A kind of two-component modified waterborne polyurethane flame retardant coating glue and its preparation method

A water-based polyurethane, two-component modification technology, applied in the direction of polyurea/polyurethane coatings, coatings, fireproof coatings, etc., can solve the problems of poor mechanical properties, foaming and falling off, not environmental protection, etc., to achieve thermal stability and Improved flame retardant performance, improved flame retardant performance and mechanical properties, good rub resistance and hand feeling

Active Publication Date: 2019-11-15
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The current water-based polyurethane adhesives generally have poor water resistance, alkali resistance, and temperature resistance. When the clothes they are attached to are placed in the washing machine and washed with washing powder, they will easily cause foaming and shedding, and some adhesives with good bonding strength are generally Oily polyurethane, not environmentally friendly
[0005] The Chinese invention patent application with the publication number CN 10059796A discloses a water-based polyurethane adhesive that uses an NCO-blocked diisocyanate-TMP system and adds a phospholipid flame retardant. improved, but its mechanical properties are poor, and phospholipids will inevitably emit unpleasant odors during processing, making it difficult to apply to high-end materials

Method used

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  • A kind of two-component modified waterborne polyurethane flame retardant coating glue and its preparation method
  • A kind of two-component modified waterborne polyurethane flame retardant coating glue and its preparation method
  • A kind of two-component modified waterborne polyurethane flame retardant coating glue and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0044] Take 10g of montmorillonite and 120mL of an aqueous solution with a mass fraction of 50% ethanol and mix them. After ultrasonic dispersion at room temperature for 0.5h, heat to 75°C and add 4g of dodecylbishydroxyethylmethylammonium chloride to the reaction system. , after reacting for 6 hours, cooling, centrifugal precipitation, repeated washing with absolute ethanol, and vacuum drying to obtain modified montmorillonite.

[0045] React 50g of HDI and 371g of polybutadiene diol with a molecular weight of 3000 at 75°C for 2.5h, then lower the temperature to 55°C, dissolve 3.2g of 1,4-butanediol in 50g of acetone and add dropwise for 20min, then continue After reacting for 1.5 h, then raising the temperature to 70° C., adding a mixed solution of 6 g of modified montmorillonite and 60 mL of N-methylpyrrolidone to react for 1.5 h to obtain a polyurethane prepolymer.

[0046] Add 550g of acetone to the modified polyurethane prepolymer to reduce the viscosity of the emulsion ...

Embodiment 2

[0052] Mix 10g of montmorillonite with 120mL of 50% ethanol aqueous solution, ultrasonically disperse at room temperature for 1h, heat to 70°C, add 3g of hexadecyl dihydroxyethylammonium bromide to the reaction system, and react for 8h Finally, cooling, centrifugal precipitation, repeated washing with absolute ethanol, and vacuum drying to obtain modified montmorillonite;

[0053] React 50g of IPDI and 225g of polycaprolactone diol with a molecular weight of 2000 at 80°C for 3h, then lower the temperature to 50°C, dissolve 4g of 2,3-butanediol in 60g of acetone and add dropwise for 30min, then continue the reaction for 2h, then After raising the temperature to 75°C, add a mixed solution of 9 g of modified montmorillonite and 80 mL of N-methylpyrrolidone to react for 1.5 h to obtain a polyurethane prepolymer;

[0054] Add 350g of acetone to the modified polyurethane prepolymer to reduce the viscosity of the emulsion into drops, then add 16.2g of 50% 1,4-butanediol-2-sodium sulf...

Embodiment 3

[0060] Mix 20g of montmorillonite and 120mL of 50% ethanol aqueous solution, ultrasonically disperse at room temperature for 0.5h, heat to 80°C, add 5g of dihydroxypropyl dimethyl dodecyl chloride to the reaction system ammonium, after reacting for 7 hours, cooling, centrifugal precipitation, repeated washing with absolute ethanol, and vacuum drying to obtain modified montmorillonite;

[0061] React 50g of 1,4-cyclohexane diisocyanate and 540g of polyadipate-1,4-butylene adipate diol with a molecular weight of 3000 at 75°C for 2 hours, then lower the temperature to 60°C, and 4.1g of 1,3 -Propylene glycol was dissolved in 60g of acetone and added dropwise for 15min, and then continued to react for 1.5h, then added a mixed solution of 12g of modified montmorillonite and 100mL of N-methylpyrrolidone to react for 2h after raising the temperature to 65°C to obtain a modified polyurethane prepolymer body;

[0062] Add 800g of acetone to the modified polyurethane prepolymer to reduc...

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Abstract

The invention discloses a preparation method of bi-component modified waterborne polyurethane flame-retardant coating adhesive. The preparation method includes the steps: firstly, grafting and modifying montmorillonoid by a quaternary ammonium salt intercalation agents containing dihydroxy to organize the inorganic montmorillonoid; adding polyisocyanate and low polymer polyalcohol into a reactiondevice to perform reaction, and then adding small molecule chain extenders for reaction and the modified montmorillonoid for modification; adding acetone to reduce viscosity, and adding hydrophilic chain extenders for reaction to obtain modified polyurethane prepolymer; adding water and performing high-speed shearing dispersion to obtain modified waterborne polyurethane dispersion; adding thickening agents and curing agents into the dispersion to obtain the bi-component modified waterborne polyurethane flame-retardant coating adhesive. The prepared high-solid-content modified adhesive has excellent flame resistance, mechanical property, thermal stability, adhesive property, water resistance and weather resistance, and the prepared bi-component modified waterborne polyurethane flame-retardant coating adhesive takes water as a solvent and is safe, environmentally friendly and excellent in performance and can be used for the field of flame-retardant fabrics.

Description

technical field [0001] The invention relates to a water-based polyurethane flame-retardant coating adhesive, in particular to a two-component modified water-based polyurethane flame-retardant coating adhesive and a preparation method thereof; the polyurethane flame-retardant coating adhesive has good flame retardancy and high temperature resistance , High adhesive performance characteristics. Background technique [0002] With the rapid development of petrochemical and textile industries, various fibers have emerged as the times require. Because fibers are easy to catch fire, the fires caused by textiles have been on the rise in recent years. Among them, bedding, decorative fabrics and clothing fabrics are the main causes of fire. reason. Therefore, at home and abroad attach great importance to the research of flame retardant textiles. [0003] Polyurethane, as a kind of adhesive that can be cured at room temperature, is generally favored by people for its excellent moldin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/14C09D175/06C09D175/08C09D5/18C08G18/38C08G18/32C08G18/12D06N3/14
CPCC08G18/12C08G18/3895C09D5/18C09D175/06C09D175/08C09D175/14D06N3/14D06N2203/068D06N2209/067D06N2209/103D06N2209/142C08G18/3857C08G18/3855
Inventor 傅和青宋蒙蒙周威胡剑峰
Owner SOUTH CHINA UNIV OF TECH
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