Claims
- 1. A rheologically stable aqueous dispersion of metal-modified novolak resin comprising up to about 58% by weight of particles of said metal-modified novolak resin having an average particle size of below about 10 microns, at least about 1.5% by weight based on the weight of said resin particles of an anionic polymeric dispersing agent and at least about 0.2% by weight based on the weight of said resin particles of an organo-phosphorus compound, said organo-phosphorus compound containing two or more phosphonic acid or alkali metal phosphonate groups per molecule.
- 2. The aqueous dispersion of claim 1 in which said particles of said metal-modified comprise 40 to 58% by weight of the dispersion.
- 3. The aqueous dispersion of claim 1 in which the organo-phosphorus compound is present in the amount of 0.2 to 1.5% solids based on the weight of said resin and the anionic dispersing agent is present in the amount of 1.5 to 3% solids based on the weight of the metal-modified novolak resin.
- 4. The aqueous dispersion of claim 1 in which the organo-phosphorus compound is pentasodium aminotrimethylphosphonate.
- 5. The aqueous dispersion of claim 1 which additionally contains sodium hexametaphosphate.
- 6. The aqueous dispersion of claim 1 which additionally contains clay particles.
- 7. The aqueous dispersion of claim 1 in which the organo-phosphorus compound is selected from the group consisting of polyphosphonic acids and aminopolyphosphonic acids and the alkali metal salts of the polyphosphonic acid and aminopolyphosphonic acid.
- 8. The aqueous dispersion of claim 1 in which the metal-modified novolak resin is a zinc-modified para-substituted phenolformaldehyde novolak resin.
- 9. The aqueous dispersion of claim 1 in which the anionic polymeric dispersing agent is a sodium salt of a copolymer of equal parts of maleic anhydride and diisobutylene.
CROSS REFERENCE TO RELATED APPLICATION
This application is a division of co-pending application U.S. Ser. No. 575,055, filed May 5, 1975, now U.S. Pat. No. 4,034,128.
US Referenced Citations (4)
Number |
Name |
Date |
Kind |
3455721 |
Phillips et al. |
Jul 1969 |
|
3516845 |
Brockett |
Jun 1970 |
|
3732120 |
Brockett et al. |
May 1973 |
|
3970769 |
Kato et al. |
Jul 1976 |
|
Divisions (1)
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Number |
Date |
Country |
Parent |
575055 |
May 1975 |
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