Polyester resin for film which is prepared by using a co-catalyst system containing a titanium-rhenium-alkaline earth copolymerized catalyst

• Main Authors: YU, CHUN-FU, PEI, ROU-YUAN
• Format: Patent
• Language: Chinese; English
• Published: 16.07.2018
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; GENERAL PROCESSES OF COMPOUNDING; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; THEIR PREPARATION OR CHEMICAL WORKING-UP; THEIR RELEVANT APPARATUS; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; WORKING-UP

The invention relates to a polyester resin with a low content of oligomer, which is prepared by using a co-catalyst system containing a titanium-rhenium-alkaline earth copolymerized catalyst. The content of oligomer in the polyester resin is 0.5% by weight or less. The invention further relates to a film with a low content of oligomer, which is prepared by the aforementioned polyester.