex of a vinyl chloride-based polymer is to use an alkali metal salt of metabisulfite (e.g.; potassium metabisulfite) as a reducing agent in the case of performing a micro suspension polymerization of a corresponding monomer in the presence of (A) a first seed polymer containing at least one kind of an initiator soluble to an organic solvent in particles thereof, (B) a second seed polymer having a smaller mean particle diameter than that of the component (A), water, an anionic emulsifier, a soluble metal salt and a reducing agent by adjusting ≤0.09 molar ratio of the metal salt/the initiator soluble to the organic solvent. Further, it is preferable to perform the reaction in the presence of at least one kind of a water soluble initiator more concretely ammonium persulfate.
Inventors:
Philip Espeyal
Richard Pele
Benoit ernst
Richard Pele
Benoit ernst
Application Number:
JP24466997A
Publication Date:
March 12, 2001
Filing Date:
August 26, 1997
Export Citation:
Assignee:
ATOFINA
International Classes:
C08F2/18; C08F2/24; C08F2/26; C08F2/44; C08F4/00; C08J9/10; C08F4/40; C08F14/00; C08F14/06; C08F259/04; C08J3/02; C08J9/00; C08L27/06; C08L51/06; (IPC1-7): C08F14/06; C08F2/18; C08F259/04; C08J9/00; C08L27/06
Domestic Patent References:
| JP63145352A | ||||
| JP51133387A | ||||
| JP1087707A |
Other References:
【文献】欧州特許出願公開25561(EP,A1)
【文献】仏国特許出願公開2309569(FR,A1)
【文献】仏国特許出願公開2309569(FR,A1)
Attorney, Agent or Firm:
Takashi Koshiba