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Patent Searching and Data


Title:
AQUEOUS POLYESTER DISPERSION AND PROCESS FOR PRODUCING THE SAME
Document Type and Number:
WIPO Patent Application WO/2001/002490
Kind Code:
A1
Abstract:
An aqueous polyester dispersion which is excellent in properties such as water resistance, weatherability, processability, and adhesion, has a high degree of freedom of liquid property regulation by a post-treatment, and can be advantageously dried and converted into a powder; and a process for efficiently producing the aqueous dispersion with ease at low cost. The aqueous polyester dispersion contains a water-insoluble polyester (i) and a polyester (ii) containing sulfonate groups bonded to the polymer in a concentration of 0.1 to 1.5 mmol in terms of SO¿3??-¿ amount per g of the polymer. The process for producing an aqueous polyester dispersion comprises a step in which a resin material comprising the water-insoluble polyester (i) and the polyester (ii) is melt-kneaded and a step in which water or a basic aqueous solution is added to the kneaded resin to disperse it into the aqueous medium and thereby convert it into an aqueous dispersion.

Inventors:
Okada, Yasuo (Mitsui Chemicals, Inc. 1-2, Waki 6-chome Waki-cho Kuga-gun Yamaguchi, 740-0061, JP)
Kaya, Hidenori (Mitsui Chemicals, Inc. 1-2, Waki 6-chome Waki-cho Kuga-gun Yamaguchi, 740-0061, JP)
Tokita, Suguru (Mitsui Chemicals, Inc. 1-2, Waki 6-chome Waki-cho Kuga-gun Yamaguchi, 740-0061, JP)
Application Number:
PCT/JP2000/004332
Publication Date:
January 11, 2001
Filing Date:
June 30, 2000
Export Citation:
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Assignee:
MITSUI CHEMICALS, INC. (2-5 Kasumigaseki 3-chome Chiyoda-ku Tokyo, 100-6070, JP)
Okada, Yasuo (Mitsui Chemicals, Inc. 1-2, Waki 6-chome Waki-cho Kuga-gun Yamaguchi, 740-0061, JP)
Kaya, Hidenori (Mitsui Chemicals, Inc. 1-2, Waki 6-chome Waki-cho Kuga-gun Yamaguchi, 740-0061, JP)
Tokita, Suguru (Mitsui Chemicals, Inc. 1-2, Waki 6-chome Waki-cho Kuga-gun Yamaguchi, 740-0061, JP)
International Classes:
C08J3/03; C08L67/02; (IPC1-7): C08L67/02
Foreign References:
JPH08295792A
JPH03234760A
Other References:
See also references of EP 1123947A1
Attorney, Agent or Firm:
Nakajima, Shigemitsu (Nichiyo Building 3F 11-12, Kanda Mitoshiro-cho Chiyoda-ku Tokyo, 101-0053, JP)
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