Bonding Rubber To Metal Adhesive Comparable to Chemlok 250 6150 Cilbond 89E

1. Introduction(What Is Bonding Rubber To Metal Adhesive 830)

Bonding Rubber to Metal Adhesive 830 is a versatile, one-coat adhesive designed for bonding a wide range of elastomers to various substrates during vulcanization. Its formulation consists of a blend of polymers, organic compounds, and mineral fillers dissolved or dispersed in an organic solvent system. This single-coat application simplifies the bonding process, reducing labor, solvent usage, inventory, and shipping costs.

Adhesive 830 effectively bonds natural rubber (NR), polyisoprene (IR), styrene-butadiene (SBR), polybutadiene (BR), polychloroprene (CR), nitrile (NBR), butyl (IIR), EPDM, and polyepichlorohydrin (ECO) elastomers to a variety of metals, including carbon and alloy steels, stainless steel, aluminum, copper and copper alloys, magnesium, and zinc. It also adheres well to certain plastics, composites, and fabrics.

Equivalent to Chemlok 250/6150, Cilbond 89E, Thixon 2001.

2. Features and Benefits

• Convenient: Single-coat application reduces labor, solvent use, inventory, and shipping expenses.
• Versatile: Bonds a broad spectrum of elastomers to metals, plastics, and fabrics. Compatible with existing production lines and tolerates diverse stock formulations.
• Durable: Achieves rubber-tearing bonds and provides excellent adhesion to plated metals, minimizing scrap rates.

3. Physical Properties

4. Applying Bonding Rubber To Metal Adhesive 830
1). Chemical Cleaning
Suitable for automated lines and parts susceptible to distortion from blast cleaning or requiring tight tolerances. Phosphatizing is commonly used for steel, while conversion coatings are typical for aluminum.
2). Mechanical Cleaning

Grit blasting is the most common method. Use steel grit for ferrous metals and aluminum oxide, sand, or other nonferrous grit for stainless steel, aluminum, brass, zinc, and other nonferrous metals. Machining, grinding, or wire brushing can also be used.
For detailed surface preparation instructions for specific substrates, consult the Adhesives Application Guide. Handle cleaned metal surfaces with clean gloves to prevent contamination. Apply Adhesive 830 to stainless steel, aluminum, brass, and other nonferrous substrates within one-half hour of cleaning. Ferrous substrates like steel can tolerate longer layover times if rust formation is prevented.
Mixing – Thoroughly stir Adhesive 830 before use and maintain agitation during use to ensure uniform suspension of solids. Dilution, if necessary, should be determined empirically based on the application method. Agitation is crucial as dilution accelerates settling.
Applying – Apply 830 adhesive by brush, dip, roll coat, spray or any other method that gives a uniform coating and avoids excessive runs and tears. When using 830 adhesive as a one-coat adhesive, the dry fi lm thickness should be 17.8-30.5 micron (0.7-1.2 mil). When used as a covercoat over a primer, the dry film thickness of 830 adhesive should be 15.2-20.3 micron (0.6-0.8 mil).
• Brushing
Apply full strength. The best bonds will be achieved by a uniform and complete surface coverage.
• Dipping
Dilute adhesive with 10-25% xylene or toluene, by volume, to a Zahn Cup #2 viscosity of 30-48 seconds. Controlled withdrawal minimizes tears and drips.
• Roll Coating
Apply full strength. For best results, apply uniformly to surfaces.
• Spraying
Dilute adhesive 830 with 25-50% xylene or toluene, by volume, to a Zahn Cup #2 viscosity of 21-24 seconds. The adhesive must be wet when it reaches the metal part. If drying occurs in the air before reaching the metal, cobwebbing and poor adhesion will result.
For electrostatic applications, dilute adhesive to a Zahn Cup #2 viscosity of 30 seconds, using technical grade methyl ethyl ketone (MEK) in ratio of 4 parts adhesive to 1 part solvent.
Drying/Curing – Allow the applied adhesive to dry for 20-40 minutes at room temperature until the solvent has completely evaporated. Drying time can be reduced by preheating metal inserts (maximum 65°C/150°F) or oven drying after application. Moderate drying temperatures are recommended for coated parts, although temperatures up to 149°C (300°F) can be used for short periods. Maximum airflow at minimum temperatures optimizes drying.
Dried adhesive films are non-tacky, allowing coated parts to be stacked for later processing. Handle coated parts with clean gloves and protect them from contamination. Properly protected coated parts can withstand extended layover times before bonding, although high humidity may shorten this window. Damaged areas can be recoated before bonding.
Adhesive 830 is suitable for compression, transfer, injection, and other molding processes. Optimal adhesion occurs when the rubber is fully cured concurrently with the adhesive. Load the coated metal parts into the mold and quickly fill the cavity with rubber.
Dry adhesive films remain stable at molding temperatures, minimizing wiping or sweeping during transfer and injection molding. While minimizing mold loading cycles is preferred, Adhesive 830 can withstand moderate prebaking times. Transfer and injection molds require well-designed runners and sprues, along with sufficient pressure, to prevent premature rubber curing.
Cleanup – Use solvents such as xylene and MEK to remove adhesive before heat is applied. Once cured, removal by solvent is not possible.

5. Shelf Life/Storage

Shelf life is one year from date of shipment when stored in a well ventilated area at 21-27°C (70-80°F) in original, unopened container. Do not store or use near heat, sparks or open flame.
Avoid excessive exposure to high humidity. Keep container tightly closed when not in use. Once opened, fit the 55-gallon drum of adhesive with desiccant tubes.

6.Packing
3.5kg/drum; 20kg/drum

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