Last update 23 March 2017
A polyester is defined as a chemical substance meeting the definition of polymer in the Act with polymer molecules containing at least two carboxylic acid ester linkages, at least one of which links internal monomer units.
Polyesters manufactured from an approved list of monomers or other reactants are eligible for notification as PLCs, provided they satisfy all other PLC criteria. This provision is independent of the NAMW.
The list of approved monomers and other reactants from which polyester may be made is in the table below.
A number of reactants on this list are not on the Australian Inventory of Chemical Substances (AICS). Therefore, the manufacture of polyesters from these reactants cannot be carried out in Australia without notification to and assessment of the reactants by NICNAS.
On the other hand, polyesters manufactured from these reactants overseas could be imported, as the reactant itself would not be introduced.
Note: Polyesters manufactured from the anhydride of an acid on the polyester list—for example, succinic anhydride (butanedioic acid)—are allowed, provided there are no pendant anhydrides in the polymer.
In summary, certain polyesters will not be eligible for notification as PLCs, including:
- biodegradable polyesters, which do not meet the degradation criterion
- water-absorbing polyesters
- polyesters manufactured from any monomer or other reactant not on the list of allowable reactants, including such a reactant at <2%.
List of approved monomers and other reactants from which polyesters may be made
Monobasic acids and natural oils
Fats and glyceridic oils, anchovy
Fats and glyceridic oils, babassu
Fats and glyceridic oils, herring
Fats and glyceridic oils, menhaden
Fats and glyceridic oils, sardine
Fats and glyceridic oils, oiticica
Fatty acids, C16-18 and C18-unsaturated
Fatty acids, castor-oil
Fatty acids, coco
Fatty acids, dehydrated castor-oil
Fatty acids, linseed oil
Fatty acids, safflower oil
Fatty acids, soya
Fatty acids, sunflower oil
Fatty acids, sunflower-oil, conjugated
Fatty acids, tall-oil
Fatty acids, tall-oil, conjugated*
Fatty acids, vegetable oil
Glycerides, C16-18 and C18-unsaturated
Hexanoic acid, 3,3,5-trimethyl-
Linseed oil, oxidized
Oils, palm kernel
Di and tri basic acids
1,3-Benzenedicarboxylic acid, dimethyl ester
1,4-Benzenedicarboxylic acid, diethyl ester
1,4-Benzenedicarboxylic acid, dimethyl ester
Butanedioic acid, diethyl ester
Butanedioic acid, dimethyl ester
2-Butenedioic acid (E)-
Decanedioic acid, diethyl ester
Decanedioic acid, dimethyl ester
Fatty acids, C18-unsaturated, dimers
Heptanedioic acid, dimethyl ester
Hexanedioic acid, dimethyl ester
Hexanedioic acid, diethyl ester
Nonanedioic acid, dimethyl ester
Nonanedioic acid, diethyl ester
Octanedioic acid, dimethyl ester
Pentanedioic acid, dimethyl ester
Pentanedioic acid, diethyl ester
2-Propen-1-ol, polymer with ethenylbenzene
Acetic acid, 2,2´-oxybis-
Cyclohexanol, 4,4´-(1-methylethylidene) bis
Methanol, hydrolysis products with trichlorohexylsilane and trichlorophenylsilane
Phenol, 4,4´-(1-methylethylidene)bis-, polymer with 2,2´-[(1-methylethylidene)bis(4,1-phenyleneoxymethylene)]bis[oxirane]
Siloxanes and Silicones, dimethyl, diphenyl, polymers with phenyl silsesquioxanes, methoxy-terminated
Siloxanes and Silicones, dimethyl, methoxy phenyl, polymers with phenyl silsesquioxanes, methoxy-terminated
Siloxanes and Silicones, methyl phenyl, methoxy phenyl, polymers with phenyl silsesquioxanes, methoxy- and phenyl-terminated
Silsesquioxanes, phenyl propyl
*Designates chemical substance of unknown or variable composition, complex reaction products, and biological materials (UVCB substances). The CAS Registry Numbers for UVCB substances are not used in chemical abstracts and its indexes.
**1-Butanol may not be used in a substance manufactured from fumaric or maleic acid because of potential risks associated with esters which may be formed by reaction of these reactants.