Unsaturated polyester resin for vacuum infusion process and resin composition thereof

A polyester resin, vacuum introduction technology, applied in the field of unsaturated polyester resin, can solve problems such as lack of matrix resin

Inactive Publication Date: 2012-01-11
CHANGZHOU HUARUN COMPOSITE MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] An object of the present invention is to provide a kind of unsaturated polyester resin used in the vacuum introduction process, which can effectively solve the problem of the lack of suitable matrix resin in the production of glass fiber reinforced plastic structural products by the vacuum introduction process, especially in large glass fiber reinforced plasti

Method used

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  • Unsaturated polyester resin for vacuum infusion process and resin composition thereof
  • Unsaturated polyester resin for vacuum infusion process and resin composition thereof
  • Unsaturated polyester resin for vacuum infusion process and resin composition thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0101] The preparation of embodiment 1 unsaturated polyester resin

[0102] Propylene glycol, ethylene glycol, isophthalic acid and maleic anhydride are used as polymerized monomers, styrene is used as a crosslinking agent, H-90 exothermic peak inhibitor, diethylaniline and copper naphthenate are used as auxiliary agents. The method for preparing unsaturated polyester resin is as follows:

[0103]Put monomers such as propylene glycol, ethylene glycol and isophthalic acid, and an appropriate amount of monobutyltin oxide catalyst into the reactor, and carry out polycondensation reaction at 200-210°C under the protection of nitrogen. When the solid acid value is below 20mgKOH / g, lower the temperature to below 155°C, add maleic anhydride into the reactor, and continue to heat up to 200-210°C for reaction; when the solid acid value is 49-53mgKOH / g, vacuumize To vacuum degree -80kPa. When the cone-plate viscosity (No. 3 rotor, 150°C) is 600-690mPa·s, release the vacuum and cool it...

Embodiment 2

[0104] The preparation of embodiment 2 unsaturated polyester resin and composition thereof

[0105] Propylene glycol, ethylene glycol, isophthalic acid and maleic anhydride are used as polymerized monomers, styrene is used as a crosslinking agent, H-90 exothermic peak inhibitor, diethylaniline and copper naphthenate are used as auxiliary agents. The method for preparing unsaturated polyester resin is as follows:

[0106] Put monomers such as propylene glycol, ethylene glycol and isophthalic acid, and an appropriate amount of catalyst into the 350L reactor in sequence. Under the protection of nitrogen, start to heat up while stirring, keep warm for 1 hour when the temperature rises to 155-160°C, and control the temperature of the distillation head at 100-102°C. Stop feeding nitrogen into the reaction kettle, and increase the pressure in the reaction kettle, control the pressure of the reaction kettle to 1-2 bar, and raise the temperature to 205-210° C. to continue the reaction...

Embodiment 3

[0108] The preparation of embodiment 3 unsaturated polyester resin and composition thereof

[0109] Propylene glycol, ethylene glycol, isophthalic acid and maleic anhydride are used as polymerized monomers, styrene is used as a crosslinking agent, H-90 exothermic peak inhibitor, diethylaniline and copper naphthenate are used as auxiliary agents. The method for preparing unsaturated polyester resin is as follows:

[0110] ①Put propylene glycol, ethylene glycol, isophthalic acid and monobutyltin oxide into a 350L reactor in sequence.

[0111] ②Pass nitrogen gas (flow rate: 0.5m3 / h) for 10 minutes, make the inside of the reactor in a state of nitrogen blanketing, start stirring and start to heat up, keep warm for 1 hour when the temperature rises to 155-160°C, and immediately condense vertically when the water comes out of the distillation head Cooling water is passed through the device, and the temperature of the distillation head is controlled to be 100-102°C.

[0112] ③ Stop...

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Abstract

The invention discloses an unsaturated polyester resin for a vacuum infusion process. Monomers such as propylene glycol, ethylene glycol, m-phthalic acid, maleic anhydride and the like are prepared into unsaturated polyester through condensation polymerization reaction, then the unsaturated polyester is added into styrene to prepare the unsaturated polyester resin and the unsaturated polyester resin is matched with auxiliary agents such as an H-90 exothermic peak inhibitor, diethylbenzene, copper uversol and the like to form a composition. In the invention, the m-phthalic acid is used as a saturated acid to be introduced into the resin, so that the heat resistance and the corrosion resistance of the resin are improved; the auxiliary agents such as the H-90 exothermic peak inhibitor, the copper uversol and the like are adopted, so that the poor phenomena such as product crack, local burning and the like caused by over-high heat release during resin solidification are effectively avoided; and the diethylbenzene is adopted, so that the demolding strength of a product can be achieved in 3-5 hours. The technical scheme provided by the invention is suitable for large-sized glass fiber reinforced plastic produced by the vacuum infusion process, in particular to large-sized thick workpieces, the glass fiber reinforced plastic products, such as fan housings, glass fiber reinforced plastic boats and the like, and the strength, the weather resistance and the water resistance of the product are improved.

Description

technical field [0001] The invention relates to an unsaturated polyester resin, in particular to an unsaturated polyester resin used in a vacuum introduction process. The resin composition obtained after mixing the resin with an auxiliary agent is suitable for producing large-scale FRP structures by the vacuum introduction process products. Background technique [0002] FRP (Fiber Reinforced Plastic, FRP) is a composite material made of glass fiber and its products (glass cloth, tape, felt and yarn, etc.) It mainly has the following characteristics: 1. Light weight and high strength, the tensile strength is 4-6 times that of ordinary steel. 2. Anti-corrosion and anti-aging, the service life can be as long as 50 years. 3. Easy to shape and strong designability. 4. Good insulation and heat resistance. [0003] Chinese invention patent ZL85108789 discloses a reinforced sizing for FRP fibers, which consists of a coupling agent, a film-forming agent, a lubricant, a plasticize...

Claims

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Application Information

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IPC IPC(8): C08F283/01C08G63/52C08L67/06C08K5/01C08K5/18C08K5/098C08K13/04
Inventor 包柏青曹建兴刘世仓
Owner CHANGZHOU HUARUN COMPOSITE MATERIALS
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