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Adhesive for repairing wood structure of ancient buildings, and preparation method and application method of adhesive

A technology for adhesives and wood structures, applied in the direction of adhesives, bonding methods, adhesive additives, etc., to achieve high promotional value, fast curing speed, and no toxic and harmful gas emissions

Inactive Publication Date: 2019-06-11
BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for the long-term use of the restored wooden components of ancient buildings, the water resistance and mildew resistance of the above-mentioned adhesives need to be further improved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042](1) Add 10 parts by mass of lignocellulose to 100 parts by mass of polyurethane-modified epoxy resin, operate at room temperature, and stir for 10 minutes at a stirring speed of 2400 rpm;

[0043] (2) Add 47 parts by mass of curing agent modified amine (VT6110) to the system made in (1), and tris(dimethylaminomethyl)phenol of 2 parts by mass of curing accelerator, operate at room temperature, and stir at 1000 rpm Under the condition of / min, stir for 5 minutes to obtain an epoxy resin-based adhesive.

[0044] The tensile shear strength of the wood sample bonded with the epoxy resin-based adhesive in Example 1 was 8.86 MPa.

Embodiment 2

[0046] (1) Add 15 parts by mass of hollow glass microspheres to 100 parts by mass of polyurethane-modified epoxy resin, and stir for 10 minutes at an operating temperature of 25°C and a stirring speed of 2400 rpm;

[0047] (2) Add 47 parts by mass of curing agent modified amine (VT6110) to the system made in (1), then add 2 parts by mass of curing accelerator tris(dimethylaminomethyl)phenol to operate at room temperature, stirring speed 2000 Under the condition of rpm, stir for 5 minutes to obtain an epoxy resin-based adhesive.

[0048] The tensile shear strength of the wood sample bonded with the epoxy resin-based adhesive in Example 2 was 6.21 MPa.

Embodiment 3

[0050] (1) 30 mass parts of silicon micropowder are added to 100 mass parts of polyurethane-modified epoxy resin, operated at room temperature, and stirred for 10 minutes at a stirring speed of 2400 rpm;

[0051] (2) Add 47 parts by mass of curing agent modified amine (VT6110) to the system prepared in (1), and then add 2 parts by mass of curing accelerator tris(dimethylaminomethyl)phenol, at an operating temperature of 25°C, stir Stir for 5 minutes at a speed of 1000 rpm to obtain an epoxy resin-based adhesive.

[0052] The tensile shear strength of the wood sample bonded with the epoxy resin-based adhesive in Example 3 was 4.50 MPa.

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PUM

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Abstract

The invention discloses an adhesive for repairing a wood structure of ancient buildings, and a preparation method and application method of the adhesive. The adhesive for the wood structure of the ancient building is prepared from epoxy resin, a modified amine curing agent, tris(dimethylaminomethyl)phenol, plant fibers, hollow microbeads, other extender pigment and an active diluent. The preparation and use method of the adhesive comprises the following steps: mixing the epoxy resin, the plant fibers, the hollow microbeads, the active diluent and the like according to a certain ratio, then adding the modified amine and the tris(dimethylaminomethyl)phenol according to a certain ratio, and completing adhesion within 40 minutes. The adhesive has the characteristics that the curing speed is high, no toxic or harmful gas is released, the adhesive property is excellent, and the like, and has relatively high popularization value in the field of ancient buildings.

Description

technical field [0001] The invention relates to an ancient building repairing material technology, in particular to an adhesive used for repairing ancient building wooden structures and a preparation and use method thereof. Background technique [0002] In the process of protecting the wooden structure of ancient buildings, many reasons will lead to diseases, which can be divided into various forms according to their hazards: cracks, decay, bending deformation, pulling out tenons, tilting columns, and foundation damage. Except for a small part caused by human factors, a large number of wooden structure damages mainly come from factors such as the aging, degradation, insect infestation and natural disasters of the materials themselves. [0003] The protection of ancient buildings should follow the following principles: adhere to the authenticity of building materials; adhere to the minimum intervention and in situ protection; adhere to the authenticity of architectural techno...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/04C09J11/04C09J11/06C09J11/08C08G18/58C09J5/00
Inventor 高大海戴玉华刘成曾海兵
Owner BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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