Organic bentonite for composite flame retardants and preparation process thereof

Abstract

The invention provides a preparation process for an organic bentonite for composite flame retardants, which adopts sodium bentonite as a raw material to be mixed with composite organic cation surfactant. The preparation process is characterized in that: 3 to 4 parts of sodium hexametaphosphate is added into 300 to 500 parts of deionized water, 30 to 50 parts of sodium bentonite is then added, and after high-speed agitation, bentonite suspension solution is produced; 12 to 20 parts of composite organic cation surfactant is added into 120 to 200 parts of solvent, and after high-speed agitation, composite organic cation surface modifier solution is produced; under the state of high-speed agitation, the composite organic cation surface modifier solution is added into the bentonite suspension solution, ammonia is used for regulating the pH of the mixed solution to be 8 to 9, agitation is carried out under thermostatic waterbath of 75 DEG C to 85 DEG C for 2 hours, centrifugal separation is carried out after the temperature is cooled to the room temperature, and after vacuum drying under 80 DEG C to 90 DEG C and grinding, the organic bentonite for the composite flame retardants is prepared. The organic bentonite obtained by the method has good lipophilicity and a good flame-retardant effect, and can be applied in the modification of paint, ink and plastic, and while the dosage of other flame retardants is reduced and the cost is saved, the flame-retardant property and mechanical property of polymer can be enhanced as well.

Description

Technical field

[0001] The invention belongs to the technical field of fine processing of bentonite, and specifically relates to a preparation method of organic bentonite for composite flame retardants. Background technique

[0002] Bentonite is a non-metallic mineral with montmorillonite as the main component. The crystalline structure of montmorillonite is a 2:1 layered structure of two silicon-oxygen tetrahedrons and a layer of aluminum-oxygen octahedron, which has good expansibility. , Adsorption, adhesion, catalysis, thixotropy, suspension, cation exchange and large internal and external specific surface area, known as "universal" clay. my country is rich in bentonite resources, second only to the United States, ranking second in the world. Organobentonite is a deep processed product of bentonite. Due to its hydrophobic and lipophilic properties, it has good dispersibility, solubilization and emulsification in organic solvents, so it is widely used in plastics, paints, inks...

Images