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A kind of mixing molding method of epoxy resin and unsaturated resin

An epoxy resin, hybrid molding technology, applied in coatings, polyester coatings, polyurea/polyurethane coatings, etc., can solve the problem of directly molding unsaturated resin systems, unable to form interface bonding, and limiting epoxy resin and unsaturated Resin application scenarios and other issues

Active Publication Date: 2020-06-09
泰州市天润合成化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, since the cured product of the epoxy resin-amine curing agent system has a polymerization inhibition effect on free radical polymerization, if the unsaturated resin is directly molded on the surface of the amine-cured epoxy resin, effective interfacial bonding cannot be formed.
In addition, direct molding of epoxy resin on the surface of unsaturated resin that is not fully cured can not form effective interface bonding.
At this stage, it is generally only possible to directly form an epoxy resin-amine curing agent system on the surface of a fully cured unsaturated resin and its composite material; it is impossible to directly form an unsaturated resin on the surface of an already formed epoxy resin / amine curing agent system. Resin system; it is also impossible to directly form an epoxy resin / amine curing agent system on the surface of an unsaturated resin that is not fully cured; this limits the application scenarios of hybrid molding of epoxy resin and unsaturated resin

Method used

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  • A kind of mixing molding method of epoxy resin and unsaturated resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] On the surface of the glass fiber reinforced epoxy resin / amine curing agent system composite material, a transition layer is applied. The transition layer consists of trimethylolpropane glycidyl acrylate and MDI curing agent. After the transition layer is cured, a layer of repair putty based on unsaturated polyester resin is applied.

[0016] After 48 hours at room temperature, test the adhesion of the repair putty.

Embodiment 2

[0018] Use the paste epoxy wood to prepare a flat plate, and place it at room temperature for 24 hours. After the epoxy wood is cured, use the CNC machine tool to process the surface of the epoxy wood into a plane. Coat a layer of transition layer on the surface of processed epoxy substitute wood. The transition layer is composed of bisphenol A epoxy resin acrylate, MDI curing agent and appropriate amount of solvent. After the transition layer is cured, a layer of air-drying gel coat based on unsaturated polyester resin is applied.

[0019] After 48 hours at room temperature, test the adhesion of the gel coat.

Embodiment 3

[0021] Spray a layer of unsaturated polyester resin gel coat on the mold, and apply a transition layer after the gel coat is initially cured. The transition layer is composed of hydroxyl-terminated unsaturated polyester resin, MDI curing agent and appropriate amount of solvent. After the transition layer is cured, an epoxy / amine curing agent system is used to create a layer of glass fiber reinforced composite.

[0022] After standing at room temperature for 48 hours, remove the mold and test the adhesion of the gel coat.

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Abstract

The invention discloses a method for realizing product molding by mixing epoxy resin and unsaturated polyester resin. The method comprises steps as follows: a transition layer is added between an epoxy resin / amine curing agent system and the unsaturated polyester resin to improve adhesive strength between the unsaturated polyester resin and the epoxy resin / amine curing agent system. Due to the fact that amine cured epoxy resin has a polymerization retardation function on free radical cured unsaturated polyester resin, effective interfacial adhesion cannot be formed between the epoxy resin / amine system and theunsaturated polyester resin when theunsaturated polyester resin is directly applied to the surface of the amine cured epoxy resin or the epoxy resin / amine system is directly utilized while the unsaturated polyester resin is not cured sufficiently, and the application of mixed molding of the epoxy resin and the unsaturated polyester resin is limited. The problem can be effectively solvedby adding the transition layer capable of forming chemical bonds with an epoxy / amine system and capable of formingchemical bonds with the free radical cured unsaturated polyester resin between the amine cured epoxy resin and the unsaturated polyester resin.

Description

technical field [0001] The invention belongs to the field of macromolecular materials, and relates to a mixing molding method of epoxy resin and unsaturated resin. Background technique [0002] As a commonly used high-performance thermosetting resin, epoxy resin has been widely used in adhesives, composite materials and other fields due to its excellent adhesion, strength and other properties. For normal temperature molding of epoxy resin, aliphatic amines, alicyclic amines and their mixtures and modified products are generally used as curing agents. Unsaturated resins, including unsaturated polyester resins, polyurethane acrylate resins, epoxy acrylate resins, vinyl resins, etc., are cured by free radical polymerization, so they are easy to cure and have good manufacturability. Materials, coatings and other fields have a wide range of applications. [0003] In some occasions, since epoxy resins and unsaturated resins have their own performance characteristics, they need t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J7/04C09D175/14C09D167/06C08L63/00
CPCC08J7/042C08J2363/00C08J2467/06C08J2475/14
Inventor 刘伟
Owner 泰州市天润合成化工有限公司