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A kind of preparation method of organosilicon modified polyurethane

A technology of organosilicon and polyurethane, applied in the field of preparation of organosilicon modified polyurethane, can solve the problems of poor heat resistance of hyperbranched polyurethane, limited application, low content, etc., and achieve excellent alkali resistance and salt resistance, good mechanical and mechanical properties. , the effect of good thermal stability

Active Publication Date: 2022-05-13
HANGZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing hyperbranched polyurethane prepared by these two methods has the disadvantage of poor heat resistance, which limits its application
In order to overcome these shortcomings, the Chinese invention patent CN201611040503.7 uses polyfunctional alkoxysilane to react with polyurethane to obtain organosilicon-modified hyperbranched polyurethane with good heat resistance, but the organosilicon-modified polyurethane prepared by this method contains organic The silicon component only has isolated chain segments dispersed in the polymer molecule after hydrolysis of alkoxysilane. The silicone chain segment is short and the content is small, so it is difficult to give full play to the advantages of silicone

Method used

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  • A kind of preparation method of organosilicon modified polyurethane
  • A kind of preparation method of organosilicon modified polyurethane
  • A kind of preparation method of organosilicon modified polyurethane

Examples

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preparation example 1

[0040] 1. Preparation of hydroxy -based seal -end overpowered fatty polyether polyethylene polymond metropolitan silicone

[0041] (1) Preparation of hydroxy -based seal -end hypertrophic aliphed polyether

[0042] Take a clean and dry three-mouth bottle, and under the protection of nitrogen, add 134.2g (1.0mol) trimethyl methyl propionane, 73.5ml of methanol potassium-methanol solution (1.36 mol / L). G shrinks gly glycerin (21.0mol), and after about 6h dripping, continue to react for 6h. At the end of the reaction, add methanol dissolving products, add 36.5 % hydrochloric acid neutralization, and pour peltone precipitation. After repeating the twice, the transparent viscous liquid is obtained after the vacuum is 24h at 70 ° C, that is, the hydroxyl seal -end hypertrophic alipher polyether.

[0043] FT-IR spectrum of hydroxyl sealing end hyperpolitic aliphed polyether, such as figure 1 Show, the 1HNMR spectrum of hydroxy -based sealing end of the aliphed polyether is figure 2 Show....

Embodiment 1

[0048] (1) Obtaining hydroxyl seal in the preparation for preparation example 1 The hydroxygenic chip ether-organic silicon embedded cluster 5g, end hydroxyl seal polyether-organic silicon-polyether triangular cluster 10g, molecular weight 2000 polymer Tetrahydrofurate 38.0g, 1,4-butyl binary alcohol 0.530g and HDI 11.0g. In the reactive solvent acetone 76.2g, under the catalysis of the two-dicotya February cinnamon sour tin / 130mmHg remove the solvents and obtain a hyper silicon -mitated polyurethane compound of the beesein -based sealing end, as a component A;

[0049] (2) Obtaining hydroxyl seal in the preparation for preparation example 1 The hydroxygenic chip ether-organic silicon embedded cluster 3g, end hydroxyl seal polyether-organic silicon-polyether triangular cluster 20g, molecular weight 2000 polymer四氢呋喃72g、1,4-丁二元醇1.778g和HDI 4.0g,在反应溶剂丙酮73.2g中,在二丁基二月桂酸锡0.508g催化下,40℃反应4h,减压到60℃ / 130mmHg remove the solvents and obtain a hyper silicon -mitated polyurethane compounds at t...

Embodiment 2

[0053] (1) Obtaining hydroxyl seal in the preparation for preparation example 1 The hydroxygenic chip ether-organic silicon embedded cluster 6g, end hydroxyl seal polyether-organic silicon-polyether triangular cluster 20g, molecular weight 2000 polymer Tetrahydrocarfu 55g, 1,4-butin binaryol 1.5g and TDI 25.0g, in the reactive solvent N-methylpylpylene 37.2g, under the catalysis of the 2-butyl February cinnamonic acid tin 0.93g, the 90 ° C reaction is 1h, the decompression is decompressed To 120 ° C / 130mmHg remove the solvents, obtain a hyper silicon -mitated polyurethane compounds at the beekeehyl sealing end, as a group A;

[0054] (2) Obtaining the hydroxyl seal of the hydroxyl seal of the hydroxyl section of the hydroxyl seal-organic polyether-organic silicon embedded cluster 5g, end hydroxyl seal polyether-organic silicon-polyether triangular section 20g of cluster, molecular weight 2000 polythexia fuuu 43.6G, 1,4-butyl glycol 1.778g and TDI 6.0g. In the reactive solvent N-me...

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Abstract

The present invention relates to the technical field of organosilicon. In order to solve the problems existing in the synthesis of hyperbranched polyurethane at present, the present invention proposes a preparation method of organosilicon-modified polyurethane, which uses hydroxyl-terminated hyperbranched aliphatic polyether-organosilicon block copolymer , hydroxyl-terminated polyether-silicon-polyether tri-block copolymer as raw material, reacted with polytetrahydrofuran, 1,4-butanediol and diisocyanate to prepare isocyanate-terminated component A and hydroxyl-terminated Component B, then mix components A and B evenly according to the molar ratio of isocyanate group to hydroxyl group of 6:1~1:9 to obtain a cured product, which has excellent alkali resistance and salt resistance, good thermal stability, Good mechanical properties.

Description

Technical field [0001] The invention involves the field of silicon technology, which specifically involves a preparation method for organic silicon modified polyurethane. technical background [0002] Polyurethane material is one of the fastest -growing polymer materials. It has characteristics such as wear -resistant, tear resistance, and anticochrome resistance. It can also make various products with different performances and has a wide range of uses. The structure of polyurethane is composed of a soft segment and a hard segment. The soft segment is usually polyether or polyester, which gives polyurethane to flexibility and toughness. The hard segments are usually diocyanate and small molecular glycol or dihamines, which gives polyurethane to strength and rigidity. By regulating the proportion of soft and hard segments and different polyol structures, materials with different performance can be obtained. Due to the introduction of hydrophilic groups in the molecular chain, wat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G81/00
CPCC08G81/00
Inventor 杨雄发刘江玲吴于飞焦晓皎程飞来国桥
Owner HANGZHOU NORMAL UNIVERSITY
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