Thermoplastic resin composition and production process thereof

Abstract

Disclosed is a thermoplastic resin composition contains including a methacrylic resin having a ring structure in a main chain thereof and a glass transition temperature of 110° C. or higher, and at least one kind of metal compound selected from metal salts, metal complexes, and metal oxides, wherein a content of the metal compound in the composition is from 10 to 10,000 ppm in terms of metal atom based on a mass of the methacrylic resin, and a process for producing such a thermoplastic resin composition, the process including carrying out, when preparing a methacrylic resin having a ring structure in a main chain thereof and a glass transition temperature of 110° C. or higher, cyclization condensation reaction using a catalyst to form the ring structure; and then adding a deactivator of the catalyst.

Description

Claims

1. A thermoplastic resin composition comprising a methacrylic resin having a ring structure in a main chain thereof and a glass transition temperature of 110° C. or higher, and at least one kind of metal compound selected from metal salts, metal complexes, and metal oxides, wherein a content of the metal compound in the composition is from 10 to 10,000 ppm in terms of metal atom based on a mass of the methacrylic resin.

2. The thermoplastic resin composition according to claim 1, wherein the metal compound is a salt of a representative metal element.

3. The thermoplastic resin composition according to claim 2, wherein the representative metal element is calcium, magnesium, or zinc.

4. The thermoplastic resin composition according to claim 1, wherein the composition comprises an organic acid.

5. The thermoplastic resin composition according to claim 1, wherein the metal compound is a metal salt of an organic acid.

6. The thermoplastic resin composition according to claim 5, wherein the metal salt of an organic acid is a metal salt of a carboxylic acid or an organophosphorus compound.

7. The thermoplastic resin composition according to claim 1, wherein a number of bubbles generated when the composition is heated at 260° C. for 20 minutes is 20 pieces/g or smaller.

8. The thermoplastic resin composition according to claim 1, wherein the methacrylic resin has a lactone ring-containing structure.

9. The thermoplastic resin composition according to claim 1, wherein the methacrylic resin has a lactone ring structure shown by following formula (1):

10. A process for producing a thermoplastic resin composition according to claim 1, the process comprising carrying out, when preparing a methacrylic resin having a ring structure in a main chain thereof and a glass transition temperature of 110° C. or higher, cyclization condensation reaction using a catalyst to form the ring structure; and then adding a deactivator of the catalyst.