# US 8,772,208 B2 · Additive agent, oil filter and lubricating device for machine

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- Number: US 8,772,208 B2
- Document ID: US8772208B2
- Status: Granted
- Kind: B2
- Application number: 13/379,877
- Filed: 2011-03-18
- Published: 2012-09-20
- Granted: 2014-07-08
- Earliest claimed: 2011-03-18
- Assignees: Toyota Jidosha Kabushiki Kaisha
- Applicants: Ippei Fukutomi; Norio Inami; Kenichi Harada; Motoichi Murakami; Koji Morita; Takahiko Fujiwara
- Inventors: Ippei Fukutomi; Norio Inami; Kenichi Harada; Motoichi Murakami; Koji Morita; Takahiko Fujiwara
- Web page: https://patentgrep.com/patent/US8772208B2

## CPC

- C10M 125/10: Metal oxides, hydroxides, carbonates or bicarbonates
- C10M 175/0091: {Treatment of oils in a continuous lubricating circuit (e.g. motor oil system)}
- C10M 2201/02: Water
- C10M 2201/062: Oxides; Hydroxides; Carbonates or bicarbonates
- C10N 2030/02: Pour-point; Viscosity index
- C10N 2030/10: Inhibition of oxidation, e.g. anti-oxidants
- C10N 2040/25: Internal-combustion engines
- C10N 2040/252: {Diesel engines}
- C10N 2040/255: {Gasoline engines}
- C10M: LUBRICATING COMPOSITIONS (well drilling compositions C09K8/02); USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION (mould release, i.e. separating, agents for metals B22C3/00, for plastics or substances in a plastic state, in general B29C33/56, for glass C03B40/02; textile lubricating compositions D06M11/00, D06M13/00, D06M15/00; immersion oils for microscopy G02B21/33)
- C10N: INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS

## Abstract

The present invention provides an additive agent to be added to oil and comprising weak basic hydrotalcite. At the time of adding a mixture of hydrotalcite of 1 weight % and water by 3 weight % to the oil where a hydrogen ion exponent is within a range of 6 to 7 for stirring, the weak basic hydrotalcite is hydrotalcite where the obtained oil indicates the hydrogen ion exponent within a range of 6 to 7. Such an additive agent can be accommodated in an oil filter (36) for use.

## Claims

### Claim 1

An additive agent to be added to engine oil, comprising:
weak basic hydrotalcite;
wherein
the weak basic hydrotalcite has a composition of
Mg8-xAlx(OH)y(CO3)z.mH2O,
wherein x is 2, y is 1 and z is 16 and m is a positive rational number.

### Claim 2 (depends on 1)

An additive agent according to claim 1, wherein
at the time of adding a mixture of hydrotalcite of 1 weight % and water by 3 weight %, with reference to a total amount of the mixture and the oil, to the oil for stifling, the oil indicating a hydrogen ion exponent within a range of 6 to 7, the weak basic hydrotalcite is hydrotalcite where the obtained oil indicates the hydrogen ion exponent within a range of 6 to 7.

### Claim 3 (depends on 1)

An additive agent according to claim 1, wherein
the weak basic hydrotalcite is hydrotalcite where a mixture of hydrotalcite of 3 weight % and water indicates a hydrogen ion exponent of 7 or more to 10 or less.

### Claim 4 (depends on 1)

An oil filter comprising the additive agent according to claim 1.

### Claim 5 (depends on 4)

An oil filter according to claim 4, further comprising an additive agent of hydrolyzing.

### Claim 6 (depends on 1)

A lubricating device for a machine comprising the additive agent according to claim 1.

### Claim 7 (depends on 6)

A lubricating device for a machine according to claim 6, further comprising an additive agent of hydrolyzing.

### Claim 8 (depends on 4)

A lubricating device for a machine comprising the oil filter according to claim 4.