Stabilizer composition of phosphite and lignin

Details Stabilizer composition of phosphite and lignin Stabilizer composition of phosphite and lignin

1973-06-13

1976-04-06

Padgett, Benjamin R.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

252398, 260 175, 260814, C09K 1532, C08L 9700, C09K 1534

Patent

active

039488012

ABSTRACT:
Stabilizing compositions comprising at least one triaryl phosphite, trialkyl phosphite or mixtures thereof and at least one modified lignin, the weight ratio of the phosphite to modified lignin is from 97/3 to 10/90. The modified lignins are produced by heat treating lignins in the presence of a nucleophile, such that a portion of the original guaiacyl structures are converted to catechols via a demethylation reaction. Elastomers may be protected against atmospheric degradation by the addition thereto of 0.01 to 5.0 parts by weight, preferably 0.25 to 2.0 parts, per 100 parts of elastomer of the stabilizing composition.

REFERENCES:
patent: 2976273 (1961-03-01), Ball
patent: 3201437 (1965-08-01), Friedman
patent: 3325427 (1967-06-01), Doughty
patent: 3352700 (1967-11-01), Biskup
patent: 3493637 (1970-02-01), Coupland
patent: 3629141 (1971-12-01), Lecher
patent: 3629199 (1971-12-01), Petersen
patent: 3789043 (1974-01-01), Falkehag
"Encyclopedia of Chemical Technology" 2nd. Ed. 1967, Vol. 12, pp. 362 and 379.
Hine, "Physical Organic Chemistry", McGraw Hill 2nd. Ed. 1962, p. 161.

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