Preparation method of polyurethane for coating film formation

A polyurethane and film-forming technology, used in polyurea/polyurethane coatings, coatings, etc., can solve the problem of high toxicity of isocyanates, and achieve the effects of safe production operation, low cost, environmental protection, and excellent adhesion

Inactive Publication Date: 2018-07-17
FUJIAN LONGSHANG MICROFIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Therefore, aiming at the above contents, the present invention provides a method for preparing polyurethane for coating and film formation, which solves the problem of high toxicity of isocyanate in the existing polyurethane preparation process.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A preparation method for coating film-forming polyurethane, comprising the following steps:

[0031] 1) Make soybean oil cyclic carbonate from epoxidized soybean oil: add 100 parts by weight of epoxidized soybean oil and 4.8 parts by weight of catalyst into the reaction kettle, then pass in carbon dioxide gas, and after three times of ventilation, the reaction temperature is 100°C , the reaction pressure is 1MPa, start to react 40h under the effect of stirring, stop feeding carbon dioxide gas and stop feeding carbon dioxide gas at the end of reaction, obtain cyclic carbonate; The carbon dioxide gas volume fraction is 99.99%, and the catalyzer is 1.8 weight Parts of zinc chloride, 1 part by weight of zinc bromide, and 2 parts by weight of tetrabutylammonium bromide are compounded;

[0032] 2) Configure aminosiloxane hydrolyzate: mix 20 parts by weight of aminopropyltriethoxysilane, 10 parts by weight of water, and 70 parts by weight of ethanol, and hydrolyze aminopropylt...

Embodiment 2

[0035] A preparation method for coating film-forming polyurethane, comprising the following steps:

[0036] 1) Make soybean oil cyclic carbonate from epoxidized soybean oil: add 100 parts by weight of epoxidized soybean oil and 5 parts by weight of catalyst into the reaction kettle, then pass in carbon dioxide gas, and after three times of ventilation, the reaction temperature is 140°C , the reaction pressure is 10MPa, start to react 30h under the effect of stirring, stop feeding carbon dioxide gas and stop feeding carbon dioxide gas at the end of reaction, obtain cyclic carbonate; Described carbon dioxide gas volume fraction is 99.99%, and described catalyzer is NaI and The DMF solvent is a homogeneous solution made of 1:100 parts by weight. After the reaction is completed, the excess gas is vented, and the solvent is removed by distillation under negative pressure. When it is lower than the critical pressure of carbon dioxide (7.38MPa), the pressure has no contribution to th...

Embodiment 3

[0040]A preparation method for coating film-forming polyurethane, comprising the following steps:

[0041] 1) Make soybean oil cyclic carbonate from epoxidized soybean oil: add 100 parts by weight of epoxidized soybean oil and 3 parts by weight of catalyst cobalt oxide into the reactor, then feed carbon dioxide gas, and after three times of ventilation, the reaction temperature is at 120°C, the reaction pressure is 8MPa, and the reaction starts under the action of stirring. During the reaction, the infrared spectrum is used to monitor and judge the reaction progress. When the C-O characteristic peaks of epoxy at 1 and 845cm-1 decrease and disappear, it indicates that the reaction is complete and the reaction is terminated;

[0042] 2) Configure aminosiloxane hydrolyzate: mix 20 parts by weight of aminopropyltriethoxysilane, 10 parts by weight of water, and 70 parts by weight of ethanol, and hydrolyze aminopropyltriethoxysilane to obtain polyaminoorganosiloxane alkane solution...

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PUM

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Abstract

The invention relates to the field of high polymer material application, and provides a preparation method of polyurethane for coating film formation. The method comprises the following steps of 1, manufacturing epoxidized soybean oil into cyclic-carbonated soybean oil; 2, preparing an amino siloxane hydrolysate; 3, synthesizing nonisocyanate polyurethane. The polyurethane can replace isocyanate polyurethane as film forming materials of surface coatings of synthetic leather, spinning, furniture and the like, and the problem that the toxicity of adopted isocyanate is large in the existing polyurethane preparation process is solved.

Description

technical field [0001] The invention relates to the field of polymer material synthesis, in particular to a method for preparing polyurethane used for coating and film formation. Background technique [0002] Polyurethane is a class of polymers containing urethane characteristic units in the main chain. This polymer material is widely used in industrial fields such as adhesives, coatings, low-speed tires, gaskets, and car mats. Polyurethanes are usually produced by reacting isocyanates with polyols, which are mostly derived from petroleum. Facing the increasing shortage of petroleum supply, it is particularly important to find alternative polyol resources, and vegetable oil, as a cheap petroleum substitute, has become the key to the existence and development of the polymer industry. All isocyanates have a pungent smell, have a strong irritating effect on the skin, eyes and respiratory tract, and can cause eczema and bronchial asthma with severe side effects. Large-scale sto...

Claims

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Application Information

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IPC IPC(8): C09D175/04C09D7/61C08G71/04
Inventor 王鑫
Owner FUJIAN LONGSHANG MICROFIBER
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