C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
C08L 67/02 (2006.01) C08G 63/80 (2006.01) C08G 63/88 (2006.01) C08K 5/15 (2006.01) C08K 5/156 (2006.01)
Patent
CA 2293673
Polyester blends of polyethylene terephthalate and polyethylene isophthalate coated with an alkylene carbonate such as ethylene carbonate or propylene carbonate crystallize more quickly and at lower temperature than uncoated pellets, reducing the tendency of the pellets to stick together during the crystallization process prior to solid-state polymerization.
Cette invention concerne des mélanges polyesters de polyéthylène téréphtalate et de polyéthylène isophtalate enrobés d'un carbonate d'alkylène, tel que du carbonate d'éthylène ou du carbonate de propylène. Ces mélanges cristallisent plus rapidement et à une température inférieure à la température de cristallisation de pastilles non enrobées. Ainsi, on réduit la tendance qu'ont les pastilles à se coller les unes aux autres au cours du processus de cristallisation précédant la polymérisation à l'état solide.
Peseta Patrick Joseph
Schirmer Joseph Peter
Tung William Chung Tsing
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
Shell Internationale Research Maatschappij B.v.
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