Low-viscosity photocurable adhesive compositions

A photocurable (meth) acrylate composition comprising:

• tetrahydrofurfuryl acrylate;
• urethane acrylate resin;
• isobornyl acrylate;
• N,N-dimethylacrylamide;
• and
• a photoinitiator component, wherein the tetrahydrofurfuryl acrylate is present in an amount from about 5% to about 30% by weight based on the total weight of the composition.

A photocurable (meth)acrylate composition comprising:

• tetrahydrofurfuryl acrylate;
• urethane acrylate resin;
• isobornyl acrylate;
• N,N-dimethylacrylamide;
• and
• a photoinitiator component, wherein the isobornyl acrylate is present in an amount from about 15% to about 32% by weight based on the total weight of the composition.

A photocurable (meth)acrylate composition comprising:

• tetrahydrofurfuryl acrylate;
• urethane acrylate resin;
• isobornyl acrylate;
• N,N-dimethylacrylamide;
• and
• a photoinitiator component, wherein the N,N-dimethylacrylamide is present in an amount from about 18% to about 30% by weight based on the total weight of the composition.

A photocurable (meth)acrylate composition comprising:

• tetrahydrofurfuryl acrylate;
• urethane acrylate resin;
• isobornyl acrylate;
• N,N-dimethylacrylamide;
• and
• a photoinitiator component, wherein the composition further comprises an epoxide-bearing organosilane, wherein the epoxide-bearing organosilane is present in an amount from about 0.2% to about 2% by weight based on the total weight of the composition.

A photocurable (meth)acrylate composition comprising:

• tetrahydrofurfuryl acrylate;
• urethane acrylate resin;
• isobornyl acrylate;
• N,N-dimethylacrylamide;
• and
• a photoinitiator component, wherein the composition further comprises a fluorescent agent, wherein the fluorescent agent is present from about 0.005% to about 0.5% by weight based on the total weight of the composition.

A photocurable (meth)acrylate composition comprising:

• (i) tetrahydrofurfuryl acrylate in an amount 9% to about 15% by weight based on the total weight of the composition;
• (ii) urethane acrylate resin from about 34% to about 49% by weight based on the total weight of the composition;
• (iii) isobornyl acrylate from about 23% to about 28% by weight based on the total weight of the composition;
• (iv) N,N-dimethylacrylamide from about 24% to about 24.5% by weight based on the total weight of the composition;
• and
• (v) a photoinitiator component;
• and wherein the composition optionally further comprises at least one of:
• (vi) an epoxide-bearing organosilane, in an amount from about 0.9% to about 1.1% by weight based on the total weight of the composition;
• or
• (vii) a fluorescent agent in an amount from about 0.08% to about 0.12% by weight based on the total weight of the composition.