Preparation method of non-isocyanate polyurethane and application of non-isocyanate polyurethane in spraying polyurea

A non-isocyanate and polyurethane technology, applied in the field of organic polymer materials, can solve the problems of high-pollution polyisocyanate pollution, high cost of amino-terminated polyether, and inconvenient application and development, and achieve low cost, excellent hydrolysis resistance, and reduced use The effect of isocyanate

Inactive Publication Date: 2012-10-10
GUANGXI UNIV FOR NATITIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to provide a preparation of non-isocyanate polyurethane and its application in spray polyurea, aiming to solve the problems of high cost, high

Method used

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  • Preparation method of non-isocyanate polyurethane and application of non-isocyanate polyurethane in spraying polyurea
  • Preparation method of non-isocyanate polyurethane and application of non-isocyanate polyurethane in spraying polyurea
  • Preparation method of non-isocyanate polyurethane and application of non-isocyanate polyurethane in spraying polyurea

Examples

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Embodiment 1

[0039] Preparation of non-isocyanate polyurethane

[0040] (1) Add 500 grams of polypropylene glycol with a molecular weight of 400 into a four-necked flask, add 25 grams of potassium hydroxide catalyst, control the temperature at 50°C and slowly add 231 grams of epichlorohydrin dropwise, and control the temperature at 80°C to react After 4 hours, add 125 g of 40% NaOH solution dropwise, finish dropping within 2 hours, keep warm at 80°C for 5 hours, wash with water repeatedly, distill and dehydrate under reduced pressure to obtain polypropylene glycol diglycidyl ether as a light yellow transparent liquid.

[0041] (2) Weigh 15 grams of potassium carbonate, 10 grams of potassium iodide and 85 grams of activated carbon, and prepare by equal-volume impregnation. The impregnation process is treated in an ultrasonic vibrator for 3 hours, then suction filtered, dried, and placed in an oven at 120 ° C. After drying for 6 hours, place it in a nitrogen atmosphere furnace, and then acti...

Embodiment 2

Embodiment 3

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Abstract

The invention discloses a preparation method of non-isocyanate polyurethane and application of the non-isocyanate polyurethane in spraying polyurea. The preparation method of the non-isocyanate polyurethane comprises the following steps: (1) preparing a polyether diol diglycidyl ether intermediate; (2) preparing a heterogeneous loaded potassium carbonate and potassium iodide catalyst; (3) preparing polyether bicyclo carbonate; and (4) preparing the non-isocyanate polyurethane product. The invention has the advantages as follows: 1, the preparation method is low in energy consumption, free of pollution and low in cost and has a concept of environment friendliness, low-carbon economy and atomic economy; and 2. the prepared non-isocyanate polyurethane, as a amine resin for the spraying polyurea, has better chemical resistance, hydrolysis resistance and the penetration resistance and is superior to amino-terminated polyether in adhesion to substrate and leveling property.

Description

technical field [0001] The invention belongs to the field of organic polymer materials, in particular to the preparation of non-isocyanate polyurethane and its application in spraying polyurea. Background technique [0002] Polyurethane plays a pivotal role in industry and life. At present, polyurethane coatings are mostly prepared by the reaction of polyisocyanate and polyol. However, highly toxic isocyanate materials are used in the preparation, and phosgene, a raw material for preparing polyisocyanates, is more toxic, which brings harm to human health and the environment. [0003] Non-isocyanate polyurethane not only does not use highly toxic and moisture-sensitive polyisocyanate in the preparation process, but also makes up for the weak bond structure in traditional polyurethane from the molecular structure, and has excellent chemical resistance, hydrolysis resistance and permeability resistance. . With the promotion of "clean production process", non-isocyanate polyur...

Claims

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Application Information

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IPC IPC(8): C08G71/04C08G64/34C09D175/04C09D175/02
Inventor 赵彦芝周菊英
Owner GUANGXI UNIV FOR NATITIES
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