US3985802A
Expired / Lapsed
US
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Lubricating oils containing high molecular weight Mannich condensation products
Assignee: Ethyl Corp
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Filing: 1974-10-08
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Granted: 1976-10-12
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Expires: 1994-10-08
Abstract
Abstract Oil soluble high molecular weight Mannich condensation products formed by reacting (1) high molecular weight alkyl-substituted hydroxy aromatic compounds whose alkyl-substituent has a number average molecular weight (Mn) from about 600-100,000, (2) a compound containing at least one HN < group, and (3) an aldehyde in the respective molar reactant ratio of 1:0.1-10:1.0-10, are highly efficient ashless type (metal free) dispersant-detergent lubricant oil addition agents. Lubricating oils containing these compositions provide a high degree of protection against the deposition of sludge and varnish and corrosion when used as crankcase lubricants. Bis-Mannich products prepared by condensing (1) a 850-2500 Mn polyalkyl-substituted phenol, (2) an alkylene polyamine and (3) formaldehyde in the respective molar ratio of 1.0:0.7-1.0:1.5-2.1 are novel products and are especially effective for high severity detergent-dispersant function over the extended oil drain range of crankcase lubricant oils recommended by automobile manufacturers.
Inventors
- 👤 Edmund J. Piasek
- 👤 Robert E. Karll
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:50
CPC Classifications
C; C10; C10M; C10M159/00; C10M159/12; C10M159/16; C07; C07C; C07C275/00; C07C275/04; C07C275/06; C07C275/14; C07F; C07F5/00; C07F5/02; C07F5/022; C07F5/04; C08; C08F; C08F8/00; C08F8/30; C08F8/32; C08F8/42; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/06; C10M2215/062; C10M2215/064; C10M2215/065; C10M2215/10; C10M2215/102; C10M2215/22; C10M2215/221; C10M2215/223; C10M2215/224; C10M2215/225; C10M2215/226; C10M2215/24; C10M2215/26; C10M2215/30; C10M2217/00; C10M2217/04; C10M2217/046; C10M2217/06; C10M2219/00; C10M2219/04; C10M2219/044; C10M2219/046; C10M2219/06; C10M2219/062; C10M2219/064; C10M2219/066; C10M2221/00; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/045; C10M2227/00; C10M2227/06; C10M2227/061; C10N; C10N2010/00; C10N2010/04; C10N2010/06; C10N2030/00; C10N2030/12; C10N2050/00; C10N2050/015; C10N2050/02; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
67 words
An oil-soluble high molecular weight Mannich product from the condensation of reactants: 1. a high molecular weight alkyl-substituted phenol wherein said alkyl-substituent has an average number of carbon atoms of from 50 to 20,000 carbon atoms; 2. an amine havng the formula: ##EQU1## wherein x is an integer from 1 to 10 and A is a divalent saturated hydrocarbon group having 2 to 3 carbon atoms; and
Claim 2
Dependent Claim
67 words
An oil-soluble high molecular weight Mannich product from the condensation of reactants: 1. a high molecular weight alkyl-substituted phenol wherein said alkyl-substituent has an average number of carbon atoms of from 50 to 20,000 carbon atoms; 2. an amine havng the formula: ##EQU1## wherein x is an integer from 1 to 10 and A is a divalent saturated hydrocarbon group having 2 to 3 carbon atoms; and
Claim 3
Dependent Claim
45 words
a formaldehyde affording reactant wherein the respective reactant molar ratio is 1.0:0.7- 1.0:1.5- 2.1 prepared by combining reactants (1) and (2), adding thereto reactant (3) and heating the resulting mixture to a temperature in the range of 100°-350° F under conditions which remove by-product water.
Claim 4
Dependent Claim
45 words
a formaldehyde affording reactant wherein the respective reactant molar ratio is 1.0:0.7- 1.0:1.5- 2.1 prepared by combining reactants (1) and (2), adding thereto reactant (3) and heating the resulting mixture to a temperature in the range of 100°-350° F under conditions which remove by-product water.
Claim 5
Dependent Claim
78 words
The oil-soluble Mannich product of claim 1 wherein the alkyl-substituent of reactant (1) is polypropyl or polybutyl of 700 to 2500 M n and wherein the mixture of reactants (1) and (2) and two-thirds of reactant (3) is heated to a temperature in the range of 130-300° F until the resulting mixture is dehydrated and thereafter adding the remainder of reactant (3) and heating this mixture to a temperature of from 250-350° F until this mixture is dehydrated.
Claim 6
Dependent Claim
109 words
The oil-soluble Mannich product of claim 1 wherein reactant (1) is 1713 M n polybutylphenol; in reactant (2) A is --CH 2 --CH 2 -- and x is 4; reactant (3) is formaldehyde; and the respective reactant molar ratio is 1.0:1.0:2.0 prepared by combining reactants (1) and (2), adding thereto one-half of reactant (3) at 180° F and heating the mixture to a temperature of 320° F under conditions which remove by-product water, cooling the water-free reaction mixture to a temperature of 180° F, adding thereto the remaining one-half of reactant (3), and heating the resulting mixture to a temperature of 320° F under conditions which remove by-product water.
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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) | 1979-10-12 | 1980-04-12 | 1980-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-12 | 1984-04-12 | 1984-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-12 | 1988-04-12 | 1988-10-12 | $7700.00 | Window Closed / Lapsed |