Polyester resin compositions for calendering

• US 6,551,699 B1
• Filed: 05/22/2000
• Issued: 04/22/2003
• Est. Priority Date: 03/17/1998
• Status: Active Grant

• Current Assignee: Eastman Chemical Company
• Original Assignee: Eastman Chemical Company
• Inventors: Flynn, Paul Mary
• Primary Examiner(s): Acquah, Samuel A.
• Application Number:
  US09/576,425
• Time in Patent Office: 1,065 Days
• Field of Search: 528/272, 528/307, 528/308.6, 525/437, 524/753, 524/773, 264/173.1, 264/173.18, 264/175, 428/221, 428/327, 428/480
• US Class Current: 428/221
• CPC Class Codes: C08G 63/181 Acids containing aromatic rings
• CPC Class Codes: C08J 2367/02 Polyesters derived from dicarboxylic acids and dihydroxy compounds; C08J2367/06 takes precedence
• CPC Class Codes: C08J 5/18 Manufacture of films or sheets
• CPC Class Codes: C08K 5/0008 Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
• CPC Class Codes: C08K 5/20 Carboxylic acid amides
• CPC Class Codes: C08L 67/00 Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain of polyester-amides C08L77/12; of polyester-imides C08L79/08; Compositions of derivatives of such polymers
• CPC Class Codes: C08L 67/02 Polyesters derived from dicarboxylic acids and dihydroxy compounds C08L67/06 takes precedence
• CPC Class Codes: Y10T 428/24355 Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]
• CPC Class Codes: Y10T 428/24372 Particulate matter
• CPC Class Codes: Y10T 428/24405 Polymer or resin [e.g., natural or synthetic rubber, etc.]
• CPC Class Codes: Y10T 428/24413 Metal or metal compound
• CPC Class Codes: Y10T 428/249921 Web or sheet containing structurally defined element or component
• CPC Class Codes: Y10T 428/254 Polymeric or resinous material
• CPC Class Codes: Y10T 428/31786 Of polyester [e.g., alkyd, etc.]

Abstract

A polyester resin composition is calendered to produce a film or a sheet. The polyester resin composition is a polyester having a crystallization half time from a molten state of at least 5 minutes combined with an additive for preventing sticking of the polyester to calendering rolls.

Claims

1. A calendered sheet made by a process comprising the step of calendering a polyester resin composition comprising (a) a polyester which comprises (i) a terephthalic acid residue component and (ii) a diol residue component comprising ethylene glycol and 1,4-cyclohexanedimethanol, and (b) a fatty ester.

2. A calendered sheet according to claim 1, wherein said polyester resin composition comprises (a) a polyester which comprises (i) a terephthalic acid residue component and (ii) a diol residue component which is 69 mole % ethylene glycol and 31 mole % 1,4-cyclohexanedimethanol, and (b) a fatty ester.

3. A calendered sheet according to claim 2, wherein said polyester resin composition comprises glycerol monostearate.

4. A calendered sheet according to claim 3, wherein said polyester resin composition comprises 1 wt % glycerol monostearate, based on the total wt % of the polyester resin composition.

5. A transaction card or a security card formed from a calendered sheet according to claim 2.