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Liquid polyester polyol for polyurethane coating and its preparation method and application

A polyester polyol and polyurethane coating technology, applied in the field of polyurethane materials, can solve the problems of mixed dibasic acid structure, high purification cost, ineffective utilization of mixed dibasic acid, etc., so as to improve the effective utilization rate and reduce the Environmental pollution, low cost effect

Active Publication Date: 2020-10-23
SHANDONG INOV POLYURETHANE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the complex structure and composition of mixed dibasic acids, the purification cost is high, and the mixed dibasic acids have not been effectively used at present.

Method used

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  • Liquid polyester polyol for polyurethane coating and its preparation method and application
  • Liquid polyester polyol for polyurethane coating and its preparation method and application
  • Liquid polyester polyol for polyurethane coating and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 1mol of mixed dibasic acid, 1.15mol of 1,2-propanediol, 0.05% by weight of tetrabutyl titanate, 0.02% by weight of TNP, and 0.3% by weight of antioxidant 1010 were put into the reactor, Under a nitrogen atmosphere, heat up to 180°C and keep the temperature constant for 4 hours. At this time, the esterification water yield of the system reaches 96% of the theoretical value; continue to raise the temperature of the system to 200°C, gradually vacuumize the system, and gradually increase the vacuum degree , keep the top temperature of the system at 83±3°C, keep the liquid distilling out in the secondary condenser until the acid value of the system is less than 2.0mgKOH / g, increase the vacuum, keep the top temperature at 96±2°C, and the hydroxyl value of the system When the temperature reaches about 56mgKOH / g, lower the temperature; when the system temperature drops to 140°C, add 0.2% T9 catalyst. When the temperature of the system is lowered to 60°C, discharge the materials...

Embodiment 2

[0040] Mix 1 mol of dibasic acid, 0.33 mol of 2-methyl-1,3-propanediol, 0.77 mol of 1,4-butanediol, 0.04% by weight of tetraisopropyl titanate, 0.05% by weight of The antioxidant 264 of TPP, 0.1% mass fraction is put into the reaction kettle, under nitrogen atmosphere, heat up to 180 ℃, constant temperature 6h, at this moment, system esterification water yield reaches 98% of theoretical value; Continue to heat up the system to 210°C, gradually vacuumize the system, and gradually increase the vacuum degree gradually, maintain the top temperature of the system at 93±3°C, and keep liquid distilling out of the secondary condenser until the acid value of the system is less than 2.0mgKOH / g , increase the vacuum degree, keep the top temperature at 100±2°C, stop vacuuming and lower the temperature when the hydroxyl value of the system reaches about 45mgKOH / g; when the system temperature drops to 130°C, add 0.5% T9 catalyst and continue stirring . When the temperature of the system is...

Embodiment 3

[0043] Mix 1mol of dibasic acid, 0.6mol of neopentyl glycol, 0.48mol of 1,6-hexanediol, 0.1% by weight of tetrabutyl titanate, 0.1% by weight of TBP, 0.5% by weight of Put the antioxidant 1076 into the reaction kettle, heat up to 180°C under nitrogen atmosphere, and keep the temperature constant for 3 hours. At this time, the esterification water yield of the system reaches 95% of the theoretical value; continue to raise the temperature of the system to 220°C, and gradually improve the system Vacuumize, and gradually increase the vacuum degree, maintain the top temperature of the system at 98±3°C, keep liquid distilling out of the secondary condenser until the acid value of the system is less than 2.0mgKOH / g, increase the vacuum degree, and maintain When the top temperature is 104±2°C and the hydroxyl value of the system reaches about 38mgKOH / g, stop vacuuming and lower the temperature; when the system temperature drops to 1500°C, add 0.4% T12 catalyst and continue stirring. W...

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Abstract

The invention belongs to the technical field of polyurethane materials, and in particular relates to liquid polyester polyol for a polyurethane coating and a preparation method and an application thereof. The raw materials comprise a mixed binary acid, a mixed small molecular dihydric alcohol, a catalyst and an antioxidant. The feeding molar ratio of the mixed binary acid and the mixed small molecular dihydric alcohol is 1: (1.05-1.2); the mixed binary acid is an adipic acid byproduct mixed binary acid. By considering synthesis of the raw materials the small molecular binary acid and the smallmolecular dihydric alcohol of polyester polyol, the small molecular binary acid is the mixed binary acid and the small molecular dihydric alcohol is more than two dihydric alcohols, and one of the dihydric alcohols needs to contain branch chain structures. The prepared polyester polyol structure has a degree of randomness and is relatively high in asymmetry from structure. Furthermore, the obtained polyester is hard to crystallize or is not crystallized and is in a liquid state at constant temperature or low temperature, so that a good flowing property is kept. Preparation of the primary agent component in the double component polyurethane coating is facilitated, and the basic demands on stability, flowability and the like are met.

Description

technical field [0001] The invention belongs to the technical field of polyurethane materials, and in particular relates to a liquid polyester polyol for polyurethane coatings and a preparation method and application thereof. Background technique [0002] Polyurethane coating, also commonly known as polyurethane paint, is a commonly used polyurethane material, which can usually be divided into two-component and one-component polyurethane coatings. Among them, the two-component polyurethane coating refers to a solvated polyurethane resin component with active hydroxyl groups (also known as the main agent component) and a low molecular weight isocyanate prepolymer component (also known as the curing agent component). 1. After the glue is applied, the active hydroxyl group on the main agent component and the active isocyanate group on the curing agent component are cured to prepare the corresponding coating and form the downstream application material. Generally, two-component...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/16C08G63/85C08G18/42C09D175/06
CPCC08G18/4238C08G63/16C08G63/85C09D175/06
Inventor 刘广臣杨苹苹张宾张兴华
Owner SHANDONG INOV POLYURETHANE
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