Crystallizable shrinkable films and thermoformable sheets made from reactor grade resins
AssigneeEastman Chemical Company
InventorsMark Allen Peters, Jacob E. Napierala, Rondell Paul Little, JR., James Carl Williams
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Abstract
The present disclosure relates to crystallizable shrinkable films and thermoformable sheets comprising amorphous polyester compositions which comprise residues of terephthalic acid, neopentyl glycol (NPG), 1,4-cyclohexanedimethanol (CHDM), ethylene glycol (EG), and diethylene glycol (DEG), in certain compositional ranges having certain advantages and improved properties including recyclability.
Claims20
A crystallizable film comprising a polyester composition comprising:
- at least one polyester which comprises:
- (a) a dicarboxylic acid component comprising:
- (i) 70 to 100 mole % of terephthalic acid residues;
- (ii) 0 to 30 mole % of aromatic and/or aliphatic dicarboxylic acid residues having up to 20 carbon atoms;
- and
- (b) a diol component comprising:
- 75 mole % or greater of ethylene glycol residues and
- 25 mole % or less of other glycols comprising:
- (i) 0.1 to less than 24 mole % of neopentyl glycol residues;
- (ii) from greater than 0 to less than 24 mole % of 1,4-cyclohexanedimethanol residues;
- (iii) 1 to less than 10 mole % of total diethylene glycol residues in the final polyester composition;
- wherein the total mole % of the dicarboxylic acid component is 100 mole %, and
- wherein the total mole % of the diol component is 100 mole %.
A crystallizable film comprising a polyester composition comprising:
- at least one polyester which comprises:
- (a) a dicarboxylic acid component comprising:
- (i) 70 to 100 mole % of terephthalic acid residues;
- (ii) 0 to 30 mole % of aromatic and/or aliphatic dicarboxylic acid residues having up to 20 carbon atoms;
- and
- (b) a diol component comprising:
- 80 mole % or greater of ethylene glycol residues and
- 20 mole % or less of other glycols comprising:
- (i) 5 to less than 17 mole % of neopentyl glycol residues;
- (ii) 2 to less than 10 mole % of 1,4-cyclohexanedimethanol residues;
- (iii) 1 to less than 5 mole % of total diethylene glycol residues in the final polyester composition;
- wherein the total mole % of the dicarboxylic acid component is 100 mole %, and wherein the total mole % of the diol component is 100 mole %.
A crystallizable film comprising a polyester composition comprising:
- at least one polyester which comprises:
- (a) a dicarboxylic acid component comprising:
- (i) 70 to 100 mole % of terephthalic acid residues;
- (ii) 0 to 30 mole % of aromatic and/or aliphatic dicarboxylic acid residues having up to 20 carbon atoms;
- and
- (b) a diol component comprising:
- (i) 1 to 30 mole % of neopentyl glycol residues;
- (ii) 1 to less than 30 mole % of 1,4-cyclohexanedimethanol residues;
- and
- (iii) 1.5 to 6 mole % residues of diethylene glycol;
- and wherein the remainder of the glycol component comprises:
- (iv) residues of ethylene glycol, and
- (v) 0 to 20 mole % of the residues of at least one modifying glycol;
- wherein the total mole % of the dicarboxylic acid component is 100 mole %, and
- wherein the total mole % of the glycol component is 100 mole %.
Dependencies are inferred from the claim text.