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High-Quality Antioxidant RD (CAS 26780-96-1) - Heat-Oxygen Resistant for Rubber Tires/Hoses

Name: High-Quality Antioxidant RD (CAS 26780-96-1) - Heat-Oxygen Resistant for Rubber Tires/Hoses
Brand: Jienuo
Rating: 5.0 (25 reviews)

Antioxidant RD, with CAS number 26780-96-1 and chemical name Poly(1,2-dihydro-2,2,4-trimethyl-quinoline), is a key rubber antioxidant. It appears as pale yellow to amber powder/flakes, is non-toxic, has a density of 1.08, melting point of 72-94°C, and is insoluble in water but soluble in benzene, chloroform, etc.
Mainly for natural and synthetic rubbers (nitrile, butadiene, etc.), it excels in resisting heat-oxygen aging and heavy metal-catalyzed rubber degradation. However, it performs poorly against flexure aging, so it's often used with antioxidants like AW or 4020. It's widely applied in tires, hoses, tapes, wires, etc., due to good solubility in rubber, low migration, and no frosting even at 5 parts dosage.

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Model:
Antioxidant RD
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Jienuo

Product Description

Product Brief of Antioxidant RD

Antioxidant RD, with CAS number 26780-96-1 and chemical name Poly(1,2-dihydro-2,2,4-trimethyl-quinoline), is a key rubber antioxidant. It appears as pale yellow to amber powder/flakes, is non-toxic, has a density of 1.08, melting point of 72-94°C, and is insoluble in water but soluble in benzene, chloroform, etc.

Mainly for natural and synthetic rubbers (nitrile, butadiene, etc.), it excels in resisting heat-oxygen aging and heavy metal-catalyzed rubber degradation. However, it performs poorly against flexure aging, so it's often used with antioxidants like AW or 4020. It's widely applied in tires, hoses, tapes, wires, etc., due to good solubility in rubber, low migration, and no frosting even at 5 parts dosage.

Product Advantage

Broad Compatibility & Temperature Adaptability: It is compatible with almost all elastomers, including natural rubber and synthetic rubbers like nitrile, butadiene, and ethylene-propylene rubber. With a wide temperature application range, it maintains stable performance in diverse working environments, meeting the anti-aging needs of rubber products under different temperature conditions 4. Its boiling point exceeds 315°C and melting point ranges from 72-94°C, ensuring thermal stability.
Long-Term Thermal Aging Resistance: Due to its good continuity in rubber, the rubber compound with Antioxidant RD gains long-term resistance to thermal aging. Its high molecular weight reduces migration in the rubber matrix, avoiding "spray frost" issues—even when the dosage reaches 5 parts, no frosting occurs, which helps maintain the rubber's performance over time.
Heavy Metal Catalysis Inhibition: It can effectively prevent rubber degradation catalyzed by heavy metals, a key advantage that protects rubber products from premature aging caused by heavy metal contaminants in the environment or during production, extending the products' service life.
Favorable Vulcanization & Crosslinking Performance: Generally, it does not affect the vulcanization characteristics of natural and synthetic adhesives. In peroxide-vulcanized EPDM and NBR compounds, it not only provides excellent heat resistance but also has little impact on crosslinking density, with a typical dosage of 0.25-2.0 parts for such applications.
Flexible Dosage & Cost-Effectiveness: For dry glue applications, it serves as the main antioxidant with a dosage of 0.5-3.0 parts; for light-colored products (no discoloration allowed), the dosage is ≤0.5 parts. In latex applications, the dry base dosage is 0.5-2.0 parts. This flexible dosage range allows precise matching of anti-aging needs while controlling costs .

Technical Specifications

Parameter Category	Specific Parameter	Specification/Value
Basic Identification	Chemical Name	Poly(1,2-dihydro-2,2,4-trimethyl-quinoline)
	CAS Number	26780-96-1
	Synonyms	Antioxidant RD; Poly real (1,2,4-trichlorobenzene - dihydro - 2 - trimethyl - quinoline)
Physical & Chemical Properties	Appearance	Pale yellow to amber powder or flakes
	Density	1.08
	Melting Point	72-94°C
	Boiling Point	>315°C
	Water Solubility (23°C)	<0.1 g / 100 mL
	Softening Point	Above 74°C
	Heating Reduction	≤0.5%
	Ash Content	≤0.5%
	Solubility	Insoluble in water; soluble in benzene, chloroform, acetone and carbon disulfide; slightly soluble in petroleum hydrocarbons
Dosage Requirements	Dry Glue Application (Main Antioxidant)	0.5-3.0 parts; ≤0.5 parts for light-colored products (no discoloration allowed)
	Latex Application (Dry Base)	0.5-2.0 parts (powder dispersion, slight coloring allowed)
	Peroxide-Vulcanized EPDM/NBR	0.25-2.0 parts
	General Anti-Degradation Protection	0.5-1.0 parts RD + 1.0 parts 4020
	High-Performance Protection	1.0-2.0 parts RD + 1.0-3.0 parts 4020

Product Uses

Tire Manufacturing: It is a common antioxidant for tires, especially suitable for tire treads and other parts under dynamic conditions. When used with antioxidants like 4010NA or AW, it enhances the tire's resistance to heat, oxygen, and fatigue, adapting to the high-temperature and frequent friction environment of tires.
Rubber Hose & Tape Production: Applied in manufacturing rubber hoses and tapes, it resists heat-oxygen aging, preventing the products from hardening, cracking, or leaking due to long-term use, ensuring their durability in industrial and daily scenarios .
Wire & Cable Sheathing: Used in rubber sheathing of wires and cables, it protects the sheathing from heat-oxygen and environmental factors, maintaining the sheathing's insulation and mechanical properties, which is crucial for the safe operation of wires and cables.
Elastomer Products for Special Scenarios: In peroxide-vulcanized EPDM and NBR compounds (e.g., industrial seals), it provides excellent heat resistance, making these elastomer products suitable for high-temperature working environments like industrial pipelines.
Latex Products (With Slight Coloring Allowed): For latex products where slight coloring is acceptable, its powder dispersion can be used. With a dry base dosage of 0.5-2.0 parts, it adds anti-aging properties to latex products such as certain rubber gloves.

Product Operate Guide

For dry glue: Use RD as main antioxidant (0.5-3.0 parts). For light-colored products (no discoloration), limit to ≤0.5 parts. It won't affect vulcanization of most rubbers but may reduce neoprene adhesive storage stability. For latex (slight coloring allowed): Apply RD powder dispersion, 0.5-2.0 parts dry base. For peroxide-vulcanized EPDM/NBR: Use 0.25-2.0 parts for heat resistance. Pair with 4020 for ozone/flexural fatigue resistance

FAQ

Q: Which rubbers is Antioxidant RD suitable for?
A: It works for natural rubber and synthetic rubbers like nitrile, butadiene, ethylene-propylene, and neoprene, fitting most elastomer applications .
Q: Do I need to use it with other antioxidants?
A: Yes, for flexure aging or ozone resistance, pair it with antioxidant AW, 4010NA, or 4020. For general anti-degradation, use 0.5-1.0 parts RD + 1.0 part 4020.
Q: What's the dosage limit for light-colored rubber products?
A: In light-colored products where discoloration is not allowed, the dosage of RD should not exceed 0.5 parts to avoid affecting appearance .
Q: Will RD affect the vulcanization of rubber adhesives?
A: Generally, it does not affect the vulcanization characteristics of natural and synthetic adhesives but may reduce the storage stability of neoprene adhesives.