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Preparation method, product and application of thermosetting unsaturated polyester resin capable of thermal processing, molding and recycling

A technology for processing and molding polyester resins, which is applied in the field of preparation of thermosetting unsaturated polyester resins, can solve problems such as high cost and difficult recycling, and achieve excellent mechanical properties

Active Publication Date: 2017-12-29
JIANGSU RUIKANG NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 3. The unprocessability of thermosetting unsaturated polyester and its composite materials directly makes it difficult to be recycled
Chemical methods, including pyrolysis, alcoholysis, hydrolysis, aminolysis, biological enzyme decomposition, etc., the main purpose is to recover and make usable oil, combustible gas, etc., but the cost of this method is relatively high, and there is no industrialization case yet

Method used

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  • Preparation method, product and application of thermosetting unsaturated polyester resin capable of thermal processing, molding and recycling
  • Preparation method, product and application of thermosetting unsaturated polyester resin capable of thermal processing, molding and recycling
  • Preparation method, product and application of thermosetting unsaturated polyester resin capable of thermal processing, molding and recycling

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Embodiment 1 thermosetting unsaturated polyester resin preparation

[0043] With 6.5g o-phthalic unsaturated polyester oligomer (weight-average molecular weight 2500, unsaturated maleic anhydride content is 30wt%, its raw material chemical composition is: alkyd molar ratio is 1.1:1, wherein, alcohol is propylene glycol, 1 , 2-ethylene glycol and diethylene glycol (molar ratio 1:1:1); acid is phthalic anhydride, maleic anhydride (molar ratio is 7:3), prepared by existing polymerization method), Mix 3.5g styrene, 0.1g cyclohexanone peroxide, 0.05g cobalt naphthenate and 0.2g 1,5,7-triazabicyclo[4.4.0]dec-5-ene at room temperature, pour Put it into an aluminum pan, place it in an oven, react at 50°C for 2 hours, then raise the temperature to 80°C and react for 5 hours, and then obtain a thermosetting unsaturated polyester resin after cooling. The glass transition temperature Tg measured by DSC is 120°C.

Embodiment 2

[0044] The thermoforming of embodiment 2 thermosetting unsaturated polyester resins

[0045] Such as figure 1 Shown: the thermosetting unsaturated polyester prepared in Example 1 is cut into a long sheet (20*10*1mm), which is recorded as shape a, such as figure 1 Shown in (a). Heat the long piece of unsaturated polyester to 160°C, apply external force to make it form a certain arc, which is recorded as shape b, such as figure 1 Shown in (b). Keep the external force at this temperature for 5 hours, remove the external force, and the unsaturated polyester long sheet is fixed in shape b. Still at 160°C, apply an external force to make the unsaturated polyester long sheet form another different arc, which is recorded as shape c, such as figure 1 Shown in (c). Keep the external force at this temperature for 5 hours, remove the external force, and the unsaturated polyester long sheet is fixed in shape c.

Embodiment 3

[0046] Embodiment 3 Assembly of thermosetting unsaturated polyester resin components

[0047] Such as figure 2 As shown, the thermosetting unsaturated polyester prepared in Example 1 is cut into elements of different shapes, such as figure 2 As shown in (a), heat up to 160°C, apply external force to make good contact between components, and keep the external force for 5 hours. Remove the external force and cool to obtain a composite structure composed of different components, such as figure 2 Shown in (b).

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Abstract

The invention discloses a preparation method, product and application of thermosetting unsaturated polyester resin capable of thermal processing. The thermosetting unsaturated polyester resin is composed of unsaturated polyester oligomer and crosslinking agent containing unsaturated double bonds. , the polymerization initiation system and the transesterification catalyst are composed of four main components. The thermosetting unsaturated polyester of the present invention exhibits the same excellent mechanical properties as conventional thermosetting unsaturated polyesters under normal use conditions; and when reaching a certain temperature, it exhibits good plasticity like ordinary thermoplastics, namely Can be processed again to obtain a new shape. The thermosetting unsaturated polyester involved in the present invention, when it exhibits plastic properties, can maintain its original shape while obtaining a new shape, that is, its shape changes can be superimposed. At the same time, the thermosetting unsaturated polyester proposed by the present invention also has the characteristics of thermal processing combined molding of multi-component products and re-thermal processing after recycling.

Description

technical field [0001] The invention belongs to the field of new functional materials, and in particular relates to a preparation method, product and application of a thermosetting unsaturated polyester resin capable of thermal processing, molding and recovery. Background technique [0002] Unsaturated polyester refers to a polymer compound formed by polycondensation of saturated / unsaturated diols and saturated / unsaturated dibasic acids or anhydrides. The main chain of the molecule contains both ester bonds and unsaturated double bonds. The unsaturated polyester resin is dissolved in the small molecular vinyl monomer, and under the action of the initiator, the double bonds of the main chain can further undergo free radical copolymerization to form a three-dimensional network structure body polymer. [0003] The cured unsaturated polyester resin has excellent mechanical properties, electrical insulation properties and corrosion resistance. It can be used alone or blended with...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F283/01C08F212/08C08L51/08B29C51/18B29C65/00B29B17/00
CPCY02W30/62
Inventor 江永波
Owner JIANGSU RUIKANG NEW MATERIAL TECH CO LTD