US4517105A
Expired / Lapsed
US
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Metalworking lubricant composition containing a novel substituted malonic acid diester
Assignee: Alcoa Corp
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Filing: 1983-03-07
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Granted: 1985-05-14
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Expires: 2003-03-07
Abstract
Abstract A metalworking lubricant composition comprising a novel substituted diester of malonic acid having the general formula R1R2C(COOR3)(COOR4) wherein R1 is a C8-C18 linear alkyl group or a C8-C30 branched alkyl group or a C8-C30 alkyl aryl group; R2 is H or a C1-C18 linear alkyl group or a C8-C30 branched alkyl group or a C8-C30 alkyl aryl group; and R3 and R4 are C1-C4 linear or branched alkyl groups. The substituted malonic diester may be used either in neat form or as an additive to mineral oil. The metalworking lubricant composition of the invention imparts enhanced lubricity and wear resistance to the surfaces of metals such as aluminum and aluminum alloys.
Inventors
- 👤 Joseph T. Laemmle
- 👤 John Bohaychick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:14
CPC Classifications
C; C10; C10M; C10M129/00; C10M129/02; C10M129/26; C10M129/48; C10M129/52; C10M105/00; C10M105/08; C10M105/32; C10M105/36; C10M2207/00; C10M2207/28; C10M2207/282; C10M2207/34; C10N; C10N2040/00; C10N2040/20; C10N2040/24; C10N2040/241; C10N2040/242; C10N2040/243; C10N2040/244; C10N2040/245; C10N2040/246; C10N2040/247
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
107 words
A metalworking lubricant composition comprising (a) a minor proportion of a substituted malonic acid diester having the formula R 1 R 2 C(COOR 3 )(COOR 4 ), wherein R 1 is a C 8 -C 30 alkyl aryl group; R 2 is H or a C 1 -C 18 linear alkyl group or a C 8 -C 30 branched alkyl group or a C 8 -C 30 alkyl aryl group; and R 3 and R 4 are C 1 -C 4 linear or branched alkyl groups and (b) a major proportion of mineral oil, said substituted malonic acid diester constituting an additive dissolved in said mineral oil.
Claim 2
Dependent Claim
107 words
A metalworking lubricant composition comprising (a) a minor proportion of a substituted malonic acid diester having the formula R 1 R 2 C(COOR 3 )(COOR 4 ), wherein R 1 is a C 8 -C 30 alkyl aryl group; R 2 is H or a C 1 -C 18 linear alkyl group or a C 8 -C 30 branched alkyl group or a C 8 -C 30 alkyl aryl group; and R 3 and R 4 are C 1 -C 4 linear or branched alkyl groups and (b) a major proportion of mineral oil, said substituted malonic acid diester constituting an additive dissolved in said mineral oil.
Claim 3
Dependent Claim
20 words
The lubricant composition of claim 1 wherein R 3 and R 4 are C 1 -C 3 linear alkyl groups.
Claim 4
Dependent Claim
17 words
The lubricant composition of claim 1 wherein R 3 and R 4 are each an ethyl group.
Claim 5
Dependent Claim
103 words
A metalworking lubricant composition comprising (a) about 90-99 wt% mineral oil; and (b) about 1-10 wt% of a substituted malonic acid diester additive having the formula R 1 R 2 C(COOR 3 )(COOR 4 ), wherein R 1 is a C 8 -C 18 linear alkyl group or a C 8 -C 30 branched alkyl group; R 2 is H or a C 1 -C 18 linear alkyl group or a C 8 -C 30 branched alkyl group; and R 3 and R 4 are C 1 -C 4 linear or branched alkyl groups, said diester additive being dissolved in said mineral oil.
Claim 6
Dependent Claim
103 words
A metalworking lubricant composition comprising (a) about 90-99 wt% mineral oil; and (b) about 1-10 wt% of a substituted malonic acid diester additive having the formula R 1 R 2 C(COOR 3 )(COOR 4 ), wherein R 1 is a C 8 -C 18 linear alkyl group or a C 8 -C 30 branched alkyl group; R 2 is H or a C 1 -C 18 linear alkyl group or a C 8 -C 30 branched alkyl group; and R 3 and R 4 are C 1 -C 4 linear or branched alkyl groups, said diester additive being dissolved in said mineral oil.
Claim 7
Dependent Claim
32 words
The lubricant composition of claim 4 wherein R 1 is a C 8 -C 18 linear alkyl group and R 2 is a C 1 -C 18 linear alkyl group or H.
Claim 8
Dependent Claim
20 words
The lubricant composition of claim 5 wherein R 1 is an n-decyl group and R 2 is an n-propyl group.
Claim 9
Dependent Claim
18 words
The lubricant composition of claim 5 wherein R 1 is an n-decyl group and R 2 is H.
Claim 10
Dependent Claim
17 words
The lubricant composition of claim 5 wherein R 1 and R 2 are each an n-dodecyl group.
Claim 11
Dependent Claim
22 words
The lubricant composition of claim 1 comprising about 0.1-20 wt% of said additive dissolved in about 80-99.9 wt% of said mineral oil.
Claim 12
Dependent Claim
22 words
The lubricant composition of claim 1 comprising about 1-10 wt% of said additive dissolved in about 90-99 wt% of said mineral oil.
Claim 13
Dependent Claim
22 words
The lubricant composition of claim 1 comprising about 5 wt% of said additive dissolved in about 95 wt% of said mineral oil.
Claim 14
Independent Claim
144 words
A method for imparting lubricity and wear resistance to a metal surface, said method comprising applying to said surface a metalworking lubricant composition comprising (a) a minor proportion of a substituted malonic acid diester having the formula R 1 R 2 C(COOR 3 )(COOR 4 ), wherein R 1 is a C 8 -C 18 linear alkyl group or a C 8 -C 30 branched alkyl group or a C 8 -C 30 alkyl aryl group; R 2 is H or a C 1 -C 18 linear alkyl group or a C 8 -C 30 branched alkyl group or a C 8 -C 30 alkyl aryl group; and R 3 and R 4 are C 1 -C 4 linear or branched alkyl groups; and (b) a major proportion of mineral oil, said substituted malonic acid diester constituting an additive dissolved in said mineral oil.
Claim 15
Independent Claim
144 words
A method for imparting lubricity and wear resistance to a metal surface, said method comprising applying to said surface a metalworking lubricant composition comprising (a) a minor proportion of a substituted malonic acid diester having the formula R 1 R 2 C(COOR 3 )(COOR 4 ), wherein R 1 is a C 8 -C 18 linear alkyl group or a C 8 -C 30 branched alkyl group or a C 8 -C 30 alkyl aryl group; R 2 is H or a C 1 -C 18 linear alkyl group or a C 8 -C 30 branched alkyl group or a C 8 -C 30 alkyl aryl group; and R 3 and R 4 are C 1 -C 4 linear or branched alkyl groups; and (b) a major proportion of mineral oil, said substituted malonic acid diester constituting an additive dissolved in said mineral oil.
Claim 16
Dependent Claim
14 words
The method of claim 12 wherein said metal is aluminum or an aluminum alloy.
Claim 17
Dependent Claim
21 words
The method of claim 12 wherein said metal is an aluminum alloy of the 1000 series or of the 5000 series.
Claim 18
Dependent Claim
25 words
The method of claim 12 wherein said lubricant composition comprises about 1-10 wt% of said additive dissolved in about 90-99 wt% of said mineral oil.
Claim 19
Dependent Claim
31 words
The method of claim 12 wherein R 1 is a C 8 -C 18 linear alkyl group and R 2 is a C 1 -C 18 linear alkyl group or H.
Claim 20
Dependent Claim
19 words
The method of claim 16 wherein R 3 and R 4 are C 1 -C 3 linear alkyl groups.
Claim 21
Dependent Claim
16 words
The method of claim 16 wherein R 3 and R 4 are each an ethyl group.
Claim 22
Dependent Claim
29 words
The method of claim 16 wherein R 1 and R 2 are selected from the group consisting of an n-dodecyl group, an n-decyl group, an n-propyl group and H.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-05-13 | 1988-11-12 | 1989-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-13 | 1992-11-12 | 1993-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-13 | 1996-11-12 | 1997-05-14 | $7700.00 | Window Closed / Lapsed |