| 摘要 |
<p>A method of making a one-part, spreadable, adhesive composition comprises (i) forming the reaction product at a room temperature below 130 DEG C of an epoxy resin, a functional group-terminated butadiene/acrylonitrile copolymer elastomer, a chain extender and a catalyst for the reactions between the epoxy and functional groups, (ii) cooling the reaction product, and then (iii) combining the reaction product with a hardener, providing that in step (ii) the product is cooled to a temperature at which there will be substantially no reaction when combined with the hardener. The resulting adhesive composition has a reasonable storage life as it is substantially noncurable at room temperature, a temperature of at least 130 DEG C usually being required to convert it to an infusible state. In addition the adhesive composition is usually curable to a product having a high impact modulus i.e. a non-brittle product.</p> |
