Claims
- 1. A substantially free haze oil solution concentrate composition comprising a mineral hydrocarbon oil of lubricating viscosity and from about 0.1 to 50 wt. % based on the total weight of said composition of a viscosity index improving hydrogenated copolymer of butadiene or isoprene with 20 to 70 wt. % of copolymerized stryene, the copolymer having an M.sub.n of 20,000 to 200,000 wherein said composition has been treated at a temperature of about 50.degree. C. to 150.degree. C. with from about 0.75 to 25% by weight based on the weight of said concentrate with an oil soluble alkyl hydroxy benzene compound, said compound having 1 to 3 C.sub.2 -C.sub.20 alkyl groups and 1-3 hydroxy groups.
- 2. The composition of claim 1 wherein said composition is treated with 2-8 wt. % of nonyl phenol or dodecyl phenol.
- 3. A lubricating oil composition containing 5 to 15 wt. % of the haze free solution concentrate of claims 1 or 2.
Parent Case Info
This is a division of application Ser. No. 003,780 filed 1-16-87 which is a Rule 60 continuation of Ser. No. 709,680 filed 3-8-85 which is a Rule 60 continuation of Ser. No. 278,179 filed 6-29-81 both abandoned.
US Referenced Citations (12)
Divisions (1)
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Date |
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3780 |
Jan 1987 |
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Continuations (2)
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709680 |
Mar 1985 |
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278179 |
Jun 1981 |
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