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Aspartate polyurea adhesive and preparation method thereof

A technology of aspartic acid ester and adhesive, which is applied in the direction of polyurea/polyurethane adhesive, adhesive, non-polymer adhesive additive, etc., which can solve the problem of restricting use, reducing the bonding effect of substrates, affecting product appearance or Sealing performance and other issues to achieve the effect of improving appearance, strong adhesion, and excellent corrosion resistance

Inactive Publication Date: 2019-09-20
上海汉司实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the curing process of two-component polyurethane adhesives, isocyanate is easy to react with water vapor in the air or moisture absorbed by polyols, causing bubbles to form on the cured adhesive layer or surface, thereby affecting the appearance, bonding strength and sealing of the product. performance, which limits its use in certain higher temperature and humidity environments
[0004] For example, in the manufacturing fields of SMC, RTM and other composite materials bonding, aluminum honeycomb and other sandwich panel bonding, due to the use of two-component polyurethane adhesives in humid environments or during rainy seasons, often due to bubbles in the adhesive layer, it is greatly reduced. Adhesive effect on substrates; such as some small and medium-sized electronic components, LED flexible light strips, crystal signs, household water purification filters and other products that have high requirements on appearance, when using two-component polyurethane sealant for potting, often Due to moisture, many tiny bubbles are generated on the surface of the colloid, which affects the appearance or sealing performance of the product

Method used

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  • Aspartate polyurea adhesive and preparation method thereof
  • Aspartate polyurea adhesive and preparation method thereof
  • Aspartate polyurea adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0030] In the embodiment of the present invention, an aspartic acid ester type polyurea adhesive, the mass ratio of component A to component B is 245:100, component A includes NH1420, fumed silica, defoamer WE-D980 , catalyst DBTDL, calcium carbonate, wherein, NH1420, fumed silica, defoamer WE-D980, catalyst DBTDL, calcium carbonate mass ratio is 200:2:0.4:0.02:200, B component includes N100.

[0031] The preparation method of aspartic acid ester type polyurea adhesive described in the present embodiment, the steps are as follows:

[0032] 1) take each raw material by proportioning;

[0033] 2) Preparation of component A: Add NH-1420, fumed silica, defoamer WE-D980, and catalyst DBTDL in sequence in a dry and clean reaction bottle equipped with a stirring device and a vacuum device, and set stirring after the addition is complete The speed is 500-800 rpm, the vacuum degree is -0.098Mpa, after mixing evenly, add calcium carbonate, continue to stir and vacuumize after the addit...

Embodiment 2

[0043] In the embodiment of the present invention, an aspartic acid ester type polyurea adhesive, the mass ratio of A component to B component is 100:110, A component includes NH1420, defoamer BYK-066N, wherein, NH1420, defoamer Foaming agent BYK-066N mass ratio is 200:1, B component includes N3900, polyether NJ-220, thinner TXIB, wherein, the mass ratio of N3900, polyether NJ-220, thinner TXIB is 120:80:20 .

[0044] The preparation method of aspartic acid ester type polyurea adhesive described in the present embodiment, the steps are as follows:

[0045] 1) take each raw material by proportioning;

[0046] 2) Preparation of component A: In a dry and clean reaction bottle equipped with a stirring device, add NH1420 and defoamer BYK-066N in sequence, and stir evenly after adding, to prepare component A;

[0047] 3) Preparation of component B: Add N3900 into a dry and clean three-necked reaction flask equipped with a heating device, a stirring device, and a vacuuming device, ...

Embodiment 3

[0056] In the embodiment of the present invention, an aspartic acid ester type polyurea adhesive, the mass ratio of A component to B component is 100:30, A component includes NHQ6220, NHQ620, plasticizer DI, defoamer WE- The mass ratio of D980, silane coupling agent A-1120, NHQ6220, NHQ620, plasticizer DI, defoamer WE-D980, silane coupling agent A-1120 is 140:60:20:1:2, the B Components include N3900.

[0057] The preparation method of aspartic acid ester type polyurea adhesive described in the present embodiment, the steps are as follows:

[0058] 1) take each raw material by proportioning;

[0059] 2) Preparation of component A: Add NHQ6220, NHQ620, plasticizer DI, defoamer WE-D980, and silane coupling agent A-1120 in sequence in a dry and clean reaction bottle equipped with a stirring device and a vacuum device After the addition, set the stirring speed to 500-800 rpm, the vacuum degree to -0.098Mpa, and mix evenly to obtain component A;

[0060] 3) Preparation of compon...

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Abstract

The invention discloses an aspartate polyurea adhesive, relates to the technical field of adhesive preparation and mainly aims to solve the problems that the adhesive strength, the appearance or the sealing performance of a conventional polyurethane adhesive are affected as an adhesive layer or surface has multiple fine bubbles caused by wet vapor. The aspartate polyurea adhesive disclosed by the invention is formed by mixing of a component A and a component B in a mass ratio of 100:(10-1000), wherein the component A comprises a polyaspartic ester; and the component B comprises an aliphatic or alicyclic diisocyanate monomer, dimer or trimer or a prepolymer of the monomer, dimer or trimer. The invention further discloses a preparation method of the aspartate polyurea adhesive. Compared with a common polyurethane adhesive, the aspartate polyurea adhesive disclosed by the invention is not sensitive to wet vapor and is excellent in property such as corrosion resistance and yellowing resistance, and a polyurea structure generated through a reaction has good adherence to a substrate when being compared with a carbamate structure.

Description

technical field [0001] The invention relates to the technical field of adhesive preparation, in particular to an aspartic acid ester type polyurea adhesive and a preparation method thereof. Background technique [0002] Adhesive is a kind of substance that can bond two or more materials together, and has a certain bonding strength and sealing performance after curing. It can be classified into sealant, structural adhesive, caulking adhesive, etc. , Classified according to the type of resin, common epoxy adhesives, silicone adhesives, polyurethane adhesives, etc. [0003] Polyurethane adhesives are widely used due to their excellent adhesive properties to metals, rubber, glass, ceramics, plastics, wood, fabrics, leather and other materials. However, during the curing process of two-component polyurethane adhesives, isocyanate is easy to react with water vapor in the air or moisture absorbed by polyols, causing bubbles to form on the cured adhesive layer or surface, thereby a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/02C09J11/04
CPCC08K2003/265C08K2201/011C09J11/04C09J175/02C08K3/26
Inventor 杨再军吴海平向劲松
Owner 上海汉司实业有限公司
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