Environment protection polyurethane terrace self levelling paint varnish and preparing method

A polyurethane, environmentally friendly technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of not considering the self-leveling problem of coatings, production, construction workers and environmental hazards, and the effect is not obvious, etc., to enhance self-leveling. The effect of improving the leveling performance, shortening the dry time, and solving the problem of self-leveling

Inactive Publication Date: 2005-09-28
INST OF AQUATIC LIFE ACAD SINICA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] When diisocyanates react with polyols to produce adducts, or when diisocyanates are self-polymerized with tertiary amines and other catalysts to form isocyanurates, there are always unreacted free diisocyanates. The method of removal has been extraction (USP3 ,248,372), but this method requires repeated operations, which is very troublesome, and the effect is not very obvious
The invention does not take into account the self-leveling problem of the coating for the time being, and at the same time, the amount of xylene is too large and has not been removed, causing harm to production, construction workers and the environment

Method used

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  • Environment protection polyurethane terrace self levelling paint varnish and preparing method
  • Environment protection polyurethane terrace self levelling paint varnish and preparing method

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0044] The amount of raw materials is parts by weight

[0045] Toluene diisocyanate (TDI) 20.75

[0046] Polyether N210 33.60

[0047] (Molecular weight is 1000, hydroxyl value = 100±10KOHmg / g)

[0048] Xylene 40

[0049] Trimethylolpropane 5.15

[0050] Dibutyltin dilaurate 0.25

[0051] Antioxidant 0.25

[0052] In a four-neck round bottom flask equipped with a stirrer, a heating platform, a thermometer, a reflux condenser and an inert gas introduction tube, add xylene and polyether N210 according to the amount required, and heat to 100°C for dehydration for 6 hours. Then add trimethylolpropane, control the temperature at 145°C, stir, keep for 3 hours to fully dehydrate, cool to 55°C, add dibutyltin dilaurate and antioxidant, finally add toluene diisocyanate (TDI), exothermic Keep at 70°C for 4 hours. At this time, the mixed system should be colorless, transparent or light yellow. The temperature is raised to 140-146°C to reflux the solvent xylene and water to steam out. After co...

example 2

[0056] The amount of raw materials is parts by weight

[0057] Toluene diisocyanate (TDI) 25.5

[0058] Polyether N210 27.53

[0059] (Molecular weight is 1000, hydroxyl value = 100±10KOHmg / g)

[0060] Xylene 30.0

[0061] Butyl acetate 10.0

[0062] Trimethylolpropane 6.47

[0063] Dibutyltin dilaurate 0.25

[0064] Antioxidant 0.25

[0065] In a four-neck round bottom flask equipped with a stirrer, a heating platform, a thermometer, a reflux condenser and an inert gas introduction tube, add xylene, butyl acetate, and polyether N210 according to the amount required, and heat to 100°C for dehydration for 6 hours. Then add trimethylolpropane, control the temperature at 145°C, stir, keep for 3 hours to fully dehydrate, cool to 55°C, add dibutyltin dilaurate and antioxidant, finally add toluene diisocyanate (TDI), exothermic Keep at 70°C for 4 hours. At this time, the mixed system should be colorless, transparent or light yellow. The temperature is raised to 140-146°C to reflux the s...

example 3

[0068] The amount of raw materials is parts by weight

[0069] Toluene diisocyanate (TDI) 24.8

[0070] Polyether N210 21.1

[0071] (Molecular weight is 1000, hydroxyl value = 100±10KOHmg / g)

[0072] Xylene 50.0

[0073] Trimethylolpropane 3.90

[0074] Dibutyltin dilaurate 0.1

[0075] Antioxidant 0.05

[0076] Benzoyl chloride 0.05

[0077] In a four-neck round bottom flask equipped with a stirrer, a heating platform, a thermometer, a reflux condenser and an inert gas introduction tube, add xylene and polyether N210 according to the amount required, and heat to 100°C for dehydration for 6 hours. Then add trimethylolpropane, control the temperature at 145°C, stir, keep for 3 hours to fully dehydrate, cool to 55°C, add dibutyltin dilaurate and antioxidant, finally add toluene diisocyanate (TDI), exothermic Add benzoyl chloride slowly at 70°C and keep it for 4 hours. At this time, the mixed system should be colorless, transparent or light yellow. The temperature is raised to 140-1...

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PUM

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Abstract

The polyurethane paint varnish consists of toylene diisocyanate, polyether N210, trimethylolpropylene, xylene, butyl acetate, dibutyltin dilaurate, benzoyl chloride and antioxidant. The preparation process includes dewatering of xylene and polyether N210 in a reactor; heating trimethylolpropane in the reactor while stirring to dewater and adding dibutylin dilaurate; adding tolyene diisocyanate, dropping benzoyl chloride for reaction for some period and transferring the prepolymer into paint cylinder; and adding other compounds to obtain the paint varnish. The present invention has simple technological process, the paint has low viscosity, high adhering force, high wear resistance, high weather resistance, high chemical corrosion resistance and no pollution.

Description

Technical field [0001] The invention relates to an environmentally-friendly polyurethane paint varnish, more specifically to an environmentally-friendly polyurethane floor self-leveling paint varnish, which is suitable for various substrate floors (such as offices, rooms, sports venues, roads, etc.), wood, plastics Decoration and protection. The invention also relates to a preparation method of paint varnish. Background technique [0002] Although coating factories have been producing polyurethane coatings for many years, they have ignored the harm of free diisocyanate and isocyanate (-NCO) in the prepolymer to human health. The literature describes the toxicity of the rat (Rats) test: [0003] Isocyanate LD 50 LC 50 Concentration in the air [0004] μg / kg μg / m 3 ppm(STP) [0005] TDI 5800 110 19.6 [0006] HDI 710 150 6.8 [0007] IPDI >2500 123 0.34 [0008] MDI >31600 370 0.1 [0009] From the above, LD 50 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D7/12C09D175/08
Inventor 刘剑彤吴永红
Owner INST OF AQUATIC LIFE ACAD SINICA
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