| 摘要 |
This invention relates to a low-viscosity two-component filled polyurethane adhesive comprising (a) a low-viscosity isocyanate component in a quantity sufficient to provide an isocyanate index of about 100 to about 150 comprising an organic polyisocyanate in which up to 10 equivalent percent of the isocyanate groups have been modified by reaction with one or more isocyanate-reactive compounds; and (b) a low-viscosity phase-stable curative component comprising (i) 5 to 50 equivalent percent of a polyether polyol and/or a polyether terminated by aromatic amino groups having an equivalent weight greater than 500, (ii) 30 to 95 equivalent percent of 2-methyl-1,3-propanediol, and (iii) 0 to 35 equivalent percent of a chain extender and/or crosslinker other than 2-methyl-1,3-propanediol, with the proviso that the equivalent ratio of component (b)(iii) to component (b)(ii) is no more than about 0.6, wherein at least one of components (a) or (b) contains 10 to 40 percent by weight, based on filled polyurethane adhesive, of at least one filler.
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