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AFTLEAT(R) (Surface treating agent for Vulcanised Rubber)
AFTLEAT(R)
AFTLEAT® is a surface treating agent developed for getting remarkable adhesion of vulcanized rubbers in their pasting or painting processes.
Furthermore, AFTLEAT® can be applied as a surface treating agent, which decreases friction factor of a rubber surface.
These effects of AFTLEAT® comes from its chemical reaction with double bond of a rubber.
AFTLEAT® could enhance application of rubbers to automobile parts, construction materials, electric equipment or other industrial goods.

Characteristics
  • Remarkable effect by easy treatment procedure
  • Uniform treatment effect because of chemical reaction
  • No property change of a treated rubber

Physical properties
  • Color: pale yellow
  • Odor: thinner like odor
    Precaution: its vapor irrigates eyes and throat or other mucous membranes.
  • Specific gravity: 0.901
  • Flash point: -4 degrees C
Flammable substance, category 4, 1st class petroleum, Hazard class 2
(Fire Service Law: Japan)

Treatment procedure
  • Pre-treatment: removal of dust or release agent from the rubber surface
  • AFTLEAT® treatment: by dipping, brushing or spraying
  • Application of an adhesive or a paint:
    It should be applied after drying of AFTLEAT®, maybe after around 5 minutes.

Applicable rubbers
AFTLEAT® should be applied to rubbers with double bond.
  • Natural rubber (NR)
  • Poly-isoprene rubber (IR)
  • Styrene butadiene rubber (SBR)
  • Butadiene rubber (BR)
  • Nitrile butadiene rubber (NBR)
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Improvement of adhesion
AFTLEAT® improves adhesive strength in adhesion of vulcanized rubber / vulcanized rubber or vulcanized rubber / other materials.

Examples of AFTLEAT® application
  • Rubber shoe sole
  • Rubber roofing
  • Damping rubber
  • Tank lining material
  • Rubber hose

Workable adhesive agents with AFTLEAT®
Urethane adhesive
  • Epoxy adhesive
  • NBR based adhesive
  • CR based adhesive

Evaluation of adhesion improvement by AFTLEAT® Formulation for test piece rubber

Nipol IR-2200 (Poly-isoprene rubber) 100
Zinc oxide 5
Sulfur 2.5
Stearic acid 1
Carbon black 40
Accelerator CZ 0.8

Test procedure
  • Preparation of test pieces (vulcanized poly-isoprene rubber)
  • AFTLEAT® treatment of test pieces by brushing
  • Drying of volatile component
  • Application of an adhesive
  • Measurement of adhesive strength

Test result

Applied adhesive Adhesive strength (kg/inch)
control AFTLEAT® treated
Urethane adhesive
(Konishi-bond KU-10)		 1.2 31.4
(break of substrate rubber)
CR based adhesive
(Konishi-bond G-17)		 2.4 8.5
NBR based adhesive
(Konishi-bond G-103)		 0.2 14.2
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Surface modification
Examples of AFTLEAT® application
  • Wiper for automobile
  • Rubber roll
  • Automobile tire
  • Bladder for tire molding
  • Apron band
  • Other industrial goods (O-ring, packing, diaphragm etc.)

Formulation for test piece rubber

  NR#3 SBR1502 NBR1032 EPDM525
Rubber 100 100 100 100
Zinc oxide 5 5 5 5
Sulfur 1.5 1.5 15 1.5
Stearic acid 1 1 1 1
Carbon black 40 40 40 40
Accelerator CZ 2.0 2.0 2.0 -
Accelerator D 0.3 0.3 0.3 -
Accelerator TS - - - 1.5
Accelerator M - - - 0.5

Test procedure
Treatment of vulcanized rubber pieces with AFTLEAT®
  • Water washing and drying
  • Measurement of their friction factor
Measurement condition:
25 degrees C, 76% of relative humidity, 202g load
Chrome plating steel plate was applied.

Test result

  Friction factor
NR#3 SBR1502 NBR1032 EPDM525
control 5.2 6.6 8.2 6.1
AFTLEAT®
Treatment
5 seconds		 3.8 0.5 0.5 1.1
AFTLEAT®
Treatment
60 seconds		 3.5 0.5 0.5 0.6

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Precaution for handling and storage
  1. AFTLEAT® contains volatile organic solvent. Handle it under local ventilation system.
  2. Do not blend any acid, alkaline compound, solvent nor water with AFTLEAT®
  3. Store AFTLEAT® in a dark place. Avoid sunlight or UV light.
  4. Apply suitable safety equipment such as safety goggles and safety gloves in handling AFTLEAT®. Safety mask for organic solvent is recommended.

  1. This product is developed for industrial purpose. Before using the product for food, medical care, or other special applications, the user should confirm the necessary safety measures and precautions specific uses.
  2. The user must comply with the instructions provided in the Material Safety Data Sheet (MSDS).
  3. Information contained in this publication is accurate to the best knowledge and belief of Tokyo Zairyo Co., Ltd. and is subject to change as new information available. This document is provided for informational purpose only, and does not give any warranties or guarantees regarding the performance or quality of the product.