10081-67-1

Usage

Uses

Used in Rubber Industry:
Bis[4-(2-phenyl-2-propyl)phenyl]amine is used as an antioxidant in various types of rubber, including NR, IIR, SBR, NBR, BR, and CR, for its efficient protection against thermal aging. It is especially effective in protecting CR from thermal aging and can be used in insulative and protective rubber sheeting for color wires and cables, as well as common color rubber products, to reduce production costs.
Used in Plastic Industry:
Bis[4-(2-phenyl-2-propyl)phenyl]amine is used as a thermal stabilizer in a wide variety of applications, including polyolefins, styrenics, polyols, hot melt adhesives, lubricants, and polyamides. It provides excellent performance at processing temperatures and has strong synergy with other types of antioxidants such as phenolics and phosphites.
Used in Polyethylene, Polypropylene, and Polyvinyl Chloride:
Bis[4-(2-phenyl-2-propyl)phenyl]amine is used as an antioxidant in color masterbatch for polyethylene, polypropylene, and polyvinyl chloride.
Used in Polyurethane Foam, Rubber Wire, Cable, Food Package, and Adhesive:
Bis[4-(2-phenyl-2-propyl)phenyl]amine is used as an antioxidant in polyurethane foam, rubber wire, cable, food package, and adhesive, especially in neoprene colorful cable's jacket for its excellent resistance to heat, light, and aging.
Used in Polyether and Lubricating Oil:
Bis[4-(2-phenyl-2-propyl)phenyl]amine is used as a light-resistant and anti-aging antioxidant in polyether and as an antioxidant for lubricating oil.
Used in Neoprene Acrylate Rubber and Polyether Polyalcohol:
Bis[4-(2-phenyl-2-propyl)phenyl]amine is used for its resistance to aging caused by high temperature and light in neoprene acrylate rubber and polyether polyalcohol.
Used with Sulfur-Contained Antioxidant:
When used together with sulfur-contained antioxidant, Bis[4-(2-phenyl-2-propyl)phenyl]amine has an operational effect.

Flammability and Explosibility

Nonflammable

Synthesis

a, first raw material diphenylamine 50.0g into a reaction vessel equipped with a stirrer, reflux condenser, heated to diphenylamine added to melt;After completely melted, a mixed catalyst prepared from 1.5 g of magnesium chloride and 1.5 g of anhydrous stannous chloride was added, and heating and stirring were continued for mixing; b. After step a is mixed uniformly, 80.5 g of α-methylstyrene is added dropwise, and the dropwise addition time is 0.5 h. After the dropwise addition is completed, the reaction temperature is controlled to be 130-140° C., and the reaction is completed at this temperature for 1 h. The reaction is completed. ; c, after the end of the reaction, the resulting reaction solution was cooled, then add 60 of petroleum ether 140g and methanol 5g mixed solvent, dropped to 25 ± 2 °C cooling crystallization; d, after the end of crystallization, followed by filtration, petroleum ether and water washing, and then dried at 45 °C for 14 hours, dried to obtain the antioxidant 4,4 '- bis (α, α- dimethyl benzyl) diphenylamine . The product obtained in this example was white crystal with a yield of 85% and a purity of 98.24%

InChI:InChI=1/C30H31N/c1-29(2,23-11-7-5-8-12-23)25-15-19-27(20-16-25)31-28-21-17-26(18-22-28)30(3,4)24-13-9-6-10-14-24/h5-22,31H,1-4H3

Synthetic route

diphenylamine (122-39-4) + isopropenylbenzene (98-83-9) → bis[4-(2-phenyl-2-propyl)phenyl]amine (10081-67-1) + 4-(α,α-dimethylbenzyl)diphenylamine

Conditions	Yield
With Al-MSU-G at 90℃; for 6h; Product distribution; Further Variations:; Reagents; Temperatures; reaction time;	A 97.2% B n/a
With acid-treated clay catalyst Engelhard F-24 In o-xylene at 89.9℃; for 12h; Product distribution; Irradiation; other alkylating agent, var. catalyst, var. temp, var. solvent, var. time, also without sonication, and in air, also reused catalysts;

diphenylamine (122-39-4) + isopropenylbenzene (98-83-9) → bis[4-(2-phenyl-2-propyl)phenyl]amine (10081-67-1)

Conditions	Yield
With zinc(II) chloride In ethanol; 1,2-dichloro-ethane at 185℃; Solvent; Temperature; Reagent/catalyst; Flow reactor; regioselective reaction;	89%
Stage #1: diphenylamine With tin(ll) chloride; magnesium chloride Heating; Stage #2: isopropenylbenzene at 130 - 140℃; for 1.5h; Reagent/catalyst; Temperature;	85%
With 2-methylbenzene-1,4-diol In toluene at 60 - 125℃; Inert atmosphere;	38.5 g

2,4-dimethyl-1-heptene (19549-87-2, 127388-21-0, 127388-22-1) + N-phenyl-1-naphthylamine (90-30-2) + diphenylamine (122-39-4) + isopropenylbenzene (98-83-9) → 4-nonyldiphenylamine + 4-α-methylstyryl-4'-nonyldiphenylamine + 4,4'-dinonyldiphenylamine + bis[4-(2-phenyl-2-propyl)phenyl]amine (10081-67-1) + 4-(α,α-dimethylbenzyl)diphenylamine

Conditions	Yield
Stage #1: N-phenyl-1-naphthylamine; diphenylamine; Fulcat 22B at 220℃; under 15.0015 Torr; for 1h; Stage #2: 2,4-dimethyl-1-heptene at 130 - 220℃; for 6.5h; Stage #3: isopropenylbenzene at 130 - 134℃; for 3h; Product distribution / selectivity;

...Expand

2,4-dimethyl-1-heptene (19549-87-2, 127388-21-0, 127388-22-1) + diphenylamine (122-39-4) + isopropenylbenzene (98-83-9) → 4-nonyldiphenylamine + 4-α-methylstyryl-4'-nonyldiphenylamine + 4,4'-dinonyldiphenylamine + bis[4-(2-phenyl-2-propyl)phenyl]amine (10081-67-1) + 4-(α,α-dimethylbenzyl)diphenylamine

Conditions	Yield
Stage #1: 2,4-dimethyl-1-heptene; diphenylamine; Fulcat 22B at 80 - 220℃; under 15.0015 Torr; for 5.5 - 7.5h; Stage #2: isopropenylbenzene at 130 - 134℃; for 3h; Product distribution / selectivity;

bis[4-(2-phenyl-2-propyl)phenyl]amine (10081-67-1) + ethyl 10-bromoanthracene-9-carboxylate → ethyl 10-[bis[4-(1-methyl-1-phenylethyl)phenyl]amino]anthracene-9-carboxylate

Conditions	Yield
With tri-tert-butyl phosphine; palladium diacetate; sodium t-butanolate In toluene at 90℃; for 3h; Inert atmosphere;	90%

9,10-Dibromoanthracene (523-27-3) + bis[4-(2-phenyl-2-propyl)phenyl]amine (10081-67-1) → N9,N9,N10,N10-tetrakis(4-(2-phenylpropan-2-yl)phenyl)anthracene-9,10-diamine

Conditions	Yield
With tri-tert-butyl phosphine; palladium diacetate; potassium carbonate In toluene for 10h; Reflux;	80%

ethyl 2-bromoisobutyrate (600-00-0) + bis[4-(2-phenyl-2-propyl)phenyl]amine (10081-67-1) → 3,3-dimethyl-5-(2-phenylpropan-2-yl)-1-(4-(2-phenylpropan-2-yl)phenyl)indolin-2-one

Conditions	Yield
With [2,2]bipyridinyl; copper diacetate; potassium carbonate In acetonitrile at 120℃; for 12h; Schlenk technique; Inert atmosphere;	80%

2-bromospiro[fluorenyl-9,8'-indolo[3,2,1-de]acridine] + bis[4-(2-phenyl-2-propyl)phenyl]amine (10081-67-1) → C61H48N2

Conditions	Yield
With bis(tri-t-butylphosphine)palladium(0); sodium t-butanolate In 5,5-dimethyl-1,3-cyclohexadiene for 3h; Inert atmosphere; Heating;	70%

1-bromo-2,3-dichlorobenzene (56961-77-4) + bis[4-(2-phenyl-2-propyl)phenyl]amine (10081-67-1) → C66H63ClN2

Conditions	Yield
With tris-(dibenzylideneacetone)dipalladium(0); sodium t-butanolate at 130℃; Inert atmosphere;	66.2%

bis[4-(2-phenyl-2-propyl)phenyl]amine (10081-67-1) + 4-Fluoronitrobenzene (350-46-9) → bis[4-(2-phenyl-2-isopropyl)phenyl]-4-nitrophenylamine (1243278-12-7)

Conditions	Yield
With sodium hydride In dimethyl sulfoxide at 120℃; for 24h;	63%
With sodium hydride In dimethyl sulfoxide at 120℃; for 48h;	50%
With sodium hydride In dimethyl sulfoxide at 120℃; for 48h;	50%

1.4-dibromobenzene (106-37-6) + bis[4-(2-phenyl-2-propyl)phenyl]amine (10081-67-1) → N-(4-bromophenyl)-4-(2-phenylpropan-2-yl)-N-(4-(2-phenylpropan-2-yl)phenyl)benzeneamine (1310961-36-4)

Conditions	Yield
With 1,1'-bis-(diphenylphosphino)ferrocene; palladium diacetate; sodium t-butanolate In toluene at 120℃; for 7h; Inert atmosphere;	62%

iodobenzene (591-50-4) + bis[4-(2-phenyl-2-propyl)phenyl]amine (10081-67-1) → C36H35N (259218-10-5)

Conditions	Yield
With 1,1'-bis-(diphenylphosphino)ferrocene; bis(dibenzylideneacetone)-palladium(0); sodium t-butanolate In toluene for 8h; Buchwald-Hartwig reaction; Reflux; Inert atmosphere;	55%
With 1,1'-bis-(diphenylphosphino)ferrocene; bis(dibenzylideneacetone)-palladium(0); sodium t-butanolate In toluene for 8h; Inert atmosphere; Reflux;	55%

4,4,4-trifluorobutyric acid (406-93-9) + bis[4-(2-phenyl-2-propyl)phenyl]amine (10081-67-1) → 4-(2-phenylpropan-2-yl)-N-(4-(2-phenylpropan-2-yl)phenyl)-N-(3,3,3-trifluoropropyl)aniline

Conditions	Yield
With di-tert-butyl peroxide; copper(II) hexafluoroacetylacetonate; 9-mesitylacridine at 35℃; for 24h; Inert atmosphere; Irradiation;	51%

bis[4-(2-phenyl-2-propyl)phenyl]amine (10081-67-1) + 7-bromo-10-hexyl-10H-phenothiazine-3-carbaldehyde (312924-97-3) → 7-(bis(4-(2-phenylpropan-2-yl)phenyl)amino)-10-hexyl-10H-phenothiazine-3-carbaldehyde (1618093-71-2)

Conditions	Yield
With tri-tert-butyl phosphine; potassium tert-butylate; palladium diacetate In toluene Reflux; Inert atmosphere;	45%

carbon tetrabromide (558-13-4) + bis[4-(2-phenyl-2-propyl)phenyl]amine (10081-67-1) → 2,7-bis(1-methyl-1-phenylethyl)-N,N-bis[4-(1-methyl-1-phenylethyl)phenyl]acridin-9-amine

Conditions	Yield
In toluene at 20℃; Rate constant; Irradiation; photoinduced reaction of diarylamines with CBr4; spectral study; intermediates formation; spectral and kinetic properties of intermediates;
In toluene at 20℃; Irradiation;
In hexane Irradiation;

bis[4-(2-phenyl-2-propyl)phenyl]amine (10081-67-1) → BBTPA (1243278-16-1)

Conditions	Yield
Multi-step reaction with 3 steps 1: sodium hydride / dimethyl sulfoxide / 48 h / 120 °C 2: palladium on activated charcoal; hydrazine hydrate / 12 h / Reflux; Inert atmosphere 3: 1,1'-bis-(diphenylphosphino)ferrocene; bis(dibenzylideneacetone)-palladium(0); sodium t-butanolate / toluene / 10 h / Reflux; Inert atmosphere View Scheme

bis[4-(2-phenyl-2-propyl)phenyl]amine (10081-67-1) → bis[4-(2-phenyl-2-isopropyl)phenyl]-4-aminophenylamine (1243278-14-9)

Conditions	Yield
Multi-step reaction with 2 steps 1: sodium hydride / dimethyl sulfoxide / 48 h / 120 °C 2: palladium on activated charcoal; hydrazine hydrate / 12 h / Reflux; Inert atmosphere View Scheme
Multi-step reaction with 2 steps 1: sodium hydride / dimethyl sulfoxide / 48 h / 120 °C 2: hydrazine hydrate / palladium 10% on activated carbon / ethanol / 90 °C View Scheme
Multi-step reaction with 2 steps 1: sodium hydride / dimethyl sulfoxide / 24 h / 120 °C 2: palladium on activated charcoal; hydrazine hydrate / ethanol / 12 h / Reflux View Scheme

bis[4-(2-phenyl-2-propyl)phenyl]amine (10081-67-1) → N,N-bis(4-nitrophenyl)-N',N'-bis[4-(2-phenyl-2-isopropyl)phenyl]-1,4-phenylenediamine (1246049-04-6)

Conditions	Yield
Multi-step reaction with 3 steps 1: sodium hydride / dimethyl sulfoxide / 48 h / 120 °C 2: hydrazine hydrate / palladium 10% on activated carbon / ethanol / 90 °C 3: cesium fluoride / dimethyl sulfoxide / 24 h / 120 °C View Scheme
Multi-step reaction with 3 steps 1: sodium hydride / dimethyl sulfoxide / 24 h / 120 °C 2: palladium on activated charcoal; hydrazine hydrate / ethanol / 12 h / Reflux 3: cesium fluoride / dimethyl sulfoxide / 24 h / 120 °C View Scheme

bis[4-(2-phenyl-2-propyl)phenyl]amine (10081-67-1) → N,N-bis(4-aminophenyl)-N',N'-bis[4-(2-phenyl-2-isopropyl)phenyl]-1,4-phenylenediamine (1246048-80-5)

Conditions	Yield
Multi-step reaction with 4 steps 1: sodium hydride / dimethyl sulfoxide / 48 h / 120 °C 2: hydrazine hydrate / palladium 10% on activated carbon / ethanol / 90 °C 3: cesium fluoride / dimethyl sulfoxide / 24 h / 120 °C 4: hydrazine / palladium 10% on activated carbon / ethanol / 90 °C View Scheme
Multi-step reaction with 4 steps 1: sodium hydride / dimethyl sulfoxide / 24 h / 120 °C 2: palladium on activated charcoal; hydrazine hydrate / ethanol / 12 h / Reflux 3: cesium fluoride / dimethyl sulfoxide / 24 h / 120 °C 4: palladium on activated charcoal; hydrazine hydrate / ethanol / 12.5 h / 90 °C / Reflux View Scheme

1.4-dibromobenzene (106-37-6) + bis[4-(2-phenyl-2-propyl)phenyl]amine (10081-67-1) → C80H79N3

Conditions	Yield
Multi-step reaction with 2 steps 1: 1,1'-bis-(diphenylphosphino)ferrocene; palladium diacetate; sodium t-butanolate / toluene / 7 h / 120 °C / Inert atmosphere 2: 1,1'-bis-(diphenylphosphino)ferrocene; tri-tert-butyl phosphine; palladium diacetate; sodium t-butanolate / toluene / 5 h / 110 °C / Inert atmosphere View Scheme

bis[4-(2-phenyl-2-propyl)phenyl]amine (10081-67-1) → C39H33N3O2S (1350319-91-3)

Conditions	Yield
Multi-step reaction with 2 steps 1: sodium t-butanolate; tri-tert-butyl phosphine; palladium diacetate / toluene; icosane / 2 h 2: acetonitrile / 4 h / 20 °C View Scheme

bis[4-(2-phenyl-2-propyl)phenyl]amine (10081-67-1) → C45H43N3O4S (1350319-92-4)

Conditions	Yield
Multi-step reaction with 3 steps 1: sodium t-butanolate; tri-tert-butyl phosphine; palladium diacetate / toluene; icosane / 2 h 2: acetonitrile / 4 h / 20 °C 3: potassium carbonate / acetonitrile / 2 h / 80 °C View Scheme

bis[4-(2-phenyl-2-propyl)phenyl]amine (10081-67-1) → C41H35N3O4S (1350319-94-6)

Conditions	Yield
Multi-step reaction with 4 steps 1: sodium t-butanolate; tri-tert-butyl phosphine; palladium diacetate / toluene; icosane / 2 h 2: acetonitrile / 4 h / 20 °C 3: potassium carbonate / acetonitrile / 2 h / 80 °C 4: toluene-4-sulfonic acid / toluene / 4 h / 80 °C View Scheme

2-bromothiophene (1003-09-4) + bis[4-(2-phenyl-2-propyl)phenyl]amine (10081-67-1) → C34H33NS (1350319-90-2)

Conditions	Yield
With tri-tert-butyl phosphine; palladium diacetate; sodium t-butanolate In icosane; toluene for 2h;	43.3 g

bis[4-(2-phenyl-2-propyl)phenyl]amine (10081-67-1) + 7-bromo-10-hexyl-10H-phenothiazine-3-carbaldehyde (312924-97-3) → 3-(7-(bis(4-(2-phenylpropan-2-yl)phenyl)amino)-10-hexyl-10H-phenothiazin-3-yl)-2-cyanoacrylic acid (1618093-69-8)

Conditions	Yield
Multi-step reaction with 2 steps 1: palladium diacetate; tri-tert-butyl phosphine; potassium tert-butylate / toluene / Reflux; Inert atmosphere 2: piperidine / acetonitrile; chloroform / 10 h / Reflux View Scheme

(S)-epichlorohydrin (67843-74-7) + bis[4-(2-phenyl-2-propyl)phenyl]amine (10081-67-1) → C33H36ClNO

Conditions	Yield
With acetic acid at 60 - 65℃; for 48h;

bis[4-(2-phenyl-2-propyl)phenyl]amine (10081-67-1) → (R)-3-(4,4'-bis(α,α-dimethylbenzyl))diphenylaminopropene oxide

Conditions	Yield
Multi-step reaction with 2 steps 1: acetic acid / 48 h / 60 - 65 °C 2: sodium hydroxide / diethyl ether / 2 h / Reflux View Scheme

bis[4-(2-phenyl-2-propyl)phenyl]amine (10081-67-1) → (S)-3-(4,4'-bis(α,α-dimethylbenzyl))diphenylaminopropene oxide

Conditions	Yield
Multi-step reaction with 2 steps 1: acetic acid / 48 h / 60 - 65 °C 2: sodium hydroxide / diethyl ether / 2 h / Reflux View Scheme

(R)-(-)-epichlorohydrin (51594-55-9) + bis[4-(2-phenyl-2-propyl)phenyl]amine (10081-67-1) → C33H36ClNO

Conditions	Yield
With acetic acid at 60 - 65℃; for 48h;

Upstream product

• 122-39-4 diphenylamine 
• 98-83-9 isopropenylbenzene 
• 19549-87-2 2,4-dimethyl-1-heptene 
• 90-30-2 N-phenyl-1-naphthylamine 

Downstream Products

• 259218-10-5 C₃₆H₃₅N 
• 1243278-16-1 BBTPA 
• 1243278-14-9 bis[4-(2-phenyl-2-isopropyl)phenyl]-4-aminophenylamine 
• 1243278-12-7 bis[4-(2-phenyl-2-isopropyl)phenyl]-4-nitrophenylamine 
• 1246049-04-6 N,N-bis(4-nitrophenyl)-N',N'-bis[4-(2-phenyl-2-isopropyl)phenyl]-1,4-phenylenediamine 
• 1246048-80-5 N,N-bis(4-aminophenyl)-N',N'-bis[4-(2-phenyl-2-isopropyl)phenyl]-1,4-phenylenediamine 
• 1310961-36-4 N-(4-bromophenyl)-4-(2-phenylpropan-2-yl)-N-(4-(2-phenylpropan-2-yl)phenyl)benzeneamine 
• 1350319-91-3 C₃₉H₃₃N₃O₂S 
• 1350319-92-4 C₄₅H₄₃N₃O₄S 
• 1350319-94-6 C₄₁H₃₅N₃O₄S 
• 1350319-90-2 C₃₄H₃₃NS 
• 1618093-71-2 7-(bis(4-(2-phenylpropan-2-yl)phenyl)amino)-10-hexyl-10H-phenothiazine-3-carbaldehyde 
• 1618093-69-8 3-(7-(bis(4-(2-phenylpropan-2-yl)phenyl)amino)-10-hexyl-10H-phenothiazin-3-yl)-2-cyanoacrylic acid 

Relevant academic research and scientific papers

Mesostructured aluminosilicate alkylation catalysts for the production of aromatic amine antioxidants

The conversion of diphenylamine (DPA) and α-methylstyrene (AMS) to the antioxidants mono- and dicumenyldiphenylamine was carried out over mesostructured aluminosilicate catalysts with hexagonal (2% Al-MCM-41), wormhole (2% Al-HMS), and lamellar/vesicular (2% Al-MSU-G) framework structures. A commercial acid-treated clay catalyst, Engelhard F-20, was included for comparison perposes. The yields of the desired antioxidant, namely dicumenyldiphenylamine (DCDPA), increased in the order F-20 (～57%)3PW12O40·xH2O (PW 12) supported on mesostructured wormhole HMS and lamellar/vesicular MSU-G silica, also was examined as a catalyst for DCDPA production. The supported catalyst systems, however, afforded lower maximum yields of DCDPA (～73-80%) in comparison to the mesostructured aluminosilicate catalysts. The exceptionally high yields of alkylated products obtained with the mesoporous aluminosilicate catalysts in comparison to the F-20 clay and the supported PW12 catalysts are attributable in part to intermediate acid strengths that minimize completing dimerization reactions of the AMS alkylating agent. Also, the pore structures of the mesostructured catalysts facilitate access to active sites on the framework walls and provide more efficient transport of reagents to framework reaction centers. Also, the regular mesoporosity of the aluminosilicate catalysts makes these structures less prone to pore plugging and to the masking of acidity through the adsorption of the high molecular weight reaction products.

Alkylation of diphenylamine with α-methylstyrene and diisobutylene using acid-treated clay catalysts

Alkylation of diphenylamine was carried out with α-methylstyrene and diisobutylene using acid-treated clay catalyst Engelhard F-24 to produce mono- and dialkylated diphenylamines. Dialkylated diphenylamines are industrially useful as antioxidants and heat stabilizers. Mono and dialkylated diphenylamines were separated in pure form from the reaction mixture and characterized by FTIR and 1H NMR. Reaction conditions for obtaining high selectivity of each of the alkylated products were studied. A comparative study of the reaction rates, with various other grades of acid-treated clay catalysts, was done for the reaction between diphenylamine and α-methylstyrene. The reaction between diphenylamine and α-methylstyrene was also studied in a continuous mode of operation in a fixed bed reactor. Deactivation of the catalyst occurred during the course of these reactions and reuse of the catalyst posed problems; alternative schemes were considered to regenerate the deactivated catalyst. The basic reasons for the deactivation of the catalyst were investigated in the case of reaction between diphenylamine and α-methylstyrene. The fresh and used catalysts were characterized using various spectroscopic and other techniques such as X-ray diffraction, X-ray photoelectron spectroscopy, UV-visible and nuclear magnetic resonance spectroscopy, surface area (BET) and surface acidity (TPD), pore size distribution, and pore volume. These studies indicated that the deactivation of the catalyst was due to irreversible adsorption on the surface, loss of microporous structure and loss of surface acidity. The adsorbed species appeared to be diphenylamine and/or alkylated product(s), coordinated to the surface oxygen of the catalyst through nitrogen, forming a nitro kind of species.

Zinc-Catalyzed Alkylation of Aromatic Amines in Continuous Flow

A practical approach to the synthesis of antioxidant 4,4′-dicumyldiphenylamine (DCDPA) and its derivatives by Friedel-Crafts alkylation of aromatic amines was developed under continuous flow conditions. Because of the enhanced mass and heat transfer features of the microreactor, the reaction time was significantly reduced in contrast to a batch mode. The reaction was carried out using a 1:6 v/v ethanol/Cl(CH2)2Cl cosolvent system with ZnCl2 as the catalyst to achieve satisfactory yields. This is an effective method for the synthesis of DCDPA and its derivatives with excellent para selectivity that has the merits of shorter reaction time, easy operation, and straightforward scale-up.

Anti-oxidant 4, 4' - double (α, α - dimethyl benzyl) diphenylamine preparation method (by machine translation)

The invention discloses a method for antioxidant 4, 4' - double (α, α - dimethyl benzyl) diphenylamine preparation method. First of all the raw materials diphenylamine added to a reaction vessel, heating to melt; melting compound catalyst added after continued heating and stirring; after stir dropwise α - methyl styrene, after dropping the heating reaction; after the reaction, the temperature of the resulting reaction solution, then adding petroleum ether and methanol mixed solvent, cooling to room temperature to crystallize; filtering the final turn, petroleum ether washing, washing and drying, drying to obtain the anti-oxidant 4, 4' - double (α, α - dimethyl benzyl) diphenylamine. This invention adopts the disposable synthetic antioxidant, only need to filter after the reaction, washing can obtain high-quality antioxidant product, without the need of acidified, alkali neutralization, washing and other complex post-treatment process, not three wastes to produce, also saves the many complex steps. Therefore, the invention has obvious economic and social benefits. (by machine translation)

Preparation method of diphenylamine rubber aging inhibitor

The invention relates to a preparation method of a diphenylamine rubber aging inhibitor. An immobilized catalyst is prepared from a Lewis acidic ionic liquid by supporting the Lewis acidic ionic liquid on the surface of a molecular sieve and is applied to an alkylation reaction of diphenylamine. The method can have remarkable progress in the aspects of yield, purity, service life of the catalyst and other aspects as compared with the prior art.

ALKYLATED PANA AND DPA COMPOSITIONS

The invention relates to a composition comprising a mixture of alkylated N-α-naphthyl-N-phenylamine (PANA) and alkylated diphenylamine (DPA), the product obtainable by alkylat-ing PANA or a mixture of PANA and DPA with alkenes and the process for alkylating PANA or a mixture of PANA and DPA with alkenes. The compositions according to the present in-vention have an outstanding anti-oxidative action, which can be demonstrated by established test methods.