| 摘要 |
PCT No. PCT/GB95/02150 Sec. 371 Date Jun. 16, 1997 Sec. 102(e) Date Jun. 16, 1997 PCT Filed Sep. 8, 1995 PCT Pub. No. WO96/07697 PCT Pub. Date Mar. 14, 1996A polymer composition comprises (a) a stereospecific, preferably fermentation derived, polyester of molecular weight Mw over 100000 consisting of repeating units of formula -O-CmHn-CO- in which n=2m and units with m=3 and m=4 with respectively a C1 and C2 side group on the carbon atom next to oxygen in the polymer chain are copolymerised together, m being 3 in 70-95 mol percent of such units; and (b) at least one alkyl phenol in which the alkyl group preferably contains at least one tertiary carbon atom adjacent to or within 4 carbon atoms of the phenol nucleus. The alkyl phenol may be hindered and may contain a C1-6 alkoxy group para to the phenolic hydroxy group. Suitable alkyl phenols include 2-tert-butyl-4-hydroxy-anisole and alpha- or delta- tocopherol and others usable as antioxidants in foods, oils and polymer systems. The polyester and alkyl phenol and relative proportions thereof are preferably chosen to provide inhibition of crystallisation of the polyester corresponding to an Avrami 'k' parameter less than 0.03.
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