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US 5,310,890 AGranted
Carbohydrate substituted dibenzoi(d,g)(1,3,2)dioxaphosphocin stabilizers
AssigneeCiba-Geigy Corporation
InventorsStephen D. Pastor, Joseph E. Babiarz
Life of this patent
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Abstract
Carbohydrate substituted dibenzo[d,g][1,3,2]dioxaphosphocin compounds of formula I ##STR1## where A is a carbohydrate residue are effective stabilizers for polymers processed at elevated temperatures and subject to thermal or oxidative degradation.
Claims13
A compound of formula I ##STR7## wherein n is 1 to 6,
- X is methylene, alkylidene of 2 to 8 carbon atoms or --S--,
- T.sub.1, T.sub.2, T.sub.3 and T.sub.4 are independently alkyl of 1 to 12 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, aryl of 6 to 10 carbon atoms or phenylalkyl of 7 to 15 carbon atoms, and
- A is a carbohydrate residue which is a radical, diminished by a hydroxyl or thiol group or an amine hydrogen atom, of a protected monohydroxy-functional, monothiol-functional or monoamine-functional sugar, thio-sugar or amino-sugar or derivatives thereof belonging to the group of sugar alcohols, esters of sugar acid, aldo-sugar acid or keto-sugar acid, amino-sugar, sugar mercaptal or deoxy-sugar;
- and
- with the proviso that when X is --S--, A is not 1,2:5,6-di-O-isopropylidene-D-glucofuranosyl.
2 more elements
Dependencies are inferred from the claim text.