Please download the dossier by clicking on the dossier button x
×

Polyurethane elastomers

  • US 8,361,272 B2
  • Filed: 06/27/2007
  • Issued: 01/29/2013
  • Est. Priority Date: 07/08/2006
  • Status: Active Grant
First Claim
Patent Images

1. A controlled release composition, which comprises a water-swellable linear polymer obtained by reacting together(a) a polyethylene glycol or polypropylene glycol;

  • (b) a PEG-PPG-PEG or PPG-PEG-PPG block copolymer;

    (c) a diol; and

    (d) a difunctional isocyanate,together with an active agent;

    wherein the molar ratio of the components (a), (b), (c) and (d) is in the range 0.01-1 to 0.01-1 to 1 to 1.02-3, respectively.

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