Polyurethane catalyst DY-1

2021-11-25   Pageview:168

Polyurethane catalyst DY-1.
Standard foaming polyurethane catalyst, 70% of BDMAEE dissolved in diol.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Kaolin has an inherent pH in the acidic range, and it reacts with epoxy resins and polyolefin resins. Kaolin has good acid and alkali resistance. To remove the bound water contained in it, a temperature of more than 1000°C is required, so it has good thermal stability. Kaolin is divided into hydrated kaolin, calcined kaolin, refined kaolin, and activated kaolin.

Hydrated kaolin is non-abrasive, chemically stable and has a high specific surface area. Its acidic pH value may lead to reactivity; blasted kaolin is harder and has good electrical properties; refined kaolin is a pure white filler with uniform and fine particle size Activated kaolin is a kaolin treated and modified with surfactants, and its dispersibility, electrical properties, and water resistance are better than ordinary kaolin.

Kaolin is usually very white, non-conductive, and has high chemical resistance, even to strong acids. Kaolin can be added to various fire-retardant coatings, which can improve the chemical resistance and electrical properties of fire-retardant coatings, reduce water absorption, reduce the creep tendency of coatings, and polyamide wax yarn improve impact resistance and the surface quality of the coating. This kind of kaolin sheet The shape structure also improves the surface hardness of the coating film. Kaolin is not only used as a filler and extender pigment for fireproof coatings, but also as a reinforcing material in fireproof coatings, and acts as a skeleton and flame retardant. It can increase the impact strength of the coating film and improve the toughness and elasticity of the fireproof coating.

The main component of wollastonite is calcium metasilicate (CaSiO g). The theoretical composition of calcium metasilicate is: CaO 48.3%, SiO, 51.7%, relative molecular weight 116.4, needle-like, rod-like, granular, etc. A mixture of particles of various shapes, most of the particles have an aspect ratio of 15*1, small oil absorption and water absorption, good chemical stability, relative density 2.79. pH value 9, Mohs hardness 4.8, refractive index 1.655, oil absorption 23. Average particle size The diameter is 6~25pm.

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