Chemistry of carbon compounds – Miscellaneous organic carbon compounds
Patent
1976-03-09
1977-08-09
Marquis, Melvyn I.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
106271, 106272, 260 285D, 260 296PM, 260 4575H, 427222, 428407, C08L 9100
Patent
active
040409961
ABSTRACT:
Processing additives are incorporated in polyvinyl chloride resins to form molding compositions by preparing an aqueous emulsion wherein the additives such as lubricants and stabilizers are in the disperse phase and then mixing an aliquot portion of the emulsion with a polyvinyl chloride resin powder in a high shear mixer to incorporate the additives in the resin in the proper proportions. By using an aqueous emulsion of the additives, the need for separately weighing each additive to be added to each batch of polyvinyl chloride is avoided and uniform dispersion of the additives in the resin achieved. The heat generated during the mixing process evaporates most of the water of the emulsion and the relatively small amount of retained water improves the anti-static properties of the molding composition.
REFERENCES:
patent: 3067162 (1962-12-01), Went et al.
patent: 3567669 (1971-03-01), Georgiana et al.
patent: 3862066 (1975-01-01), Reiter et al.
American Hoechst Corporation
Marquis Melvyn I.
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