Moisture curable silicone urea hot melt reinforced by organic polymers
View Patent ↗The present invention provides curable hot melt compositions including reactive polymers, which are reinforced by organic polymers to impart higher tensile strength and elongation to the compositions upon cure. In particular, the present invention provides curable hot melt compositions including a silicone urea based polymer and a reinforcement polymer. In some embodiments, the compositions cure upon exposure to moisture and/or radiation. The compositions may be used, for example, as sealants or adhesives.
1. A curable hot melt composition comprising:
a) at least one of
i) a reactive polymer of Formula C(I):
wherein:
R 1 in each occurrence may be the same or different and is a member selected from the group consisting of H and a C 1 to C 10 hydrocarbon radical;
R 2 in each occurrence may be the same or different and is a C 1 to C 10 hydrocarbon radical;
R 3 in each occurrence may be the same or different and is a C 1 to C 10 hydrocarbon radical;
R 4 in each occurrence may be the same or different and is a C 1 to C 10 hydrocarbon radical;
J in each occurrence may be the same or different and is a C 1 to C 10 hydrocarbon diradical;
X in each occurrence can be the same or different and is a member selected from the group consisting of O, S, and NR 10 ,
wherein R 10 in each occurrence may be the same or different and is a member selected from the group consisting of H and a C 1 to C 10 hydrocarbon radical;
Y in each occurrence may be the same or different and is a C 1 to C 20 hydrocarbon diradical;
W in each occurrence may be the same or different and is C 2 to C 10 radical containing at least one of: a carbon to carbon double bond, a carbonyl group, or an epoxide group;
Q in each occurrence may be the same or different and is a C 1 to C 10 hydrocarbon diradical;
n in each occurrence may be the same or different and is 1 to about 1,200;
m is 1 to about 100; and
a in each occurrence may be the same or different and is 0 or 1;
ii) a reactive polymer of Formula C(III):
wherein:
J in each occurrence may be the same or different and is a C 1 to C 10 hydrocarbon diradical;
Y in each occurrence may be the same or different and is a C 1 to C 20 hydrocarbon diradical;
W in each occurrence may be the same or different and is a C 2 to C 10 radical containing at least one of: a carbon to carbon double bond, a carbonyl group, or an epoxide group;
Q in each occurrence may be the same or different and is a C 1 to C 10 hydrocarbon diradical;
R 1 in each occurrence may be the same or different and is a member selected from the group consisting of H and a C 1 to C 10 hydrocarbon radical;
R 2 in each occurrence may be the same or different and is a C 1 to C 10 hydrocarbon radical;
R 3 in each occurrence may be the same or different and is a C 1 to C 10 hydrocarbon radical;
R 4 in each occurrence may be the same or different and is a member selected from the group consisting of H and a C 1 to C 10 hydrocarbon radical;
n in each occurrence may be the same or different and is 1 to about 1,200;
m is 1 to about 100; and
a in each occurrence may be the same or different and is 0 or 1;
iii) the reaction product of:
a. a composition of Formula C(IV):
wherein:
Y in each occurrence may be the same or different and is a C 1 to C 20 hydrocarbon diradical;
Q in each occurrence may be the same or different and is a C 1 to C 10 hydrocarbon diradical;
R 1 in each occurrence may be the same or different and is a member selected from the group consisting of H and a C 1 to C 10 hydrocarbon radical;
R 2 in each occurrence may be the same or different and is a C 1 to C 10 hydrocarbon radical;
R 3 in each occurrence may be the same or different and is C 1 to C 10 hydrocarbon radical;
R 4 in each occurrence may be the same or different and is a C 1 to C 10 hydrocarbon radical;
n in each occurrence may be the same or different and is 1 to about 1,200;
m is 1 to about 100; and
a in each occurrence may be the same or different and is 0 or 1;
b. a compound having the structure:
W—J—X—H
wherein:
J in each occurrence may be the same or different and is a C 1 to C 10 hydrocarbon diradical;
X in each occurrence may be the same or different and is a member selected from the group consisting of O, S, and NR 10 , wherein R 10 in each occurrence may be the same or different and is a member selected from the group consisting of H and a C 1 to C 10 hydrocarbon radical;
W in each occurrence may be the same or different and is C 2 to C 10 radical containing at least one of: a double bond, a carbonyl group, or an epoxide group;
iv) the reaction product of:
a. a composition of Formula C(V):
wherein:
J in each occurrence may be the same or different and is a C 1 to C 10 hydrocarbon diradical;
W is a C 2 to C 10 radical containing at least one of: a carbon to carbon double bond, a carbonyl group, or an epoxide group;
Q in each occurrence may be the same or different and is a C 1 to C 10 hydrocarbon diradical;
R 1 in each occurrence may be the same or different and is a member selected from the group consisting of H and a C 1 to C 10 hydrocarbon radical;
R 2 in each occurrence may be the same or different and is a C 1 to C 10 hydrocarbon radical;
R 3 in each occurrence may be the same or different and is a C 1 to C 10 hydrocarbon radical;
R 4 in each occurrence may be the same or different and is a C 1 to C 10 hydrocarbon radical; and
n in each occurrence may be the same or different and is 1 to about 1,200; and
b. a compound having the structure:
OCN—Y—NCO
wherein Y is a C 1 to C 20 hydrocarbon diradical; and
b) a reinforcement polymer.
2. The composition of claim 1 , wherein said reinforcement polymer comprises at least one monomer selected from the group consisting of (meth)acrylate ester monomers, alkylene monomers, isocyanate monomers, ethylene/acrylic polymers, polydimethylsiloxane/urea polymers, styrene-butadien-styrene polymers, styrene-ethylene/propylene-styrene polymers, polychloroprene polymers and combinations thereof.
3. The composition of claim 1 , wherein said diisocyanate is selected from the group consisting of isophorone diisocyanate, hexamethylene diisocyanate, and 1,3-bis(cyanatomethyl)cyclohexane.