Cyclic phosphites of sugar alcohols and polymers stabilized therewith
AssigneeHoechst Aktiengesellschaft
InventorsNorbert Mayer, Gerhard Pfahler, Franz Scheidl
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Abstract
The invention is related to novel phosphites of sugar alcohols, their use as stabilizers for organic polymers, furthermore to stabilizer compositions containing these novel phosphites as well as the organic polymers stabilized therewith. The novel phosphites have a good stabilizing effect, especially in combination with known stabilizers, and they are substantially stable against hydrolytical influence. Their volatility and tendency to exudation are very weak.
Claims6
A compound of the formula ##STR8## in which m = 2 or 3, n = 0, 1 or 2 and 2m + n is equal to or lower than 6,
- Y = --O--, --S-- or --NR'-- with R' = H or C.sub.1 to C.sub.20 -alkyl,
- R = an unbranched alkyl group, having 12 to 20 carbon atoms.
Stabilizer combination for homopolymers and copolymers of halogen-free C.sub.2 to C.sub.4 -.alpha.-olefins, consisting of 0.05 to 5.0 parts by weight of at least one compound as claimed in claim 1, 0.05 to 3.0 parts by weight of a known phenolic stabilizer, 0.05 to 0.2 parts by weight of a calcium salt of a fatty acid or a wax acid, 0 to 3.0 parts by weight of a known sulfidic stabilizer and 0 to 3.0 parts by weight of a known UV stabilizer.
Stabilizer combination for chlorinated polyolefins and chlorine-containing vinyl homo- and copolymers, consisting of 0.05 to 5.0 parts by weight of at least one compound as claimed in claim 1, 0.1 to 5.0 parts by weight of a metal soap known as stabilizer, 0.1 to 5.0 parts by weight of a known epoxide stabilizer and 0 to 1.0 part by weight of a polyhydric alcohol.
Dependencies are inferred from the claim text.