LYOTROPIC LIQUID CRYSTALS AND VESICLES
First Claim
1. A method of making a silicone based liquid crystal or vesicle comprising reacting:
- (A) an ≡
Si—
H containing polysiloxane (i) of the formula R3SiO(R′
2SiO)a(R″
HSiO)bSiR3, (ii) of the formula HR2SiO(R′
2SiO)cSiR2H, or (iii) the formula HR2SiO(R′
2SiO)a(R″
HSiO)bSiR2H, where in the formulas, R, R′
, and R″
, are alkyl groups with 1-6 carbon atoms;
a is 0-250;
b is 1-50; and
c is 0-250; and
(B) a mono-alkenyl polyether of the formula CH2═
CH(CH2)xO(CH2CH2O)y[CH2CH(CH3)O]zR, in which R represents hydrogen or an alkyl group containing 1-10 carbon atoms;
x is 1-6;
y is zero or has a value of 4-100;
z is zero or has a value of 4-100;
provided y or z are both not zero;
in the presence of a platinum catalyst until an ≡
Si—
H containing polysiloxane with polyether groups is formed;
and then reacting;
(C) the ≡
Si—
H containing polysiloxane with polyether groups;
(D) an unsaturated hydrocarbon selected from the group consisting of α
,ω
-dienes having the formula CH2═
CH(CH2)xCH═
CH2 where x is 1-20;
α
,ω
-diynes of the formula CH≡
C(CH2)xC≡
CH where x is 1-20; and
α
,ω
-ene-ynes of the formula CH2═
CH(CH2)xC═
CH where x is 1-20; and
(E) water;
in the presence of a platinum catalyst until a silicone based liquid crystal or vesicle is formed.
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Accused Products
Abstract
Silicone based liquid crystal and vesicles are prepared by first reacting (A) an ≡Si—H containing polysiloxane, (B) a mono-alkenyl polyether, in the presence of a platinum catalyst until an ≡Si—H containing polysiloxane with polyether groups (C) is formed. The ≡Si—H containing polysiloxane with polyether groups (C) is then reacted with (D) an unsaturated hydrocarbon such as an α,ω-dienes, and (E) water, in the presence of a platinum catalyst until the silicone based liquid crystal or vesicle is formed. The silicone based liquid crystal or vesicle can also be heated until a hard liquid crystal gel or vesicle paste are formed.
3 Citations
9 Claims
-
1. A method of making a silicone based liquid crystal or vesicle comprising reacting:
-
(A) an ≡
Si—
H containing polysiloxane (i) of the formula R3SiO(R′
2SiO)a(R″
HSiO)bSiR3, (ii) of the formula HR2SiO(R′
2SiO)cSiR2H, or (iii) the formula HR2SiO(R′
2SiO)a(R″
HSiO)bSiR2H, where in the formulas, R, R′
, and R″
, are alkyl groups with 1-6 carbon atoms;
a is 0-250;
b is 1-50; and
c is 0-250; and(B) a mono-alkenyl polyether of the formula CH2═
CH(CH2)xO(CH2CH2O)y[CH2CH(CH3)O]zR, in which R represents hydrogen or an alkyl group containing 1-10 carbon atoms;
x is 1-6;
y is zero or has a value of 4-100;
z is zero or has a value of 4-100;
provided y or z are both not zero;
in the presence of a platinum catalyst until an ≡
Si—
H containing polysiloxane with polyether groups is formed;and then reacting; (C) the ≡
Si—
H containing polysiloxane with polyether groups;(D) an unsaturated hydrocarbon selected from the group consisting of α
,ω
-dienes having the formula CH2═
CH(CH2)xCH═
CH2 where x is 1-20;
α
,ω
-diynes of the formula CH≡
C(CH2)xC≡
CH where x is 1-20; and
α
,ω
-ene-ynes of the formula CH2═
CH(CH2)xC═
CH where x is 1-20; and(E) water; in the presence of a platinum catalyst until a silicone based liquid crystal or vesicle is formed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
Specification