A kind of dibasic alcohol preparation method of modified polyurethane/unsaturated polyester resin

A technology of polyester diol and polyester resin, which is applied in the field of preparation of flexible unsaturated polyester diol, can solve the problems of high preparation cost, cumbersome and complicated operation, and achieves a controllable curing process and excellent product performance. Effect

Active Publication Date: 2016-04-13
CHANGZHOU XIAOGUO INFORMATION SERVICES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above methods are cumbersome, the product preparation cost is high, the operation is complicated, and there are compatibility problems

Method used

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  • A kind of dibasic alcohol preparation method of modified polyurethane/unsaturated polyester resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The aggregation steps are as follows:

[0021] 1. Preparation of polyester resin prepolymer:

[0022] Add propylene glycol and increase the temperature to 80°C; add isophthalic acid (molar ratio of diol to saturated dibasic acid is 1-1.05:1). The temperature is increased to 150°C within 1h, and then to 210°C at a heating rate of 10°C / h. Condensate and polymerize with nitrogen at 180°C for 3 hours. When the acid value is less than 20mgKOH / g, the temperature is reduced to 180°C.

[0023] 2. Preparation of flexible unsaturated polyester glycol:

[0024] Add 0.1 mole of hydroxyl-terminated polybutadiene with a molecular weight of 1200, 1.2 moles of diethylene glycol, and 1 mole of maleic anhydride (hydroxy-terminated flexible macromolecular diol: moles of diol and unsaturated dibasic acid The ratio is 0.1:1.2:1). The temperature is increased to 210°C at a heating rate of 10°C / h, and the hydroxyl-terminated polybutadiene and unsaturated polyester resin are copolymerized to form a...

Embodiment 2

[0028] The aggregation steps are as follows:

[0029] 1. Preparation of polyester resin prepolymer:

[0030] Add 1.03 moles of propylene glycol and raise the temperature to 80°C; add 1 mole of terephthalic acid (the molar ratio of diol and saturated dibasic acid is 1.03:1). The temperature is increased to 150°C within 1h, and then to 210°C at a heating rate of 10°C / h. Condensate and polymerize with nitrogen at 180°C for 3 hours. When the acid value is less than 20mgKOH / g, the temperature is reduced to 180°C.

[0031] 2. Preparation of flexible unsaturated polyester glycol:

[0032] Add again 0.2 moles of hydroxy-terminated styrene-butadiene liquid rubber with a molecular weight of 2000, 1.5 moles of diethylene glycol, and 1 mole of maleic anhydride (hydroxy-terminated flexible macromolecular diol: moles of diol and unsaturated dibasic acid The ratio is 0.2:1.5:1). The temperature is raised to 210°C at a heating rate of 10°C / h, and the hydroxy-terminated styrene-butadiene liquid rub...

Embodiment 3

[0036] The aggregation steps are as follows:

[0037] 1. Preparation of polyester resin prepolymer:

[0038] Add 1.05 mol of butanediol and increase the temperature to 80°C; add 1 mol of phthalic anhydride (the molar ratio of diol to saturated dibasic acid is 1.05:1). The temperature is increased to 150°C within 1h, and then to 210°C at a heating rate of 10°C / h. Condensate and polymerize with nitrogen at 180°C for 3 hours. When the acid value is less than 20mgKOH / g, the temperature is reduced to 180°C.

[0039] 2. Preparation of flexible unsaturated polyester glycol:

[0040] Add 0.15 moles of hydroxyl-terminated hydrogenated polybutadiene with a molecular weight of 1500, 1.4 moles of diethylene glycol, and 1 mole of maleic anhydride (hydroxy-terminated flexible macromolecular diols: diols and unsaturated dibasic acids The molar ratio is 0.15:1.4:1). The temperature is raised to 210°C at a heating rate of 10°C / h, and the hydroxyl-terminated hydrogenated polybutadiene is copolymeriz...

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Abstract

The invention relates to a modified polyurethane / unsaturated polyester resin dibasic alcohol preparation method belonging to the field of high molecular polymerization. By synthesizing flexible unsaturated polyester dibasic alcohol through multi-step polymerization, the flexible group proportion and the hydroxyl value are controllable; a flexible unsaturated polyester dibasic alcohol, isocyanate and diluter blending method is easy to implement in the production process; the curing process is controllable, and room-temperature curing can be realized; and modified polyurethane / unsaturated polyester resin cured products are excellent in performance. The invention can be widely used in industrial, agricultural and transportation occasions as well as some occasions of special applications.

Description

Technical field: [0001] The invention belongs to the field of polymer polymerization, and particularly relates to a method for preparing a flexible unsaturated polyester diol using a modified polyurethane / unsaturated polyester resin. Background technique: [0002] Unsaturated polyester resin (UPR) has excellent comprehensive properties and has a wide range of uses. It is one of the fastest growing types of thermosetting resins in recent years. However, UPR has the defect of greater brittleness, which limits its application range. Improving the toughness of UPR has become an important issue. The liquid rubber block is used to improve the fracture performance of UPR. Although this method improves the toughness of UPR, it has an adverse effect on its heat resistance, and the increase in viscosity affects the process performance of UPR. Through molecular design, adjusting the flexibility of the molecular chain can also achieve the purpose of toughening UPR resin, but it will also a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/68C08G63/676C08G63/685C08F283/00
CPCC08G18/683C08G63/676C08G63/6858
Inventor 张震乾吉祥王佩何剑虹
Owner CHANGZHOU XIAOGUO INFORMATION SERVICES
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