Gramophone record composition
AssigneeTalres Development (N.A.) N.V.
InventorsKenneth James, Frederick J. Smith
Life of this patent
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Abstract
Gramophone records are prepared from a vinyl polymer composition containing a fatty acid soap of an alkaline earth metal or zinc, sugar or polyol fatty acid esters and fatty acid mixed glycerides and is free of heavy metal ions.
Claims15
A stabilised gramophone record composition comprising a vinyl polymer containing by weight from 0.3 to 1.5% of a fatty acid soap of an alkaline earth metal or zinc;
- 0.3 to 1.85% of sugar or polyol fatty acid esters;
- and
- 0.15 to 1.10% of fatty acid mixed glycerides;
- and being free of heavy metal ions.
An antistatic stabilising powder composition for incorporation into a gramophone record plastics composition, comprising 6 to 30 parts by weight of a fatty acid soap of an alkaline earth metal or zinc;
- 6 to 37 parts by weight of sugar or polyol fatty acid esters and 3 to 22 parts by weight of fatty acid mixed glycerides, together with an anti-caking agent.
A gramophone record formed of a plastics composition containing by weight from 0.3 to 1.5% of a fatty acid soap of an alkaline earth metal or zinc;
- 0.3 to 1.85% of sugar or polyol fatty acid esters;
- and
- 0.15 to 1.10% of fatty acid mixed glycerides;
- and being free of heavy metal ions.
Dependencies are inferred from the claim text.