Two stage methods for processing adhesives and related compositions

  • US 11,091,675 B2
  • Filed: 08/05/2019
  • Issued: 08/17/2021
  • Est. Priority Date: 02/19/2016
  • Status: Active Grant
First Claim
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1. A method of forming an adhesive, the method comprising:

  • providing a composition comprising at least one monomer, a first actinic radiation initiator, and a second actinic radiation initiator, wherein the second initiator is substantially non-photoactive at activation wavelength(s) of the first initiator;

    at least partially polymerizing the composition by exposing the composition to radiation comprising wavelengths corresponding to the activation wavelength(s) of the first initiator;

    at least partially crosslinking the composition to thereby form the adhesive by exposing the composition to radiation comprising wavelengths corresponding to the activation wavelength(s) of the second initiator;

    wherein at least one of the first and the second initiators is a polymerizable monomer containing a photoinitiator moiety,wherein upon activation of the first initiator the at least one monomer polymerizes to form a pre-adhesive, andwherein at least one of the first and second initiators is an activatable photoinitiator moiety covalently bound to the pre-adhesive polymer backbone.

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