Two part polyurea-urethane adhesive with elevated high temperature storage modulus
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United States of America Patent
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Oct 28, 2014
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May 15, 2012
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May 16, 2011
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Abstract
Two-part polyurea-urethane adhesive compositions comprising a Part A prepolymer component having an isocyanate component comprising polymeric isocyanate and an oligomer content greater than 15 weight percent, polyol having a molecular weight of about 5,000 to about 12,000 and about 20 weight percent to about 44 percent weight percent filler; and a Part B curative component comprising polyol having molecular weight of about 5,000 to about 12,000, aromatic amine, about 20 weight percent to about 44 percent weight percent filler and catalyst wherein the adhesive has an 85° C. storage modulus greater than about 20 MPa. The two-part polyurea-urethane adhesive composition can be applied to bond various substrates including composite materials and metal, including making parts for the transportation and assembly markets.
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