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Universal primer compositions and methods

  • US 7,956,151 B2
  • Filed: 11/13/2009
  • Issued: 06/07/2011
  • Est. Priority Date: 04/24/2007
  • Status: Active Grant
First Claim
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1. A composition comprising a product of a reaction of i) an additive that includes the reaction product of a) a first reaction product of at least one isocyanate including a thiophosphate and a silane selected from an amino-least one isocyanate including a thiophosphate and a silane selected from an amino-silane, a mercapto-silane, or a combination thereof;

  • and b) a second reaction product that is an isocyanate functional prepolymer with an isocyanate content greater than about 1%, which is a reaction product of a polyol having a functionality of greater than about 2 and a molecular weight (Mn) greater than about 300 and an aromatic isocyanate wherein the polyol consists essentially of polyether polyols, polyester polyols, poly(alkylene carbonate)polyols, hydroxyl-containing polythioethers, polymer polyols, and mixtures thereof; and

    ii) with at least one base primer composition that includes a prepolymer derived from the reaction of at least one aliphatic polyisocyanate and a polyol, and is at least partially reacted with an amino group of an aminosilane, wherein the aminosilane includes a plurality of alkoxy groups bound to silicon.

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