Catalyst for Producing Polyester and Method for Producing Polyester
AssigneeToray Industries, Inc.
InventorsHua Qi, Keisuke Honda, Kunihiro Morimoto, Jun Sakamoto, Hiroji Kojima
Life of this patent
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Abstract
The invention relates to an improved linear microdialysis probe comprising a continuous length of flexible tubing (1) having at least one window (4) formed therein, said window covering at least one pan of the circumference of the tubing, while the remaining part forms at least one unbroken connection between a first end of said tubing and a second end of said tubing, said ends adapted to be attached to an inlet for perfusion liquid and the other end forming an outlet for the dialysate, said at least one window (4) exposing a tubular semipermeable membrane (2).
Claims15
A catalyst for producing a polyester by polymerization-reacting aromatic dicarboxylic acid or a derivative thereof and an aliphatic diol, comprising a titanium compound, and a phosphorus compound of the following formula (1):
- wherein, R1, R2, R3 and R4 are each an alkyl group, a cycloalkyl group, an alkyl-substituted benzene group, or a benzyl group carbon number of which is 4 to 25.
A method for producing a polyester comprising adding a phosphorus compound represented by the following formula (2) to a reaction system, in a method for obtaining a polyester comprising esterification or transesterification-reacting dicarboxylic acid or an ester-forming derivative thereof, and a diol or an ester-forming derivative thereof, and polycondensing this in the presence of a titanium-based polycondensation catalyst:
- in the formula (2), X represents a hydrocarbon group of a carbon number of 1 to 10, or sulfur, the hydrocarbon group may contain one or more of an alicyclic structure, an aromatic ring structure and a double bond, or may contain a substituent, R5 to R8 each represent independently a group selected from the group consisting of a hydroxy group, a hydrocarbon group of a carbon number of 1 to 30, and an alkoxy group of a carbon number of 1 to 30, the hydrocarbon group may contain one or more structures selected from the group consisting of an alicyclic structure, an aliphatic branched structure, an aromatic ring structure and a double bond, R9 to R12 each represent independently a group selected from the group consisting of a hydroxy group, a hydrocarbon group of a carbon number of 1 to 10, and an alkoxy group of a carbon number of 1 to 10, the hydrocarbon group may contain one or more structures selected from the group consisting of an alicyclic structure, an aliphatic branched group, an aromatic ring structure and a double bond, and a+b, and c+d are each an integer of 0 to 4.
An agent for preventing coloration of a polyester represented by the formula (3):
- in the formula (3), R5 to R8 each represent independently a group selected from the group consisting of a hydroxy group, a hydrocarbon group of a carbon number of 1 to 30, and an alkoxy group of a carbon number of 1 to 30, the hydrocarbon group may contain one or more structures selected from the group consisting of an alicyclic structure, an aliphatic branched structure, an aromatic ring structure and a double bond, R9 to R12 each represent independently a group selected from the group consisting of a hydroxy group, a hydrocarbon group of a carbon number of 1 to 10, and an alkoxy group of a carbon number of 1 to 10, the hydrocarbon group may contain one or more structures selected from the group consisting of an alicyclic structure, an aliphatic branched structure, an aromatic ring structure and a double bond, and a+b, and c+d are each an integer of 0 to 4, R13 and R14 each represent hydrogen or a hydrocarbon group of a carbon number of 1 to 10, the hydrocarbon group may contain one or more structures selected from the group consisting of an alicyclic group, an aliphatic branched structure, an aromatic ring structure and a double bond.
Dependencies are inferred from the claim text.