Coupling agent issue
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What type of coupling agent can be added to chlorinated polyethylene and lightweight calcium carbonate blending systems to improve their tensile strength? ! I would like to ask for advice
Titanate coupling agents work well; they are commonly used when increasing the amount of inorganic fillers
Adding a certain amount of MBS or ACR can also increase the tensile strength.
The addition amounts of silane coupling agents, titanate coupling agents, and aluminate coupling agents should be determined by estimating based on the particle size and surface area of the inorganic fillers.
Regarding the original poster’s question, all the answers given above are correct. Generally speaking, silane coupling agents, titanate coupling agents, and aluminate coupling agents can all solve your problem. I believe that the use of coupling agents generally increases costs. Based on my experience, I recommend: 1. Remove moisture from light calcium carbonate by baking it at 150 degrees for 2–3 hours ； 2. In the high-speed mixer, an appropriate amount of calcium stearate is added for surface treatment before it is mixed into the polyvinyl chloride substrate. It should be able to effectively solve your strength issue, but it should be noted that an increase in the amount of lightweight calcium carbonate will also increase the hardness of the material.
If calcium carbonate is used, a titanate coupling agent can be added. Silane coupling agents can be added using silica. However, the coupling agent is not an essential component in the formula.
Silane coupling agent or titanate coupling agent
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