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Uncured polyurethane waterproofing coating and preparation method thereof

A polyurethane waterproof and non-curing technology, applied in the field of polyurethane waterproof coatings, can solve the problems of limiting the improvement and improvement of waterproof engineering quality, difficulty in finding the source of leakage, difficulty in repair work, etc., achieving good fluidity and reducing the probability of water leakage , The effect of preventing water channeling

Active Publication Date: 2014-07-16
浙江鲁班建材科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But another problem has arisen from this, that is, once the waterproof layer produces small holes or cracks in a certain part and leaks water, there will be water channeling under the waterproof layer, resulting in multiple leaks in the room, and it is difficult to find the leak. The source of the leakage brings great difficulty to the repair work
[0006] The problems in these material properties and the lack of technology limit the improvement and improvement of the quality of waterproofing projects. It is urgent to propose a complete solution to solve the above problems.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034]The present invention can use non-curing (creep) polyurethane waterproof coating raw material each component ratio as follows:

[0035] Polyurethane prepolymer 18.4% (of which, based on polyurethane prepolymer as the total amount, polyether diol 80%, isocyanate 18%, polyether triol 2%)

[0036] Bitumen 56% Maleic anhydride 5%

[0037] 3-Hydroxyethyl-1,3-oxazolidine 1.5% Styrene Butadiene Rubber (SBR) 5%

[0038] Talc 14.1%

[0039] The preparation method of above-mentioned non-curing polyurethane waterproof coating is as follows:

[0040] 1) Add styrene-butadiene rubber thermoplastic elastomer to the asphalt according to the amount of feed to make the asphalt swell and soften;

[0041] 2) Heat the softened asphalt and maleic anhydride to 180°C, stir for 120 minutes, and put it into a colloid mill for 40 minutes to obtain modified asphalt for later use;

[0042] 3) Add polyether diol and polyether triol into the reaction kettle according to the formula, start stirring...

Embodiment 2

[0048] Example 2 The ratio of each component of the raw materials of the non-curing polyurethane waterproof coating is as follows:

[0049] Polyurethane prepolymer 15% (of which, based on the total amount of polyurethane prepolymer, polyether diol 99%, isocyanate 0.8%, polyether triol 0.2%)

[0050] Bitumen 55% Fatty acid polyoxyethylene ester 5%

[0051] 2-Isopropyl-3-hydroxyethyl-1,3-oxazolidine 1.3%

[0052] Thermoplastic Elastomer (SBS) 5% Wollastonite Powder 18.7%

[0053] The preparation method of above-mentioned non-curing polyurethane waterproof coating is as follows

[0054] The preparation method is as in Example 1, wherein the asphalt and compatibilizer are heated to 210° C., stirred for 60 minutes, and then put into a colloid mill for 20 minutes.

[0055] Adhesive performance: 100% cohesive failure Heat resistance: 75°C

[0056] Low temperature flexibility: creep performance under shear state at -20°C 0.5 N / mm

Embodiment 3

[0058] The ratio of each component of the raw materials of the non-curing polyurethane waterproof coating is as follows:

[0059] Polyurethane prepolymer 13% (of which, based on polyurethane prepolymer as the total amount, polyether diol 90%, isocyanate 1%, polyether triol 9%)

[0060] Bitumen 60% Methacrylic acid 7%

[0061] 3-Hydroxyethyl-1,3-oxazolidine 1.3% Neoprene (CR) 6%

[0062] Wollastonite powder 12.7%

[0063] The preparation method is as in Example 1, wherein the asphalt and compatibilizer are heated to 200° C., stirred for 50 minutes, and then put into a colloid mill for 30 minutes.

[0064] Physical properties: Adhesive properties: 100% cohesive failure Heat resistance: 85°C

[0065] Low-temperature flexibility: creep performance of 0.7 N / mm in shear at -30°C.

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Abstract

The invention discloses an uncured polyurethane waterproofing coating and a preparation method thereof, belonging to the technical field of polyurethane waterproofing coatings. The uncured polyurethane waterproofing coating is prepared from the following raw materials in percentage by weight: 13-20% of prepolymer, 30-65% of asphalt, 1.0-1.5% of latent curing agent, 3-15% of compatilizer, 2-9% of thermoplastic elastomer and 0-3% of powder stuffing, wherein prepolymer is a substance synthesized by reaction between polyether and isocyanate. The uncured polyurethane waterproofing coating mainly aims to improve the material proportion and polymerization process of polyurethane, and the problem that a hot-melted asphalt material is needed to be heated by using a machine is solved; the uncured polyurethane waterproofing coating is convenient in construction and good in flowability; the viscosity of the constructed material can be automatically enhanced, so that the constructed material can become an elastic plastic body and a favorable waterproofing layer without internal stresses; in addition, the uncured polyurethane waterproofing coating can be well bonded with a coiled material and can be compounded to be waterproof so as to form a waterproofing layer capable of overcoming tension fracture caused by basement layer cracking and preventing puncturing; the uncured polyurethane waterproofing coating is simple and convenient in process, rapid in construction, free of maintenance, high in working efficiency and capable of becoming the development direction of building waterproofing in the further.

Description

technical field [0001] The invention belongs to the technical field of polyurethane waterproof coatings, and in particular relates to a non-curing polyurethane waterproof coating and a preparation method thereof. Background technique [0002] Polymer waterproof coating is an excellent material for waterproofing. The currently used polymer coatings are water-emulsified emulsion-based water-emulsion coatings. It uses cold construction technology, but its solid content is low, generally not exceeding (60-70%) , The thickness of each application is limited by the curing conditions, it is impossible to be very thick, and the film needs to be applied multiple times. Under humid conditions, the water in the emulsion cannot be volatilized, resulting in the inability to cure, so it is very inconvenient. [0003] Modified asphalt coils such as SBS and APP coils are currently popular in the market. It requires a flame spray gun to carry out on-site surface heat fusion, an open flame i...

Claims

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Application Information

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IPC IPC(8): C09D195/00C09D175/08C09D7/12C09D5/00C08G18/48C08G18/12
Inventor 陆优民徐益平项晓睿
Owner 浙江鲁班建材科技股份有限公司
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