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Title: Method of reducing static electricity in plastic compositions and antistatic compositions
Claims: We claim: 1. In the method of reducing the electrostatic charge acquired by a plastic composition comprising the step of incorporating an antistatically-effective amount of an antistatic agent in said plastic composition, the improvement consisting essentially of using an antistatically-effective amount of a mixed oxide of phosphorus and one or more metals selected from the group consisting of silicon, aluminum, titanium and iron, said mixed oxide having been prepared by flame hydrolysis and having a BET surface area of from 15 to 400 m.sup.2 /gm, as said antistatic agent. 2. The process of claim 1 wherein said mixed oxide has a phosphorus content of from 0.1 to 30% by weight. 3. The process of claim 2 wherein said mixed oxide has a phosphorus content of from 3 to 15% by weight. 4. The process of claim 1 wherein said antistatically-effective amount is from 0.05 to 80% by weight. 5. The process of claim 1 wherein said plastic composition is pulverulent and said antistatically-effective amount is from 0.05 to 2% by weight. 6. The process of claim 5 wherein said antistatically-effective amount is from 0.1 to 0.3% by weight. 7. The process of claim 1 wherein said plastic composition is shaped and said antistatically-effective amount is from 1 to 5% by weight. 8. The process of claim 1 wherein said plastic composition is shaped and said mixed oxide is employed both as a filler and as a antistatic agent in an amount of from 5 to 80% by weight. 9. The process of claim 1 wherein said mixed oxide is a mixed oxide of phosphorus and silicon. 10. The process of claim 1 wherein said mixed oxide is a mixed oxide of phosphorus and titanium. 11. A plastic composition comprising a plastic material subject to acquiring an electrostatic charge and intimately mixed therewith an antistatically-effective amount of a mixed oxide of phosphorus and one or more metals selected from the group consisting of silicon, aluminum, titanium and iron, said mixed oxide having been prepared by flame hydrolysis and having a BET surface area of from 15 to 400 m.sup.2 /gm. 12. The composition of claim 11 wherein said mixed oxide has a phosphorus content of from 0.1 to 30% by weight. 13. The composition of claim 12 wherein said mixed oxide has a phosphorus content of from 3 to 15% by weight. 14. The composition of claim 11 wherein said antistatically-effective amount is from 0.05 to 80% by weight. 15. The composition of claim 11 wherein said plastic material is pulverulent and said antistatically-effective amount is from 0.05 to 2% by weight. 16. The composition of claim 15 wherein said antistatically-effective amount is from 0.1 to 0.3% by weight. 17. The composition of claim 11 wherein said plastic material is shaped and said antistatically-effective amount is from 1 to 5% by weight. 18. The composition of claim 1 wherein said plastic material is shaped and said mixed oxide is employed both as a filler and as an antistatic agent in an amount of from 5 to 80% by weight. 19. The composition of claim 11 wherein said mixed oxide is a mixed oxide of phosphorus and silicon. 20. The composition of claim 11 wherein said mixed oxide is a mixed oxide of phosphorus and titanium. 21. The process of claim 1 wherein said plastic composition is a vinyl chloride polymer selected from the group consisting of polyvinyl chloride and vinyl chloride copolymers. 22. The process of claim 1 wherein said plastic composition is a polymer selected from the group consisting of vinyl chloride polymers, polyvinyl esters, polyolefin polymers, polyfluorohydrocarbons, aromatic vinyl polymers, polyamides, polyurethanes, polycarbonates, formaldehyde polycondensates, polyester resins, epoxide resins, silicon resins, rubber and mixtures thereof. 23. The composition of claim 11 wherein said plastic composition is a vinyl chloride polymer selected from the group consisting of polyvinyl chloride and vinyl chloride copolymers. 24. The process of claim 11 wherein said plastic composition is a polymer selected from the group consisting of vinyl chloride polymers, polyvinyl esters, polyolefin polymers, polyfluorohydrocarbons, aromatic vinyl polymers, polyamides, polyurethanes, polycarbonates, formaldehyde polycondensates, polyester resins, epoxide resins, silicon resins, rubber and mixtures thereof. Other info: Inventors: Kratel, Gunter (Durach-Bechen, DT) Bauer, Johann (Burghausen, DT) Pichler, Engelbert (Burghausen, DT) Kalmuk, Hans-Peter (Kempten, DT) Application Number: 610535 Filing Date: 1975-09-05 Publication_date: 1978-04-18 Assignee: Wacker Chemie GmbH (Munich, DT) Primary Class(es): 524/414 260/DIG16, 524/912, 524/925, 528/408, 528/412, 528/416 Other Classes: US Patent Ref:
Other Refs:
Primary Examiner: Derrington, James H. Assistant Examiner: Attorney: Hammond & Littell |
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