Patent ID: 6127512
Filing Date: 2000-10-03
Classification: C08K,C08L

Abstract:
Polyester pellet composition comprising a polyhydroxyalkanoate (PHA) having a molecular weight (Mw) of greater than about 470,000 and a plasticizing quantity of at least one plasticizer selected from the group consisting of:A. high boiling point esters selected from:(i) phthalates and isophthalates of the formula: ##STR8## where R.sub.1 is C.sub.1-20 alkyl cycloalkyl or benzyl; (ii) citrates of the formula: ##STR9## where R.sub.1 is hydrogen or C.sub.1-10 alkyl, and R.sub.2 is C.sub.1-10 alkyl, C.sub.1-10 alkoxy or C.sub.1-10 alkoxyalkyl;(iii) adipates of the formula R.sub.1 --O--C(O)--(CH.sub.2).sub.4 --C(O)--OR.sub.2 where R.sub.1 and R.sub.2 which may be the same or different are C.sub.2-12 alkyl or C.sub.2-12 alkoxyalkyl;(iv) sebacates of the formula R.sub.1 --C(O)--(CH.sub.2).sub.8 --C(O)--O--R.sub.1 where R.sub.1 is C.sub.2-15 alkyl or C.sub.2-15 alkoxyalkyl;(v) azelates of the formula R.sub.1 --O--C(O)--(CH.sub.2).sub.7 --C(O)--R.sub.1 where R.sub.1 is C.sub.2-12 alkyl, benzyl, or C.sub.2-12 alkoxyalkyl;B. alkyl ethers/esters of the formula R.sub.2 --(O)--CH.sub.2 --CH.sub.2).sub.n --O--R.sub.1 where R.sub.1 is alkyl or --C(O)--alkyl, R.sub.2 is alkyl and n is 2 to 100; or where R.sub.1 is hydrogen and either: R.sub.2 is alkylphenyl where the alkyl is C.sub.2-12 alkyl, and n is 1 to 100; or R.sub.2 is CH.sub.3 --(CH.sub.2).sub.10 --C(O)-- and n is 5, 10, or R.sub.2 is CH.sub.3 --(CH.sub.2).sub.7 CH.dbd.CH--(CH.sub.2).sub.7 --C(O)-- and n is 5 or 15;C. epoxy derivatives of the formula CH.sub.3 --(CH.sub.2).sub.n --A--(CH.sub.2).sub.n --R in which the A is an alkene containing one or more double bonds (i.e. unsaturated fatty acids), n is 1 to 25 and R is C.sub.2-15 alky; or epoxy derivatives of triglycerides containing one or more double bonds per fatty acid chain with chain lengths from C.sub.6-26.D. substituted fatty acids selected from the group consisting of sorbitan monolaurate, sorbitan monooleate, poly(oxyethylene)(20)Sorbitan monolaurate, poly(oxyethylene)(4)lauryl ether, and butyl acetyl ricinoleate; andE. polymeric esters of the formula --O--C(O)--R.sub.1 --C(O)--O--R.sub.2 --O-- in which R.sub.1 and R.sub.2 are both independently C.sub.2-12 alkylene, or R.sub.2 may be derived from a diol.