| 摘要 |
Low shrink and low profile reinforced plastic systems are prepared from vinyl ester resins by incorporating therein an additive having the formula: <IMAGE> WHEREIN R1 and R2 are hydrogen, methyl or ethyl with the provision that, if either R1 or R2 is hydrogen, the other is methyl or ethyl, n and m are whole numbers such that said additive is soluble in said resin when uncured and insoluble in said resin when cured; and B is the residue of a hydroxyl containing initiating compound. Typical of such compounds are water, ethylene glycol, glycerine and phenol. The value of p is equal to or less than the number of hydroxyls in the initiating compound.
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