953P MOLD FREE

• External Lubricant　• Internal Mold Release Agent　• Flow Aid　• Flow Improver for Compression / Injection Molding

Overview

MOLD-FREE 935P (模得麗 935P) is an internal mold release agent / external lubricant for rubber processing. It can be used in rubber compounding and molding to improve processing safety, enhance flow and surface quality, and help extend mold service life.

Physical & Chemical Properties

• Composition: Metallic stearate-based

• Appearance: Milky-white, dust-free powder granules

• Odor: None

• Solubility in water: < 10%

• Density: 1.25 ± 0.05

• pH: 8.5 ± 1 (Alkaline)

• Moisture: < 2.5% (as shipped)

• Ash content: < 35%

• Softening point: 75–88 ℃

• Shelf life: 2 years

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

Performance & Applications

• Provides effective mold release and helps keep the mold clean and glossy, extending mold life.

• Offers dispersion and flow improvement, increasing extrusion speed, and improving surface smoothness.

• Helps prevent pre-vulcanization at high temperatures and reduces sticking on rolls.

• Maintains rubber product performance while enhancing toughness, strength, and abrasion resistance.

• Unlike common plasticizers, it does not adversely affect hardness, tensile strength, elongation, etc., and may improve chemical resistance (acid/alkali, water, oil, oxidation).

• Good high-temperature stability; suitable for higher curing temperatures, shorter cure times, and higher-productivity processes.

• Non-staining; in typical formulations, even up to 5 PHR, it is less likely to cause blooming.

• Recommended processing temperature 180–220 ℃ (heated mold curing). Can reduce cure time by about 30%–60%, depending on conditions.

• Synergistic when used with GUM FREE B-52 (膠富麗) or GUM EASY T-78 / T-88 (膠易素).

※ 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)

• Fluoroelastomer (FKM / Viton)

• Isobutylene-Isoprene Rubber (IIR)

• Chloroprene Rubber (CR)

• Acrylonitrile-Butadiene Rubber (NBR)

Recommended Dosage / How to Use

• Add together during rubber compounding/mixing.

• Depending on mold complexity and release requirements, add 1.5–2.5 phr relative to total rubber.

• Adjust by mold contamination level:
  ・General rubber: 1.0%–2.0% based on raw rubber
  ・Halogenated rubber (Cl/Br/F): 2.0%–4.0% based on raw rubber
  ・For CR applications: about 2–5 PHR

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.