Invention Application
- Patent Title: POLYCHLOROPRENE LATEX, POLYCHLOROPRENE LATEX COMPOSITION, AND MOLDED ARTICLE
- Patent Title (中): 聚氯乙烯,聚氯乙烯组合物和成型品
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Application No.: US14382478Application Date: 2013-03-01
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Publication No.: US20150152209A1Publication Date: 2015-06-04
- Inventor: Hidehito Otsuka , Kiyoshi Sunada , Kenji Mochizuki , Toru Shiraiwa
- Applicant: DENKI KAGAKU KOGYO KABUSHIKI KAISHA
- Priority: JP2012-046073 20120302
- International Application: PCT/JP2013/055755 WO 20130301
- Main IPC: C08F236/18
- IPC: C08F236/18 ; C08L11/02 ; C08F136/18

Abstract:
An object of the present invention is to provide a polychloroprene latex with improved rubber coagulability that gives a film superior in strength by dip molding, a polychloroprene latex composition, and a molded article. The polychloroprene latex is prepared by polymerization of 2-chloro-1,3-butadiene alone or by polymerization of raw monomers at least containing 2-chloro-1,3-butadiene and 2,3-dichloro1,3-butadiene and has a precipitation rate of 5 to 40%, as calculated according to Equation (I). In Equation (I), A is the mass (g) of the dry product, which is obtained by adding 50 ml of saturated aqueous solution of calcium hydroxide at 23° C. to 50 g of a latex having a solid matter concentration adjusted to 45 to 65 mass % at a liquid temperature of 23° C. over 2 minutes, filtering and collecting the generated precipitate with a 80-mesh wire mesh, and drying the precipitate at 110° C. for 3 hours; B is the mass of the latex before the dropwise addition (50 g); and C is the solid matter concentration (mass %) of the latex before the dropwise addition. Precipitation rate ( % ) = A B × C 100 × 100 ( I )
Public/Granted literature
- US09296849B2 Polychloroprene latex, polychloroprene latex composition, and molded article Public/Granted day:2016-03-29
Information query
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