| abstract |
POLYUREA-URETHANE BIPARTITE ADHESIVE COMPOSITIONS, COMPOSITION OF MATTER AND PROCESS TO JOIN AT LEAST TWO SUBSTRATES. The present invention relates to polyurea-urethane bipartite adhesive compositions comprising a Part A prepolymer component having an isocyanate component comprising polymeric isocyanate and an oligomer content greater than 15 percent by weight, polyol having a molecular weight of about from 5,000 to about 12,000 and about 20 percent by weight to about 44 percent by weight filler; and a Part B curative component comprising polyol having a molecular weight of about 5,000 to about 12,000, aromatic amine, about 20 weight percent to about 44 weight percent filler, and catalyst where the adhesive has a modulus of storage at 85°C greater than about 20 MPa. The polyurea-urethane bipartite adhesive composition can be applied to bond various substrates including composite materials and metal, including fabrication parts for the transportation and assembly markets. |