Intercalates and exfoliates formed with hydroxyl-functional; polyhydroxyl-functional; and aromatic compounds; composites materials containing same and methods of modifying rheology therewith
First Claim
1. A method of exfoliating a phyllosilicate comprising;
- contacting the phyllosilicate, having a moisture content of at least about 4% by weight, with an intercalant monomer and a carrier for said intercalant monomer, said intercalant monomer having a functionality selected from the group consisting of a hydroxyl;
a polyhydroxyl; and
mixtures thereof, to form an intercalating composition, comprising the phyllosilicate, the intercalant monomer, and a carrier for the intercalant monomer, wherein the intercalating composition comprises at least about 2% by weight of said intercalant monomer, based on the dry weight of the phyllosilicate, to achieve intercalation of said monomer between said adjacent phyllosilicate platelets in an amount sufficient to space said adjacent phyllosilicate platelets a distance of at least about 5 Å
, and to bond the intercalant monomer to a platelet surface through a bonding mechanism selected from the group consisting of ionic compexing;
electrostatic complexing;
chelation;
hydrogen bonding;
dipole/dipole;
van der Waals forces; and
any combination thereof without an onium ion or silane coupling agent; and
separating the platelets of the intercalated phyllosilicate.
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Accused Products
Abstract
Intercalates formed by contacting a layered material, e.g., a phyllosilicate, with an intercalant monomer having a hydroxyl and/or an aromatic ring functionality to sorb or intercalate the intercalant monomer between adjacent platelets of the layered material. Sufficient intercalant monomer is sorbed between adjacent platelets to expand the adjacent platelets to a spacing of at least about 5 Å (as measured after water removal to a maximum of 5% by weight water), up to about 100 Å and preferably in the range of about 10-45 Å, so that the intercalate easily can be exfoliated into individual platelets. The intercalated complex can be combined with an organic liquid into a viscous carrier material, for delivery of the carrier material, or for delivery of an active compound; or the intercalated complex can be combined with a matrix polymer to form a strong, filled polymer matrix. Alternatively, the intercalated complex can be exfoliated prior to or after combination with the organic liquid or the matrix polymer.
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Citations
16 Claims
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1. A method of exfoliating a phyllosilicate comprising;
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contacting the phyllosilicate, having a moisture content of at least about 4% by weight, with an intercalant monomer and a carrier for said intercalant monomer, said intercalant monomer having a functionality selected from the group consisting of a hydroxyl;
a polyhydroxyl; and
mixtures thereof, to form an intercalating composition, comprising the phyllosilicate, the intercalant monomer, and a carrier for the intercalant monomer, wherein the intercalating composition comprises at least about 2% by weight of said intercalant monomer, based on the dry weight of the phyllosilicate, to achieve intercalation of said monomer between said adjacent phyllosilicate platelets in an amount sufficient to space said adjacent phyllosilicate platelets a distance of at least about 5 Å
, and to bond the intercalant monomer to a platelet surface through a bonding mechanism selected from the group consisting of ionic compexing;
electrostatic complexing;
chelation;
hydrogen bonding;
dipole/dipole;
van der Waals forces; and
any combination thereof without an onium ion or silane coupling agent; andseparating the platelets of the intercalated phyllosilicate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification