Preparation method of modified organic silicon resin and paint containing prepared modified organic silicon resin

A silicone and resin technology, applied in the field of organic polymer compounds, can solve the problems of chemical resistance that cannot meet the requirements, reduce the water resistance of the coating film, poor mechanical properties of the coating film, etc., and achieve good metal adhesion and high heat resistance Good performance and adhesion

Inactive Publication Date: 2012-08-08
SOUTHERN MEDICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the molecular weight of the coating film formed after the hyperbranched polymer film is low, and the low crosslinking density leads to poor mechanical properties of the coating film, and the chemical resistance cannot meet the requirements; at the same time, the coating film surface formed by the hyperbranched polymer film contains Abundant active groups reduce the water resistance of the coating film

Method used

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  • Preparation method of modified organic silicon resin and paint containing prepared modified organic silicon resin
  • Preparation method of modified organic silicon resin and paint containing prepared modified organic silicon resin
  • Preparation method of modified organic silicon resin and paint containing prepared modified organic silicon resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1) Amino-terminated hyperbranched polyamide

[0035] a) Composition:

[0036] Melamine: 126g (1.0mol);

[0037] Dibasic acid: 57.1g (0.5mol) of isophthalic acid; 49.8g (0.3mol) of terephthalic acid; 29g (0.2mol) of 1,6-adipic acid

[0038] b) synthesis steps:

[0039] Add melamine and dibasic acid into a reactor equipped with heating, condensation and nitrogen protection, raise the temperature to 110°C under nitrogen protection, and keep it for 2h; heat it to 240°C at a heating rate of 20°C per hour, and keep it at 1.33kPa for 4h; Finally, the room temperature was cooled to obtain 220 g of amino-terminated hyperbranched polyamide.

[0040] c) Properties of amino-terminated hyperbranched polyamides

[0041] The weight-average molecular weight of the amino-terminated hyperbranched polyamide was detected by gel permeation chromatography, and the result was 5001.

[0042] 2) Modified silicone resin

[0043] a) Composition:

[0044] Amino-terminated hyperbranched poly...

Embodiment 2

[0069] 1) Amino-terminated hyperbranched polyamide

[0070] a) Composition:

[0071] Melamine: 252g (2.0mol);

[0072] Dibasic acid: 99.6g (0.6mol) of isophthalic acid; 23.6g (0.2mol) of 1,4-butanedioic acid; 29g (0.2mol) of 1,6-adipic acid;

[0073] b) synthesis steps:

[0074] Add melamine and dibasic acid into a reactor equipped with heating, condensation and nitrogen protection, raise the temperature to 110°C under nitrogen protection, and keep it for 2h; heat it to 240°C at a heating rate of 20°C per hour, and keep it at 0.66kPa for 2h; Finally, the room temperature was cooled to obtain 364g of amino-terminated hyperbranched polyamide.

[0075] c) Properties of amino-terminated hyperbranched polyamides

[0076] The weight-average molecular weight of the amino-terminated hyperbranched polyamide was detected by gel permeation chromatography, and the result was 1992.

[0077] 2) Modified silicone resin

[0078] a) Composition:

[0079] Amino-terminated hyperbranched p...

Embodiment 3

[0099] 1) Amino-terminated hyperbranched polyamide

[0100] a) Composition:

[0101] Melamine: 176.4g (1.4mol);

[0102] Dibasic acid: 132.8g (0.8mol) of terephthalic acid; 29.2g (0.2mol) of 1,6-adipic acid;

[0103] Amino-containing alkyl carboxylic acid: glycine 3.75g (0.05mol); 3-aminopropionic acid 4.45g (0.05mol)

[0104] b) synthesis steps:

[0105] Add melamine, dibasic acid and amino-containing alkyl carboxylic acid into a reactor equipped with heating, condensation and nitrogen protection, raise the temperature to 110°C under nitrogen protection, and keep it warm for 2 hours; heat to 240°C at a heating rate of 20°C per hour, Insulated at 0.78kPa for 2.5h; finally cooled to room temperature to obtain 304g of amino-terminated hyperbranched polyamide.

[0106] c) Properties of amino-terminated hyperbranched polyamides

[0107] The weight-average molecular weight of the amino-terminated hyperbranched polyamide was detected by gel permeation chromatography, and the re...

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PUM

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Abstract

The invention relates to the field of organic high molecular compounds, and particularly relates to a preparation method of modified organic silicon resin. The method comprises the following steps: sequentially heating 40-60w% of amino-terminated hyperbranched polyamide, 1-10w% of epoxy resin and 30-50w% of organic silicon resin along with a crosslinking catalyst accounting for 1-10w% of the amino-terminated hyperbranched polyamide respectively at 110-120 DEG C, 150-170 DEG C and 200-210 DEG C for 1-3 hours; and finally cooling to room temperature, and adding an organic solvent to regulate the solid content to 60-70%. The method combines the advantages of the hyperbranched polyamide, the epoxy resin and the organic silicon resin, and achieves excellent heat resistance, favorable metal adhesion, low surface energy and excellent water boiling resistance and alkaline resistance. The modified organic silicon resin prepared by the method can be used for preparing a high-temperature-resistant low-surface-energy paint.

Description

technical field [0001] The invention relates to the field of organic macromolecular compounds, and relates to a macromolecular compound obtained by reacting only silicon and oxygen, in particular to an organosilicon resin. Background technique [0002] Silicone resin has a -Si-O-Si- structure, which shows excellent properties such as weather resistance, heat resistance, stain resistance and chemical stability. However, pure silicone resin needs to be cured at high temperature, and the curing time is long, which is inconvenient for construction. At the same time, it has poor adhesion to metal materials, poor solvent resistance, low mechanical strength, and high price, so its use is limited to a certain extent, so other resins are commonly used. Modify it. Modification of silicone resins with other resins such as epoxies can improve the metal adhesion, hardness and mechanical properties of the resin. For example, Deng Mingshan et al. used bisphenol A epoxy resin to modify me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G77/455C08G59/62C08G59/56C08G69/36C09D183/10C09D7/12
Inventor 刘瑞源游文玮严轶琛席华松路新卫
Owner SOUTHERN MEDICAL UNIVERSITY
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