Epoxy resin structural adhesive and preparation method thereof

A technology of epoxy resin and structural adhesive, which is applied in the direction of epoxy resin glue, adhesive, carboxyl rubber adhesive, etc. It can solve the problems of not being able to take into account performance, etc., and achieve small creep, good durable strength, and good corrosion resistance. Effect

Inactive Publication Date: 2010-12-08
强军锋
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] None of the existing structural adhesives can take into account the above properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0066] The preparation method of epoxy resin structural adhesive includes the following steps:

[0067] Weigh component A according to the following parts by weight:

[0068] Bisphenol A type epoxy resin I (epoxy value 0.50~0.54eq / 100g) 60~100 parts,

[0069] Bisphenol A type epoxy resin II (epoxy value 0.41~0.47eq / 100g) 0~40 parts,

[0070] 0-30 parts of carboxy-terminated nitrile rubber,

[0071] Coupling agent 1~2 parts;

[0072] Anti-ultraviolet agent 1~3 parts,

[0073] 5-10 parts of fumed silica,

[0074] 5-10 parts of microcrystalline cellulose,

[0075] Flame retardant 15~35 parts,

[0076] Add 60-100 parts of bisphenol A epoxy resin I and 0-40 parts of bisphenol A epoxy resin II to the mixing tank and stir at low speed, then add 0-30 parts of carboxy-terminated nitrile rubber, coupling agent 1 to 2 parts, 1 to 3 parts of anti-ultraviolet agent, 5 to 10 parts of fumed silica, 5 to 10 parts of microcrystalline cellulose, 15 to 35 parts of flame retardant, high speed after liquid mate...

Embodiment approach 1

[0088] A component:

[0089] 70 parts of bisphenol A epoxy resin I

[0090] Bisphenol A type epoxy resin II 30 parts

[0091] KH550 1.5 copies

[0092] 2 parts of styrenated phenol

[0093] Fumed silica 8 parts

[0094] 22 parts of ammonium polyphosphate

[0095] B component:

[0096] Diethylenetriamine 9.35 parts

[0097] Aminoethylpiperazine 9.35 parts

[0098] Polysulfide rubber 10 parts

[0099] 7 parts of microcrystalline cellulose

[0100] Prepare component A and component B according to the preparation method;

[0101] Then press component A: component B=(70+30+1.5+2+8+22):(9.35+9.35+10+7)=3.74:1 after mixing, the gel time (25℃) 60min, Surface drying time 100min, actual drying time 200min;

[0102] Structural adhesive properties: tensile strength 60.5MPa, elastic modulus 3.1GPa, elongation 2.6%, bending strength 82.6MPa, compressive strength 96.7MPa; structural adhesive bonding performance: steel-steel tensile shear strength 23.2 MPa, steel-steel uneven tearing strength 16.7KN / m, steel-...

Embodiment approach 2

[0104] A component:

[0105] Bisphenol A epoxy resin 1 100 parts

[0106] KH550 1.5 copies

[0107] 2 parts of styrenated phenol

[0108] Fumed silica 8 parts

[0109] 35 parts of ammonium polyphosphate

[0110] B component:

[0111] DMP-30 10 copies

[0112] Polysulfide rubber 50 parts

[0113] Microcrystalline cellulose 7.5 parts

[0114] Prepare component A and component B according to the preparation method;

[0115] Then press component A: component B=(100+1.5+2+8+35):(10+50+7.5)=2.17:1; after mixing, the gel time of the structured gel (25℃) is 55min, and the surface drying time 92min, hard work time 195min;

[0116] Structural adhesive properties: tensile strength 59.3MPa, elastic modulus 2.82GPa, elongation rate 3.1%, bending strength 78.5MPa, compressive strength 92.3MPa; structural adhesive bonding properties: steel-steel tensile shear strength 21.3 MPa, steel-steel uneven pull-off strength 16.2KN / m, steel-steel bonding tensile strength 36.7Mpa.

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Abstract

The invention discloses an epoxy resin structural adhesive and a preparation method thereof, belonging to the technical filed of chemical adhesive preparation. The used raw material consists of a resin system, an adhesive component A and a curing agent system component B, and the component A and component B are completely mixed and then cured at room temperature. The structural adhesive in the invention has the advantages of high strength and toughness, good creep resistance, little creep strain, good fatigue resistance and shock resistance, good heat resistance, medium resistance and corrosion resistance, particularly good muggy and aging resistance, excellent creep rupture strength, enough safety and reliability, good flame retardant property, low stress, high strength, high adhesive force, high reliability and the like, and complies with environmental requirements. The epoxy resin structural adhesive is mainly used for adhering composite materials, such as manufacturing yachts, building houses with composite boards, adhering and manufacturing containers made of large-scale composite materials, and the like.

Description

Technical field [0001] The invention relates to a chemical adhesive, especially an epoxy resin structural adhesive for construction, and belongs to the technical field of chemical adhesive preparation. Background technique [0002] At present, the epoxy resin structural adhesive can form a three-dimensional network structure after curing, showing excellent adhesion and mechanical properties, physical and chemical properties, electrical properties, dielectric resistance and electrical insulation characteristics, and its curing process Low shrinkage, stable size, easy processing and forming, etc., play an increasingly important role in modern new buildings. [0003] The stress of structural adhesive bonding joints exists in the state of "surface force" (mainly shear force and positive tension, etc.) and "line force" state (mainly peel force, etc.), which can be characterized by shear strength and peel strength, respectively. Both types of strength must be high at the same time to ob...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J163/02C09J113/00C09J109/02C09J101/02C09J181/04C09J11/04C09J11/06
Inventor 强军锋
Owner 强军锋
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