Bi-component flame-retardant low-viscosity unsaturated polyester resin and preparation method thereof

A polyester resin, unsaturated technology, applied in the field of two-component flame-retardant low-viscosity unsaturated polyester resin and its preparation, can solve the problems of human health and coal mine safety hazards, non-flammability, flame-retardant viscosity, etc. To achieve the effect of adjustable curing time, preventing roof fall, and improving strength

Inactive Publication Date: 2011-09-14
TIANDI SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polyurethane grouting reinforcement materials have been widely used in coal mine grouting reinforcement projects due to their volume expansion and plastic deformation during solidification, but this type of material has high viscosity, difficulty in penetrating into the formation, and foaming when it meets water. Defects such as reduction, especially a large amount of unreacted isocyanate and catalysts have strong toxicity, which is harmful to human health and coal mine safety; urea-formaldehyde resin has the advantages of low price, flame retardancy and low viscosity, but its adhesive performance Poor, the strength of the consolidated body is low, and its compressive strength is less than 10MPa, and a large amount of formaldehyde escapes from the reinforcement area, polluting the environment and damaging human health
However, these materials have difficulty pumping and injecting into small crevices due to their high viscosity and the addition of granular fillers
Non-flammability also brings hidden dangers to coal mine safety
[0004] In short, the existing chemical grouting reinforcement materials cannot meet the grouting reinforcement requirements of broken coal and rock masses in some cases due to defects such as high viscosity, poor injectability, low strength, non-flammability, and harm to human health. , there is an urgent need for grouting reinforcement materials with low viscosity, high strength, flame retardancy and no harm to human health

Method used

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  • Bi-component flame-retardant low-viscosity unsaturated polyester resin and preparation method thereof
  • Bi-component flame-retardant low-viscosity unsaturated polyester resin and preparation method thereof
  • Bi-component flame-retardant low-viscosity unsaturated polyester resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A two-component flame-retardant low-viscosity unsaturated polyester resin is a polycondensation product of diols and dibasic acids or acid anhydrides. To prepare the unsaturated polyester resin, the reaction raw materials to be added and the quality of each raw material are as follows:

[0036]

[0037]

[0038] The preparation method is:

[0039]Mix ethylene glycol, propylene glycol, phthalic anhydride and maleic anhydride, slowly heat to 165°C to start polycondensation reaction (continuous heating process), and continue to heat up to 215°C, and react at this temperature until the acid value reaches When the temperature is 70mgKOH / g, add hydroquinone as a polymerization inhibitor, stir evenly and then cool down. When the temperature of the polycondensation product drops to 135°C, add it to the vinyl crosslinking agent (a mixture of styrene and divinylbenzene), and then add Trichloroethyl phosphate and mixed evenly to obtain the base material of unsaturated polyes...

Embodiment 2

[0043] A two-component flame-retardant low-viscosity unsaturated polyester resin is a polycondensation product of diols and dibasic acids or acid anhydrides. To prepare the unsaturated polyester resin, the reaction raw materials to be added and the quality of each raw material are as follows:

[0044]

[0045]

[0046] The preparation method is:

[0047] Put propylene glycol, tetrabromophthalic anhydride, a mixture of phthalic anhydride and maleic anhydride and triethanolamine together and heat slowly, gradually raise the temperature to 220°C, and keep it at this temperature until the acid value reaches 70mgKOH / g, add hydroquinone as a polymerization inhibitor, stir evenly and then cool down, when the temperature of the polycondensation product drops to 130-140°C, add it to the vinyl crosslinking agent (a mixture of styrene and divinylbenzene), stir The base material of unsaturated polyester resin can be obtained evenly. The unsaturated polyester resin prepared above wa...

Embodiment 3

[0051] A two-component flame-retardant low-viscosity unsaturated polyester resin is a polycondensation product of diols and dibasic acids or acid anhydrides. To prepare the unsaturated polyester resin, the reaction raw materials to be added and the quality of each raw material are as follows:

[0052]

[0053]

[0054] The preparation method is:

[0055] Mix ethylene glycol, propylene glycol, diethylene glycol, phthalic anhydride and maleic anhydride, heat up to 210°C and react at this temperature for 12 hours. When the acid value reaches 60mgKOH / g, add a polymerization inhibitor to Hydroquinone, stir evenly and then cool down. When the polycondensation product cools down to 120°C, add it to the vinyl crosslinking agent (a mixture of styrene and divinylbenzene), then add trichloroethyl phosphate, and stir evenly. Obtain the basic material of unsaturated polyester resin, measure the unsaturated polyester resin prepared above, and its resin viscosity is 45mPa·s. Take 100g...

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Abstract

The invention relates to bi-component flame-retardant low-viscosity unsaturated polyester resin and a preparation method thereof. The unsaturated polyester resin is prepared by undergoing a polycondensation reaction on dihydric alcohol and binary acid / acid anhydride. A cross-linking agent and a flame retardant are added in the reaction, so that the aims of lowering resin viscosity and enhancing material intensity and flame retardance are fulfilled, and the unsaturated polyester resin can be taken as a grouting reinforcement material for broken surrounding rocks and loose coal-rock masses in underground constructions such as mines and the like.

Description

technical field [0001] The invention belongs to the field of polymer materials, and relates to a low-viscosity chemical grouting reinforcement material and a processing technology thereof, in particular to a two-component flame-retardant low-viscosity unsaturated polyester resin and a preparation method thereof. Background technique [0002] In underground projects such as mines and tunnels, especially in coal mining projects, broken coal and rock masses and other surrounding rocks often need to be reinforced. The usual method is to use shed-type supports for support or use anchor rods and anchors The cables are combined with resin anchors for reinforcement and support. The resin anchoring agent generally uses resin cement composed of unsaturated polyester resin and fillers such as stone powder as the adhesive, benzoyl peroxide as the curing agent, and a mother-in-law bag made of polyester film as the packaging material, and is made into a medicine roll form. Patent US 4260...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/01C08K5/521
Inventor 康红普杨景贺韩国强冯志强
Owner TIANDI SCI & TECH CO LTD
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