| 摘要 |
<p>A foamable and simultaneously curable polyester composition is disclosed, said composition consisting essentially of, all parts being by weight:
<UnorderedLists id="ula01" listStyle="none"><ListItem>(a) 100 parts liquid unsaturated polyester resin;</ListItem><ListItem>(b) 0.5 to 10 parts monosubstituted sulfonyl hydrazide having the formula RS0<Sub>2</Sub>NHNH<Sub>2</Sub>, wherein R is C<Sub>1</Sub>-C<Sub>12</Sub> alkyl, C<Sub>6</Sub>-C<Sub>6</Sub> cycloalkyl, C<Sub>2</Sub>-C<Sub>10</Sub> aralkyl, phenyl, naphthyl, or phenyl substituted with halogen, C<Sub>1</Sub>-C<Sub>12</Sub> alkyl or C<Sub>1</Sub>-C<Sub>12</Sub> alkoxy;</ListItem><ListItem>(c) 0.1 to 5.0 parts of a promoter, said promoter consisting essentially of a mixture of organic heavy metal salt and organic alkali metal salt, wherein the heavy metal/ alkali metal molar ratio is from 1011 to 1/10;</ListItem><ListItem>(d) 0 to 2 parts surfactant;</ListItem><ListItem>(e) 0 to 250 parts of filler; and</ListItem><ListItem>(f) 0.3 to 5 parts of a cross-linking initiating compound selected from organic peroxides and organic hydroperoxide.</ListItem></UnorderedLists></p><p>Methods for preparing a foamed and cured polyester resin, making use of the above composition, are also described.</p> |
