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Method for producing polyurethane waterproof coating

A polyurethane waterproofing and production method technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of lack of strength, high cost, high toxicity, etc., and achieve the effect of improving comprehensive mechanical properties and solving volatile

Inactive Publication Date: 2013-01-02
WUJIANG WSD WATERPROOF BUILDING MATERIAL
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Problems solved by technology

[0004] In the current configuration method of conventional polyurethane waterproof coatings, TDI-type polyurethane waterproof coatings (toluene diisocyanate polyurethane waterproof coatings) are mainly used. For this type of coatings, although they meet the requirements of GB / T 19250-2003, toluene Diisocyanate is volatile, so it is highly toxic, and the cost of toluene diisocyanate is relatively high; moreover, for some high-strength construction occasions, the strength of TDI polyurethane waterproof coating is still limited. lacking

Method used

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  • Method for producing polyurethane waterproof coating
  • Method for producing polyurethane waterproof coating
  • Method for producing polyurethane waterproof coating

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Embodiment Construction

[0019] Below in conjunction with accompanying drawing and embodiment the present invention is further described:

[0020] The production method of the polyurethane waterproof coating is as follows: figure 1 Indicated, including the following steps:

[0021] 1. Configure component A and component B according to the mass ratio of 1:2;

[0022] In Example 1, the A component includes: diphenylmethane diisocyanate: 20% (accounting for the mass fraction of A component); polyether 210: 12%; polyether 220: 40%; polyether Ether 230: 18%; 200# solvent oil 10%;

[0023] The B component includes: coumarone 40% (mass fraction), talc powder 24%, silica fume powder 15%, calcium hydroxide 20%, triethylenediamine 1%.

[0024] 2. Mixing and stirring: put each raw material in the first component into a stirring device, and stir for 0.5 hour at room temperature; carry out preliminary mixing of each raw material in the second component in a mixer with a screw conveying mechanism, after mixing ...

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Abstract

The invention provides a method for producing a polyurethane waterproof coating. The method comprises the following steps of 1, blending a component A and a component B according to a mass ratio of 1: 2, wherein the component A comprises: by mass, 18 to 20% of diphenylmethane diisocyanate, 65 to 75% of polyethers and 8 to 12% of 200# solvent oil and the component B comprises: by mass, 35 to 40% of coumarone, 20 to 30% of talcum powder, 14 to 16% of silica fume, 18 to 22% of calcium hydroxide and 0.5 to 1% of a curing agent, 2, putting the raw materials of the component A into a stirring device, stirring at a normal temperature for 0.5 hours, carrying out preliminary mixing of the raw materials of the component B, putting the mixed raw materials of the component B into the stirring device, and stirring for 1 to 2 hours to obtain the polyurethane waterproof coating, and 3, taking out the polyurethane waterproof coating mixed uniformly and putting the polyurethane waterproof coating mixed uniformly into a packaging barrel. The polyurethane waterproof coating obtained by the method volatilizes difficultly and has no toxicity and a low cost. Compared with the conventional polyurethane waterproof coating, the polyurethane waterproof coating obtained by the method has high integrated performances.

Description

technical field [0001] The invention relates to the field of building material production, in particular to a production method of polyurethane waterproof coating. Background technique [0002] The current polyurethane waterproof coatings are mainly isocyanate group-containing prepolymers formed by addition polymerization of isocyanate and polyether, together with catalysts, anhydrous additives, anhydrous fillers, solvents, etc., after mixing and other processes Processed coatings. This type of coating is a reaction-curing (moisture-curing) coating, which has the characteristics of high strength, high elongation, and good water resistance. It has strong adaptability to the deformation of the base layer. [0003] For polyurethane waterproof coatings, it is usually divided into single-component and multi-component, and most of them are two-component. In two-component polyurethane waterproof coatings, the type and proportion of each component will have a greater impact on the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/08C09D7/12C08G18/76
Inventor 张金根
Owner WUJIANG WSD WATERPROOF BUILDING MATERIAL
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