Preparation of aqueous polyurethane fluid dispersion used with expansion type flame retardant

An intumescent flame retardant and water-based polyurethane technology, applied in polyurea/polyurethane coatings, coatings, textiles and papermaking, etc., can solve problems such as poor air permeability, poor heat resistance, and easy to become brittle, and achieve good film-forming properties , durable flame retardant, strong adhesion effect

Inactive Publication Date: 2011-06-08
DONGHUA UNIV +1
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Intumescent coating adhesive is the most widely used flame-retardant coating adhesive at home and abroad, but it generally has poor heat resistance, high temperature, easy to stick, and easy to stick to dust.
Easy to become brittle at low temperature, poor air permeability and other disadvantages

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation of aqueous polyurethane fluid dispersion used with expansion type flame retardant
  • Preparation of aqueous polyurethane fluid dispersion used with expansion type flame retardant
  • Preparation of aqueous polyurethane fluid dispersion used with expansion type flame retardant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Add 1mol of PEG800 to the reaction vessel, distill under reduced pressure (vacuum degree 67mmHg) at 100°C for 1h, add 1.1mol of TDI (toluene-2,4-diisocyanate), and react for 2.5h under nitrogen protection; lower the temperature and Add acetone accounting for 30% of the volume of the reaction system to dilute the prepolymer dilution; add 4% succinic acid to the prepolymer, and react at 60°C for 2 hours; lower the temperature to below 40°C, and slowly add a certain amount of pro- Water chain extender N-methyldiethanolamine 7% and (accounting for 30% of the volume of the reaction system) acetone, keep the temperature at 40 ° C for 30 minutes; add acetic acid for neutralization, and then slowly add to the entire system under strong stirring 50% by weight of deionized water, and quickly disperse evenly, and adjust the pH value of the system between 6-7. Then the solvent therein is removed by distillation under reduced pressure to obtain a stable water-based polyurethane disp...

Embodiment 2

[0020] Add 1mol of PEG1000 to the reaction vessel, distill under reduced pressure (vacuum degree 67mmHg) at 100°C for 1h, add 1.2mol of TDI (toluene-2,4-diisocyanate), and react for 3h under nitrogen protection; lower the temperature and Add acetone accounting for 40% of the volume of the reaction system to dilute to obtain a prepolymer dilution; add 5% succinic acid to the prepolymer, and react at 60°C for 2 hours; lower the temperature to below 40°C, and slowly add a certain amount of pro- Water chain extender diethanolamine 7% and (accounting for 30% of the volume of the reaction system) acetone, keep the temperature at 40 ° C for 30 minutes; add acetic acid for neutralization, and then slowly add 60% by weight of the entire system under strong stirring. Ionized water, and quickly dispersed evenly, adjust the pH value of the system between 6-7. Then the solvent therein is removed by distillation under reduced pressure to obtain a stable water-based polyurethane dispersion, ...

Embodiment 3

[0022] Add 1mol of PEG 2000 to the reaction vessel, distill under reduced pressure (vacuum degree 67mmHg) at 100°C for 1h, add 1.3mol of TDI (toluene-2,4-diisocyanate), and react for 3h under nitrogen protection; lower the temperature And add acetone accounting for 50% of the volume of the reaction system to dilute to obtain a prepolymer dilution; add 6% succinic acid to the prepolymer, and react at 60°C for 2h; lower the temperature to below 40°C, and slowly add a certain amount of Hydrophilic chain extender trimethylolpropane 9% and (accounting for 30% of the volume of the reaction system) acetone, keep the temperature at 40 ° C for 30 minutes; add acetic acid for neutralization, and then slowly add to the entire system under strong stirring 70% by weight of deionized water, and quickly disperse evenly, and adjust the pH value of the system between 6-7. Then the solvent therein is removed by distillation under reduced pressure to obtain a stable water-based polyurethane disp...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a method for preparing waterborne polyurethane dispersion liquid used in matching with intumescent flame retardant. The method comprises the following steps: (1) 1mol to 2 mol of polyethylene glycol is added to a reaction vessel, decompressed, distilled and added with toluene-2,4-diisocyanate, and then the materials are cooled, diluted with acetone, so as to prepare prepolymer diluent; and (2) succinic acid is added to prepolymer; the succinic acid and the prepolymer react for 2 to 3 hours at a temperature between 60 and 80 DEG C; hydrophilic chain extender and the acetone are slowly added; the materials are thermally insulated, react at 40 DEG C, and are added with acetic acid for neutralization, stirred and simultaneously added with deionized water and uniformlydispersed; the pH value of a system is regulated to be between 6 and 7; and then a solvent in the system is decompressed and distilled. Waterborne polyurethane flame-retardant coating adhesive prepared from the polyurethane dispersion liquid of the invention has the advantages of non-combustible property, little pollution and low cost, has high adhesivity to fabric, good film-forming property andhigh strength, and can help the fabric to achieve durable flame retardance after film formation.

Description

technical field [0001] The invention belongs to the field of flame-retardant finishing, and in particular relates to a preparation method of a water-based polyurethane dispersion matched with an intumescent flame retardant. Background technique [0002] The intumescent flame retardant system generally includes three parts, namely the carbon source (char forming agent, which is the basis for forming the foam carbonization layer, mainly polyols with high carbon content and triazines, such as pentaerythritol, octane Amyl alcohol, starch, hydroxyl-containing organic resins, etc.), acid sources (dehydrating agents, generally inorganic acids or compounds that can generate inorganic acids when heated at 100-250 ° C, such as phosphoric acid, boric acid, various phosphates, phosphate esters, etc.) , Air source (foaming source, the commonly used foaming source is generally melamine, bisphenol amine, polyphosphoric acid and other nitrogen-containing compounds). They form the carbon la...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & AuthorityPatents(China)
IPC IPC(8): C08G18/66C08G18/10C09D175/08C09D5/18D06M15/568
Inventor蔡再生姜仲苏丁佩佩葛凤燕张瑜曾履平石川哲也陈国伟
OwnerDONGHUA UNIV