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US 11,897,977 B2Granted
Photolabile barbiturate compounds
Assignee3M Innovative Properties Company
InventorsWilliam H. Moser, Erik M. Townsend, Zachary J. Thompson, Mary M. Caruso Dailey, Michael A. Kropp
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Abstract
The present disclosure provides a redox initiator system for initiating polymerization comprising an oxidizing agent, a photolabile reducing agent derived from a barbiturate, and a transition metal complex that participates in a redox cycle. On exposure to actinic radiation, such as UV, the photolabile compound photolyzes, releasing the reducing agent and initiating the redox-initiated polymerization.
Claims17
A polymerizable composition comprising a polymerizable component, and a redox initiation system comprising:
- a) a transition metal complex that participates in a redox cycle;
- b) an oxidizing agent;
- c) a photolabile reducing agent of the formula:
- wherein
- R1, R2 and R3 are each independently H, C1-18 hydrocarbyl;
- and
- a) RPhoto is a photolabile group;
- and optionally a quaternary ammonium halide.
5 more elements
Dependencies are inferred from the claim text.