Process for preparing flame-retardant adhesive

Abstract

The invention discloses a process for preparing a flame-retardant adhesive. The flame-retardant adhesive is prepared by the following steps: 1) selectively adding a powdery flame retardant and a solvent corresponding to the powdery flame retardant into an adhesive, immersing the powdery flame retardant in the solvent for 12h, wherein the volume ratio of the powdery flame retardant to the solvent is (1:3)-(1:5); 2) placing the resulting product obtained in step 1) in a horizontal sand mill, adjusting the pressure of horizontal sand mill to 4-6kg, grinding for five times to obtain a product having a fineness of 2-5mum; 3) filtering the resultant product obtained in step 2) by a filter screen having 150-400 meshes, and adding the filtered product to the adhesive while stirring; 4) injecting the stirred adhesive containing the powdery flame retardant into an online stirring device, installing pump exhausting pipes at the bottommost part of the online stirring device to pump glue output. The coating yield ratio of the flame-retardant adhesive is improved by the preparation method of flame-retardant adhesive provided by the invention.

Description

technical field [0001] The invention relates to a preparation method of an adhesive, in particular to a preparation process of a flame-retardant adhesive. Background technique [0002] At present, in the adhesive industry, the preparation method of flame retardant adhesives is to add a powder flame retardant to the adhesive. The particle size of this powder flame retardant is usually between 7-15 μm. Due to the powder With the addition of body-shaped flame retardants, after the adhesive is coated, there will be a large amount of granular residue on the rubber surface, which will affect the appearance yield and cause disadvantages to subsequent use. Therefore, customers are using this type of flame retardant adhesive At first, the adhesive should be pre-treated, including grinding, high-speed stirring, etc. Even so, if the current treatment is not correct, there will still be granular residues after coating, which will affect the coating yield; in order to reduce this In the...

AI Technical Summary

Problems solved by technology

[0002] At present, in the adhesive industry, the preparation method of flame retardant adhesives is to add a powder flame retardant to the adhesive. The particle size of this powder flame retardant is usually between 7-15 μm. Due to the powder With the addition of body-shaped flame retardants, after the adhesive is coated, there will be a large amount of granular residue on the rubber surface, which will affect the appearance yield and cause disadvantages to subsequent use. Therefore, customers are using this type of flame retardant adhesive At first, the adhesive should be pre-treated, including grinding, high-speed stirring, etc. Even so, if the current treatment is not correct, there will still be granular residues after coating, which will affect the coating yield; in order to reduce this In the pre-treatment process, some manufacturers of flame retardant adhesives add suspending agent to the adhesive, but because the physical stability of the added suspending agent is not enough, it has a certain impact on the performance of the glue, so this method is limited