Unsaturated polyester resin for putty
A polyester resin and unsaturated technology, applied in the field of unsaturated polyester resin for putty, can solve the problem of high cost, and achieve the effect of improving performance, improving various properties and reducing cost
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Embodiment 1
[0019] Embodiment 1 prepares unsaturated polyester resin for putty
[0020] Synthesized according to the following steps:
[0021] ① Prepare raw materials according to the following formula:
[0022] In terms of molar ratio, dicyclopentadiene: isophthalic acid: maleic anhydride: diethylene glycol is 0.3: 0.3: 1.0: 1.3;
[0023] ②In the reaction kettle, first add 0.3 mol of dicyclopentadiene, maleic anhydride (0.3 mol) equivalent to dicyclopentadiene and appropriate amount of water to heat up, and react at 90°C for 4 hours until the acid value is close to constant, at which point maleic anhydride hydrolyzes and forms a monoester with dicyclopentadiene;
[0024] ③In the reaction kettle, add 0.3 mole of isophthalic acid and 0.6 mole of diethylene glycol, and react with the monoester formed in step ②, in the presence of catalyst butyl titanate, at 200°C until the material until it becomes transparent;
[0025] ④ Cool down to 150°C, add remaining maleic anhydride (0.7 mol) and ...
Embodiment 2
[0027] Embodiment 2 prepares putty
[0028] Prepare raw materials according to the following formula: talcum powder (325 orders) 360g, talcum powder (600 orders) 150g; Titanium dioxide (rutile type) 10g; Fumed silica 6g; Unsaturated polyester resin (embodiment 1 system) 300g; Accelerator (cobalt naphthenate) 4.0g;
[0029] The above raw materials are mixed evenly, kneaded by a kneader, and ground by a three-roll mill to obtain the atomic ash.
[0030] The properties of the putty were tested according to relevant national standards, and the results are shown in Table 1.
[0031] Table 1
[0032] Test items
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