BYK CERAFLOUR 991 additives improve surface slip, scratch resistance and heat resistance of the surface.
How to use BYK CERAFLOUR 991:
CERAFLOUR 981 is recommended for use in polyester / TGIC / Primid type / powder link based, polyester / powder coating epoxies, acrylates, polyurethanes and epoxy compounds.
0.1-0.3% of additive (if provided) based on total formulation.
Additive Method and Processing Guidance:
A high speed mixer should be used to mix the resin, curing agent, pigments and other additives.
The mechanism of action of flame retardant L5.6.7 has not been studied deeply at present, but its basic principle is considered around the three basic elements of oxygen, heat and combustible combustion. In principle, the flame retardant effect of flame retardants is achieved by preventing and slowing down combustion:
① Thermal decomposition is the cause of combustion, and the added flame retardant can prevent the thermal decomposition of the material to produce free radical chains.
②As the inorganic flame retardant has a large heat capacity value and low thermal conductivity, adding various inorganic flame retardants can play the role of heat insulation, can amide modified polyethylene wax effectively prevent the temperature of the material from heating up, and make the system temperature less than that of thermal decomposition and flammability. The temperature of the gas.
③Add flame retardant that can decompose after endothermic, such as hydrated aluminum oxide and so on. Because this additive has the characteristic of decomposing after endothermic, it can effectively maintain the system at a lower temperature without reaching the degree of thermal decomposition.
④ Use flame retardants that can release active gas compounds under the action of heat. In this way, the active compound usually has an effect on the free radicals that affect the formation or growth of the flame. It mainly acts on the binding and termination of free radicals in combustion, such as commonly used Sb2Os. Halogen compounds are one of the typical examples of their effects in this way.
⑤Select a flame retardant that can release a large amount of inert gas during decomposition, and prevent the combustion of combustible gas products decomposed by the system or prevent the flame reaction. The existence of a large amount of inert gas can dilute the combustible gas decomposed by the system and reduce the system at the same time. The temperature of the decomposition product, so the obtained mixture and the surrounding gas oxidizer can no longer spread the flame.
⑥In some cases, after the flame retardant added is heated, it does not change chemically, but only releases heavy substances. Steam. This vapor can cover the combustible gas decomposed by the polymer, affect its normal exchange with air and oxygen, thereby suffocating the flame, and play a role in fire and flame retardant.
⑦It is used as a barrier in fire retardant coatings and fire retardant liquids. The fuel should have low water solubility and low moisture absorption.
Now the commonly used flame retardant compounds are as follows:
Generally, inorganic flame retardants have less smoke properties than organic flame retardants, and most flame retardants with smoke suppression effect are inorganic compounds. Inorganic flame retardants have the advantages of good thermal stability, low toxicity or non-toxicity, no corrosive gas, no volatilization and no precipitation during storage, long-lasting burning resistance, long-lasting flame retardant effects, etc., and the source of raw materials is abundant. The price is low.
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