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Method for preparing hyperbranched polyester modified organic silicon resin

A technology of polyester modification and silicone, which is applied in the direction of coating, etc., can solve the problems of unsatisfactory heat resistance, acid resistance and salt spray resistance, etc., and achieve excellent salt spray resistance, water and solvent resistance, and high The effect of heat resistance

Active Publication Date: 2012-06-20
HANGZHOU JIHUA POLYMER MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the heat resistance, acid resistance and salt spray resistance of existing silicone resins are not ideal yet.

Method used

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  • Method for preparing hyperbranched polyester modified organic silicon resin
  • Method for preparing hyperbranched polyester modified organic silicon resin
  • Method for preparing hyperbranched polyester modified organic silicon resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] 1) Hydroxy-terminated hyperbranched polyester

[0041] a) Composition:

[0042] Trihydric alcohol: 96g (0.8mol) of trimethylolethane; 25.2g (0.2mol) of 1,3,5-benzenetriol;

[0043] Dibasic acid: 132.8g (0.8mol) of terephthalic acid; 23.6g (0.2mol) of succinic acid;

[0044] b) synthesis steps:

[0045] Add the trihydric alcohol and the 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 ; At last, room temperature was cooled to obtain 235g terminal hydroxyl hyperbranched polyester.

[0046] c) Properties of hydroxyl-terminated hyperbranched polyesters

[0047] The weight-average molecular weight of the hydroxyl-terminated hyperbranched polyester was detected by gel permeation chromatography, and the result was 3998.

[0048] The hydroxyl value was tested according to the...

Embodiment 2

[0075] 1) Hydroxy-terminated hyperbranched polyester

[0076] a) Composition:

[0077] Trihydric alcohol: 168g (1.4mol) of trimethylolethane; 37.8g (0.3mol) of 1,2,4-benzenetriol; 37.8g (0.3mol) of 1,3,5-benzenetriol;

[0078] Dibasic acid: 66.4g (0.4mol) of isophthalic acid; 66.4g (0.4mol) of terephthalic acid; 29.2g (0.2mol) of adipic acid;

[0079] b) synthesis steps:

[0080] Add tribasic alcohol 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 for 2h at 0.66kPa ; Finally, room temperature was cooled to obtain 364g terminal hydroxyl hyperbranched polyester.

[0081] c) Properties of hydroxyl-terminated hyperbranched polyesters

[0082] The weight-average molecular weight of the hydroxyl-terminated hyperbranched polyester is detected by gel permeation chromatography, and the result is 1...

Embodiment 3

[0105] 1) Hydroxy-terminated hyperbranched polyester

[0106] a) Composition:

[0107] Triol: Trimethylolethane 192g (1.6mol);

[0108] Dibasic acid: 157.7g (0.95mol) of isophthalic acid; 7.3g (0.05mol) of adipic acid;

[0109] b) synthesis steps:

[0110] Add tribasic alcohol 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 2 hours; heat it to 240°C at a heating rate of 20°C per hour, and keep it at 0.78kPa for 2.5 h; finally cooled to room temperature to obtain 310g hydroxyl-terminated hyperbranched polyester.

[0111] c) Properties of hydroxyl-terminated hyperbranched polyesters

[0112] The weight-average molecular weight of the hydroxyl-terminated hyperbranched polyester was detected by gel permeation chromatography, and the result was 2611.

[0113] The hydroxyl value was tested according to the method described in GB / T7193.2-1987, and the result was...

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Abstract

The invention relates to organic silicon resin, in particular to a method for preparing hydroxyl-terminated hyperbranched polyester modified organic silicon resin. The method comprises the following steps of: adding 40 to 60 weight percent of hydroxyl-terminated hyperbranched polyester, 40 to 60 weight percent of organic silicon resin and a cross linking catalyst into a reactor; after heating the mixture for 1 to 3 hours at the temperature of 110 to 120 DEG C, warming to the temperature of 150 to 180 DEG C and heating for 1 to 3 hours; and finally, reducing the temperature to the room temperature and adding an organic solvent to regulate the solid content to the range of 60 to 70 percent so as to obtain the hydroxyl-terminated hyperbranched polyester modified organic silicon resin. The method combines the advantages of the hydroxyl-terminated hyperbranched polyester with the organic silicon resin and excellent heat resistance, low surface energy, excellent boiling resistance and excellent salt fog resistance are obtained. The resin prepared by the method disclosed by the invention can be used for preparing a coating with high temperature resistance and low surface energy.

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. Commonly used other resins to modify it. Polyester resin has excellent metal adhesion, good physical and mechanical properties such as high hardness and good chemical corrosion resistance, and is widely used in the coating industry. The use of polyester-modified silic...

Claims

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Application Information

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IPC IPC(8): C08G81/00C08G77/38C08G63/91C09D187/00C09D7/12
Inventor 刘海兵
Owner HANGZHOU JIHUA POLYMER MATERIAL CO LTD
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