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Method for preparing single-component polyurethane waterproof paint by using hydrocarbon oil

A polyurethane waterproof, one-component technology, used in polyurea/polyurethane coatings, antifouling/underwater coatings, coatings, etc., can solve problems that affect product use and development, affect product quality, and have no profit, and achieve improvement. Storage stability and workability, resource utilization, and low price

Active Publication Date: 2012-07-11
BEIJING BUILDING MATERIALS ACADEMY OF SCI RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the polyether is not vacuum dehydrated before the polymerization reaction, and the pigments and fillers are not dehydrated together with the polyether, the trace moisture brought by the polyether and the pigments and fillers makes the one-component polyurethane waterproof coating easy to condense during storage. Leather, poor stability, easy to foam during construction, affecting product quality
In addition, due to the impact of the international oil market in recent years, the prices of major raw materials such as polyether polyols and toluene diisocyanate have increased rapidly, especially the price of toluene diisocyanate has increased by nearly 100%, while the sales price of one-component polyurethane waterproof coatings has increased Very small, only a few percent, resulting in basically no profit for the product, and seriously affecting the use and development of the product

Method used

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Experimental program
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Effect test

Embodiment

[0028] At first selected the present invention utilizes hydrocarbon oil to prepare the raw material formula (weight %) of one-component polyurethane waterproof coating:

[0029] Polyether 2000 19.5;

[0030] Polyether 330N 12.5;

[0031] Hydrocarbon oil 10.75;

[0032] Bentonite 0.5;

[0033] Talc 47.5;

[0034] Benzoyl chloride 0.05;

[0035] Toluene diisocyanate 5;

[0036] Carbon black paste 4;

[0037] Dibutyltin dilaurate 0.2.

[0038] After the ratio of raw materials is selected, the specific production process is carried out:

[0039] First, add polyether 2000, polyether 330N and hydrocarbon oil into the reaction kettle, start stirring, and raise the temperature to 50°C, add bentonite and talcum powder, continue to heat up the mixture in the reaction kettle to 120°C, and the vacuum degree is 0.06MPa vacuum for 2 hours. Then lower the temperature to 60°C, add benzoyl chloride and toluene diisocyanate, then raise the temperature to 85°C, stir and react for 3 hour...

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PUM

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Abstract

The invention discloses a method for preparing single-component polyurethane waterproof paint by using hydrocarbon oil. The method comprises processes of mixing and production of raw materials. The hydrocarbon oil improved single-component polyurethane waterproof paint prepared by the method has the characteristic of realizing resource utilization of the hydrocarbon oil. Compared with the prior single-component polyurethane waterproof paint, the single-component polyurethane waterproof paint saves large amount of petrochemical resource and reduces the material cost. In addition, the tensile strength and breaking elongation performance of the paint are remarkably improved, so the method remarkably improves the waterproof effect of the paint.

Description

Technical field [0001] The invention relates to the production technical category of one-component polyurethane waterproof coating, in particular, relates to a method for preparing one-component polyurethane waterproof coating by using hydrocarbon oil. Background technique [0002] At present, domestic single-component polyurethane waterproof coatings mainly use polyether polyols and toluene diisocyanate (TDI) as raw materials to prepare polyurethane prepolymers through polymerization reactions, and then add pigments and fillers, plasticizers, defoamers, and catalysts. become. However, since the polyether is not vacuum dehydrated before the polymerization reaction, and the pigments and fillers are not dehydrated together with the polyether, the trace moisture brought in by the polyether and the pigments and fillers makes the one-component polyurethane waterproof coating easy to condense during storage. Skin, poor stability, easy to foam during construction, affecting produc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/08C09D5/16C08G18/48C08G18/24
Inventor 路国忠
Owner BEIJING BUILDING MATERIALS ACADEMY OF SCI RES
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