Low-melting elemental metal or fusible alloy encapsulated polymerization initiator for delayed initiation
View Patent ↗An encapsulated composition for polymerization includes an initiator composition for initiating a polymerization reaction, and a capsule prepared from an elemental metal or fusible alloy having a melting temperature from about 20° C. to about 200° C. A fluid for polymerization includes the encapsulated composition and a monomer. When the capsule melts or breaks open, the initiator is released.
1. An article of manufacture comprising an encapsulated polymerization initiator composition for initiating a polymerization reaction of a monomer to form a polymer; said encapsulated polymerization initiator composition comprising:
a polymerization initiator; and
a metal capsule encapsulating the polymerization initiator composition, said metal selected from an elemental metal or a fusible alloy, said metal capsule having a melting temperature from about 20° C. to about 200° C.
2. The article of manufacture according to claim 1 , wherein the encapsulated polymerization initiator composition further comprises a dye.
3. The article of manufacture according to claim 1 , wherein a pressure inside the capsule is less than atmospheric pressure.
4. The article of manufacture according to claim 1 , wherein a pressure inside the capsule is greater than atmospheric pressure.
5. The article of manufacture according to claim 1 , wherein a pressure inside the capsule is atmospheric pressure.
6. The article of manufacture according to claim 1 , wherein the initiator is selected from an azo initiator, a peroxide initiator, or a redox initiator.
7. The article of manufacture according to claim 1 , wherein said elemental metal is Ga or In.
8. The article of manufacture according to claim 1 , wherein said fusible alloy includes Bi.
9. The article of manufacture according to claim 1 , wherein said fusible alloy includes Sn.
10. The article of manufacture according to claim 1 , wherein said fusible alloy includes Pb.
11. The article of manufacture according to claim 1 , wherein said fusible alloy includes Cd.
12. The article of manufacture according to claim 1 , wherein said fusible alloy includes Zn.
13. The article of manufacture according to claim 1 , wherein said fusible alloy includes In.
14. The article of manufacture according to claim 1 , wherein said fusible alloy includes Tl.
15. The article of manufacture according to claim 1 , wherein said fusible alloy includes at least two metals selected from Bi, Pb, In, Cd, Tl, Sn, and Zn.