Chlorosulfonated polyethylene latex
AssigneeSumitomo Seika Chemicals Co., Ltd.
InventorsJun Sakata, Hiromasa Miyazaki, Taiji Matsukawa
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Abstract
A chlorosulfonated polyethylene latex, which is safe for living bodies and the environment and can be used as a latex component in a resorcin-formalin-latex adhesive, contains an aqueous dispersion medium, chlorosulfonated polyethylene, and an emulsifying agent of a polyoxyalkylene alkyl ether sulfate of formula (I) below and a fatty acid salt. The latex is excellent in standing stability and mechanical stability. In formula (I), R1, R2, n, and M represent an alkyl group of 6 to 20 carbon atoms, hydrogen or a methyl group, an integer of 2 to 40, and an alkali metal, respectively. R1—O—(CH2CHR2—O)n—SO3M (I)
Claims12
A chlorosulfonated polyethylene latex, comprising:
- an aqueous dispersion medium,
- chlorosulfonated polyethylene,
- 0.3 to 12 parts by mass of a polyoxyalkylene alkyl ether sulfate represented by formula (I)
- R1—O—(CH2CHR2—O)n—SO3M (I)
- wherein R1 represents an alkyl group of 6 to 20 carbon atoms, R2 represents hydrogen or a methyl group, n represents an integer of 2 to 40, and M represents an alkali metal relative to 100 parts by mass of the chlorosulfonated polyethylene, and
- 0.1 to 2.5 parts by mass of a fatty acid salt relative to 100 parts by mass of the chlorosulfonated polyethylene.
A method for producing a chlorosulfonated polyethylene latex, comprising the steps of:
- dispersing chlorosulfonated polyethylene dissolved in an organic solvent in an aqueous dispersion medium in the presence of a fatty acid salt and a polyoxyalkylene alkyl ether sulfate represented by formula (I)
- R1—O—(CH2CHR2—O)n—SO3M (I)
- wherein R1 represents an alkyl group of 6 to 20 carbon atoms, R2 represents hydrogen or a methyl group, n represents an integer of 2 to 40, and M represents an alkali metal, thereby forming an emulsion, and
- removing the organic solvent from the emulsion,
- wherein 0.3 to 12 parts by mass of the polyoxyalkylene alkyl ether sulfate and 0.1 to 2.5 parts by mass of the fatty acid salt are used, relative to 100 parts by mass of the chlorosulfonated polyethylene.
Dependencies are inferred from the claim text.