Polyurethane reaction accelerator as well as preparation method and application thereof
A reaction accelerator, polyurethane technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of unfriendly production and users, achieve the effect of production and user friendliness, and reduce VOC content
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Embodiment 1
[0030] The raw materials for the preparation of the polyurethane reaction accelerator in Example 1 of the present invention are 1,2-propanediol and methyl hexahydrophthalic anhydride. The specific preparation method is: add 76.1g (1mol) 1,2-propanediol and 168.2g ( 1mol) of methyl hexahydrophthalic anhydride, heated to 110°C, and reacted for 3 hours to obtain the reaction accelerator. The accelerator has a viscosity of 1220 mPa·s, an acid value of 229.8 mgKOH / g, and a hydroxyl content of 7.0%.
Embodiment 2
[0032] The raw materials for the preparation of the polyurethane reaction accelerator in Example 2 of the present invention are 1,2-butanediol and methyl hexahydrophthalic anhydride. The specific preparation method is: add 90.1g (1mol) 1,2-butanediol and 168.2 g (1mol) of methyl hexahydrophthalic anhydride, heated to 100°C, and reacted for 4 hours, the reaction accelerator can be obtained. The accelerator has a viscosity of 1540 mPa·s, an acid value of 217.5 mgKOH / g, and a hydroxyl content of 6.6%.
Embodiment 3
[0034] The raw materials for the preparation of the polyurethane reaction accelerator in Example 3 of the present invention are 1,2-pentanediol and methylhexahydrophthalic anhydride. The specific preparation method is: add 104.2g (1mol) 1,2-pentanediol and 168.2 g (1mol) of methyl hexahydrophthalic anhydride, heated to 120°C, and reacted for 2 hours, the reaction accelerator can be obtained. The accelerator has a viscosity of 1710 mPa·s, an acid value of 206.2 mgKOH / g, and a hydroxyl content of 6.2%.
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