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method of producing phenylenediamine antioxidant

Method of producing phenylenediamine antioxidant for emulsion-polymerised rubber Method of producing phenylenediamine antioxidant for emulsion-polymerised rubber // 2373184. FIELD: chemistry. SUBSTANCE: method involves reacting derivative o

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Method of producing phenylenediamine antioxidant for emulsion-polymerised rubber

Method of producing phenylenediamine antioxidant for emulsion-polymerised rubber // 2373184. FIELD: chemistry. SUBSTANCE: method involves reacting derivative of maleic anhydride with n-aminodiphenylamine while heating to temperature not above 90°C.

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Phenylenediamine derivative, production method thereof and antioxidant for rubber using it ...

A phenylenediamine derivative represented by following formula (I) or (II): 1 wherein R 1 and R 2 each represents a hydrogen atom, a lower alkyl group, or a lower alkoxy group; R 3 represents a hydrogen atom or a methyl group, R 4 represents a methyl group or an ethyl group; and n and m each is 1, 2, or 3; 2. wherein R 1 and R 2 each represents a hydrogen atom, a lower alkyl group, a lower ...

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Phenylenediamine derivative, production method thereof and antioxidant for rubber using it ...

A phenylenediamine derivative represented by following formula (I) or (II): ##STR1## wherein R 1 and R 2 each represents a hydrogen atom, a lower alkyl group, or a lower alkoxy gro Phenylenediamine derivative, production method thereof and antioxidant for rubber using it as effective constituent - NOK Corporation

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Method of producing n-phenylenediamine

FIELD: chemistry. SUBSTANCE: invention relates to an improved method of producing n-phenylenediamine, involving synthesis of terephthalic acid diamine, Hofmann rearrangement through successive treatment of diamine, first with aqueous sodium or potassium hydroxide solution and then with aqueous sodium or calcium hypochlorite solution, and extraction of n-phenylenediamine.

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amine antioxidant for rubber and method for production | Widely Used Hot Sale Rubber ...

Method of producing phenylenediamine antioxidant for. The invention relates to the field of production of rubber antioxidants emulsion polymerization and commodity latexes, particularly to obtain antioxidants phenylenediamine type. A method of obtaining amine antioxidant for various types of synthetic rubbers N,N'-diphenylethylenediamine-1,4 ...

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Method for measuring antioxidant activity and its application to monitoring the antioxidant ...

A novel method for measuring the antioxidant activity using N, N-dimethyl-p-phenylenediamine (DMPD) was developed. The radical cation of this compound gives a stable colored solution and a linear inhibition of color formation can be observed in the presence of 0. 2-11 microg of TROLOX. The experimen …

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Amine antioxidant for rubber and method for production thereof

SUBSTANCE: invention relates to an improved method of producing N-2-ethylhexyl-N'-phenyl n-phenylenediamine, which can be used as an antioxidant for polymers and separation of commercial 2-ethylhexanoic acid from wastes from production of N-2-ethylhexyl-N'-phenyl n-phenylenediamine, which is achieved through alkylation of n-aminodiphenylamine ...

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METHOD FOR PREPARING P-PHENYLENEDIAMINE ANTIOXIDANT USING A SULFUR-CONTAINING PALLADIUM ...

Provided are a sulfur-containing Palladium (Pd)/carbon catalyst, a preparation method therefor, and a method of using the catalyst to prepare p-Phenylenediamine (PPD) rubber antioxidant. The method for preparing the sulfur-containing Pd/carbon catalyst comprises: loading Pd on an active carbon to obtain a Pd/carbon catalyst; then, preparing a ...

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Antioxidants and antioxidant methods: an updated overview | SpringerLink

Antioxidants had a growing interest owing to their protective roles in food and pharmaceutical products against oxidative deterioration and in the body and against oxidative stress-mediated pathological processes. Screening of antioxidant properties of plants and plant-derived compounds requires appropriate methods, which address the mechanism of antioxidant activity and focus on the kinetics ...

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(PDF) Methods for determination of antioxidant capacity: A review

Received on 26 May, 2014; received in revised form, 10 August, 2014; accepted, 13 October, 2014; published 01 February, 2015. METHODS FOR DETERMINATION OF ANTIOXIDANT CAPACITY: A REVIEW ...

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Phenylenediamine derivative, production method thereof and ...

Phenylenediamine derivative, production method thereof and antioxidant for rubber using it as effective constituent 6329551 - 5442087 - USPTO Application Apr 07, 2000 - Publication Dec 11, 2001

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Phenylenediamine derivative, production method thereof and ...

A phenylenediamine derivative represented by following formula (I) or (II): 1 . Justia Patents Additional Amino Nitrogen Containing US Patent Application for Phenylenediamine derivative, production method thereof and antioxidant for rubber using it as effective constituent Patent Application (Application #20020016508)

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N,N-Dimethyl-p-phenylenediamine dihydrochloride-based ...

N,N-Dimethyl-p-phenylenediamine dihydrochloride (DMPD) is a compound that is normally used to measure the antioxidant potential. In the presence of Fe(3+), it gets converted to DMPD(∙+) radical, which is scavenged by antioxidant molecules present in test samples. In plasma, due to the presence of ir …

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EP2759341B1 - Method for preparing p-phenylenediamine ...

EP2759341B1 - Method for preparing p-phenylenediamine antioxidant using a sulfur-containing palladium/carbon catalyst - Google Patents

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Phenylenediamine derivative, production method thereof and ...

A phenylenediamine derivative represented by following formula (I) or (II): wherein R1 and R2 each represents a hydrogen atom, a lower alkyl group, or a lower alkoxy group; R3 represents a hydrogen atom or a methyl group; R4 represents a methyl group or an ethyl group; and n and m each is 1, 2, or 3; wherein R1 and R2 each represents a hydrogen atom, a lower alkyl group, a lower alkoxy group ...

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Comparative study of p-phenylenediamine antioxidant ...

Structures of six p-phenylenediamine (PPD) antioxidants were optimized and their NMR shifts were evaluated by B3LYP calculations. The dependences of experimental values of Antioxidant Effectiveness (AEX) and Molar Antioxidant Effectiveness ...

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Analytical Methods Used in Determining Antioxidant ...

The method was applied to the evaluation of the antioxidant activity of certain pure compounds, soluble in water or ethanol, certain antioxidants, and some samples of tea, wine and other beverages. The good correlation of measurements (R 2 = 0.9993), expressed as trolox equivalent, was obtained by the amperometric method proposed and the ...

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Antioxidants and antioxidant methods: an updated overview ...

Antioxidants had a growing interest owing to their protective roles in food and pharmaceutical products against oxidative deterioration and in the body and against oxidative stress-mediated pathological processes. Screening of antioxidant properties of plants and plant-derived compounds requires appropriate methods, which address the mechanism of antioxidant activity and focus on the kinetics ...

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(PDF) Methods for determination of antioxidant capacity: A ...

Received on 26 May, 2014; received in revised form, 10 August, 2014; accepted, 13 October, 2014; published 01 February, 2015. METHODS FOR DETERMINATION OF ANTIOXIDANT CAPACITY: A REVIEW ...

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METHOD OF PREPARING ANTIOXIDANT FOR EMULSION ...

FIELD: rubber-processing industry. SUBSTANCE: present invention describes preparation of antioxidant for emulsion polymerization rubbers. Method comprises reacting modified carboxylic acids with amines on heating. Modified carboxylic acids include maleinized tall oil comprising resin and fatty acids in 1-2:1 ratio, respectively with weight fraction of bonded maleic anhydride from 10 to 80%.

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Phenylenediamine derivative, production method thereof and ...

A phenylenediamine derivative represented by following formula (I) or (II): 1 . Justia Patents Additional Amino Nitrogen Containing US Patent Application for Phenylenediamine derivative, production method thereof and antioxidant for rubber using it as effective constituent Patent Application (Application #20020016508)

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Determination of p-phenylenediamine and related ...

Determination of p-phenylenediamine and related antioxidants in rubber boots by high performance liquid chromatography. Development of an analytical method for N-(1-methylheptyl)-N '-phenyl-p-phenylenediamine

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antioxidant n-phenyl-1-naphthylamine( a pan) for producing ...

Application of antioxidant functionalized silicas in natural rubber. Antioxidant functionalized silica was designed and prepared from N-phenyl-1, 4-phenylenediamine(PPDA), (3-Glycidyloxypropyl)trimethoxysilane and silica to improve the dispersion of silica in the . Get Price

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Determination of p-Phenylenediamine and Related ...

Althouh p-phenylenediamine (PPD) and related compounds have been used as antioxidants in rubber products, they commonly display sensitizing properties …

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[PDF] Determination of p-Phenylenediamine and Related ...

Although p-phenylenediamine (PPD) and related compounds have been used as antioxidants in rubber products, they commonly display sensitizing properties and have been associated with contact dermatitis. N-Substitution of PPD influences the sensitization potential, so it is important to examine which PPD antioxidants are used in commercially available rubber products, to prevent the occurrence ...

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Analytical Methods Used in Determining Antioxidant ...

The method was applied to the evaluation of the antioxidant activity of certain pure compounds, soluble in water or ethanol, certain antioxidants, and some samples of tea, wine and other beverages. The good correlation of measurements (R 2 = 0.9993), expressed as trolox equivalent, was obtained by the amperometric method proposed and the ...

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Comparative study of p-phenylenediamine antioxidant ...

Structures of six p-phenylenediamine (PPD) antioxidants were optimized and their NMR shifts were evaluated by B3LYP calculations. The dependences of experimental values of Antioxidant Effectiveness (AEX) and Molar Antioxidant Effectiveness ...

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Antioxidants and antioxidant methods: an updated overview ...

Antioxidants had a growing interest owing to their protective roles in food and pharmaceutical products against oxidative deterioration and in the body and against oxidative stress-mediated pathological processes. Screening of antioxidant properties of plants and plant-derived compounds requires appropriate methods, which address the mechanism of antioxidant activity and focus on the kinetics ...

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diaryl secondary amine antioxidants,physical properties ...

3) Method for prepn. and purification of phosphine oxide 4) Method for recovering organic alkoxy silicane from poly organic siloxane 5) Method for producing metal-ligand compositions 6) Luogelie ketone hydrochloride and its use 7) Pyrazole derivative, and herbicide produced therefrom 8) Prepn. method for chloral betaine and its application

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p-Phenylenediamine - Wikipedia

p-Phenylenediamine (PPD) is an organic compound with the formula C6H4(NH2)2. This derivative of aniline is a white solid, but samples can darken due to air oxidation.[1] It is mainly used as a component of engineering polymers and composites like kevlar. It is also an ingredient in hair dyes and is occasionally used as a substitute for henna.

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