Environmental protection type coating material and preparaton method

A kind of waterproof coating and environment-friendly technology, applied in the direction of antifouling/underwater coating, polyurea/polyurethane coating, coating, etc., can solve the problems of environmental pollution and insufficient strength of waterproof materials, achieve low price and reduce the impact of high temperature , excellent weather resistance

Inactive Publication Date: 2008-07-30
FUJIAN NANGUANG LIGHT IND
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] 1. Purpose of the invention: the present invention provides an environmentally friendly waterproof coating and its preparation method, the purpose of which is to solve the problems of existing waterproof materials in terms of environmental pollution, weather resistance, aging resistance, elasticity, and insufficient strength.

Method used

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  • Environmental protection type coating material and preparaton method

Examples

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Effect test

Embodiment 1

[0025] Embodiment 1: Add 7.8Kg polyether N-220 of castor oil 34.2Kg through the qualified castor oil in the reactor, stir and heat up to 40-50 ℃, add 42Kg polymethyl polyphenyl polyisocyanate (PAPi), more Methylene polyphenyl polyisocyanate (PAPi): the molar ratio of castor oil is 1: 1 ~ 2, then slowly rise to 75-80 ℃, constant temperature reaction 2.5-3 hours, sampling analysis prepolymer -NCO group content and Viscosity, depending on the viscosity, adjusted with solvent butyl acetate, cooled to 50°C, filtered and packaged. -NCO% content is 4-5; viscosity (coating -4 cups) is 35 seconds; test results: tensile strength: 19.4MPa, elongation: 600%, and other excellent properties.

Embodiment 2

[0026] Example 2: Put a total of 100Kg of treated polyether N-220 and polyether 330N in a reaction kettle, raise the temperature to 40°C, add 30Kg of toluene diisocyanate (TDi) and 30Kg of butyl acetate mixture, and slowly warm to 75-80°C ℃, keep the temperature for 3 hours, take a sample to analyze the prepolymer-NCO group content and viscosity, adjust with the solvent butyl acetate according to the viscosity, cool down to 50 ℃, filter and pack. -NCO% content is 4.2; tensile strength: 8.6MPa, elongation: 1100%, and other excellent properties.

Embodiment 3

[0027] Embodiment 3: 10kg of the prepolymer produced in embodiment 2, add treated bentonite 4kg and acetylene carbon black 5kg and mix uniformly, its tensile strength is 6.1MPa, and elongation is 870%.

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Abstract

In the present invention, prepolymer is prepared by reacting on polyisocyanic acid ester with polyalcohol and the prepared product is a wet-solidification type of polyurethane coating material. The multifunction waterproof and environmental protective coating material can be prepared by adding inert pigment and fire-resisting substancein the prepolymer. The -NCO contained in prepolymer is reacted with water for cross-linking and solidifying to form film having excellent tenside strength and high adhesive force.

Description

1. Technical field: [0001] The invention provides a high-molecular polymer used as a waterproof coating and a production method thereof. 2. Background technology: [0002] For a long time, roof waterproofing mainly adopts the hot asphalt construction method based on asphalt coils. The technology is backward, the pollution is serious, and the performance is poor, the service life is short, and the leakage of the building is quite common. 3. Contents of the invention: [0003] 1. Purpose of the invention: The present invention provides an environment-friendly waterproof coating and its preparation method. Its purpose is to solve the existing problems of existing waterproof materials in terms of environmental pollution, weather resistance, aging resistance, elasticity, and insufficient strength. [0004] 2. Technical solution: the present invention is achieved through the following technical solutions: [0005] An environment-friendly waterproof coating, characterized in tha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/04C09D5/16
Inventor 陶宇
Owner FUJIAN NANGUANG LIGHT IND
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