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Polyester polyol as well as preparation method and application thereof

A polyester polyol and polyol technology, applied in the field of polyester polyol and its preparation, can solve the problems of harsh production environment, limited product performance, etc., and achieve the effects of long service life, strong crystallinity and cost saving

Active Publication Date: 2014-03-19
SHANDONG INOV POLYURETHANE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polyurethane elastomers prepared from adipic acid polyester polyols are suitable for products with a Shore hardness below 95A. For high-hardness products, it is necessary to increase the amount of free isocyanate to increase the hardness. Too much free isocyanate will easily lead to harsh production environments and Product performance limitations

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Add 4672Kg of adipic acid, 5312Kg of terephthalic acid, 4992Kg of ethylene glycol, 1.5Kg of catalyst tetrabutyl titanate to the reaction kettle; seal the kettle with nitrogen, heat it to 140°C and control the reflux tower top temperature at 101°C to Heating rate per hour at 10℃ to 220℃, react at 220℃ for 3h, when the water output rate reaches more than 90%, control the water output rate to 200Kg / h, turn on the vacuum pump to vacuum until the acid value drops below 1.0mgKOH / g , Prepared a polyester polyol with a hydroxyl value of 113.18mgKOH / g and an acid value of 0.30mgKOH / g, using it and TDI-100 to synthesize a prepolymer with an isocyanate content of 6.2% by weight, and the prepolymer It reacts with MOCA in a mass ratio of 100:17.7 to obtain a polyurethane elastomer.

[0023] The performance is as follows: hardness 69D, rebound 37%, tear strength: 195.58KN / m, DIN wear: 43.23mm 3 , And the performance of polyurethane elastomer made of polyester polyol synthesized with adi...

Embodiment 2

[0025] Add 3776Kg of succinic acid, 666.3Kg of terephthalic acid and 3109Kg of ethylene glycol to the reaction kettle. The catalyst is 0.13Kg of tetrabutyl titanate; the kettle is sealed with nitrogen, and the reflux tower top temperature is controlled at 102°C after heating to 145°C. , Heat up to 222±2℃ at a heating rate of 15℃ per hour, react for 2.5h at 222±2℃, when the water output rate reaches 90% or more, control the water output rate to 1200Kg / h, turn on the vacuum pump to vacuum to the acid value Decrease below 1.0mgKOH / g, temperature? A polyester polyol with a hydroxyl value of 112.90mgKOH / g and an acid value of 0.29mgKOH / g was prepared, and a prepolymer with an isocyanate content of 4.5% by weight was synthesized with MDI-100. BDO reacts according to the mass ratio of 100:4.6 to obtain polyurethane elastomer.

[0026] The performance is as follows: hardness 49D, rebound 34%, tear strength: 152.38KN / m, DIN abrasion: 40.77mm 3 , And the performance of polyurethane elasto...

Embodiment 3

[0028] Add 1332Kg of adipic acid, 7548Kg of terephthalic acid, and 6216Kg of butanediol to the reaction kettle. The catalyst is 0.35Kg of stannous octoate; the kettle is sealed with nitrogen, and the temperature of the reflux tower top is controlled at 101°C after heating to 140°C. The heating rate per hour is increased to 223℃, and the reaction is carried out at 223℃ for 4 hours. When the water output rate reaches 90% or more, the water output rate is controlled to 1000Kg / h, and the vacuum pump is turned on to vacuum until the acid value drops below 1.0mgKOH / g. A polyester polyol with a hydroxyl value of 76.02mgKOH / g and an acid value of 0.37mgKOH / g was prepared, and a prepolymer with an isocyanate content of 3.6% by weight was synthesized with liquefied MDI. The prepolymer was combined with E -300 reacts according to the mass ratio of 100:6.87 to obtain polyurethane elastomer.

[0029] The performance is as follows: hardness 77D, rebound 39%, tear strength: 219.37KN / m, DIN wear...

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Abstract

The invention belongs to the technical field of novel chemical material synthesis and application and relates to polyester polyol as well as a preparation method and an application thereof. The preparation method comprises the steps: adopting binary acid and polyol, in the presence of a catalyst, and carrying out polycondensation on the binary component and the polyol component to produce the polyester polyol, wherein the mass ratio of the binary, the catalyst and micromolecule polyol is 100:(0.003-0.015):(50-100); and carrying out synthesis on the polyester polyol and isocyanate to obtain a prepolymer, and carrying out reaction on the isocyanate and a chain extender to obtain a polyurethane elastomer, wherein the weight content of isocyanato in the prepolymer is 2.1-28 percent. The polyester polyol is strong in the polyurethane elastomer rigidity, good in the rebound force, good in the abrasive resistance, strong in the bearing capacity, strong in the tear strength, and long in the service life. With the adoption of the polyurethane elastomer, as the crystallinity is strong and the high temperature resistance is good, the freeness of diisocyanate is reduced, the working environment is improved, the environmental pollution is alleviated, and the cost is saved.

Description

Technical field [0001] The invention belongs to the technical field of synthesis and application of new chemical materials, and relates to a polyester polyol and a preparation method and application thereof. Background technique [0002] Polyester polyol is one of the most important raw materials for polyurethane elastomer. The polyurethane elastomer material prepared by reacting with diisocyanate has the characteristics of good abrasion resistance, high resilience, and good solvent resistance. It is used in casters and solvent resistant adhesives. Rollers, industrial belts, mine screens and other fields have been widely used. Currently, polyester polyols for polyurethane elastomers are mostly prepared by the reaction of adipic acid with ethylene glycol, butylene glycol, propylene glycol, trimethylolpropane, and diethylene glycol. Polyurethane elastomers prepared from adipic acid polyester polyols are suitable for products with a Shore hardness below 95A. For high-hardness produ...

Claims

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Application Information

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IPC IPC(8): C08G63/127C08G63/78C08G18/76C08G18/42C08G18/32C08G18/10C08G18/48
Inventor 贾雪芹高振胜陈海良董良代金辉肖磊
Owner SHANDONG INOV POLYURETHANE
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