PROCESS FOR PREPARING COPOLYESTERS OF TEREPHTHALIC ACID, ETHYLENE GLYCOL, AND 1,4-CYCLOHEXANEDIMETHANOL EXHIBITING A NEUTRAL HUE, HIGH CLARITY AND INCREASED BRIGHTNESS

PROCESS FOR PREPARING COPOLYESTERS OF TEREPHTHALIC ACID, ETHYLENE GLYCOL, AND 1,4-CYCLOHEXANEDIMETHANOL EXHIBITING A NEUTRAL HUE, HIGH CLARITY AND INCREASED BRIGHTNESS

This application relates to a three step process for preparing copolyesters exhibiting a neutral hue, high clarity and increased brightness. The process involves reacting terephthalic acid, ethylene glycol, and 1,4-cyclohexanedimethanol in a feed mole ratio of total glycols to dicarboxylic acid of 1...

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Hauptverfasser: ADAMS, VALERIE, SUE, HATAWAY, JAMES, EARL, ROBERTS, KENNETH, ALAN
Format: Patent
Sprache:eng ; fre ; ger
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CHEMISTRY
COMPOSITIONS BASED THEREON
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
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creator ADAMS, VALERIE, SUE
HATAWAY, JAMES, EARL
ROBERTS, KENNETH, ALAN
description This application relates to a three step process for preparing copolyesters exhibiting a neutral hue, high clarity and increased brightness. The process involves reacting terephthalic acid, ethylene glycol, and 1,4-cyclohexanedimethanol in a feed mole ratio of total glycols to dicarboxylic acid of 1.7:1 to 6.0:1 at a temperature of 240 DEG C to 280 DEG C, and a pressure of 15 psig (200 kPa) to 80 psig (650 kPa) to form an esterification product; adding a polycondensation catalyst and a toner; and polycondensing the product at a temperature of 260 DEG C to 290 DEG c and a reduced pressure to form a high molecular weight copolyester.
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subjects CHEMISTRY
COMPOSITIONS BASED THEREON
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
title PROCESS FOR PREPARING COPOLYESTERS OF TEREPHTHALIC ACID, ETHYLENE GLYCOL, AND 1,4-CYCLOHEXANEDIMETHANOL EXHIBITING A NEUTRAL HUE, HIGH CLARITY AND INCREASED BRIGHTNESS
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