P(o) Group Containing Ring Is Part Of A Condensed Or Bridged Carbocyclic Ring System (9/6574a4) Patents (Class 987/41)
  • Carbohydrate substituted dibenzo[d,f][1,3,2]dioxaphosphepin stabilizers
    Patent number: 5414028
    Abstract: Carbohydrate substituted dibenzo[d,f][1,3,2]dioxaphosphepin 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.
    Type: Grant
    Filed: February 17, 1994
    Date of Patent: May 9, 1995
    Assignee: Ciba-Geigy Corporation
    Inventors: Stephen D. Pastor, Joseph E. Babiarz
  • Carbohydrate substituted dibenzo[D,G][1,3,2]dioxaphosphocin stabilizers
    Patent number: 5356962
    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.
    Type: Grant
    Filed: February 17, 1994
    Date of Patent: October 18, 1994
    Assignee: Ciba-Geigy Corporation
    Inventors: Stephen D. Pastor, Joseph E. Babiarz