GUM-EASY T78,T88

• Dispersion & Homogenizing Agent

Overview

GUM EASY T-78 / T-88 (膠易素) is a dispersion & homogenizing agent for rubber processing.
T-78 is recommended for dark / carbon-black compounds, while T-88 is recommended for light / white-filler compounds, helping improve mixing dispersion and processability.

Physical & Chemical Properties

• Composition: Metallic stearate-based

• Appearance: Light brown / yellow-brown dust-free granules (T-78) / gray-white dust-free granules (T-88)

• Recommended for: Dark / carbon-black compounds (T-78) ｜ Light / white-filler compounds (T-88)

• Odor: None

• Solubility in water: < 20%

• Density: 0.75 ± 0.05

• pH: 8.5 ± 1 (Alkaline)

• Moisture: < 2.5% (as shipped)

• Ash content: < 27 ± 2%

• Softening point: 75–80 ℃

• Shelf life: 2 years

• Packing: Double-layer laminated woven bag; Net 25 kg/bag

Performance & Applications

• Provides chemical and physical mastication to improve mixing efficiency, reducing mixing time and power consumption.

• Improves compound flow and dispersion, resulting in more uniform mixing, smoother surface, fewer voids, and higher compactness.

• Supports development of fully synthetic rubber formulations by enabling higher synthetic rubber and carbon black loading to reduce raw material cost.

• Improves compatibility among ingredients and helps reduce blooming.

• Enhances calendaring and extrusion performance and lowers Mooney viscosity.

• Does not negatively affect Mooney scorch time, cure rate, hardness, modulus, tensile strength, or aging properties; can noticeably improve abrasion resistance.

• Widely applicable for tires, belts, hoses, extruded / injection rubber products, foams, and molded rubber goods.

※ Actual results should be verified by trial based on formulation, equipment, and operating conditions.

Applicable Rubbers

• Natural Rubber (NR)

• Styrene-Butadiene Rubber (SBR)

• Butadiene Rubber (BR)

• Isoprene Rubber (IR)

• Ethylene-Propylene-Diene Rubber (EPDM)

• Chlorosulfonated Polyethylene (CSM)

• Isobutylene-Isoprene Rubber (IIR)

• Chloroprene Rubber (CR)

• Acrylonitrile-Butadiene Rubber (NBR)

• Polyacrylate Rubber (ACR)

• Acrylic Rubber (ACM)

Recommended Dosage / How to Use

• Add during mixing or when adding compounding ingredients.

• Dosage depends on carbon black loading and surface area:
  ・Use 3.0 ± 1.0% of HAF amount
  ・Use 2.0 ± 1.0% of SRP amount

• Use 0.5%–2.0% based on raw rubber.

• For Chloroprene Rubber (CR), use about 1–3 PHR (approximately 2–3× typical dosage depending on formulation).

Notes & Disclaimer

This information is provided in good faith based on years of on-site use and verification. Since applications and operating conditions vary, please conduct trials under actual conditions before adoption.