Method for preparing polybutadiene-base water polyurethane and modified emulsion thereof

A technology of water-based polyurethane and polybutadiene, which is applied in the field of preparation of polybutadiene-based water-based polyurethane and its modified emulsion, can solve the problems of low stability and compatibility, and does not involve water-based products, and achieve mechanical Performance improvement, good low temperature resistance, good film forming effect

Inactive Publication Date: 2008-08-06
ANHUI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Chinese patent 94191523.9 proposes a filler slurry for polyolefin-based primers. Since the polyolefin is only blended with polyurethane, the polyolefin is not directly introduced into the polyurethane without chemical reaction, and the stability and compatibility are not high. shortcoming
[0003] Chinese patent 96112978.6 proposes a polyurethane-based resin adhesive adhesive that can satisfy both adhesion and durability to polyolefins, but this product is solvent-based and has environmental protection problems
[0004] A polyurethane elastomer based on polydiene polyol and castor oil with good cushioning properties prepared by Chinese patent 95104528.8 is used as a cushioning resin in multi-layer composite materials such as metal sandwich panels or coated panels, and has achieved good results. , but this formula is also solvent-based polyurethane, and there are also environmental problems
[0005] Chinese patent application CN1259155A provides a preparation method of a polyolefin / thermoplastic polyurethane composition prepared by a hydroxyl-terminated polydiene polymer, and the obtained polyolefin / thermoplastic polyurethane composition with good compatibility can be used for coatings and adhesives, but Does not involve water-based products

Method used

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  • Method for preparing polybutadiene-base water polyurethane and modified emulsion thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: Preparation of polybutadiene-based waterborne polyurethane and its modified emulsion

[0026] 1. Preparation of polybutadiene-based waterborne polyurethane

[0027] Weigh 16 grams of toluene diisocyanate, 30 grams of N-220 polyoxypropylene glycol after vacuum dehydration and 15 grams of hydroxyl-terminated polybutadiene liquid rubber after vacuum dehydration, add them to a 250ml three-necked flask, and react at a constant temperature of 85°C for 1 hour , followed by adding 2.8 grams of dimethylol propionic acid, reacting at a constant temperature of 85°C for 1 hour, and finally adding 3.4 grams of diethylene glycol, one drop of dibutyltin dilaurate and stannous octoate, 50ml of acetone, and reacting at a constant temperature of 60°C for 4 Hours later, cool down to 25°C and discharge to obtain a prepolymer, pour the prepolymer into a high-speed shear disperser, pour 2.8 g of triethylamine under the condition of 800 rpm, react for 1 minute, and then pour Ad...

Embodiment 2

[0032] Embodiment 2: the preparation of polybutadiene-based waterborne polyurethane

[0033]Weigh 21 grams of toluene diisocyanate, 30 grams of N-210 polyoxypropylene glycol after vacuum dehydration and 15 grams of hydroxyl-terminated polybutadiene liquid rubber after vacuum dehydration, add them to a 250ml three-necked flask, and react at 60°C for 3 hours Add 3.3 grams of dimethylolpropionic acid and react at 85°C for 1 hour; finally add 3.6 grams of diethylene glycol, 0.9 grams of trimethylolpropane, 2 drops of dibutyltin dilaurate, and 50 ml of acetone. After reacting at 70°C for 4 hours, cool down to 20°C and discharge to form a prepolymer. Pour the prepolymer into a high-speed shear disperser, pour 3g of triethylamine under the condition of 1000 rpm, and react 1 Minutes, then pour 140g of water and stir for 2 minutes to obtain a white water-based polyurethane emulsion with a solid content of 30%; the obtained water-based polyurethane emulsion is distilled off under reduce...

Embodiment 3

[0034] Embodiment 3: the preparation of polybutadiene-based waterborne polyurethane

[0035] Weigh 15 grams of isophorone diisocyanate, 10 grams of N-220 polyamide after vacuum dehydration and 20 grams of hydroxyl-terminated polybutadiene liquid rubber after vacuum dehydration, add them to a 250ml three-necked flask, and react at 90°C for 1 hour; Then add 2.4 grams of dimethylol propionic acid, react at 70°C for 2 hours, finally add 1.5 grams of ethylene glycol, one drop of dibutyltin dilaurate, stannous octoate, 55ml of acetone, react at 50°C for 5 hours, then cool down to 45 The prepolymer was obtained by discharging at ℃, and the prepolymer was poured into a high-speed shear disperser, and 1.8 g of triethylamine was poured under the condition of 2000 rpm, reacted for 0.5 minutes, and then poured into 130 g of water and stirred for 3 minutes , to obtain a white water-based polyurethane emulsion with a solid content of 35%; the obtained water-based polyurethane emulsion was d...

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Abstract

The invention discloses a polybutadiene aqueous polyurethane and a preparation method of relative modified emulsion, which is characterized by reacting low polymer polyatomic alcohol and hydroxy-terminated butadiene rubber and isocyanate, adding hydrophilic chain extender and catalyst to be reacted, cooling and emulsifying to obtain polybutadiene aqueous polyurethane, mixing polybutadiene aqueous polyurethane, emulsifier, water and inducer uniformly, adding ethenyl monomer to carry out emulsion polymerization to obtain polybutadiene aqueous polyurethane modified emulsion. The invention uses hydroxy-terminated butadiene rubber to synthesize aqueous polyurethane which can be modified by ethenyl to obtain environment-friendly, stable and low temperature resistant aqueous resin with better mechanical property. The resin can be used in weaving, leather processing, paint and adhesive or the like.

Description

technical field [0001] The invention belongs to the technical field of water-based polyurethane preparation methods, in particular to a preparation method of polybutadiene-based water-based polyurethane and a modified emulsion thereof. Background technique [0002] Chinese patent 94191523.9 proposes a filler slurry for polyolefin-based primers. Since the polyolefin is only blended with polyurethane, the polyolefin is not directly introduced into the polyurethane without chemical reaction, and the stability and compatibility are not high. shortcoming. [0003] Chinese patent 96112978.6 proposes a polyurethane-based resin adhesive adhesive that can meet both the adhesion and durability to polyolefins, but the product is solvent-based and has environmental protection problems. [0004] A polyurethane elastomer based on polydiene polyol and castor oil with good cushioning properties prepared by Chinese patent 95104528.8 is used as a cushioning resin in multi-layer composite mat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/69C08G18/10C08F290/06C08F2/24C08G18/83
Inventor 许戈文鲍俊杰钟达飞熊潜生
Owner ANHUI UNIVERSITY
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