Patent ID: 11945932
Assignee: KAO CORPORATION
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 10:
11. A method for producing a plasticizer for a halogen-based resin comprising a mixture of didecyl phthalates each comprising a linear or branched C10 alkyl group, wherein the mixture of the didecyl phthalates is obtained by an esterification reaction between a phthalic acid raw material and an alcohol raw material,
the phthalic acid raw material is at least one compound selected from the group consisting of phthalic acid and phthalic anhydride, and comprising the following methods (i) or (ii):
(i) a method of producing the plasticizer by using in the esterification reaction a mixed decanol as a raw material in which a content of n-decanol in the alcohol raw material is precisely controlled such that a content of di-n-decyl phthalate in the plasticizer is not less than 48 mol % and not more than 70 mol % after producing the plasticizer, and
(ii) a method of producing the plasticizer by mixing di-n-decyl phthalate and one or more additional didecyl phthalate(s) other than di-n-decyl phthalate such that a content of the di-n-decyl phthalate in the plasticizer is adjusted to a predetermined value of not less than 48 mol % and not more than 70 mol %.