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Active group containing polyacrylate flexibilizer, preparation method thereof and epoxy resin adhesive modified by same

A polyacrylate, reactive group technology, used in epoxy resin adhesives, adhesives, adhesive additives, etc., can solve the problem of low shear strength and peel strength, cannot be used as structural adhesives, and epoxy resin adhesives have poor heat resistance. and other problems, to achieve the effect of good shear strength and peel strength, excellent shear strength and peel strength, and excellent performance

Inactive Publication Date: 2011-03-30
INST OF PETROCHEM HEILONGJIANG ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the epoxy resin adhesive obtained by toughening and modifying existing polyacrylate oligomers has poor heat resistance, low shear strength and peel strength, and cannot be used as a structural adhesive. The present invention provides A kind of active group-containing polyacrylate toughening agent, its preparation method and epoxy resin adhesive modified by it

Method used

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  • Active group containing polyacrylate flexibilizer, preparation method thereof and epoxy resin adhesive modified by same
  • Active group containing polyacrylate flexibilizer, preparation method thereof and epoxy resin adhesive modified by same
  • Active group containing polyacrylate flexibilizer, preparation method thereof and epoxy resin adhesive modified by same

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specific Embodiment approach 1

[0015] Embodiment 1: This embodiment is a polyacrylate toughening agent containing active groups. The polyacrylate toughening agent containing active groups consists of 60 to 75 parts of soft monomer, 15 to 25 parts of hard monomer in parts by weight. Monomer, 5-15 parts of functional monomer, epoxy resin E-51 dispersion medium equal to the total weight of monomer, benzoyl peroxide initiator accounting for 3%-5% of total monomer weight, accounting for monomer It is obtained by reacting 1% to 3% of dodecyl mercaptan chain transfer agent and 0.5% of hydroquinone chain terminator accounting for the total weight of the monomers. The molecular weight of the polyacrylate toughening agent is 3000 to 5000; wherein The total weight of the monomer refers to the weight sum of the soft monomer, the hard monomer and the functional monomer, and the total weight of the control monomer is 100 parts; wherein, the soft monomer is butyl acrylate (BA) or isooctyl acrylate ester (EHA), the hard mo...

specific Embodiment approach 2

[0017] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the polyacrylate toughening agent containing active groups consists of 70-75 parts of soft monomer, 18-25 parts of hard monomer, 5-25 parts by weight. 9 parts of functional monomers, epoxy resin E-51 dispersion medium equal to the total weight of the monomers, benzoyl peroxide initiator accounting for 3% to 5% of the total weight of the monomers, accounting for 1% to 5% of the total weight of the monomers It is obtained by reacting 3% of dodecyl mercaptan chain transfer agent and 0.5% of hydroquinone chain terminator accounting for the total weight of monomers, wherein the functional monomer is acrylic acid (AA). Other parameters are the same as in the first embodiment.

specific Embodiment approach 3

[0018]Specific embodiment three: the difference between this embodiment and specific embodiment one is that the polyacrylate toughening agent containing active groups consists of 60-75 parts of soft monomer, 15-25 parts of hard monomer, 10-25 parts by weight. 15 parts of functional monomers, epoxy resin E-51 dispersion medium equal to the total weight of the monomers, benzoyl peroxide initiator accounting for 3% to 5% of the total weight of the monomers, accounting for 1% to 5% of the total weight of the monomers It is obtained by reacting 3% of dodecyl mercaptan chain transfer agent and 0.5% of hydroquinone chain terminator accounting for the total weight of monomers, wherein the functional monomer is glycidyl methacrylate (GMA). Other parameters are the same as in the first embodiment.

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Abstract

The invention relates to an active group containing polyacrylate flexibilizer, a preparation method thereof and epoxy resin adhesive modified by the flexibilizer. The invention solves the problems that the existing polyacrylate modified epoxy resin adhesive has poor heat resistance, shear strength and peel strength are low, and the existing adhesive can not be used as structural adhesive. The flexibilizer is obtained by reaction of monomer, dispersion medium, initiator, chain transfer agent and chain terminator. Half of mixed solution of monomer and initiator and dispersion medium are added into a reactor, and then the rest of mixed solution and the chain transfer agent are added into the reactor, and finally the chain terminator is added, thus obtaining the flexibilizer by reaction. The adhesive contains component A and curing agent as well as component C DMP-30; wherein the component A is composed of flexibilizer and epoxy resin. The flexibilizer modified adhesive of the invention has good heat resistance, shear strength at 25 DEG C can reach 44.7MPa, and peel strength at 25 DEG C can reach 8.24kN / m. The adhesive of the invention can be used as structural adhesive.

Description

technical field [0001] The invention relates to a polyacrylate toughening agent, a preparation method thereof and an epoxy resin adhesive modified therewith. Background technique [0002] Epoxy resin adhesive is an adhesive with good bonding performance, corrosion resistance, insulation, high strength and other properties, but its cured substance is brittle and difficult to meet the needs of some engineering technologies. The toughening modification of epoxy resin has always been the focus of research on the toughening modification of epoxy resin adhesives, and a lot of research has been carried out at home and abroad. Toughening epoxy resins by using liquid rubber with reactive functional groups on the main structure is a research hotspot in recent years. For example, CTBN, HTBN, etc., can use their reactive functional groups to react with the main structure of epoxy resin to form prepolymers, and the toughness of the system can be improved with little loss of thermal and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J11/08C08F220/18C08F220/44C08F220/14C08F212/08C08F220/06C08F220/32C09J163/00
Inventor 张斌张绪刚孙明明李坚辉王磊
Owner INST OF PETROCHEM HEILONGJIANG ACADEMY OF SCI
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