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Synthetic method for flame-retardant unsaturated polyester resin raw material applied to glass fiber-reinforced plastic septic tank

A polyester resin and glass tempering technology, applied in the field of polyester resin, can solve the problems of small specific gravity, high temperature, and a large amount of harmful smoke

Inactive Publication Date: 2019-01-29
安徽汇创新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] General unsaturated polyester resin products not only have excellent chemical corrosion resistance after curing, but also have good mechanical properties, and the specific gravity is relatively small. However, traditional unsaturated polyester resins are easy to burn, and the limiting oxygen index LOI value is only 19. A large amount of harmful smoke is produced when burning
When applied to the base material of FRP septic tank, the feces in the tank will inevitably generate extremely high temperature after long-term fermentation, and also produce a large amount of flammable gas. At this time, traditional unsaturated polyester resin is used as raw material to make molding FRP septic tanks must not meet the flame retardant requirements

Method used

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  • Synthetic method for flame-retardant unsaturated polyester resin raw material applied to glass fiber-reinforced plastic septic tank
  • Synthetic method for flame-retardant unsaturated polyester resin raw material applied to glass fiber-reinforced plastic septic tank
  • Synthetic method for flame-retardant unsaturated polyester resin raw material applied to glass fiber-reinforced plastic septic tank

Examples

Experimental program
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Effect test

Embodiment 1

[0025] A kind of synthetic method of flame-retardant unsaturated polyester resin raw material for FRP septic tank comprises the following steps:

[0026] S1. In terms of molar parts, mix 2 parts of maleic acid, 8 parts of isophthalic acid and 10 parts of propylene glycol, and then heat up to melting at a rate of 10°C / min under nitrogen protection, and then continue to heat up to 160°C Stir the reaction until the acid value of the system is lower than 25mgKOH / g, and cool down to 140°C to obtain an unsaturated polyester prepolymer;

[0027] S2, in parts by weight, add 20 parts of phosphorus-containing vinyl monomers, 0.02 parts of hydroquinone, and 1 part of dicumyl peroxide to 30 parts of the unsaturated polyester prepolymer obtained in S1, and cool to Room temperature, obtain described unsaturated polyester resin raw material;

[0028] The method for synthesizing the phosphorus-containing vinyl monomer includes: in molar parts, under the protection of nitrogen, 1 part of dibu...

Embodiment 2

[0030] A kind of synthetic method of flame-retardant unsaturated polyester resin raw material for FRP septic tank comprises the following steps:

[0031] S1. In terms of molar parts, mix 5 parts of maleic anhydride, 5 parts of saturated phthalic acid and 15 parts of diethylene glycol, and then heat up to melting at a rate of 5°C / min under nitrogen protection. Continue to heat up to 200°C, stir and react until the acid value of the system is lower than 25mgKOH / g, then cool down to 130°C to obtain an unsaturated polyester prepolymer;

[0032] S2, in parts by weight, add 10 parts of phosphorus-containing vinyl monomers, 0.2 parts of tert-butylcatechol, and 0.1 parts of dibenzoyl peroxide successively to 40 parts of unsaturated polyester prepolymers obtained in S1, and cool to room temperature to obtain the unsaturated polyester resin raw material;

[0033] The method for synthesizing the phosphorus-containing vinyl monomer includes: adding 2 parts of dibutylene glycol fumarate t...

Embodiment 3

[0035] A kind of synthetic method of flame-retardant unsaturated polyester resin raw material for FRP septic tank comprises the following steps:

[0036]S1. In terms of molar parts, after mixing 3 parts of fumaric acid, 6 parts of adipic acid, 4 parts of dipropylene glycol, and 4 parts of ethylene glycol, the temperature is raised to 7°C / min under nitrogen protection. Melt, continue to heat up to 180°C, then stir and react until the acid value of the system is lower than 25mgKOH / g, then cool down to 135°C to obtain an unsaturated polyester prepolymer;

[0037] S2, in parts by weight, sequentially add 15 parts of phosphorus-containing vinyl monomers, 0.1 parts of p-benzoquinone, 0.5 parts of 1,1-bis(tert-butyl peroxide) to 35 parts of the unsaturated polyester prepolymer obtained in S1 Oxygen) cyclohexane, is cooled to room temperature, obtains described unsaturated polyester resin raw material;

[0038] The method for synthesizing the phosphorus-containing vinyl monomer compr...

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Abstract

The invention discloses a synthetic method for a flame-retardant unsaturated polyester resin raw material applied to a glass fiber-reinforced plastic septic tank. The synthetic method comprises the following steps: uniformly mixing unsaturated diacid or an acid anhydride, saturated diacid or acid anhydride and dihydric alcohol, heating the obtained mixture under the protection of nitrogen gas until a molten state is reached, continuing heating, performing a stirring reaction until the acid value of a system is lower than 25 mgKOH / g, and lowering temperature to obtain an unsaturated polyester prepolymer; and sequentially adding phosphorus-containing vinyl monomer, a polymerization inhibitor and an initiator into the unsaturated polyester prepolymer, and carrying out cooling to room temperature so as to obtain the unsaturated polyester resin raw material. With the synthetic method for the flame-retardant unsaturated polyester resin raw material applied to the glass fiber-reinforced plastic septic tank in the invention, the synthesized unsaturated polyester resin raw material is effectively improved in flame retardancy while maintaining excellent processability and mechanical properties.

Description

technical field [0001] The invention relates to the technical field of polyester resins, in particular to a method for synthesizing flame-retardant unsaturated polyester resin raw materials for FRP septic tanks. Background technique [0002] Septic tank is an indispensable drainage treatment equipment in the field of construction. It is used to discharge domestic wastewater into municipal pipelines after primary treatment or into lower-level sewage treatment facilities for advanced treatment. In the early days, septic tanks were usually made of bricks, reinforced concrete or steel plates, but they all had obvious defects. In recent years, glass fiber reinforced plastic septic tanks have gradually been selected by most construction units. The scientific name of FRP is glass fiber reinforced plastic, and the septic tank storage tank made of FRP has the characteristics of strong corrosion resistance, no leakage, easy construction, and slow aging speed. The service life can reac...

Claims

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Application Information

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IPC IPC(8): C08F283/01C08F230/02C08G63/54C08G63/676C08G63/78
CPCC08F283/01C08G63/54C08G63/676C08G63/78C08F230/02
Inventor 周飞任旭明汤明明
Owner 安徽汇创新材料有限公司
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