Crystalline thermoplastic polyester resin composition for clear transparent products and process thereof
AssigneeFutura Polyesters Limited
InventorsSanjay Tammaji Kulkarni, Balasundaram Dilly Raj
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Abstract
The present invention provides a polyester resin composition comprising alkylene terephthalate, Fast Reheat (FRH) additives, Nucleating additives, aliphatic dicarboxylic acid comonomers or their mixed composition to impart clarity and transparency to the CPET. The invention also relates to a process for the preparation of said thermoplastic composition of clear CPET.
Claims11
A clear PET composition comprising
- [i] PET base resin having Intrinsic Viscosity in the range of 0.95±0.02;
- [ii] aliphatic dicarboxylic acid co-monomers having mass 0.01 to 10% of the mass of the base resin;
- and
- [iii] nucleating agents of particle size ranging from 20 to 10000 nm and having mass of 10 ppm to 12000 ppm, preferably 10 to 9000 ppm of the mass of the base resin.
A process for making a clear PET resin composition comprising the steps of thoroughly dispersing in a PET base resin having unmodified intrinsic viscosity in the range of 0.95±0.02, during or before the process of esterification of the base resin,
- (i) comonomers being at least one compound selected from a group of compounds consisting of malonic, succinic, glutaric and adipic acids in the range of 0.1 and 10 mole % preferably between 0.5 and 2 mole % of the base resin,
- (ii) and nucleating agents being at least one compound selected from from a group of compounds consisting of amorphous nano silicon dioxide, nano talc. alkali and alkaline earth salts of aromatic carboxylic acids like sodium benzoates, salicylates, salts of aliphatic acids like sodium acetates and nano particles of clay having particle size ranging from 20 to 10000 nm and having mass of 10 ppm to 12000 ppm, preferably 10 to 9000 ppm of the mass of the base resin.
A clear PET composition as described herein with reference to the accompanying examples.
11-14. (canceled)
Dependencies are inferred from the claim text.