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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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.
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Property | Measurement | Unit |
Hydroxyl value | 241.0 | mgKOH/g |
Hydroxyl value | 638.0 | mgKOH/g |
Hydroxyl value | 507.0 | mgKOH/g |
tensile | MPa | |
Particle size | Pa | |
strength | 10 |
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