Method of producing a polyester resin composition

Patent metadata

Field	Value
Publication number	US-9315653-B2
Application number	US-201414223313-A
Country	US
Kind code	B2
Filing date	Mar 24, 2014
Priority date	Mar 9, 2010
Publication date	Apr 19, 2016
Grant date	Apr 19, 2016

Abstract

A polyester resin composition including: a polyester resin; a titanium compound derived from a catalyst; and a phosphorous compound, wherein formula (1): 0.10<Ti/P<0.20 is satisfied wherein Ti/P represents a mass content ratio of titanium element to phosphorus element in the polyester resin composition, and formula (2): 0.0090<ΔIV≦0.0185 (dL/g/hr) is satisfied wherein ΔIV represents an increase in an intrinsic viscosity of the polyester resin composition per hour under conditions of 225° C. and 50 Pa.

First claim

What is claimed is:

1. A method of producing a polyethylene terephthalate resin composition, comprising:
(A) reacting a dicarboxylic acid component and a diol component through an esterification reaction to obtain an esterification reaction product;
(B) performing a polycondensation reaction of the esterification reaction product to obtain a condensation polymerization product; and
adding a phosphorus compound selected from the group consisting of trimethyl phosphate and triethyl phosphate to the reaction mixture from step (A), before the esterification reaction in step (A) is terminated but after an organic chelate titanium complex comprising an acid selected from the group consisting of citric acid, lactic acid, trimellitic acid and malic acid and a compound containing at least one metal selected from the group consisting of an alkali metal, an alkaline earth metal, iron-group metal, manganese, tin, lead and zinc, are added to the reaction mixture from step (A), so as to satisfy the following formula (1) and formula (2):
0.10<Ti/P<0.20  (1)

wherein Ti/P represents a mass content ratio of titanium element to phosphorus element in the polyethylene terephthalate resin composition; and
0.0172<ΔIV≦0.0185 (dL/g/hr)  (2)

wherein ΔIV represents an increase in an intrinsic viscosity of the polyethylene terephthalate resin composition per hour under conditions of 225° C. and 50 Pa;
wherein the addition of the compound containing at least one metal to the reaction mixture from step (A) occurs after the organic chelate titanium complex has been added, and before the esterification reaction in step (A) is terminated.

2. The method of producing a polyethylene terephthalate resin composition according to claim 1 , wherein the addition of the phosphorus compound is performed by adding an addition solution, which is prepared by dissolving the phosphorus compound in a solution containing the diol component at about 25° C.

3. The method of producing a polyethylene terephthalate resin composition according to claim 2 , wherein the content of the phosphorus compound in the addition solution is from 1% by mass to 10% by mass with respect to a total mass of the addition solution.

4. The method of producing a polyethylene terephthalate resin composition according to claim 1 , wherein the polycondensation temperature is 280° C. or lower.

5. The method of producing a polyethylene terephthalate resin composition according to claim 1 , further comprising (C) performing solid-state polymerization of the condensation polymerization product obtained in step (B).

6. The method of producing a polyethylene terephthalate resin composition according to claim 5 , wherein the solid-state polymerization is performed under a pressure of from 1 Pa to 1000 Pa.

7. The method of producing a polyethylene terephthalate resin composition according to claim 5 , wherein the solid-state polymerization is performed in a nitrogen atmosphere.

8. The method of producing a polyethylene terephthalate resin composition according to claim 1 , wherein the mass content ratio of titanium element to phosphorus element is 0.10<Ti/P<0.15.

9. The method of producing a polyethylene terephthalate resin composition according to claim 1 , where the organic chelate titanium complex is a citric acid chelate titanium complex, the phosphorus compound is trimethyl phosphate, and the metal compound is a magnesium compound.

Assignees

• Fujifilm Corp

Inventors

• Takegami Ryuta

Classifications

• H10F19/85

  Protective back sheets · CPC title

• C08L67/00

  Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain (of polyester-amides C08L77/12; of polyester-imides C08L79/08); Compositions of derivatives of such polymers · CPC title

• C08G63/85

  Germanium, tin, lead, arsenic, antimony, bismuth, titanium, zirconium, hafnium, vanadium, niobium, tantalum, or compounds thereof {(C08G63/823 takes precedence)} · CPC title

• C08K5/521 Primary

  Esters of phosphoric acids, e.g. of H3PO4 · CPC title

• C08G63/80

  Solid-state polycondensation · CPC title