US3668237A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Amine salts of phosphinic acid esters
Assignee: Universal Oil Products Co
•
Filing: 1969-06-24
•
Granted: 1972-06-06
•
Expires: 1989-06-24
Abstract
Abstract Tertiary amine salts of polycarboxylic acid esters of bis(hydroxyalkyl)-phosphinic acid. These compounds are useful as additives for lubricating oil, grease and organic substances normally subject to oxidative deterioration and, also serving to prevent wear or corrosion of metallic components.
Inventors
- 👤 Henryk A Cyba
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:52
CPC Classifications
C; C10; C10M; C10M137/00; C10M137/12; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/30; C07F9/32; C07F9/3205; C07F9/3211; C10M2201/00; C10M2201/02; C10M2201/04; C10M2201/041; C10M2201/10; C10M2201/102; C10M2201/103; C10M2201/105; C10M2201/14; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/024; C10M2207/026; C10M2207/04; C10M2207/046; C10M2207/10; C10M2207/12; C10M2207/125; C10M2207/129; C10M2207/16; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/286; C10M2207/30; C10M2207/34; C10M2207/40; C10M2207/402; C10M2207/404; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2209/10; C10M2209/103; C10M2209/105; C10M2209/108; C10M2211/00; C10M2211/02; C10M2215/00; C10M2215/10; C10M2215/102; C10M2215/12; C10M2215/122; C10M2217/00; C10M2217/04; C10M2217/044; C10M2217/045; C10M2219/00; C10M2219/04; C10M2219/044; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2223/042; C10M2223/06; C10M2223/061; C10M2227/00; C10M2227/02; C10M2229/00; C10M2229/02; C10M2229/04; C10M2229/041; C10M2229/043; C10M2229/044; C10M2229/05; C10N; C10N2010/00; C10N2010/02; C10N2010/04; C10N2010/06; C10N2030/00; C10N2030/12; C10N2040/00; C10N2040/02; C10N2040/08; C10N2040/135; C10N2040/20; C10N2040/22; C10N2040/24; C10N2040/241; C10N2040/242; C10N2040/243; C10N2040/244; C10N2040/245; C10N2040/246; C10N2040/247; C10N2040/25; C10N2040/252; C10N2040/253
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
13 words
The salt of claim 1 in which said anhydride is dodecenyl succinic anhydride.
Claim 2
Dependent Claim
31 words
The salt of claim 1 prepared by first reacting an equal mole proportion of said trialkyl amine from said bis-(hydroxyalkyl)-phosphinic acid at a temperature from about 75* to about 200* C..
Claim 3
Dependent Claim
35 words
The salt of claim 3 being esterified by reacting with said succinic anhydride at a temperature of from about 80* to about 240* C., the ratio of salt to anhydride being from 1:1 to 1:2.
Claim 4
Dependent Claim
13 words
The salt of claim 1 in which said bis-(hydroxyalkyl)-phosphinic acid is bis-(hydroxymethyl)-phOsphinic acid.
Claim 5
Dependent Claim
20 words
The salt of claim 1 in which said trialkyl amine contains from one to 20 carbon atoms in each alkyl.
Claim 6
Dependent Claim
102 words
A salt of a tri-alkyl amine containing 3 to 60 carbon atoms and a polycarboxylic acid ester of bis-(hydroxyalkyl)-phosphinic acid, wherein the polycarboxylic acid ester moiety is an alkenyl substituted succinic moiety containing from 30 to 400 carbon atoms, and the bis-(hydroxyalkyl)-phosphinic acid constituent contains from one to 18 carbon atoms in said alkyl, prepared by first forming the trialkyl amine salt of said bis-(hydroxyalkyl)-phosphinic acid, then esterifying the salt by heating with an alkyl or alkenyl substituted succinic acid or anhydride, the molar ratio of said salt to acid or anhydride being from 1:1 to 1:2, and recovering the resultant salt.
Claim 7
Dependent Claim
116 words
A salt of a tri-alkyl amine containing 3 to 60 carbon atoms and a polycarboxylic acid ester of bis-(hydroxy-alkyl)-phosphinic acid, wherein the polycarboxylic acid ester moiety is derived from a C4-C20 alkyl or C4-C20 alkenyl substituted dicarboxylic acid or anhydride selected from the group consisting of succinic, glutaric and adipic acid or anhydride, and the bis-(hydroxyalkyl)-phosphinic acid constituent contains from one to 18 carbon atoms in said alkyl, prepared by first forming the tri-alkyl amine salt of said bis-(hydroxyalkyl)-phosphinic acid, then esterifying the salt by heating with said alkyl or alkenyl substituted dicarboxylic acid or anhydride, the molar ratio of said salt to acid or anhydride being from 1:1 to 1:2, and recovering the resultant salt.
Claim 8
Dependent Claim
119 words
A salt of a tri-alkyl amine containing three to 60 carbon atoms and a polycarboxylic acid ester of bis-(hydroxyalkyl)-phosphinic acid, wherein the polycarboxylic acid ester moiety is derived from an alkenyl substituted dicarboxylic acid or anhydride selected from the group consisting of succinic, glutaric and adipic acid or anhydride, containing from 30 to 400 carbon atoms, and the bis-(hydroxyalkyl)-phosphinic acid constituent contains from one to 18 carbon atoms in said alkyl, prepared by first forming the tri-alkyl amine salt of said bis-(hydroxyalkyl)-phosphinic acid, then esterifying the salt by heating with said alkyl or alkenyl substituted dicarboxylic acid or anhydride, the molar ratio of said salt of acid or anhydride being from 1:1 to 1:2, and recovering the resultant salt.
References Cited (Backward Citations)
US3499923A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-06 | 1975-12-06 | 1976-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-06 | 1979-12-06 | 1980-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-06 | 1983-12-06 | 1984-06-06 | $7700.00 | Window Closed / Lapsed |