Patent ID: 6294229
Filing Date: 2001-09-25
Classification: C09K,G02B,G02F

Abstract:
A film for optical elements comprising a liquid crystalline composition film having a thickness of 0.1 to 20 microns, said film heat treated at a temperature at the range of 50.degree. C. to 300.degree. C. for a period of time ranging between 10 seconds and 120 minutes, whereby liquid crystal orientation is formed, said film formed from a liquid crystalline composition, said composition comprising(a) a liquid crystalline polymer which exhibits an optically positive uniaxial property; and(b) 0.1 to 20 wt. %, based on the weight of said component (a), of a polycyclic compound having the general formula R.sup.1 --(B.sup.1 --A.sup.1)--(B.sup.2 --A.sup.2)-- . . . --(B.sup.n --A.sup.n)--B.sup.n+1 --R.sup.2, where R.sup.1 and R.sup.2 are independently a hydrocarbon group having 1 to 20 carbon atoms; A.sup.1 to A.sup.n are each a ring structure bonded to different constituent atoms to two adjacent B.sup.n s; B.sup.1 to B.sup.n+1 are each a single bond or an organic group of 1 to 4 atoms interposed between any of adjacent radicals R.sup.1, R.sup.2 and A.sup.n ; and n is an integer of 2 to 8, said polycyclic compound having a molecular weight of from 410 to 1,000.