Thermosetting inorganic clay nanodispersions and their use
View Patent ↗This invention relates to thermosetting inorganic clay nanodispersions comprising an inorganic clay treated in situ with an intercalation agent and a non-aqueous, chemically reactive, organic intercalation facilitating agent, wherein the amount of intercalation facilitating agent is sufficient to facilitate intercalation and to disperse said inorganic clay. The thermosetting inorganic clay nanodispersions comprise an inorganic clay dispersed in an intercalating agent and an intercalation facilitating agent. Thermosetting inorganic clay nanodispersions are used to prepare thermosetting nanocomposite articles.
1. A process for preparing a liquid thermosetting inorganic clay nanodispersion in the absence of water comprising:
mixing in situ an untreated inorganic clay containing inorganic cations, a quaternary ammonium salt, and a non-aqueous, chemically reactive organic intercalation facilitating agent selected from the group consisting of chemically reactive thermosetting monomers and/or polymers, wherein the amount of intercalation facilitating agent is sufficient to facilitate intercalation and to disperse said inorganic clay.
2. The process of claim 1 wherein the monomer and/or polymer used to facilitate intercalation and the intercalation agent are mixed together before adding them to the inorganic clay.
3. The process of claim 2 wherein the inorganic clay is montmorillonite clay.
4. The process of claim 3 wherein the intercalation facilitating agent is compatible with the inorganic clay and quaternary ammonium salt used to prepare the inorganic clay nanodispersion.
5. The process of claim 4 wherein the intercalation facilitating agent is selected from the group consisting of styrene monomer, acrylic monomer, epoxy resins, and polyols.
6. The process of claim 5 wherein styrene is used as the agent that facilitates intercalation, an unsaturated polyester is used as the curative, and a peroxide is used as the catalyst at elevated temperatures.
7. The process of claim 6 wherein an epoxy resin is used as the resin that facilitates intercalation and a polyamide is used as the curative with a tertiary amine as a catalyst.
8. The process of claim 7 wherein a polyol is used as the resin that facilitates intercalation, an organic polyisocyanate is used as the as the curative, and a tertiary amine is used as the catalyst.
9. The process of claim 8 wherein an epoxy resin is used as the resin that facilitates intercalation, a polyfunctional amine is used as the curative.
10. The process of claim 2 wherein the process is carried out at a temperature of 25° C. to 80° C.
11. The process of claim 3 wherein from 20 to 100 percent of the cations of the cationic inorganic clay are replaced with the cations of the cationic surfactant.
12. A thermosetting inorganic clay nanodispersion prepared by the process of claim 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , or 11 .
13. The thermosetting inorganic clay nanodispersion of claim 12 wherein the Brookfield viscosity of the nanodispersion is from 200 to 100,000 cps at 25° C.
14. The thermosetting inorganic nanodispersion of claim 13 which further comprises a filler.
15. The thermosetting inorganic nanodispersion of claim 14 which further comprises a curative.
16. A process for preparing a thermosetting nanocomposite article comprising
(a) introducing the composition of claim 15 into a pattern to form a shape;
(b) curing the shape prepared by (a).
17. A thermosetting nanocomposite article prepared in accordance with claim 16 .