Aqueous polyamide resin dispersion and process for producing the same
AssigneeSumitomo Seika Chemicals Co., Ltd.
InventorsEiichi Araki, Norihiro Sugihara, Kaichiro Nakao, Hiroshi Manabe
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Abstract
The aqueous dispersion of polyamide resin of the present invention comprises dispersed polyamide resin particles, basic material and water. The dispersed polyamide resin particles have a weight-average diameter of 0.1-10 μm. The ratio of end carboxyl groups to end amino groups in the polyamide resin is between 60/40 and 100/0. The amount of said basic material added is 0.2-3.0 mol per mol of end carboxyl groups. Such an aqueous dispersion of polyamide resin can be manufactured by adding the polyamide resin to an aqueous dispersion medium containing 0.2-3.0 mol of basic material per mol of end carboxyl groups in the polyamide resin.
Claims13
An aqueous dispersion of polyamide resin, comprising:
- dispersed polyamide resin particles, basic material and water;
- wherein the weight average diameter of said dispersed polyamide resin particles is 0.1-10 μm;
- the ratio of end carboxyl groups to end amino groups in said polyamide resin ranges from 66/34 to 92/8;
- the amount of said end carboxyl groups is 90-170 mmol per kg of said polyamide resin;
- the amount of said basic material added is 0.2-3.0 mol per mol of said end carboxyl groups;
- and
- said polyamide resin has as a structural unit at least one selected from the group consisting of —[NH(CH2)5CO]—, —[NH(CH2)6NHCO(CH2)4CO]—, —[NH(CH2)6NHCO(CH2)8CO]—, —[NH(CH2)10CO]— and —[NH(CH2)11CO]—.
A method of manufacturing an aqueous dispersion of polyamide resin, comprising the steps of:
- adding polyamide resin to an aqueous dispersion medium containing 0.2-3.0 mol of basic material per mol of end carboxyl groups in said polyamide resin, and causing said polyamide resin to disperse in said dispersion medium as polyamide resin particles;
- wherein the weight average diameter of said dispersed polyamide resin particles is 0.1-10 μm;
- the ratio of end carboxyl groups to end amino groups in said polyamide resin ranges from 66/34 to 92/8;
- the amount of said end carboxyl groups is 90-170 mmol per kg of said polyamide resin;
- and
- said polyamide resin has as a structural unit at least one selected from the group consisting of —[NH(CH2)5CO]—, —[NH(CH2)6NHCO(CH2)4CO]—, —[NH(CH2)6NHCO(CH2)8CO]—, —[NH(CH2)10CO]— and —[NH(CH2)11CO]—.
Dependencies are inferred from the claim text.