Processing tape for optical articles

1. A tape comprising:

a thermally stable tape backing with a first major surface and a second major surface;

and a low tack adhesive layer at least partially coated on the first major surface of the

tape backing, wherein the low tack adhesive layer comprises a crosslinked, polyester-containing (meth)acrylate-based polymer that is essentially free of volatile components, is unchanged after heat aging of 150° C. for 1 hour under a pressure of 4.31 kiloPascals, and is able to removably adhere to an anti-reflective, nanostructured surface coating of an optical construction, wherein the polyester-containing (meth) acrylate-based polymer is prepared from a reaction mixture comprising: at least one multifunctional polyester-containing (meth) acrylate; at least one polyester-containing (meth) acrylate oligomer; and an initiator.

2. The tape of claim 1 , wherein the thermally stable tape backing comprises at least one polyester material.

3. The tape of claim 1 , wherein the polyester-containing (meth)acrylate-based polymer is free of tackifying resins, plasticizing resins, and unreacted free radically polymerizable compounds.

4. The tape of claim 1 , wherein the reaction mixture comprises:

75-85 parts by weight based on 100 total parts by weight of reactive components of the at least one multifunctional, polyester-containing (meth)acrylate; and

15-25 parts by weight based on 100 total parts by weight of reactive components of the at least one polyester-containing (meth)acrylate oligomer.

5. The tape of claim 1 , wherein the initiator comprises a photoinitiator.

6. The tape of claim 1 , wherein the polyester-containing (meth)acrylate-based polymer has a calculated Tg in the range of −30 to −40° C.

7. The tape of claim 1 , wherein the thermally stable tape backing has a thickness of from 51 micrometers to 102 micrometers (2-4 mils).

8. The tape of claim 1 , wherein the low tack adhesive layer has a thickness of from 13 micrometers to 25 micrometers (0.5-1.0 mils).

9. The tape of claim 1 , further comprising a primer layer disposed between the first major surface of the thermally stable tape backing and the low tack adhesive layer.

10. An optical laminate comprising:

an optical construction comprising:

a heat resistant film comprising a first major surface and a second major surface, with an anti-reflective, nanostructured surface coating on the second major surface; and

a tape removably adhered to the anti-reflective, nanostructured surface coating on the second major surface of the optical construction, the tape comprising:

a thermally stable tape backing with a first major surface and a second major surface; and

a low tack adhesive layer at least partially coated on the first major surface of the tape backing, wherein the low tack adhesive layer comprises a crosslinked, polyester-containing (meth)acrylate-based polymer that is essentially free of volatile components, is unchanged after heat aging of 150° C. for 1 hour under a pressure of 4.31 kiloPascals, wherein the polyester-containing (meth) acrylate-based polymer is prepared from a reaction mixture comprising: at least one multifunctional polyester-containing (meth) acrylate; at least one polyester-containing (meth) acrylate oligomer; and an initiator.

11. The optical laminate of claim 10 , wherein the heat resistant film comprises a heat resistant polyester film.

12. The optical laminate of claim 10 , wherein the heat resistant film further comprises at least one additional layer or coating.

13. The optical laminate of claim 12 , wherein the at least one additional layer or coating on the heat resistant film comprises a primer layer, a hardcoat layer, or combinations thereof.

14. A method of preparing an optical article comprising:

providing an optical construction comprising:

a heat resistant film comprising a first major surface and a second major surface, with an anti-reflective, nanostructured surface coating on the second major surface;

providing a tape, the tape comprising:

a thermally stable tape backing with a first major surface and a second major surface; and

a low tack adhesive layer at least partially coated on the first major surface of the tape backing, wherein the adhesive layer comprises a crosslinked, polyester-containing (meth)acrylate-based polymer that is essentially free of volatile components, is unchanged after heat aging of 150° C. for 1 hour under a pressure of 4.31 kiloPascals, wherein the polyester-containing (meth) acrylate-based polymer is prepared from a reaction mixture comprising: at least one multifunctional polyester-containing (meth) acrylate; at least one polyester-containing (meth) acrylate oligomer; and an initiator, and is able to removably adhere to the anti-reflective, nanostructured surface of the optical construction;

adhering the low tack adhesive layer of the tape to the anti-reflective, nanostructured surface coating on the second major surface of the optical construction to form an optical laminate;

subjecting the optical laminate to a temperature of 150° C. for 1 hour under a pressure of 4.31 kiloPascals; and

cleanly removing the tape from the anti-reflective, nanostructured surface coating on the second major surface of the optical construction.

15. The method of claim 14 , wherein the optical construction further comprises additional layers.

16. The method of claim 14 , wherein the optical laminate is formed by heat lamination.

17. The method of claim 14 , wherein the polyester-containing (meth)acrylate-based polymer has a calculated Tg in the range of −30 to −40° C.

18. The method of claim 14 , further comprising a primer layer disposed between the first major surface of the thermally stable tape backing and the low tack adhesive layer.