Isosorbide derivatives

Details Isosorbide derivatives Isosorbide derivatives

2007-12-25

2007-12-25

Wu, Shean C (Department: 1756)

Stock material or miscellaneous articles

Liquid crystal optical display having layer of specified...

C252S299700, C252S299010, C549S464000

Reexamination Certificate

active

10490723

ABSTRACT:
The invention pertains to an isosorbide derivative having at least one polymerizable group, characterized in that the isosorbide derivative further comprises at least one photo-convertible group for adjusting the helical twisting power of the isosorbide derivative. According to a preferred embodiment the isosorbide has the formulawhereinA stands for a bond or a p-phenylene group;B and B′ are independently O—(CH2)oO—CO—CR′═CH2, o being 2-12 and R′ being H or CH3;P stands for a CH2or a C═O group;Q and Q′ are independently selected from H, C1-C3 alkyl, C1-C3 alkoxy, halogen, and CN;n is an integer from 1 to 3; andm is an integer from 0 to 2.

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