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Polyurethane adhesive and manufacturing method and application method thereof

A technology of polyurethane adhesive and manufacturing method is applied in the directions of polyurea/polyurethane adhesive, adhesive, surface pretreatment bonding method, etc., to achieve the effects of high peel strength, less harm to the environment and people, and excellent bonding performance

Inactive Publication Date: 2014-09-10
罗静
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, some adhesives have problems of weak bonding ability, acid and alkali resistance or water resistance.
[0003]Due to the existence of greater harm to the environment and human body and the low peel strength of some adhesives, not resistant to acid and alkali, not resistant to water, and the bonding ability is greatly affected by temperature A series of problems, so it is necessary to improve the existing polyurethane adhesive

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The polyurethane adhesive described in this embodiment is composed of component A and component B. The composition of component A is as follows: 65 parts of triphenylmethane triisocyanate, 4 parts of zinc chloride; the composition of component B is as follows: 110 parts of neoprene parts, 4 parts of calcium oxide, 3 parts of N-phenyl-2-naphthylamine, 90 parts of toluene, and 60 parts of ethyl acetate; all of the above are parts by mass.

[0021] The beneficial effect of the polyurethane adhesive designed in the present invention is that the present invention uses triphenylmethane triisocyanate, a compound among polyisocyanates, as the main raw material and is prepared by adding other modifiers. Not only is the cost low, but it also has many characteristics that other adhesives do not have: the present invention contains strong polar isocyanate groups, so it has excellent bonding performance, excellent bending resistance, impact resistance and other mechanical properties....

Embodiment 2

[0023] The production method of a polyurethane adhesive described in this embodiment is characterized in that: first, the materials of component B are dissolved in the mixed solvent according to the formula, and stirred and mixed; the components A and B are mixed according to A: B = Prepare the adhesive at a ratio of 20:80.

[0024] This manufacturing method has the advantage of simple process.

Embodiment 3

[0026] The method of using a polyurethane adhesive described in this embodiment is characterized in that: first prepare the adhesive and clean the surface of the adherend, then apply the glue, and stick it when the surface of the glue is about to dry but not too dry Then, carry out the second glue coating. When the surface of the glue coated for the second time is about to dry but not too dry, apply a pressure of 0.3MPa, cure for 20min at a temperature of 30°C, and then cure at a temperature of 20°C. Cured for 20min.

[0027] This method of use has the advantage of firm adhesion and is especially suitable for use on leather.

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PUM

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Abstract

The invention discloses a polyurethane adhesive which is composed of a component A and a component B. The component A comprises, by mass, 65 parts of triphenyl methane tri-isocyanate and 4 parts of zinc chloride. The component B comprises, by mass, 110 parts of chloroprene rubber, 4 parts of calcium oxide, 3 parts of N-phenyl-2-naphthylamine, 90 parts of methylbenzene and 60 parts of ethyl acetate. The polyurethane adhesive contains isocyanate groups with strong polarity, so the polyurethane adhesive has excellent adhesive properties and excellent mechanical properties such as bending resistance and impact resistance and has the advantages of high peeling strength, acid and alkali resistance, solvent resistance, water resistance, mould prevention and the like. The polyurethane adhesive still has good adhesion strength at a low temperature and especially can keep constant adhesion strength at an ultralow temperature, and the usage temperature range of the polyurethane adhesive is from minus 30 DEG C to 50 DEG C. The invention further provides a manufacturing method and application method of the polyurethane adhesive.

Description

technical field [0001] The invention relates to an adhesive, especially a polyurethane adhesive and a preparation method thereof. Background technique [0002] Adhesive bonding (bonding, bonding, cementation, gluing) refers to the technology of connecting the surfaces of homogeneous or heterogeneous objects with adhesives, which has the characteristics of continuous stress distribution, light weight, or sealing, and low temperature in most processes. Gluing is especially suitable for the connection of different materials, different thicknesses, ultra-thin specifications and complex components. In the late 20th century, developed countries in the world, represented by American companies, developed polymer composite adhesives based on polymer materials and composite material technology. It is a two-component or multi-component composite material, which is a high-tech discipline developed on the basis of polymer chemistry, colloid chemistry, organic chemistry and material m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/04C09J5/02
Inventor 罗静
Owner 罗静
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