Anti-yellowing composition
US4221687A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 3, 1978 |
| Grant date | Sep 9, 1980 |
| Priority date | — |
| Expiry date | Jul 3, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K3/10
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An anti-yellowing additive is provided for environmentally acceptable stabilized vinyl chloride polymer compositions from which arsenic, cadmium, lead, mercury, and thallium are substantially excluded, comprising at least one basic inorganic compound of lithium, sodium, potassium, magnesium, calcium, strontium, barium, zinc, titanium, aluminum, zirconium, or tin, and a 1,3-diketone compound represented by the formula ##STR1## in which R is a hydrocarbon group having 1 to 18 carbon atoms, R' is a hydrogen atom, an acyl group ##STR2## or a hydrocarbon group having 1 to 18 carbon atoms, R' is a hydrogen atom or a hydrocarbon group having 1 to 18 carbon atoms, M is a hydrogen or one of the metals lithium, sodium, potassium, magnesium, calcium, strontium, barium, zinc, aluminum, and antimony, and n is the valence of the metal from 1 to 3.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.