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Ditrimethylolpropane-based four-functionality polyurethane acrylate as well as preparation method and application thereof

A technology of polyurethane acrylate and ditrimethylolpropane, which is applied in the field of materials, can solve the problems of difficult control of the production process, many steps in the reaction process, and tediousness, and achieve the effects of easy control, reduced reaction steps, and low viscosity

Active Publication Date: 2016-08-24
JIANGSU LITIAN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the use of diisocyanate and hydroxyethyl acrylate or hydroxypropyl acrylate to prepare 4-functional polyurethane acrylate, the reaction process has many steps and is relatively cumbersome. The production process is not easy to control, and there is a risk of gelation due to the existence of side reactions.

Method used

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  • Ditrimethylolpropane-based four-functionality polyurethane acrylate as well as preparation method and application thereof
  • Ditrimethylolpropane-based four-functionality polyurethane acrylate as well as preparation method and application thereof
  • Ditrimethylolpropane-based four-functionality polyurethane acrylate as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 2503 grams of ditrimethylolpropane (CAS No. 23235-61-2, molecular formula C) was dropped into a 6L autoclave 12 h 26 o 5 , molecular weight 250.3318), 42 grams of sodium formate, warming up to 155 ° C, began to drop ethylene oxide (C 2 h 4O, molecular weight 44) 2200 grams of reaction, temperature control 155 ° C ~ 165 ° C, pressure 0.10 ~ 0.40 MPa, dropwise for 3 ~ 4 hours, after the drop is completed, 155 ° C ~ 165 ° C for 2 ~ 3 hours, and then cooled to 80 ° C Below, the crude product is obtained in discharging; after the crude product was added 45 grams of activated clay and stirred for 30 minutes, it was clear and transparent tetrahydroxypolyether (C 22 h 46 o 10 , molecular weight 470) 4608.5 grams, structure as shown in formula (I), wherein: n=2, a+b+c+d=5.

[0037] In the 1000mL four-necked flask, drop into the prepared tetrahydroxypolyether (C 22 h 46 o 10 , molecular weight 470) 235 grams, isocyanate ethyl acrylate 282.24 grams (2mol), catalyst dibuty...

Embodiment 2

[0042] 2503 grams of ditrimethylolpropane (CAS No. 23235-61-2, molecular formula C) was dropped into a 6L autoclave 12 h 26 o 5 , molecular weight 250.3318), 60 grams of potassium formate, warming up to 155 ° C, began to drop propylene oxide (C 3 h 6 O, molecular weight 58) 3480 grams of reaction, temperature control 155 ° C ~ 165 ° C, pressure 0.10 ~ 0.40 MPa, dropwise for 3 ~ 4 hours, after the drop is completed, 155 ° C ~ 165 ° C for 2 ~ 3 hours, and then cooled to 80 ° C Below, the crude product is obtained in discharging; after the crude product was added 60 grams of activated clay and stirred for 30 minutes, it was clear and transparent tetrahydroxypolyether (C 30 h 62 o 11 , molecular weight 598) 5860.3 grams, structure as shown in formula (I), wherein: n=3, a+b+c+d=6.

[0043] In the 1000mL four-necked flask, drop into the prepared tetrahydroxypolyether (C 30 h 62 o 11 , molecular weight 598) 299 grams, isocyanate ethyl acrylate 280 grams (1.984mol), catalyst ...

Embodiment 3

[0048] Refer to the preparation method of Example 1-2 in Chinese patent ZL201310143167.9 to prepare 4-functionality polyurethane acrylate, respectively as Comparative Example 1-2, to investigate the preparation method of Example 1-2 of the present invention and Comparative Example 1-2. Viscosity of 4-functionality urethane acrylate.

[0049] Test method: NDJ-1 rotary viscometer, No. 4 rotor, 60 rpm. Refer to "NDJ-1 Rotational Viscometer Instruction Manual" for specific operation steps.

[0050] Table 1 Viscosity of 4-functionality polyurethane acrylate

[0051]

Comparative example 1

Example 1

Comparative example 2

Example 2

viscosity

12000mPa.s@60℃

6400mPa.s@60℃

15000mPa.s@60℃

8100mPa.s@60℃

[0052] Compared with the product of Comparative Example 1, the viscosity of the product of Example 1 decreased by 5600mPa.s@60°C, and the decrease rate was 46.67%.

[0053] Compared with the product of Comparative Example 2, the vi...

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Abstract

The invention discloses ditrimethylolpropane-based four-functionality polyurethane acrylate as well as a preparation method and an application thereof. Low-viscosity four-functionality polyurethane acrylate is prepared with a method as follows: ditrimethylolpropane reacts with ethylene oxide or propylene oxide under the action of a catalyst, tetracarbonyl polyether is prepared and reacts with 2-isocyanatoethylacrylate, and four-functionality polyurethane acrylate is prepared. The invention further discloses an application of four-functionality polyurethane acrylate in preparation of an UV coating, paint or an adhesive. When ditrimethylolpropane is used for preparing polyurethane acrylate, the reaction process is simple and easy to control, gel is not easily produced due to side effects, and the polyurethane acrylate product has low viscosity and meets the requirements when used for a low-viscosity coating and an UV spray coating without a solvent or with few solvents. After low-viscosity four-functionality UV-curable polyurethane acrylate is cured, low-viscosity four-functionality UV-curable polyurethane acrylate has excellent performance of high hardness, wear resistance, scratching resistance, heat resistance, weather fastness and the like and can be applied as a raw material of the UV coating, the paint and the adhesive.

Description

technical field [0001] The invention belongs to the field of materials, and relates to a ditrimethylolpropane-based 4-functionality urethane acrylate and its preparation method and application, in particular to a ditrimethylolpropane-based low-viscosity 4-functionality urethane acrylate And its preparation method and application. Background technique [0002] With the rapid development of science and technology and the strict restrictions on solvents in environmental protection regulations, UV light-curable polymer materials have attracted more and more attention. UV light-curing materials have excellent properties such as fast curing, low energy consumption, less pollution, and high efficiency, so they are widely used in coatings, printing, and electronics industries, and have developed rapidly in recent years. Polyurethane acrylate (PUA) is an important light-curable oligomer, which has excellent properties such as low irritation, fast curing speed, high transparency, ten...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C269/02C07C271/16C09D4/02C09D4/06
CPCC07C41/03C07C269/02C09D4/06C07C43/11C07C271/16C08F283/01
Inventor 胡剑飞张丽丽傅鹏志
Owner JIANGSU LITIAN TECH