Thermoset volatile monomer molding compositions
AssigneeE. I. Du Pont de Nemours and Company
InventorsRolf Thomas Weberg, Lawrence J. Simmons, Richard Reid Gleason
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Abstract
A molding composition including reactive high-volatility monomeric groups, such as acrylics, at least one primary thermal initiator and at least one secondary thermal initiator is described. Molding processs using molding compositions including reactive high-volatility monomeric groups are also described.
Claims29
A composition comprising:
- (a) from about 10 to about 25% by weight of a liquid polymerizable material including at least one volatile monomer reactive material;
- (b) at least one viscosity builder;
- (c) at least one primary thermal initiator having a primary thermal initiator ten-hour half-life temperature;
- and
- (d) at least one secondary thermal initiator having a secondary thermal initiator ten-hour half-life temperature at least about 5° C. greater than the primary thermal initiator ten-hour half-life temperature;
- wherein at least about 0.05% by weight is one or more crosslinking agents.
A molded article made from a molding composition comprising (a) from about 10 to about 25% by weight of a liquid polymerizable material including at least one volatile monomer reactive material, (b) at least one primary thermal initiator having a primary thermal initiator ten-hour half-life temperature, (c) at least one secondary thermal initiator having a secondary thermal initiator ten-hour half-life temperature of at least about 5° C. greater than the primary thermal initiator ten-hour half-life temperature, wherein at least about 0.05% by weight is one or more crosslinking agents.
Dependencies are inferred from the claim text.