Two stage methods for processing adhesives and related compositions
First Claim
Patent Images
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.
1 Assignment
0 Petitions
Accused Products
Abstract
Methods for forming melt processable, actinic radiation polymerizable and crosslinkable adhesives are described. In certain versions, the adhesives or pre-adhesive compositions include two initiators and are polymerized and/or crosslinked by exposure to actinic radiation such as UV light or electron beam radiation. Also described are pre-adhesive compositions including polymerizable monomers, articles including the adhesives, and various methods and systems related to the adhesives and their application. In addition, various apparatuses are described for polymerizing or crosslinking the compositions.
198 Citations
15 Claims
-
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, and wherein at least one of the first and second initiators is an activatable photoinitiator moiety covalently bound to the pre-adhesive polymer backbone. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
-
-
15. 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, and wherein the second initiator is an activatable photoinitiator moiety covalently bound to the pre-adhesive polymer backbone.
-
Specification