US4453982A — Stabilized metal pigments and method of producing…

Claim 1

Independent Claim 160 words

Process for stabilizing metal pigments against chemical influences for use in paint systems comprising blending a metal pigment with the reaction product of an amine-aldehyde condensation product etherified with low molecular weight alcohols and an acidic phosphoric acid derivative which has the formula P (O) R.sub.x (OH).sub.y or a polyphosphoric acid derivative of the general formula [P (O) R.sub.x (OH).sub.y-z O.sub.0.5 z ] n, wherein R is a radical linked to the phosphoric or polyphosphoric acid radical through a C--P- or C--O--P-linkage and which contains a group reactive with said amine-aldehyde condensation product; x being a number less than 3 and x+y equaling 3, z being the number of P--O-links stemming from a P-atom and being less than y, and n being the degree of polymerization, at from about 10 to 80° C. until hydrogen formation caused by the reaction ceases; the weight ratio between said reaction product and metal pigment expressed by the value ##EQU2## being at least 1.

Claim 2

Dependent Claim 160 words

Process for stabilizing metal pigments against chemical influences for use in paint systems comprising blending a metal pigment with the reaction product of an amine-aldehyde condensation product etherified with low molecular weight alcohols and an acidic phosphoric acid derivative which has the formula P (O) R.sub.x (OH).sub.y or a polyphosphoric acid derivative of the general formula [P (O) R.sub.x (OH).sub.y-z O.sub.0.5 z ] n, wherein R is a radical linked to the phosphoric or polyphosphoric acid radical through a C--P- or C--O--P-linkage and which contains a group reactive with said amine-aldehyde condensation product; x being a number less than 3 and x+y equaling 3, z being the number of P--O-links stemming from a P-atom and being less than y, and n being the degree of polymerization, at from about 10 to 80° C. until hydrogen formation caused by the reaction ceases; the weight ratio between said reaction product and metal pigment expressed by the value ##EQU2## being at least 1.

Claim 3

Dependent Claim 29 words

The process of claim 1 wherein said blending of metal pigment and said reaction product is carried out prior to addition of the metal pigment to a paint system.

Claim 4

Dependent Claim 24 words

The process of claim 1 wherein said blending of said metal pigment to said reaction product is carried out in situ in paint system.

Claim 5

Dependent Claim 19 words

The process of claim 1 wherein said blending occurs at a temperature at from about 15 to 40° C.

Claim 6

Dependent Claim 22 words

The process of claim 1 wherein said group reactive with said amine-aldehyde condensation product is formed from alkyl, cycloalkyl, or aryl radicals.

Claim 7

Dependent Claim 15 words

The process of claim 5 wherein said reactive group includes. ##STR2## or a heterocyclic radical.

Claim 8

Dependent Claim 13 words

The process of claim 1 wherein K has a value of above 50.

Claim 9

Dependent Claim 26 words

The process of claim 1 wherein the reaction between said reaction product and the metal pigment is carried out in the presence of a water-miscible solvent.

Claim 10

Dependent Claim 13 words

The process of claim 8 wherein said water-miscible solvent is a glycol ether.

Claim 11

Dependent Claim 35 words

The process of claim 1 wherein the metal pigment and said reaction product are blended for 30 minutes to 1 hour with high stirring and then subsequently stored at room temperature until gas formation ceases.

Claim 12

Dependent Claim 29 words

The process of claim 1 wherein said metal pigment is in the form of a metal powder based on aluminum, zinc, magnesium, copper, steel, bronze, brass, and mixtures thereof.

Claim 13

Dependent Claim 18 words

The process of claim 11 wherein said metal powders are pretreated with a solvent or a wetting agent.

Claim 14

Dependent Claim 16 words

The process of claim 11 wherein said metal powder is in the form of a paste.

Claim 15

Dependent Claim 130 words

Metal pigments reacted with the reaction product of an amine-aldehyde condensation product etherified with low molecular weight alcohols and an acidic phosphoric acid derivative of the general formula P (O) R.sub.x (OH).sub.y or a polyphosphoric acid derivative of the general formula [P (O) R.sub.x (OH).sub.y-z O.sub.0.5 z ] n, wherein R is a radical linked to the phosphoric or polyphosphoric acid radical through a C--P- or C--O--P-linkage and which contains a group reactive with said amine-aldehyde condensation product; x being a number less than 3 and x+y equaling 3, z being the number of P--O-links stemming from a P-atom and being less than y, and n being the degree of polymerization; the weight ratio between said reaction product and metal pigment expressed by the value ##EQU3## being at least 1.

Claim 16

Dependent Claim 130 words

Metal pigments reacted with the reaction product of an amine-aldehyde condensation product etherified with low molecular weight alcohols and an acidic phosphoric acid derivative of the general formula P (O) R.sub.x (OH).sub.y or a polyphosphoric acid derivative of the general formula [P (O) R.sub.x (OH).sub.y-z O.sub.0.5 z ] n, wherein R is a radical linked to the phosphoric or polyphosphoric acid radical through a C--P- or C--O--P-linkage and which contains a group reactive with said amine-aldehyde condensation product; x being a number less than 3 and x+y equaling 3, z being the number of P--O-links stemming from a P-atom and being less than y, and n being the degree of polymerization; the weight ratio between said reaction product and metal pigment expressed by the value ##EQU3## being at least 1.

Claim 17

Dependent Claim 23 words

The metal pigments of claim 14 wherein said group reactive with said amine-aldehyde condensation product is formed from alkyl, cycloalkyl, or aryl radicals.

Claim 18

Dependent Claim 15 words

The metal pigments of claim 15 wherein said reactive group includes. ##STR3## or heterocyclic radicals.

Claim 19

Dependent Claim 10 words

A paint formulation containing the metal pigments of claim 14.

Claim 20

Dependent Claim 10 words

The paint of claim 17 wherein the vehicle includes water.

Claim 21

Dependent Claim 12 words

The paint of claim 17 wherein the vehicle includes an organic solvent.

Claim 22

Dependent Claim 26 words

The paint of claim 17 wherein said reaction of metal pigment and said reaction product is carried out prior to its addition to a paint system.

Claim 23

Dependent Claim 27 words

The paint of claim 17 wherein said reaction of metal pigment and said reaction product is carried out in situ during the formation of the paint system.

Claim 24

Dependent Claim 36 words

The paint of claim 17 wherein the quantity of resin in said paint system is present at a level of from 80 to 100% as a result of the amine-aldehyde condensation product of said reaction product.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1987-06-12	1987-12-12	1988-06-12	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1991-06-12	1991-12-12	1992-06-12	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1995-06-12	1995-12-12	1996-06-12	$7700.00	Window Closed / Lapsed

Stabilized metal pigments and method of producing same

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