Glue to Bond Rubber to Metal 830 - Equivalent to Chemlok 250/6150, Cilbond 89E, Thixon 2001

Glue to Bond Rubber to Metal 830

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

Introduction

Glue to Bond Rubber to Metal 830 is a high-performance, single-coat adhesive designed for bonding elastomers to various substrates during the vulcanization process. It is formulated with a blend of polymers, organic compounds, and mineral fillers, all dissolved or dispersed in an organic solvent system.
A single application of Glue to Bond Rubber to Metal 830 effectively bonds compounds based on natural rubber (NR), polyisoprene (IR), styrene-butadiene (SBR), polybutadiene (BR), polychloroprene (CR), nitrile (NBR), butyl (IIR), EPDM, and polyepichlorohydrin (ECO) polymers to a wide range of metals, including carbon and alloy steels, stainless steel, aluminum, copper and copper alloys, magnesium, and zinc, as well as various plastics, composites, and fabrics.

Features and Benefits

Convenient – Requires only a single coat for most applications, reducing labor, solvent usage, inventory, and shipping costs.

Versatile – Bonds a wide range of elastomers to metals, plastics, and fabrics; compatible with existing production lines and a variety of stock formulations.

Durable – Delivers strong rubber-tearing bonds and superior adhesion to plated metals, reducing scrap rates.

Typical Properties

Applying 830

• Chemical Cleaning

Chemical treatments are readily adapted to automated metal treatment and adhesive application lines. Chemical treatments are also used on metal parts that would be distorted by blast cleaning or where tight tolerances must

be maintained. Phosphatizing is a commonly used chemical treatment for steel, while conversion coatings are commonly used for aluminum.

• Mechanical Cleaning

Grit blasting is the most widely used method of mechanical cleaning. However machining, grinding or wire brushing can be used. Use steel grit to blast clean steel, cast iron and other ferrous metals. Use aluminum oxide, sand or other nonferrous grit to blast clean stainless steel, aluminum, brass, zinc and other nonferrous metals.

For further detailed information on surface preparation of specific substrates, refer to Adhesives application guide. Handle clean metal surfaces with clean gloves to avoid contamination with skin oils. Apply 830 adhesive to stainless steel, aluminum, brass and other nonferrous substrates within one-half hour after cleaning. For ferrous substrates such as steel, a long layover can be tolerated if no rust is formed.

Mixing – Thoroughly stir Glue to Bond Rubber to Metal 830 before use, and agitate sufficiently during use to keep dispersed solids uniformly suspended. If needed, proper dilution for the various application methods is best achieved by experience. Give careful attention to agitation since dilution will accelerate 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 Glue to Bond Rubber to Metal 830 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. Proper withdrawal will help reduce the tears and drip edges.

• Roll Coating

Apply full strength. For best results, apply uniformly to surfaces.

• Spraying

Dilute Glue to Bond Rubber to Metal 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 until visual examination of the fi lm has shown that all solvent has evaporated. This will take approximately 20-40 minutes at room temperature. Drying time can be shortened by either preheating the metal inserts or oven

drying after application. Metal parts may be preheated to a maximum of 65°C (150°F) prior to adhesive application. For coated parts, moderate drying temperatures should be used, but temperatures as high as 149°C(300°F) may be used for very short periods of time. Maximum air flow at minimum temperatures will give the best results.

Dried films of Glue to Bond Rubber to Metal 830 are non-tacky; therefore, coated parts can be piled into tote pans for subsequent 

processing. Wear clean gloves when handling coated parts and cover the tote pans to prevent contamination by dirt, dust, grease, oil, etc. If coated parts are properly protected, long layover times between adhesive application and bonding usually have no adverse effect on the bond. If humidity is high, layover time will be shortened. If Glue to Bond Rubber to Metal 830 has been removed by chipping or abrasion during handling, these damaged areas can be recoated before bonding.

Glue to Bond Rubber to Metal 830 can be used to bond rubber by compression, transfer, injection or other molding procedures used to make bonded parts. Maximum adhesion is obtained when the rubber has completely cured. Ideal bonding conditions exist when both the adhesive and the rubber cure at the same time. To accomplish this, load the adhesive coated metal parts in the mold and quickly fill the cavity with rubber.

Dry films of Glue to Bond Rubber to Metal 830 remain firm at molding temperatures. During transfer or injection molding operations, the adhesive shows minimal tendency to wipe or sweep.

While it is desirable to keep mold loading cycles to a minimum to prevent pre-cure of the adhesive and the rubber, Glue to Bond Rubber to Metal 830 will resist moderate prebaking times without affecting bond performance. Transfer or injection molds need properly designed runners and sprues, as well as adequate pressures. This prevents rubber pre-curing before the mold cavities are completely filled.

Cleanup – Use solvents such as xylene and MEK to remove adhesive before heat is applied. Once cured, removal by solvent is not possible.

Packing

3.5kg/drum; 20kg/drum

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. Information on desiccant tubes can be obtained from your Technical Service Representative.