Shaped plastic articles having replicated microstructure...

B - Operations – Transporting – 29 – D

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18/103, 18/99, 2

B29D 11/00 (2006.01) B29D 17/00 (2006.01) C08G 18/67 (2006.01) G02B 1/04 (2006.01) G02B 5/124 (2006.01)

Patent

CA 1133209

SHAPED PLASTIC ARTICLES HAVING REPLICATED MICROSTRUCTURE SURFACES Abstract of the Disclosure An article comprising a shaped, plastic layer or body comprising crosslinked polymer with hard and soft segments or moieties and having a microstructure-bearing surface is prepared by a process comprising filling a mold master, bearing or encoded with the microstructure to be replicated, with a fluid, castable, one-part, pre- ferably solvent-free, radiation addition-polymerizable, crosslinkable, synthetic, organic oligomeric composition (or precursors thereof) having "hard" segments and "soft" segments, exposing the resulting cast composition to radia- tion, preferably actinic radiation such as ultraviolet radiation, and thereby forming said article, e.g., a retro- reflective cube-corner sheeting, Fresnel lens or video disc.

327835

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