Resin composition
AssigneesTeijin Limited, WinTech Polymer Ltd.
InventorsRyuji Nonokawa, Shinichiro Shoji, Shinya Yamada, Kouichi Sakata, Kazuya Goshima
Life of this patent
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Abstract
A resin composition including an aromatic polyester resin and having high levels of hydrolysis resistance and moldability is provided. The resin composition includes an aromatic polyester resin having a terminal carboxyl group content of not more than 30 eq/ton (component A), a cyclic carbodiimide compound having at least two carbodiimide rings, each having only one carbodiimide group (component B), and a polyvalent hydroxyl group-containing compound having a hydroxyl value of not less than 200 (component C).
Claims9
A resin composition comprising:
- (A) an aromatic polyester resin having a terminal carboxyl group content of not more than 30 eq/ton (component A),
- (B) a cyclic carbodiimide compound having at least two carbodiimide rings, each having only one carbodiimide group (component B), and
- (C) a polyvalent hydroxyl group-containing compound which is at least one selected from the group consisting of a glycerin fatty acid ester and an ether obtained by addition polymerizing alkylene oxide with diglycerin, and having a hydroxyl value of not less than 200 mg KOH/g (component C),
- wherein the content of the component B is 0.5 to 1.5 parts by mass based on 100 parts by mass of the component A,
- wherein the content of the component C is 0.5 to 1.0 part by mass based on 100 parts by mass of the component A, and
- wherein the component C has a hydroxyl value of not more than 600 mg KOH/g.
A method of producing a resin composition which comprises:
- (A) an aromatic polyester resin having a terminal carboxyl group content of not more than 30 eq/ton (component A),
- (B) a cyclic carbodiimide compound having at least two rings, each having only one carbodiimide group (component B), and
- (C) a polyvalent hydroxyl group-containing compound which is at least one selected from the group consisting of a glycerin fatty acid ester and an ether obtained by addition polymerizing alkylene oxide with diglycerin, and having a hydroxyl value of not less than 200 mg KOH/g (component C),
- wherein the content of the component B is 0.5 to 1.5 parts by mass based on 100 parts by mass of the component A,
- wherein the content of the component C is 0.5 to 1.0 part by mass based on 100 parts by mass of the component A, and
- wherein the component C has a hydroxyl value of not more than 600 mg KOH/g, comprising the step of:
- (i) melt kneading together the aromatic polyester resin (component A) and the polyvalent hydroxyl group-containing compound (component C) and then adding and melt kneading the cyclic carbodiimide compound (component B) with the obtained mixture;
- or
- (ii) adding the cyclic carbodiimide compound (component B) and the polyvalent hydroxyl group-containing compound (component C) to the aromatic polyester resin (component A) at the same time and melt kneading them together.
Dependencies are inferred from the claim text.