Rubber to Metal Bonding Agent 828

1. Application

Surface treatment agent for RUBBER bonding. Used as a surface coating in conjunction with Dual Coat substrate surface treatment agent, suitable for the following rubbers: Natural rubber (NR), Nitrile butadiene rubber (NBR), Butyl rubber (IIR), EPDM, etc

2. Characteristics

● As a topcoat, used in conjunction with substrate surface treatment agent.

● Environmentally friendly, free of heavy metals, in line with GB33372-2020, ROSH 2.0;

● Excellent bonding properties -- non-polar rubber；

● Good weather resistance - heat resistance, water resistance, solvent resistance, oil resistance, salt resistance, corrosion resistance;

3. Physical Properties

● Component: Polymers, organic compounds, inorganic fillers and organic solvents

● Color: Black

● Viscosity: 200 ~ 800cps @25℃, Brookfield LV2 30rpm

30 ~ 60s @25℃, No.3 Zahn Viscosity Cup 2

● Solid Content: 12 ~ 16 %（By weight）

● Flash Point: 25℃

● Dilute release agent: Xylene

● Storage, Room temperature: Unopened container for 12 months

4. Applying  828

●  Stirring: 828 in the long-term storage process will have some precipitation at the bottom of the container, before the glue must be fully stirred, to achieve uniform mixing before use; If the gluing process is long, stir at a high speed for 3-5 minutes at an interval of 2 hours.

● Dilute: According to the actual operation needs, this product can also add diluent for appropriate dilution. After dilution, it must be stirred for more than 30 minutes to achieve uniform mixing before use, ensuring that all components are evenly dispersed. It is recommended to dilute the diluted product according to the amount used. The diluted product cannot be stored for a long time.

● Brush coating method: no dilution is required;

● Roller coating method: no dilution is required;

● Dip: 100 parts of 828 plus about 10-30 parts of diluent;

● Spray method: 100 parts 828 plus about 20-40 parts diluent.

● Coating: This product can be applied by brush coating, dip coating, roll coating, spray coating and other methods. Coating should be uniform to avoid excessive spillover.

Cover coating: Dry film thickness（DFT） 12-25μm. 20μm is recommended 20-40μm for harsh environment；

Single coating: DFT 15-25μm, 22μm is recommended.

● Drying: Drying at room temperature takes about 45-60 minutes, forced drying can shorten the drying time，recommended drying temperature is 60-80℃.

● Product storage: This product should be stored in dry and normal temperature environment, avoid long-term exposure to high humidity and high temperature environment. According to the need can be cured immediately after drying, and pollution should be avoided during parking.

●  Cleaning: Before heating vulcanization, dip a rag in xylene solvent to remove excess treatment agent spilt around. Once cured, solvent cannot be removed.

● Vulcanization: Vulcanization of rubber and adhesive at the same time can obtain the best bonding properties. When the coating is placed in the molding mold, it should be quickly filled with rubber vulcanization. The actual curing condition depends on the curing condition of the rubber.

5. Notes

Rubber to Metal Bonding Adhesive 828 storage temperature should not be lower than the recommended

temperature (below 15 ℃), otherwise gel will appear. If this situation occurs, the 828 can be sealed and heated to 25 ℃ , and then stirred at high speed until it returns to normal state before normal use.

6. Precautions

● This product is volatile, please close the container after use.

● Solvent steam is harmful, pay attention to fire prevention in the workplace, pay attention to low ventilation, prevent long-term inhalation or long-term skin contact.

● Please refer to SDS for more safety information.