×

MODIFIED COPOLYESTERS AND IMPROVED MULTILAYER REFLECTIVE FILMS

  • US 20090062504A1
  • Filed: 11/10/2008
  • Published: 03/05/2009
  • Est. Priority Date: 01/13/1998
  • Status: Active Grant
First Claim
Patent Images

1. A polymer, comprising:

  • a copolyester having an intrinsic viscosity of about 0.4 dL/g to 0.7 dL/g and comprising glycol subunits and carboxylate subunits,the glycol subunits derived from 70 to 99 mol % C2-C4 diols and about 1 to 30 mol % comonomer glycol subunits derived from 1,6-hexanediol, andthe carboxylate subunits being 5 to 99 mol % naphthalate subunits, 1 to 95 mol % terephthalate or isophthalate subunits or mixtures thereof; and

    0 to 30 mol % of comonomer carboxylate subunits derived from phthalic acid, t-butyl-isophthalic acid, lower alkyl esters of these acids, or a combination thereof;

    wherein at least 0.01 to 2.5 mol % of the combined carboxylate and glycol subunits of the copolyester are derived from compounds having three or more carboxylate, ester, or hydroxy functional groups.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×