Liquid styrenated phenolic compositions and processes for forming same
View Patent ↗Disclosed herein are highly stable styrenated phenolic compositions that are liquids at room temperature, and polymer articles and lubricant compositions containing such styrenated phenolic compositions. Also disclosed are processes for forming such styrenated phenolic compositions, which processes afford distyrenated phenolics assaying at 70% minimum by total GC area, comprising reacting styrene with one or more phenolics, e.g., at least one of phenol, p-cresol and/or o-cresol, in the presence of an acid catalyst, preferably a sulfonic acid catalyst, at elevated temperature, wherein the resulting product mixture comprises one or more monostyrenated phenolics, one or more distyrenated phenolics, and one or more tristyrenated phenolics.
1. A stabilized composition comprising a thermoplastic, thermoelastomer, rubber or lubricant and from about 0.01 to about 10% by weight based on the total weight of the stabilized composition of a liquid styrenated phenolic composition, said phenolic composition comprising:
(a) at least one 2,6-distyrenated p-cresol in an amount of from about 80 to about 95 percent by total Gas Chromatography area;
(b) at least one monostyrenated-p-cresol in an amount greater than 1 percent by total Gas Chromatography area; and
(c) at least one tristyrenated-p-cresol in an amount greater than 1 percent by total Gas Chromatography area,
wherein the composition comprises the monostyrenated-p-cresol and the tristyrenated-p-cresol, in combination, in an amount from 5 to 20 percent by total Gas Chromatography area.
2. The composition of claim 1 further comprising a co-stabilizer selected from the group consisting of phenolics, phosphites, diaryl amines, and epoxidized vegetable oils.
3. The composition of claim 2 , wherein the co-stabilizer is an organophosphite.
4. The composition of claim 3 , wherein the organophosphite is tris(nonylphenyl)phosphite.
5. The composition of claim 1 , wherein the co-stabilizer is a dialkylated diphenylamine.
6. A polymer article according to claim 1 comprising a thermoplastic, thermoelastomer or rubber and a liquid styrenated phenolic composition, from about 0.01 to about 10% by weight based on the total weight of the polymer article of the liquid styrenated phenolic composition.
7. The polymer article according to claim 6 , wherein the polymer is selected from the group consisting of polyolefins, PVC, polyurethanes, polyols and elastomers.
8. The polymer article of claim 6 , wherein the polymer is styrene-butadiene rubber.
9. The polymer article of claim 6 , wherein the polymer article comprises a polyol or a polyurethane and the composition exhibits low fog.
10. A lubricant according to claim 1 comprising a base stock of lubricating viscosity and from about 0.01 to about 10% by weight based on the total weight of the lubricant of the liquid styrenated phenolic composition.
11. The lubricant of claim 10 wherein the lubricant composition comprises the base stock in an amount greater than 90 weight percent, and the styrenated phenolic in an amount greater than 0.05 weight percent, based on the weight of the lubricant.
12. The lubricant of claim 11 , wherein the lubricant comprises the lubricant base stock in an amount greater than 95 weight percent, and the styrenated phenolic in an amount from 0.1 to 5 weight percent, based on the weight of the lubricant.
13. The lubricant of claim 10 , wherein the lubricant composition further comprises at least one antioxidant comprising one or more secondary diarylamines having the general formula:
formula:
(R 4 ) a —Ar 1 —NH—Ar 2 —(R 5 ) b
wherein Ar 1 and Ar 1 are independent and comprise aromatic hydrocarbons, R 4 and R 5 are independent and comprise hydrogen and hydrocarbyl groups and a and b are independent and 0 to 3, provided that (a+b) is not greater than 4.