Lithium, Aluminum, magnesium/zinc hydroxide salt
US5840792A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 8, 1996 |
| Grant date | Nov 24, 1998 |
| Priority date | — |
| Expiry date | Nov 8, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2002/72
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
There is incorporated as a stabilizer into a halogen-containing resin a complex hydroxide salt represented by the formula EQU Al.sub.2 (Li.sub.(1-x).M.sub.x)(OH).sub.6 !.sub.n (A.sup.-n).sub.1+x.mH.sub.2 O wherein A is an inorganic or organic anion, M is Mg and/or Zn, n is a valence number of anion A, m is 0 or positive number, and x satisfies the expression of 0.01.ltoreq.x<1. This complex hydroxide salt causes almost no occurrence of initial coloration when incorporated in halogen-containing resins because a part of lithium ion to enter a vacant site of aluminum hydroxide octahedron layer of the gibbsite structure in the lithium aluminum complex hydroxide salt is substituted for the metal ions of Mg and/or Zn. By substitution of a part of lithium ion for the divalent metal ions, the amount of charge-supplying anion is increased and the thermally stabilizing ability is superior to that of the lithium aluminum complex hydroxide salts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.