| 摘要 |
Low-shrinkage positioning includes, in addition to the resin-forming composition, a filler comprised of fibrous and spherical elements, usually o f glass, present in a defined ratio and amount. The resin formulation may desirably comprise epoxy resin and a copolymerizable monomer having amide, acrylamide, or hydroxyl functionality, and may advantageously be devoid of a ny cationic catalyst ingredient.
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