Back to results
US 5,308,549 AGranted
Stabilizers for thermo plastic materials
AssigneeHoffmann-La Roche Inc.
InventorsStuart F. Laermer, Vincent J. Rizzo
Life of this patent
Estimating the term…
Abstract
Stabilizing mixtures for a plastic material are disclosed. The mixture is comprised of (a) about one part by weight of a tocopherol compound; and (b) from about 1.4 to about 5.0 parts by weight of a secondary antioxidant.
Claims6
A mixture for stabilizing a plastic material comprising:
- a) from about 10 to about 50 percent by weight alphatocopherol;
- b) from about 16 to about 20 percent by weight glycerin;
- c) from about 16 to about 50 percent by weight PEG-300;
- and
- d) from about 42 to about 50 percent by weight glyceryl monocaprylate-caprate.
2 more elements
A mixture for stabilizing a plastic material comprising:
- a) about 50 percent by weight alpha-tocopherol;
- and
- b) about 50 percent by weight glyceryl monocaprylate-caprate.
A mixture for stabilizing a plastic material comprising:
- a) about 50 percent by weight alpha-tocopherol;
- and
- b) about 50 percent by weight PEG-300.
Dependencies are inferred from the claim text.