Phosphites of sugar alcohols and polymers stabilized therewith
AssigneeHoechst Aktiengesellschaft
InventorsHarald Haberlein, Norbert Mayer, Gerhard Pfahler
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Abstract
The present invention relates to novel phosphites of sugar alcohols, their use as stabilizers for organic polymers, to stabilizer compositions containing these novel phosphites and to the organic polymers being stabilized therewith. The novel phoshites have a good stabilizing effect, especially in combination with known stabilizers, and they are substantially stable to hydrolysis.
Claims6
A compound of the formula I ##STR8## in which m is 1 or 2 or 3,
- n is zero or 1 or 2,
- p is zero or 1 or 2, with the proviso that (2m + 2n + p) is equal to or greater than 4 and equal to or smaller than 6,
- R.sup.1 represents a linear alkyl radical having from 10 to 30 carbon atoms,
- X represents --O--, --S-- or --NR'-- with R' being hydrogen or C.sub.1 to C.sub.20 alkyl, and
- R.sup.2 represents a linear alkyl radical having from 12 to 30 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 2.0 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.