Solid anti-friction devices – materials therefor – lubricant or se – Lubricants or separants for moving solid surfaces and... – Heterocyclic ring compound; a heterocyclic ring is one...
Patent
1999-03-29
2000-10-24
Howard, Jacqueline V.
Solid anti-friction devices, materials therefor, lubricant or se
Lubricants or separants for moving solid surfaces and...
Heterocyclic ring compound; a heterocyclic ring is one...
508273, 508436, 508438, 508442, 508463, 508465, C10M14102, C10M14108, C10M14110
Patent
active
061367591
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a novel additive composition, and more precisely, to a novel additive composition having good load carrying capacity.
BACKGROUND OF THE INVENTION
Metal working oils such as forging oil, pressing oil, drawing oil, rolling oil, cutting oil, grinding oil and others comprise mineral oil, synthetic oil and/or hydrous oil (e.g., emulsion, solution, etc.), to which are added various oiliness agents and extreme-pressure agents as additives for the purpose of improving their working performance. Above all, the additives for forging oil are required to have load carrying capacity.
In internal-combustion engines, driving systems (automatic transmissions, buffers, power steering wheels, etc.), gears and others, used is lubricating oil for promoting their smooth operation. However, in the recent high-power and high-load situation for them, their lubricity is often unsatisfactory, thereby resulting in that the lubricative surface in them is exposed to much friction and worn whereby they may seize up. To evade the problem, therefore, various oiliness agents and extreme-pressure agents are added as additives to the lubricating oil for them. The additives are required to have good load carrying capacity. For meeting the requirement, various types of additives have heretofore been developed, but are still not fully satisfactory.
Recently, however, it has been said that some additives will have negative influences on the working environment and even on the natural environment. Therefore, it is desirable that the additives with that possibility are not used as much as possible. In particular, it is specifically said that additives containing chlorine or lead have negative influences on human bodies and the natural environment. In addition, it is said that zinc, molybdenum, alkali metals and alkaline earth metals will have the possibility of negative influences on the natural environment and the working environment.
The invention has been made in consideration of the matters noted above, and its object is to provide a novel additive composition having good load carrying capacity, in particular, to provide a novel additive composition having high load carrying capacity and having little possibility of negative influences on the working environment and the natural environment.
DISCLOSURE OF THE INVENTION
We, the present inventors have assiduously studied and, as a result, have found that a combination of an extreme-pressure improver that contains sulfur and/or phosphorus and an acrylate or methacrylate compound can effectively attain the object of the invention. On the basis of this finding, we have completed the invention. Specifically, the subject matter of the invention includes the following: molecule, a group of a general formula (I): ##STR2## wherein R.sup.1, R.sup.2 and R.sup.3 each represent a hydrogen atom or a methyl group, but at least one of R.sup.2 and R.sup.3 is a hydrogen atom, component (c), an extreme-pressure improver containing neither sulfur nor phosphorus. does not contain a halogen compound. component (b) does not contain a lead compound. component (c) does not contain a halogen compound. component (c) does not contain a lead compound. component (b) does not contain a metal compound. component (c) does not contain ametal compound.
BEST MODES FOR CARRYING OUT THE INVENTION
Embodiments of the invention are described below.
The compound of the component (a) that constitutes the invention has, in the molecule, a group of a general formula (I): ##STR3##
In formula (I), R.sup.1, R.sup.2 and R.sup.3 each represent a hydrogen atom or a methyl group, but at least one of R.sup.2 and R.sup.3 is a hydrogen atom. The compound may have one group of formula (I) or a plurality of the groups.
Examples of the compound having the group of formula (I) include polyethylene glycol diacrylate; polyethylene glycol dimethacrylate; caprolactone-modified hydroxypivalic acid neopentyl glycol ester diacrylate; caprolactone-modified hydroxypivalic acid neopentyl glycol ester dim
REFERENCES:
patent: 3125527 (1964-03-01), Krug et al.
patent: 3208941 (1965-09-01), Owens
patent: 3884995 (1975-05-01), Seiler
patent: 4664825 (1987-05-01), Walsh
patent: 6008168 (1999-12-01), Takagi et al.
Abe Kazuaki
Ichitani Katsumi
Kanno Norihito
Takagi Fumiaki
Yamanaka Masami
Howard Jacqueline V.
Idemitsu Kosan Co. Ltd.
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