Paint formulations containing hectorite compositions
Novel paint formulations are described containing hectorite and phosphonate additives. The paint formulations are useful for a wide variety of paints and coatings particularly those are applied by spraying and are particularly useful for metallic coating formulations applied to automobiles.
1 ) (canceled)
2 ) A formulation according to claim 23 , wherein the hectorite is selected from the group consisting of calcium hectorite and sodium hectorite.
3 ) The formulation according to claim 23 , wherein the hectorite is sodium hectorite.
4 ) (canceled)
5 ) The paint formulation according to claim 23 , wherein the phosphonate additive is selected from the group consisting of:
(a) Phosphonic acid compounds that contain at least two moieties having the structure:
and salts thereof,
(b) Phosphinic acid compounds that contain at least two moieties having the structure:
and salts thereof, and
(c) Compounds which form phosphoric or phosphinic acids, or salts thereof.
6 ) The paint formulation according to claim 23 , further comprising an alkali swellable-rheological additive.
7 ) The formulation according to claim 23 wherein the hectorite is sodium hectorite and the phosphonate compound is selected from the group consisting of:
a) Diphosphonic acids of formula R 1 R 2 C(PO(OH) 2 ) 2 ,
b) Diphosphonic acids of formula R 1 —CR 2 (PO(OH) 2 )—R 3 —CR 2 PO(OH) 2 —R 5 ,
c) Phosphonic acids with general formula R 1 R 4 C═C(PO(OH) 2 ) 2 , and
d) The lithium, sodium, potassium, calcium and magnesium salts of the compounds described under a), b) and c),
where R 1 can be selected from the group comprising H, a linear or branched alkyl, alkene, hydroxyalkyl, aminoalkyl, hydroxyalkene, aminoalkene with 1 to 22 carbon atoms or an aryl, hydroxyaryl, aminoaryl with 6 to 22 carbon atoms; R 2 can be selected from the group comprising R 1 and OH; R 3 is an alkyl with 0 to 22 carbon atoms; and both R 4 and R 5 can be selected from the group R 1 .
8 ) The formulation according to claim 23 , wherein the phosphonate additive is selected from the group consisting of 1-hydroxyethylene-1,1-diphosphonic acid sodium salt or an ester thereof.
9 ) The formulation according to claim 8 , wherein the hectorite is sodium hectorite.
10 ) The paint formulation of claim 23 wherein the hectorite clay comprises about 0.1 to 10 wt. %; and the one or more phosphonate additives comprise about 0.5 to 6 wt % based on the weight of the hectorite clay.
11 ) The paint formulation according to claim 10 , wherein the hectorite is selected from the group consisting of calcium hectorite and sodium hectorite and the formulation contains a rheological additive.
12 ) The paint formulation according to claim 10 , where the phosphonate additive is selected from the group consisting of a 1-hydroxyethylene-1,1-diphosphonic acid, a salt thereof and an ester thereof.
13 ) A method of making an automotive metallic paint formulation comprising:
a) treating beneficiated or unbeneficiated natural hectorite with one or more phosphonate additives; and
b) adding the treated mixture to a paint formulation which comprises metallic flakes.
14 ) The method of claim 13 comprising:
a) treating a mixture of hectorite and water with the one or more phosphonate additives to form a clay slurry; and
b) drying the resultant treated mixture; and
c) adding the dried treated mixture to the paint formulation which comprises the metal flakes.
15 ) The method according to claim 14 , wherein the natural hectorite is sodium hectorite and the hectorite clay and phosphonate additive are added as a mixture.
16 ) The method of claim 13 comprising:
b) adding the treated mixture to the paint formulation as a pregel in water.
17 ) The method according to claim 16 , wherein the phosphonate additive is 1-hydroxyethylene-1,1-diphosphonic acid tetra sodium salt.
18 ) (canceled)
19 ) (canceled)
20 ) (canceled)
21 ) (canceled)
22 ) The metallic paint formulation of claim 23 further comprising an alkali swellable rheological additive.
23 ) An automotive metallic paint formulation comprising:
a) at least 1% of beneficiated or unbeneficiated natural hectorite clay;
b) from about 0.5 to 15 wt. %, based on the weight of the clay, of one or more phosphonate additives;
c) metallic flakes selected from the group consisting of aluminum, copper and mixtures thereof; and
d) water.
24 ) A metallic paint formulation prepared by the process of claim 16 .
25 ) The method of claim 13 wherein the clay, phosphonate and water are added as a post-correction additive.
26 ) The metallic paint formulation of claim 23 further comprising an alkali swellable chemical.
27 ) A metallic paint formulation prepared by the process of claim 13 .
28 ) The metallic paint formulation of claim 23 in the form of a sprayable metallic paint.
29 ) The sprayable metallic paint formulation of claim 28 prepared by a process wherein the clay, phosphonate and water were added as a pregel.
30 ) The sprayable metallic paint formulation of claim 28 prepared by a process wherein the clay, phosphonate and water were added as a post-correction additive.
31 ) The sprayable metallic paint formulation of claim 28 further comprising an alkali swellable chemical.
32 ) The sprayable metallic formulation of claim 28 prepared by a process wherein the clay and the phosphonate additive were added to the formulation as a mixture.
33 ) The paint formulation of claim 5 wherein the phosphonate additive is selected from lithium, sodium, potassium, calcium and magnesium salts of the compounds described under (a), (b) and (c).