MXPA97007193A - Fibr polyurea grease - Google Patents

Abstract

The present invention relates to a fibrous fat comprising a base oil and a fibrous diurea thickener comprising the reaction product of toluene diisocyanate, an aliphatic amino fat and an alkyl phenyl amine.

Description

FIBROSA POLYUREA GREASE Background and Description of the Irination This invention relates to a fibrous fat comprising a base oil and a diurea thickener comprising the reaction product of toluene diisocyanate, an aliphatic amino fat and an alkylphenyl amine. more particularly, this invention relates to a fibrous fat comprising a base oil and a first diurea thickener comprising the reaction product of toluene diisocyanate, an aliphatic amino fat and an alkylphenyl amine and second thickness comprising the reaction product of toluene diisocyanate, amino cycloalkyl and aliphatic amino fat.

Quantity of fats have been developed over the years for various purposes. The so-called fibrous barium fats, which are ordinary and sticky, have been used due to their high service stress to prevent them from coming into contact metal-to-metal in the notches of trailers and in railway clutches. These barium fats have been banned in some places to prevent these fibrous barium fats have been generally satisfactory in terms of the intensity of their use, they also have the disadvantage that they spill when used at elevated temperatures and tend to harden when They are stored in containers. Accordingly, there is a need for more acceptable fibrous fats in the environment.

Yasui et al., 4,668,411, discuss the pros and cons of several do-fats. di? roa on column 1, line 43, to column 7, line 5. the reference states that dihydrocarbyl ureas have the disadvantage that: (1) both hydrocarbyl groups are at least 12 carbon atoms of markedly fibrous softeners and therefore can not be used at high temperatures; (2) both hydrocarbyl groups are alkyls of up to 11 carbon atoms, the fat is fibrous and reliable to fragment under high speed conditions and has little life and; (3) If one of the hydrocarbyl groups is aromatic or an alicyclic ring, the fat has little mechanical stability and short life.

The patent then claims to have better properties in case one of the hydrocarbyl groups is cyclohexyl and the other monoalkylphenyl containing from 8 to 6 carbon atoms in the alkyl groups. Kinoshita et al., 4,780,231 is more or less cumulative from Yasui et al., But maintains better properties if diurea is formed from primary amine and secondary amine and at least one amine contains a cyclohexyl group.

The general objective of this invention is to provide a fibrous fat that does not contain barium. A more specific objective of this invention is to provide a fibrous fat that does not contain barium, since it has less tendency to spill than fibrous barium fats and reduces the tendency to harden in containers. Other objectives will appear from here on.

The general objective of this invention can be achieved with a fibrous fat comprising a base oil and a diurea thickener comprising the reaction product of toluene diisocyanate, an aliphatic amino fat and an alkylphenyl amine. Fats that consist essentially of these two components are fibrous and have a high drip point, making them suitable to replace fibrous barium fats. When the thickener comprises a first diurea comprising the reaction product of toluene diisocyanate, an aliphatic amine loop and an alkylphenyl amine, and a second diurea thickener comprising the reaction product of toluene diisocyanate, amino cycloalkyl and aliphatic amino fat , the fat is fibrous, has a high drip point, is resistant to high temperature spillage and does not harden during storage in lg containers. All the greases of this invention can be used to prevent metals from coming into contact in the towing notches and rail clutches.

Briefly, the essential fibrous diurea thickener useful in this invention can be prepared by the reaction in a toluene diisocyanate of base oil, an aliphatic amino fat and an alkylphenyl amine.

Suitable aliphatic amino fats useful in this invention are from 8 carbon atoms to 20 carbon atoms of amino alkyl, such as the amino octyl-n, amino 2-ethylexyl, amino octadecyl, tallow amine (mixture of 16 carbon atoms). carbon and 18 carbon atoms of amino alkyl) hydrogenated tallow amine, amino alkenyl, such as amino oleyl, etc.

T, 3s alkylsulfon 1 amines suitable and useful in this invention inchiypn from 1 carbon atom to 4 carbon atoms of orlo, eta or for aikilienii amine, such as ortho or para l? Loudin? Para-etiltmilina, paxa-isopropilanilina, para tort-hufi 1 ani 1 i na, ortho-nb? ti 1 ani 1 i na, ote.

The fibrous diuretic may have a molar ratio of aliphatic amino to alkylaminyl amine of about 9: 1 to 1: 9, preferably Z: 3 to 3: Z. Better results have been obtained in terms of the equivalent quantities of amino-fatty acids and alkyl-amine.

F, I di i sor-i anat.o of toluene nmprrial which consists of a mixture of 2,4 and 2, b-diisocyanates, is diise > eianal? of toluene.

Suitable base and liquid oils useful in this invention include any oil that is commonly used as a base lubricating oil, such as mineral oil, polybutane, synthetic, vegetable oil, animal oil, etc.

The fibrous diurea can be prepared by the reaction of about .5 to 1.5 equivalents of amines per equivalent of diisocyanate in oil or liquids and heating them until a gel forms. For example, the diisocyanate and amines may be dispersed or suspended separately in the oil and then the two dispersions or suspensions mixed together and heated to about 100 ° F to 350 ° F until they form a diurea gel.

As indicated above, the diurea fibrous or first diurea thickener is preferably used in conjunction with a second diurea thickener comprising the reaction product of toluene diisocyanate, amino cycloalkyl and aliphatic amino fat.

The toluene diisocyanate and the amino aliphatic fat suitable for forming the second diurea thickener can be any of those that were used to form the first diurea or fibrous thickener and preferably the same compounds that were used in each thickener.

Suitable amino cycloalicyls for the formation of the second diurea thickener include amino cycloalkionium, methyl methallyl, amino ethylcyclohexyl, amino dicyclohexyl-N, N, etc.

The second diurea thickener may have a mole ratio of amino aliphatic amino cycloalkyl fat of about 9: 1 to 1:, preferably 2: 3 to 3: 2. The best results were obtained by fully utilizing the equivalent amounts of aliphatic amino and amino cycloalkyl.

The second diurea thickener can be prepared by reacting about .5 to 1.5 equivalents of amine per equivalent of diisocyanate in oil or liquid and heating them until they form a gel preferably under shear. For example, the diisocyanate and the amine may be dispersed or in suspension separately in oil and then the two dispersions or suspensions are mixed together and heated to about 100 ° F to 350 ° F until they form a diurea gel.

The first and second diurea thickeners can be processed separately and then stirred with more base oil if desired. Alternatively, either the first or the second diurea thickener can be made in the presence of the other. The best results were obtained by preparing the first thickener or fibrous thickener in a dispersion of the second diurea thickener and then adding additional base oil.

For example, a fibrous fat comprising base oil and a first or fibrous diurea thickener and a second diurea thickener can be prepared: (1) by reacting a base oil dispersion of toluene diisocyanate, cycloalkyl amide and aliphatic amino fat (preferably , equal concentrations of mol of toluene diisocyanate, amino cisloalkyl and amino-aliphatic fat) until all the isocyanate groups have reacted completely to form a diurea thickener (2) dispersing the amino-aliphatic fat and the amino-cycloalkyl in the product Reaction step (1); (3) then adding toluene diisocyanate to the dispersion of step (2) (preferably equal amounts of mol of toluene diisocyanate, amino cycloalkyl and aliphatic amino fat to those used in steps 2 and 3) and reacting them until that all the isocyanate groups have reacted completely to form a fibrous diurea thickener in situ.

The weight ratio of the first diurea or fibrous thickener to the second diurea thickener can be advantageously from 1: 1 to 19: 1, preferably from 2: 1 to 9: 1.

In any case, the diurea mixture is stirred until the polyurea fat has a desired consistency. Either before or after shaking from 100 ° F to 350 ° F under shear, the diurea thickener can be diluted with a base or liquid oil to approximately 2 to 15 percent by weight of diurea.

Any conventional additive can then be added, such as another thickener, an extreme pressure additive, an antioxidant, an anti-corrosive, a Viscocity Index improver, etc.

E'jexapl? 1 After the dispersion of 100.9 parts by weight of toluene diisocyanate in 4.320 parts by weight of 750 SUS viscosity oil was heated to 120 ° F, 57.6 parts by weight of amino cyclohexyl were added slowly followed by 152.4 parts by weight. Amino weight of tallow and the temperature was maintained from 120 ° F to 135 ° until all the toluene diisocyanate reacted completely (The I ... did not show its peak at about 2270 (-lem)). Then they were added by agitation of 120 ° F to 135 ° F, 2, 586 parts by weight of 750 SUS oil, 219.6 parts by weight paratoluidine and 614.4 parts by weight of tallow amino forming a smooth dispersion of amino in the first composition diurea oil thickener. Four hundred and nine parts by weight of toluene diisocyanate was added slowly while maintaining the temperature from 120 ° F to 135 ° F. After the temperature was raised from 310 ° F to 32 ° F, there were added 1,800 parts by weight of 750 SUS oil, 1,200 parts by weight of 3 CaC 3 atoms, 360 parts by weight of nitrate-treated clay. sodium, CO parts by weight of alkylated diphenylamine and 120 parts by weight of M0S2 forming an excellent firstable diurea fat. The fibrous matrix was tested against a fibrous barium fat and the results are as set forth in the following Table I.

TABLE I PoLiurea Method ASTM Test Fibrous Bario Density (1 pound / gaLon) 7.78 7.76 Penetration® "? 7 ° F D-21" worked 60 strokes 278 275 tra.obed 10,000 (change) 34YES + 68; 321 (+46) Worked 100,000 (change) 372 (+ 94; 380 (+ 105) Without bothering (change) 320 (+42) 370 { + 95.} .24 hour; 24 hours They worked 100,000 weight / 10% 340 (+ 62; 375 (+100) 3ethlehem Steel Test 330 (+52; Liquid Worked 60X (change) TABLE I (continued; Polyurea Method ASTM Test Fibrous Barium Tstab: balance lidac (change) D-1831 330 (+ 52; 300 (+ 25 / Anti-xative protection D-1743 passes Fission fission Territory failure, ° F D-2265 58 411 water removal D -1 64 8176 ° F 13. 19.7 Oil separation,% loss D-1742 C.2 0.01 Characteristics of base oil Vis @ 43DcSt D-445 14S-6 146-6 Vis @ 1000 ° cSt D-445 11.64 11.64 Viscosity index D-2270 51 TABLE I (continued) Polyurea Method Test ASTM Fibros a Bario LineoLn Ventometer D-4049 @ 74 ° F 250 psi-300psi @ 0 ° T 1800 ps: 1800psi Copper corrosion D-4048 IB IB Conveyor Ceiteite D-4'593 21.0 24.0 torsion at low temperature, N Protection against erosion, loss of irg D-4170 2.3 7.6

Claims (14)

1. A fibrous fat comprising a base oil and a fibrous diurea thickener comprising the reaction product of toluene diisocyanate, an aliphatic amino fat and an amino alkylphenyl.

2. The fat according to claim 1, wherein the molar ratio of the aliphatic amino fat to the amino alkylphenyl in the thickness of fibrous diurea is from 9: 1 to 1: 9.

3. The grease according to claim 1, wherein the mole of the aliphatic amino fat to the amino alkylphenyl in the thickness of fibrous diurea is from 2: 3 to 3.2 and the alkylphenyl amino is from 1 carbon atom to 4 carbon atoms. alkylphenyl amine carbon.

4. The fat according to claim 3, wherein the aliphatic amino fat comprises at least one member selected from the group consisting of tallow amino, hydrogenated tallow amino and amino oleyl.

5. A fibrous fat comprising a base oil and a first siurea thickener comprising the reaction product of toluene diisocyanate, an aliphatic amino fat and an amino alkylphenyl and a second diurea thickener comprising the reaction product of toluene diisiocinate, amino cyclohexyl and an amino-aliphatic rasa.

6. The grease according to claim 5, wherein the weight ratio of the first diurea thickener to the second diurea thickener is from 1: 1 to 19: 1.

7. The grease according to claim 6, wherein the molar ratio of aliphatic amino fat is from 9: 1 to 1: 9 and the mole ratio of alpha-amino fat to the amino-alkoyl-alkyl in the second diurea thickener is 9: 1 to 1: 9.

8. The grease according to claim 7, wherein the ratio of the mole of the amino-aliphatic fat to the amino-alkylphenyl in the first diurea separator is from 2: 3 to 3: 2 and the amino alkylphenyl is from 1 carbon atom to 4. carbon atoms of amino alkylphenyl.

9. The grease according to claim 8, wherein the mole ratio of the amino-aliphatic fat to the amino-cycloalkyl in the second diurea thickener is from 2: 3 to 3: 2 and the amino-cycloalkyl comprises amino-cyclohexyl.

10. The grease according to claim 9, wherein the aliphatic amino fat in the first diurea thickener and in the second diurea thickness comprises at least one member selected from the group consisting of tallow amino, hydrogenated tallow amino and amino oleiloo.

11. The grease according to claim 10, wherein there are mole concentrations completely equal to those of the amino alkylphenyl, aliphatic amino fat and toluene diisocyanate in the first reaction product of diurea thickener and completely equal mole concentrations of amino cyclohexyl , aliphatic amino fat and toluene diisocyanate in the second diurea thickener reaction product.

12. The method for preparing a fibrous diurea fat comprising a base oil and a first diurea or fribrous thickener and a second diurea thickener comprising the steps of: (1) reacting a base oil dispersion of toluene diisocyanate, amino cycloalkyl and aliphatic amino fat until all the isocyanate groups have reacted completely to form a diurea thickener (2) dispersing the aliphatic amino and amino cycloalkyl fat in the reaction product of step (1); (3) then add toluene diisocyanate to the dispersion of step (2) by reacting them until all the isocyanate groups have reacted completely to form a fibrous diurea thickener in situ.

13. The process according to claim 2, wherein the weight ratio of the diurea thickener formed in the in situ step (1) of the fibrous diurea thickener is from 1: 1 to 1: 19.

14. The process according to claim 13, wherein there are mole concentrations completely equal to those of toluene diisocyanate, amino cyclocaluyl and aliphatic amino fat in step (1) and completely equal mole concentrations of toluene diisocyanate, amino alkylphenyl and aliphatic amino fat in steps (2) and (3).