Production of copper(II) hydroxide phosphate with a light natura

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...

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524417, 524567, 528490, 423305, 423307, 423309, 423604, 424140, C08K 310

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045672202

ABSTRACT:
A process for producing a copper(II) hydroxide phosphate having the Cu.sub.3 (PO.sub.4).sub.2.Cu(OH).sub.2 composition and having a light natural color and an average grain size less than 10 microns. Basic copper carbonate of a bulk density less than 800 grams per liter is treated in an aqueous dispersion with phosphoric acid at temperatures less than 70.degree. C. and the reaction mixture is then mechanically agitated further within the same temperature range.
The copper phosphate so obtained is applicable as a smoke-reducing additive in polyvinyl or molding materials containing the same.

REFERENCES:
patent: Re28472 (1975-07-01), Aronberg
patent: 4294808 (1981-10-01), Wasel-Nielen et al.
patent: 4346065 (1982-08-01), Maurer et al.
patent: 4390654 (1983-06-01), Schuler et al.
patent: 4482541 (1984-11-01), Telfer et al.

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