It is understood that: Ammonium polyphosphate, also known as ammonium polyphosphate (APP for short), is a white powder and is a nitrogen-containing phosphate. Ammonium polyphosphate can be divided into three types according to its degree of polymerization: oligopolymer, medium polyphosphate, and high polymer. The greater the degree of polymerization, the smaller the water solubility. Crystalline ammonium polyphosphate is a water-insoluble and long-chain polyphosphate. There are five variants from I to V. Among them, high-polymerization crystalline type II ammonium polyphosphate has significant advantages in the field of polymer materials due to its good water insolubility, high decomposition temperature, and good compatibility with polymer materials. Compared with halogen-containing flame retardants, crystalline type II ammonium polyphosphate has the characteristics of low toxicity, low smoke, and inorganic. It is a new type of high-efficiency inorganic flame retardant.
The specific characteristics and advantages of ammonium polyphosphate (APP) are as follows:
1. High purity, small addition amount; reduced formula cost, flame retardant Excellent and long lasting.
2. High phosphorus and nitrogen content, excellent flame retardant effect: low water solubility, good water resistance: not easy to absorb moisture.
3. The decomposition temperature is high, the decomposition temperature is greater than 250C, and it has good thermal stability under various natural conditions.
4. The PH value is close to neutral, and it has good compatibility and mixability with coatings, rubber and other polymers and resins, and can obtain a uniform and good appearance.
5. Fine particle size, white color, and good powder fluidity.
6. Excellent and durable flame retardancy.
7. Non-toxic and odorless, it will not produce toxic substances when decomposed by heat.
微信扫一扫打赏
