Mineral base oil, molded article, and method for producing mineral base oil

Patent metadata

Field	Value
Publication number	US-11421170-B2
Application number	US-201816632706-A
Country	US
Kind code	B2
Filing date	Nov 12, 2018
Priority date	Nov 10, 2017
Publication date	Aug 23, 2022
Grant date	Aug 23, 2022

Abstract

Provided are a mineral base oil satisfying the following requirements (I) to (IV), which is excellent in safety and environmental aspects and has good compatibility with resin; a molded article formed of a resin composition containing the mineral base oil and a resin; and a method for producing the mineral base oil. Requirement (I): The flash point is 200° C. or higher. Requirement (II): The pour point is 0° C. or lower. Requirement (III); The aromatic content (% CA) is 2.6 or more. Requirement (IV): The toluene content, as measured according to JIS A1965:2015, is more than 0 μg/m3 and less than 500 μg/m3.

First claim

The invention claimed is:

1. A mineral base oil,
satisfying requirements (I) to (IV):
(I): a flash point is 200° C. or higher;
(II): a pour point is 0° C. or lower;
(III): an aromatic content (% C A ) obtained according to ASTM D-3238 1995 ring analysis is 2.6 to 4.2; and
(IV): toluene content, as measured according to JIS A-1965:2015, is more than 0 μg/m 3 and less than 500 μg/m 3 .

2. The mineral base oil of claim 1 , wherein the toluene content of (IV) is 3.0 μg/m 3 or more and less than 500 μg/m 3 .

3. The mineral base oil of claim 1 , further satisfying the following requirement (V):
(V): a sulfur atom content is, based on a total amount of the mineral base oil, less than 500 ppm by mass.

4. A rubber resin or a thermoplastic elastomer, comprising the mineral base oil of claim 1 .

5. A molded article, formed of a resin composition comprising the mineral base oil of claim 1 and one or more resins selected from the group consisting of a rubber resin and a thermoplastic elastomer.

6. A method for producing the mineral base oil of claim 1 , the method comprising:
(α): solvent-dewaxing a feedstock oil, using a solvent comprising toluene, to obtain a solvent-dewaxed oil.

7. The method of claim 6 , further comprising, after (α):
(β): subjecting the solvent-dewaxed oil obtained in (α) to a finishing treatment comprising at least a steam treatment.

8. The method of claim 7 , wherein the steam treatment of (β) satisfies the following requirements (i) to (iii), wherein X represents a degasification tank inlet temperature (COT) (°C.), and Y represents a ratio of a steam flow rate (STM) to a feed flow rate (FEED) [STM/FEED]:
(i): X≥200,
(ii): Y≥0.0300, and
(iii): 240-640×Y<X.

9. A method of producing a composition, the method comprising mixing the mineral base oil of claim 1 with one or more resins selected from the group consisting of a rubber resin and a thermoplastic elastomer.

Assignees

• Idemitsu Kosan Co

Inventors

• Goto Kenji
• Rokkaku Hitoshi
• Yamamoto Yuta

Classifications

• C10M101/02 Primary

  Petroleum fractions · CPC title

• C10N2020/01

  Physico-chemical properties · CPC title

• C10G2400/10

  Lubricating oil · CPC title

• C10N2030/02

  Pour-point; Viscosity index · CPC title

• C08L21/00

  Compositions of unspecified rubbers · CPC title