Phosphocyanide Catalyst (ChicStabLQ-1)

Product Description

Chicstab LQ-1  is a high-activity ring-opening polymerization catalyst in powder form, specifically designed with phosphocyanide for superior performance. It excels in the synthesis of polyether polyols, where small molecules serve as initiators, allowing for direct blocking with ethylene oxide to yield primary hydroxyl groups. Notably, the head-tail (H-T) configuration of polyether molecules offers exceptional selectivity. Polymerization facilitated by phosphorus cyanide catalysts addresses shortcomings associated with conventional catalysts like potassium hydroxide. These include issues such as low relative molecular weight, broad molecular weight distribution, and high unsaturation levels in resulting polymers.

Physical Properties

Guideline for use

1. React equimolar amounts of the catalyst with potassium methoxide in methanol. Filter off the precipitate to obtain a catalyst solution.
2. Combine the initiator and catalyst solution at room temperature under a nitrogen atmosphere. Remove the solvent under vacuum at a specified temperature for 1 hour.
3. Increase the temperature to 90°C and introduce monomers for polymerization. Maintain the polymerization temperature at 90°C to 95°C for propylene oxide and 100°C to 105°C for ethylene oxide.
4. Suitable initiators include small molecules like glycerin, propylene glycol, or low molecular weight polyethers (e.g., 500 or 1000 molecular weight).
5. When using low molecular weight polyethers, prefer those without antioxidants to avoid coloration.
6. Crude ethers containing KOH can be used to remove potassium ions post-polymerization. Crude ethers are recommended as starters.
7. Ensure the water content of initiators and monomers is below 300ppm. High water content in initiators may impair catalyst activity.
8. Initially, use about 1/1000 of the catalyst, gradually reducing the amount with subsequent uses. The catalyst concentration will be marked for precise measurement.
9. Store the catalyst sealed in a desiccator and use promptly.
10. Catalyst removal methods include acid neutralization followed by adsorbent treatment or direct adsorbent treatment. Experimentation may be required for specific conditions.
11. The catalyst’s molecular weight is calculated as 500.

These guidelines are designed to optimize catalyst performance and polymerization outcomes. 

Shelf life

3 years from the date of production under unopened original packaging.

Storage and Transportation

Store in a cool, dry, and dark environment, ensuring the container is tightly sealed. Upon opening, reseal the container promptly and utilize the product as soon as possible. During transportation, take precautions to prevent leakage, adhere to standard industrial handling practices, handle with care, and minimize the risk of environmental contamination.