Nonaqueous liquid crystal compositions
AssigneeColgate-Palmolive Company
InventorsGuy Broze, Louis Oldenhove de Guertechin
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Abstract
The present invention relates to a liquid crystal composition which comprises approximately by weight 7 to 70% a nonionic surface active agent. 0 to 30% of an aliphatic hydrocarbon having about 6 to 16 carbon atoms, and 10 to 90% of an essentially nonaqueous polar solvent having a Hansen hydrogen bonding solubility parameter at 25.degree. C. of at least 12M Pa.sup.1/2.
Claims20
A nonaqeuous liquid crystal composition having an apparent viscosity at 10.sup.-2 sec.sup.-1 of about 1.5 to about 300 Pa and an apparent viscosity at 10.sup.2 sec.sup.-1 of about 0.05 to about 1.5 Pa which comprises approximately by weight:
- (a) 7 to 70% of a nonionic surface active agent;
- (b) 5 to 30% of an aliphatic hydrocarbon having about 6 to about 16 carbon atoms;
- and
- (c) 10 to 90% of an essentially nonaqueous polar solvent having a hydrogen bonding cohesion parameter at 25.degree. C. of at least about 12M Pa.sup.1/2 ;
- and
- (d) 0 to 50% of an essentially nonaqueous polar cosolvent having a Hansen hydrogen bonding cohesion parameter at 25.degree. C. of at least about 20M PA.sup.1/2.
Dependencies are inferred from the claim text.