Coating compositions
AssigneeExxon Chemical Patents Inc.
InventorsRobert D. M. Best, Jean F. Brument
Life of this patent
Estimating the term…
Abstract
A blend of from 10 to 90 parts by weight of a basic calcium sulphonate free of calcium carbonate in the calcite form and from 90 to 10 parts by weight of a terpolymer of 80 to 99 wt.% of an olefin containing from 2 to 4 carbon atoms, 1 to 30 wt.% of an unsaturated ester which is a vinyl ester of a carboxylic acid or an ester of acrylic or methacrylic acid and 1 to 20 wt.% of an unsaturated carboxylic acid is particularly useful for car undercoatings for corrosion and chip resistance which may be applied as high solids coatings.
Claims16
A blend, having a solids content of greater than 60 weight percent, and consisting essentially of from 10 to 90 parts by weight of basic, colloidal disperse, non-thixotropic calcium sulphonate composition comprising calcium carbonate having substantially no infra-red absorbance at 884 cm.sup.-1 and from 90 to 10 parts by weight of a polymer, which has the following properties:
- i a low degree of crystallinity of less than 50%,
- ii a number average molecular weight in the range of from about 3,000 to about 1 million, and
- iii a high solubility in predominantly aliphatic hydrocarbon solvents.
Metal coated with a blend having a solids content greater than 60 weight percent and from 10 to 90 parts by weight of a basic, colloidal dispersed, non-thixotropic calcium sulphonate substantially free from infra-red absorbance at 884 cm.sup.-1 and from 90 to 10 parts by weight of a polymer, which has the following properties:
- i a low degree of crystallinity of less than 50%
- ii a molecular weight in the range of from about 3,000 to about 1 million, and
- iii a high solubility in predominantly aliphatic hydrocarbon solvents.
A composition comprising from 10 to 90 parts by weight of a polymer having:
- a degree of crystallinity of less than 50 percent, 3,000 to about 1 million, and
- a high solubility in predominantly hydrocarbon solvents;
- and
- from 10 to 90 parts by weight of colloidal disperse, non-thixotropic overbased calcium sulphonate containing more than 60 weight percent solids and comprising:
- calcium sulphonate, and
- an amount of calcium carbonate in excess of the amount required to neutralize the sulphonate anions present,
- with substantially all of the calcium carbonate in the composition being free of calcium carbonate having an infra red absorbance at 884cm.sup.-1.
A method of protecting metal comprising the steps of:
- forming a solution, having a solids content of greater than 60 weight percent, of a solvent and at least 60 weight percent of a composition comprising
- from 10 to 90 parts by weight of a polymer having a degree of crystallinity of less than 50 percent,
- a number average molecular weight of from about 3,000 to about 1 million, and
- a high solubility in predominantly hydrocarbon solvents;
- and
- from 10 to 90 parts by weight of a colloidal disperse, nonthixotropic overbased calcium sulphonate comprising
- calcium sulphonate, and
- an amount of calcium carbonate in excess of the amount required to neutralize the sulphonate anions present,
- with substantially all of the calcium carbonate in the composition being free of calcium carbonate having an infra red absorbance at 884 cm.sup.-1 ;
- and
- spraying the solution on to a metal surface.
A method of protecting metal consisting essentially of the steps of:
- forming a solution, having a solids content of greater than 60 weight percent, of a solvent and at least 60 weight percent of a composition consisting essentially of:
- from 10 to 90 parts by weight of a polymer having a degree of crystallinity of less than 50 percent,
- a number average molecular weight of from about 3,000 to about 1 million, and
- a high solubility in predominantly hydrocarbon solvents;
- and
- from 10 to 90 parts by weight of a colloidal disperse, non-thixotropic overbased calcium sulphonate comprising
- calcium sulphonate, and
- an amount of calcium carbonate in excess of the amount required to neutralize the sulphonate anions present,
- with substantially all of the calcium carbonate in the composition being free of calcium carbonate having an infra red absorbance at 884 cm.sup.-1 ;
- and
- spraying the solution on to a metal surface.
Dependencies are inferred from the claim text.