One-component polyurethane waterproof coating for facade spraying and preparation method thereof

A polyurethane waterproof, one-component technology, applied in the field of coatings, to achieve uniform film formation, reduce construction labor costs, and enhance the strength of the coating film

Active Publication Date: 2018-02-27
南通科顺建筑新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is a great demand for non-sag polyurethane waterproof coatings for facades or slopes. However, it is difficult to meet the two requirements of "no-sag" and "can be sprayed" at the same time, and there is no suitable one on the market. Non-sag, spray-appliable polyurethane waterproof coating for façades or slopes

Method used

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  • One-component polyurethane waterproof coating for facade spraying and preparation method thereof
  • One-component polyurethane waterproof coating for facade spraying and preparation method thereof
  • One-component polyurethane waterproof coating for facade spraying and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A kind of facade spraying one-component polyurethane waterproof coating, by weight, is composed as follows:

[0037] components

parts by weight

Polyether diol DL-2000D

22

Polyether Triol 330N

6

Diisocyanate TDI-80

1.5

[0038] Diisocyanate MDI-50

2

Diisocyanate MDI-100

4

Chlorinated paraffin

20

Diisononyl phthalate

3

1250 mesh talcum powder

17

800 mesh talcum powder

20

Titanium dioxide

2

carbon black

0.05

Dimethylthiotoluenediamine

0.3

reactive thixotropic agent

0.5

Organotin Catalyst T-12 (Dibutyltin Dilaurate)

0.1

Defoamer BYK-066N

0.1

trimethylbenzene

5

Dimethyl carbonate

5

[0039] The preparation method is:

[0040] (1) Add polyether polyols, plasticizers, pigments and fillers, and chain extenders into the reaction vessel, disperse evenly at high speed, stir and heat up to ...

Embodiment 2

[0046] A kind of facade spraying one-component polyurethane waterproof coating, by weight, is composed as follows:

[0047] components

parts by weight

Polyether diol DL-2000D

22

Polyether Triol 330N

6

Diisocyanate TDI-80

1.5

Diisocyanate MDI-50

2

Diisocyanate MDI-100

4

Chlorinated paraffin

20

Diisononyl phthalate

3

1250 mesh talcum powder

17

800 mesh talcum powder

20

Titanium dioxide

2

[0048] carbon black

0.05

4,4'-Diamino-3,3'-dichlorodiphenylmethane

0.3

reactive thixotropic agent

0.5

Organotin Catalyst T-12 (Dibutyltin Dilaurate)

0.1

Defoamer BYK-066N

0.1

trimethylbenzene

4

Dimethyl carbonate

5

[0049] The preparation method is:

[0050] (1) Add polyether polyols, plasticizers, pigments and fillers, and chain extenders into the reaction vessel, disperse evenly at high speed, stir an...

Embodiment 3

[0056] A kind of facade spraying one-component polyurethane waterproof coating, by weight, is composed as follows:

[0057] components

parts by weight

Polyether diol DL-2000D

20

Polyether Triol 330N

6

Diisocyanate MDI-50

3

Diisocyanate MDI

4

Chlorinated paraffin

17

Diisononyl phthalate

3

800 mesh talcum powder

20

1250 mesh talcum powder

17

Titanium dioxide

2

carbon black

0.05

Dimethylthiotoluenediamine

0.2

reactive thixotropic agent

0.7

stannous octoate

0.2

Defoamer BYK-066N

0.3

Propylene glycol methyl ether acetate

5

Butyl acetate

6

[0058] The preparation method is:

[0059] (1) Add polyether polyols, plasticizers, pigments and fillers, and chain extenders into the reaction vessel, disperse evenly at high speed, stir and heat up to 100°C, and dehydrate for 2 hours under the condition of vacuum degree...

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Abstract

The invention provides a one-component polyurethane waterproof coating for facade spraying and a preparation method thereof. The coating comprises the following components: 22-26 parts by weight of polyether polyol, 6-8 parts by weight of diisocyanate, and 20-20 parts by weight of plasticizer 25 parts by weight, 35-40 parts by weight of pigments and fillers, 0.1-0.3 parts by weight of chain extenders, 0.5-1 parts by weight of reactive thixotropic agents, 0.1-0.2 parts by weight of catalysts, 0.1-0.3 parts by weight of defoamers, and 9 parts by weight of solvents ~11 parts by weight; the chain extender is selected from 4,4'-diamino-3,3'-dichlorodiphenylmethane or dimethylthiotoluenediamine; the reactive thixotropic agent has a solid content of 48 ~52% polyurea solution. Compared with the prior art, the invention solves the problem of running and hanging of the polyurethane waterproof coating when it is applied on the facade and slope; it can be applied by spraying, which effectively reduces the construction labor cost, especially on the facade.

Description

Technical field: [0001] The invention belongs to the field of coatings, in particular to a facade spraying single-component polyurethane waterproof coating and a preparation method thereof. Background technique: [0002] At present, some large-scale projects in China, such as basement walls of large-scale system venues, tunnels, subways, high-speed rails, civil air defense, etc., require waterproofing construction on facades or slopes. However, due to the facade or slope surface, the construction is inconvenient and prone to quality problems. With waterproof paint, a seamless waterproof layer can be formed, but when the general-purpose paint is applied to the facade or slope, it will flow, causing the upper part to be thin and the lower part to be thick. The thickness of the upper coating film is not enough, and the surface thickness of the coating film is uneven. If you want to paint a coating film with a thickness of 1.5-2.0mm, you may need to paint it seven or eight tim...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/08C08G18/66C08G18/48C08G18/32
Inventor 陈伟忠陈立义方勇龚兴宇陈忠贤
Owner 南通科顺建筑新材料有限公司
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