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Stable thiol-ene compositions

  • US 5,358,976 A
  • Filed: 12/23/1992
  • Issued: 10/25/1994
  • Est. Priority Date: 11/13/1989
  • Status: Expired due to Fees
First Claim
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1. A composition polymerizable to a crosslinked polythioether comprisingi) an '"'"'ene compound having a plurality of groups of the formula ##STR6## where Q is CR12, O,S, NR1 or S2, each R1 is independently H or alkyl, and m is 0-10;

  • ii) a compound having at least two pendant or terminally positioned --SH functional groups per average molecule, the ratio of reactive carbon-carbon unsaturated groups in the '"'"'ene compound (i) to --SH functional groups on the thiol compound (ii) being in the range from about 0.75/1 to about 1.5/1;

    iii) a stabilizing amount of a non-acidic nitroso compound selected from the group consisting of N-nitroso amines, N-nitroso amino acids, N-nitroso amides, N-nitroso hydroxylamine salts, nitrosobenzene, 4-nitroso-N,N-dimethylaniline, 1-nitrosopyrrolidine and 2-methyl-2-nitrosopropane; and

    iv) a phenyl ketone photoinitiator.

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