Flame-retardant water-based emulsion for coating glass fiber sleeve and preparation method of emulsion

Abstract

The invention discloses a flame-retardant water-based emulsion for coating a glass fiber sleeve and a preparation method of the emulsion. The flame-retardant water-based emulsion is obtained through emulsion polymerization of an acrylate soft monomer, a hard monomer, a hydrophilic functional monomer, an organic silicon monomer and a bromine-containing flame retardant monomer, wherein the bromine-containing flame retardant monomer is one or more of 2,4,6-tribromophenyl methacrylic acid ester, 2,4,6-tribromophenyl maleimide, 2,4,6-tribromophenyl allyl ether, dibromostyrene and tribromostyrene. The invention also discloses a glass fiber sleeve coating material containing the flame-retardant water-based emulsion. The flame-retardant water-based emulsion is good in stability and small in grain size; the formed latex film is excellent in water resistance, mechanical properties and flame retardant property; as a result, even though the coating material added with a small amount of flame retardant is applied to coating the glass fiber sleeve, a coating layer which is excellent in flexibility and insulativity and high in flame retardant rating can be obtained, and the coating layer is applicable to occasions having high requirement for the flame retardant property.

Description

technical field [0001] The invention relates to a coating material, in particular to a flame-retardant aqueous emulsion for coating a glass fiber sleeve and a preparation method thereof. Background technique [0002] Fiberglass casing (referred to as fiberglass casing) is made of alkali-free glass fiber yarn woven into casing, treated at high temperature, and coated with heat-resistant and flame-retardant materials. The fiberglass casing itself has high insulation and heat resistance. Sex, corrosion resistance, aging resistance and heat dissipation, also has good softness and elasticity. At present, the silicone rubber fiberglass casing is widely used, which is made by coating the outer wall of the tube with organic silica gel and vulcanized. After vulcanization, it can be used for a long time in the temperature range of -65°C-260°C and maintains its soft and elastic properties. Compared with other polymer materials, it has better thermal stability, radiation resistance and...

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Problems solved by technology

[0003] Glass fiber sleeves have strict requirements on coating materials. In addition to good insulation, temperature resistance, water and oil resistance, they also need to have flame retardant effect in most applications. Silicone rubber fiberglass sleeves have better Heat-resistant and flame-retardant performance, but the flame-retardant performance is limited, and it is necessary to add a large amount of flame retardants to achieve a higher flame-retardant grade, resulting in rough appearance of the coating, poor mechanical properties and water resistance, and generally need to be used in the preparation process A large number of organic solvents dilute the silicone material and then coat it. After the film is formed, the volatilization of organic solvents such as toluene will cause serious pollution to the environment. It is easy to catch fire in a high-temperature operating environment and pose a safety hazard, which prompts people to look for suitable in the field of water-based materials. alternative material

At present, there are few water-based resin materials used for coating glass fiber sleeves, and most of them have the defects of poor water resistance and poor durability of the coating, and cannot achieve a high flame retardant level.

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