Claims
- 1. The method of forming clusters of noble metal silver-precipitating nuclei which comprises the steps of reducing a noble metal salt or complex to form a colloidal suspension of said nuclei and subsequently inducing instability into the thus-formed colloid whereby said clusters are formed.
- 2. The method as disposed in claim 1 wherein said instability is produced by raising the pH of said colloid from about 2 to at least about 2.6.
- 3. The method as defined in claim 1 wherein said instability in said colloid is produced by boiling said colloid.
- 4. The method as defined in claim 1 which includes the step of floccing the thus-formed clusters of silver precipitating nuclei and redispersing said floc in a polymeric binder material.
- 5. The method as defined in claim 1 wherein polymeric binder material is added to the colloid subsequent to the formation of the clusters.
- 6. The method as defined in claim 1 wherein said nuclei is about 1 to 15 nm and said clusters are about 10 times the particle size of said nuclei.
- 7. The method of claim 1 wherein said noble metal is palladium.
- 8. The method of claim 1 wherein said reduction is carried out with stannous chloride.
CROSS REFERENCES TO RELATED APPLICATIONS
This application is a continuation-in-part of copending application Ser. No. 649,201, filed Jan. 14, 1976.
US Referenced Citations (2)
Continuation in Parts (1)
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Number |
Date |
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Parent |
649201 |
Jan 1976 |
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