Title:
AQUEOUS DISPERSION OF VINYL HALIDE COPOLYMER, AND FILM
Document Type and Number:
WIPO Patent Application WO/2022/203075
Kind Code:
A1
Abstract:
This aqueous dispersion of a vinyl halide copolymer is characterized by being synthesized using a method that includes: at least one emulsion polymerization step A, in which the average value of the n-octanol/water partition coefficient (logPow) of a monomer group used as a raw material is 2.2 or less; and at least one emulsion polymerization step B, in which a monomer group used as a raw material contains a vinyl halide monomer and a copolymerizable monomer for which the reactivity ratio r1 with vinylidene chloride is less than 0.7 and in which the mass ratio of the vinyl halide monomer is 60 mass% or more relative to 100 mass% of the monomer group, with the mass ratio of structural units derived from the copolymerizable monomer for which the reactivity ratio r1 is less than 0.7 being 4 mass% or more when the total mass of the polymer synthesized in the step B is taken to be 100 mass%. However, a method in which the average value of the n-octanol/water partition coefficient (logPow) of a monomer group used as a raw material is the same value in all emulsion polymerization steps is not encompassed by the method described above. Moreover, an emulsion polymerization step that corresponds to both step A and step B may be step A or step B.
Inventors:
NAKASHIMA HIROYUKI (JP)
HOSOE NATSUKI (JP)
YAMASAKI NAOAKI (JP)
HOSOE NATSUKI (JP)
YAMASAKI NAOAKI (JP)
Application Number:
PCT/JP2022/014661
Publication Date:
September 29, 2022
Filing Date:
March 25, 2022
Export Citation:
Assignee:
ASAHI CHEMICAL IND (JP)
International Classes:
C09D5/02; C08F2/22; C08F293/00; C09D127/08
Foreign References:
| JP2009541565A | 2009-11-26 | |||
| JP2018127523A | 2018-08-16 | |||
| JP2000302821A | 2000-10-31 |
Other References:
"Partition coefficient (1-octanol/water)-Shake flask method", JAPANESE INDUSTRIAL STANDARD Z7260-107, 2000
INORGANIC MATERIALS, vol. 3, July 1996 (1996-07-01), pages 271 - 283
INORGANIC MATERIALS, vol. 3, July 1996 (1996-07-01), pages 271 - 283
Attorney, Agent or Firm:
SUGIMURA Kenji (JP)
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