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

Inactive Publication Date: 2010-08-18
上海新天和树脂有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The Barcol hardness of the unsaturated polyester resin prepared by this traditional method is about 35, the elongation at break is about 5%, and the impact toughness is 8KJ / m 2 Left and right, it cannot meet the application requirements of unsaturated resins in furniture, door panels, etc. as decal products
[0003] 1. Traditional unsaturated polyester resins generally only contain phthalic anhydride and maleic anhydride. Due to the use of more phthalic anhydride and maleic anhydride, the physical properties are characterized by high hardness and strength. High, but poor toughness
[0004] 2. In the traditional unsaturated polyester resin, styrene is generally used as the diluent. Due to the characteristics of polystyrene, the product has high hardness and insufficient toughness, and the probability of brittle cracking is very high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

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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PUM

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Abstract

The invention relates to a flexible unsaturated polyester resin and a preparation method and application thereof. The resin is prepared by mixing and reacting a dibasic acid or anhydride, a monobasic acid and dibastic alcohol and diluting the reaction product with a diluent and comprises the following components in percentage by weight: 17 to 24 percent of dibastic alcohol, 3 to 5 percent of monobasic acid, 39 to 53 percent of dibasic acid or anhydride and 26 to 35 percent of diluent, wherein the monobasic acid is oleinic acid; and the diluent is styrene and diallyl phthalate which accounts for 2 to 5 percent of the total weight of the diluent. The preparation method comprises the following steps: performing polycondensation reaction on the dibastic alcohol and the dibasic acid or anhydride for 8 to 12 hours at the temperature of about 200 DEG C, wherein the acid value is 40 to 50mgKOH/g, reducing the temperature, adding the oleinic acid, performing polycondensation reaction for 2 to 3 hours, after the reaction is completed, reducing the pressure and performing vacuum treatment until the acid value is 25 to 35mgKOH/g, adding an additive, cooling, and adding the diluent to obtain the flexible unsaturated polyester resin. The prepared flexible unsaturated polyester resin has high elongation at break and impact toughness and certain strength, and meets the requirements on physical properties of articles.

Description

technical field [0001] The invention belongs to the technical field of unsaturated polyester resins, and in particular relates to a flexible unsaturated polyester resin and a preparation method thereof. Background technique [0002] Ordinary unsaturated resins are generally polycondensed from phthalic anhydride, maleic anhydride, propylene glycol, ethylene glycol, and diethylene glycol, and are linear polymer compounds with ester bonds and unsaturated double bonds. The Barcol hardness of the unsaturated polyester resin prepared by this traditional method is about 35, the elongation at break is about 5%, and the impact toughness is 8KJ / m 2 Left and right, it cannot meet the application requirements of unsaturated resins in furniture, door panels, etc. as decal products. [0003] 1. Traditional unsaturated polyester resins generally only contain phthalic anhydride and maleic anhydride. Due to the use of more phthalic anhydride and maleic anhydride, the physical properties are...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/01C08F212/08C08F222/26C08G63/52C08G63/54C08L51/08
Inventor 邱灵强麻慎荣何炜
Owner 上海新天和树脂有限公司
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