Flame-retardant heat-resistance polyurethane resin and preparation method of aqueous emulsion of polyurethane resin

A technology of polyurethane resin and water emulsion, applied in the direction of polyurea/polyurethane coating, polyurea/polyurethane adhesive, adhesive type, etc.

Active Publication Date: 2013-08-14
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the disadvantages of low heat resistance and low mechanical properties such as paint film hardness in the prior art of water-based polyurethane resin, while the existing flame-retardant water-based Polyurethane has the problem of adding a halogen flame retardant to generate toxic gas and a large amount of smoke. The invention provides a flame-retardant and heat-resistant polyurethane resin, which is high-performance, environmentally friendly, halogen-free and flame-retardant; in addition, the invention also provides flame-retardant and heat-resistant polyurethane The preparation method of resin water emulsion has simple process and easy operation

Method used

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  • Flame-retardant heat-resistance polyurethane resin and preparation method of aqueous emulsion of polyurethane resin
  • Flame-retardant heat-resistance polyurethane resin and preparation method of aqueous emulsion of polyurethane resin
  • Flame-retardant heat-resistance polyurethane resin and preparation method of aqueous emulsion of polyurethane resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Add polyether polyol, FRC-6, a small amount of dibutyltin dilaurate and dimethylol propionic acid into a reactor with mechanical stirring and reflux condensation, stir and dissolve, add TDI, and 2 React at 40° C. for 1 h under protection, and add heterocyclic polyol B to obtain a prepolymer. Then drop to room temperature and add methyl ethyl ketone, add appropriate amount of triethylamine to neutralize. Add water to fully emulsify, remove methyl ethyl ketone by rotary evaporation, and obtain a flame-retardant heterocyclic polyurethane emulsion with a solid content of 30%, lay a film, and cure at 60°C. The limiting oxygen index LOI is 28.

[0045] Prepare the aqueous emulsion and carry out the following tests:

[0046] Infrared spectrum test: FTIR-430 Spectrometer produced by Japan JASCO Company was used to test the infrared spectrum of polyurethane foam plastics by film reflection or potassium bromide tablet method.

[0047] The limiting oxygen index is tested acco...

Embodiment 2

[0053] Add polyether polyol, Fyrol-6, a small amount of dibutyltin dilaurate, dimethylol propionic acid and a small amount of N,N-dimethylacetamide into a reactor with mechanical stirring and reflux condensation, stir and dissolve, add TDI, in N 2 React at 60°C for 4 hours under protection, and add heterocyclic polyol B to obtain a prepolymer. Then drop to room temperature and add acetone, and add appropriate amount of triethylamine to neutralize. Add water to fully emulsify, remove acetone by rotary evaporation, and obtain a flame-retardant heterocyclic polyurethane emulsion with a solid content of 35%, lay a film, and cure at 70°C. The limiting oxygen index LOI is 28.

Embodiment 3

[0055] Add heterocyclic polyol A, MDI and a small amount of N-methylpyrrolidone into a reactor with mechanical stirring and reflux condensation, stir and heat to dissolve, rise to 60°C for 1 hour. Add polyester polyol, FRC-6, a small amount of dibutyltin dilaurate and dimethylolpropionic acid and stir to dissolve. 2 React at 70°C for 4 hours under protection to obtain a prepolymer. Then drop to room temperature and add acetone, and add appropriate amount of triethylamine to neutralize. Add water to fully emulsify, remove acetone by rotary evaporation, and obtain a flame-retardant heterocyclic polyurethane emulsion with a solid content of 40%, lay a film, and cure at 80°C. The limiting oxygen index LOI is 28.

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Abstract

The invention belongs to the field of high molecular materials and in particular relates to flame-retardant heat-resistance polyurethane resin. The resin structure contains a residue structure obtained after reaction of heterocyclic polyol A, flame-retardant polyol and polyisocyanate, and the resin is obtained by adding heterocyclic polyol B as a crosslinking agent at the post phase of polyurethane synthesis. The flame-retardant heat-resistance polyurethane resin and an aqueous emulsion thereof are prepared by carrying out a reaction on heterocyclic polyol, polyester or polyester polyol, flame-retardant polyol, polyisocyanate and the like. As the heterocyclic structure is introduced in a polyurethane molecule chain, except for the characteristics of the common polyurethane paint coating, the flame-retardant heat-resistant polyurethane resin further has excellent heat resistance, corrosion resistance and high mechanical strength and mechanism performance and is high-grade flame-retardant polyurethane aqueous resin. The defects of the existing polyurethane coating in terms of heat resistance and mechanical property are overcome; and the prepared flame-retardant heat-resistance polyurethane resin has the advantages of intrinsic flame retardance, high heat resistance, large hardness, excellent mechanical property and high cost performance, is convenient to use and can be dried at low temperature.

Description

[0001] technical field [0002] The invention belongs to the technical field of macromolecular materials, and relates to water-based polyurethane resin, and also relates to a polyurethane resin water emulsion and a preparation method thereof. Background technique [0003] Polyurethane has high adhesion to metal, plastic, rubber, wood, etc., and excellent wear resistance, temperature resistance, scratch resistance, solvent resistance, radiation resistance, low temperature elasticity, excellent mechanical properties and molecular design, and is widely used in Foam plastics, rubber, fibers, coatings, inks, adhesives, leather and other fields. Most polyurethanes are flammable materials. In order to protect people's lives and properties, the development of flame-retardant polyurethanes has become a hot topic in recent years. At present, the purpose of flame retardant is mainly achieved by adding flame retardants, but small molecule flame retardants have disadvantages such as eas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/32C08G18/42C08G18/48C09D175/04C09J175/04C09D11/00C09D11/102
Inventor 朱秀玲吴红菊
Owner DALIAN UNIV OF TECH
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