Flexible unsaturated polyester resin and preparation method and application thereof
A polyester resin and unsaturated technology, applied in the field of flexible unsaturated polyester resin and its preparation, can solve the problems of insufficient toughness, inability to meet the application requirements of unsaturated resin, high hardness, and achieve the effect of high elongation at break
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Embodiment 1
[0049] The flexible unsaturated polyester resin reactant comprises the following components by weight percentage:
[0050] Diethylene glycol 12%
[0051] Ethylene glycol 9%
[0052] Phthalic anhydride 14%
[0053] Adipic acid 18%
[0054] Maleic anhydride 8%
[0055] Oleic Acid 3%
[0056] Styrene 33%
[0057] Diallyl Phthalate 3%
[0058] The preparation method of flexible unsaturated polyester resin comprises the following steps:
[0059]Add the raw materials of diethylene glycol, ethylene glycol, phthalic anhydride, adipic acid and maleic anhydride into the reaction pot at one time, control the reaction temperature at 195-205°C, and carry out polycondensation under the protection of nitrogen After 10 hours of reaction, the acid value reached 45±5mgKOH / g; the temperature was lowered to 160°C, and the formulated amount of oleic acid was added to the synthesis equipment, and the reaction temperature was controlled at 195~205°C for 3 hours of polycondensation reaction, a...
Embodiment 2
[0065] The flexible unsaturated polyester resin reactant comprises the following components by weight percentage:
[0066] Propylene Glycol 12%
[0067] Diethylene glycol 8%
[0068] Phthalic anhydride 17%
[0069] Adipic acid 22%
[0070] Maleic anhydride 10%
[0071] Oleic Acid 4%
[0072] Styrene 25%
[0073] Diallyl Phthalate 2%.
[0074] The preparation method is the same as in Example 1.
Embodiment 3
[0076] The flexible unsaturated polyester resin reactant comprises the following components by weight percentage:
[0077] Dipropylene Glycol 10%
[0078] Propylene Glycol 7%
[0079] Phthalic Anhydride 12%
[0080] Adipic acid 18%
[0081] Maleic anhydride 14%
[0082] Oleic Acid 5%
[0083] Styrene 30%
[0084] Diallyl Phthalate 4%.
[0085] The preparation method is the same as in Example 1.
[0086] It is proved by experiments that the tensile elongation of the resin has reached more than 15%, and the hardness is 70 in the rubber hardness level. There is mainly one performance that meets the customer's requirements: it is generally required that when it is cast into a cylindrical shape with a diameter of 1cm, it will not break when it is bent at 180 degrees.
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