golden supplier best selling antioxidants h powder for rubber cas:74-31-7

    Product Description Antioxidant H Executive standard: Q/YTH 001-2011 English alias: N, N-diphenyl-p-phenylenediamine English abbreviation: DPPD CAS RN: 74-31-7 1. Physical and chemical properties: 1.1 Molecular formula: C18H16N2 1.2 Molecular weight: 260.34 1.3 Structure formula:   1.4 Specific gravity: 1.2 1.5 Solubility: Dissolve in benzene, toluene, ether and acetone. Dissolve slightly in ethanol. Insoluble in water. 1.6 Boiling point: 220-225℃, 0.5mmHg 1.7 Stability and reactivity: Flammable. When it’s exposed to air or sunlight, the product will be oxidized and change its color. When contacted with hot dilute hydrochloric acid, it becomes green. 2. Technical indexes:

<Span style="line-height: 24px; font-family: Verdana; color: #000000; font-weight: normal; font-style: normal; font-size: 12pt;">Item	Index
	Refined	1stgrade	2ndgrade
Initial melting point,℃	≥140.0	≥135.0	≥125.0
Ash content ,%(m/m)	≤0.40	≤0.40	≤0.40
Decrement by heating ,%(m/m)	≤0.40	≤0.40	≤0.40
Remainder through sieving (100 mesh),% (m/m)	≤1.0	≤1.0	≤1.0
Appearance	Greyish brown powder

3. Application: It can be used as the antioxidant in solid propellant to improve the storage stability of the product. It has been used for those natural, styrene-butadiene, acrylonitrile-butadiene, butadiene, butyl, hydroxyl, polyisoprene rubber to possess performance such as good flex life and crazing for enhancing the tensile modulus, strengthening the defending function to hot-oxygen , ozone and some harmful metals such as copper, manganese with not influence on vulcanization of those rubbers. It can resolve aging problem existing in the deep-color rubber products while antioxidant H is used together with antioxidant D. Moreover, it can be also used as the hot-oxygen stabilizer for those engineering plastics such as polyethylene, polypropylene, polyamide, polyformaldehyde and etc to improve their climate-resisting performance. The reference dosage is 0.2-0.3%.   4. Safety instructions: Toxic. Rubber gloves, respirator and eye protection must be used during operations in case of skin contact, eyes contact..     www.tanyunchem.com

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Product Categories : Anti-aging additive