One-component self-curing polyurethane waterproof coating

A polyurethane waterproof and waterproof coating technology, applied in polyurea/polyurethane coatings, coatings, etc., can solve problems such as troublesome construction of two-component coatings, threats to environmental protection, and impact on waterproof effects, and achieve acid and alkali chemical corrosion resistance, Excellent wear resistance, good waterproof effect

Inactive Publication Date: 2012-06-20
湖北蓝盾之星科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the existing solvent-free one-component asphalt-based polyurethane waterproof coating avoids the problem of troublesome construction of two-component coatings, it still poses a threat to environmental protection because it is based on asphalt.
In addition, the existing one-component waterproof coating is cured by moisture absorption, and bubbles are easily generated inside the thick coating, which affects the waterproof effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Polyol (castor oil) 30%, diphenylmethane-4,4'-diisocyanate (MDI) 10%, plasticizer (petroleum resin) 30%, filler (carbon black: talcum powder mass ratio is 1:1 ) 25%, water remover (TI) 2%, silane coupling agent (KH560) 0.5%, UV inhibitor (UV531) 0.5%, initiator (stannous octoate) 0.5%, defoamer (P-420: The mass ratio of AC-301 is 1:1) 1.5%; enhancer (glycerin) 5%.

[0033] The waterproof coating is produced according to the above production process. The performance of the coating product is 20.47Mpa in tensile strength, 180% in elongation at break, and 6.21Mpa in bonding strength with the substrate (concrete). Change, low temperature -40 ℃ without cracks, impermeable to 0.5Mpa 30 minutes impermeable.

Embodiment 2

[0035] Polyol (castor oil) 35%, diphenylmethane-4,4'-diisocyanate (MDI) 10%, plasticizer (petroleum resin) 25%, filler (carbon black: talcum powder mass ratio is 1:1 ) 25%, water remover (TI) 2%, silane coupling agent (KH560) 0.5%, UV inhibitor (UV531) 0.5%, initiator (stannous octoate) 0.5%, defoamer (P-420: The mass ratio of AC-301 is 1:1) 1.5%; enhancer (glycerin) 5%.

[0036] The waterproof coating is produced according to the above production process. The performance of the coating product is 17.46Mpa in tensile strength, 186% in elongation at break, and 7.11Mpa in bonding strength with the substrate (concrete). Change, low temperature -40 ℃ without cracks, impermeable to 0.5Mpa 30 minutes impermeable.

Embodiment 3

[0038] Polyol (castor oil) 40%, diphenylmethane-4,4'-diisocyanate (MDI) 15%, plasticizer (petroleum resin) 20%, filler (carbon black: talcum powder mass ratio 1:1 ) 20%, water remover (TI) 2%, silane coupling agent (KH560) 0.5%, UV inhibitor (UV531) 0.5%, initiator (stannous octoate) 0.5%, defoamer (P-420: The mass ratio of AC-301 is 1:1) 1.5%; enhancer (glycerin) 5%.

[0039] The waterproof coating is produced according to the above production process. The performance of the coating product is 21.03Mpa in tensile strength, 185% in elongation at break, and 5.81Mpa in bonding strength with the substrate (concrete). Change, low temperature -40 ℃ without cracks, impermeable to 0.5Mpa 30 minutes impermeable.

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Abstract

One-component self-curing polyurethane waterproof coating is characterized by being formed by preparing the following components by mass percent: 20% to 40 % of polyhydroxy compounds, 10% to 35% of polyisocyanate, 0.1% to 1% of initiating agents, 10% to 30 % of plasticizers, 15% to 30 % of fillers, 0.1% to 1% of anti-ultraviolet agents, 0.2% to 4% of water removal agents, 0.05% to 1% of silane coupling agents and 1% to 3% of antifoaming agents. The one-component self-curing polyurethane waterproof coating has the advantages that a self-curing purpose is achieved through water absorption of isocyanate in polyurethane prepolymer, no curing agent needs to be added additionally, a coating obtained after construction is very thin, and the coating and a substrate have good adhesion, excellent abrasion resistance and corrosion resistance to acid, alkali and other chemicals. No air bubble exists in the coating, and the coating shows good waterproof effect. The one-component self-curing polyurethane waterproof coating overcomes shortcomings of the existing technology, tensile strength of the coating reaches 3 to 22 MPa, breaking elongation of the coating is larger than 150%, and the one-component self-curing polyurethane waterproof coating is suitable for various different environments and can be used for construction directly.

Description

technical field [0001] The invention relates to the technical field of waterproofing of chemical coatings, and is a high-performance single-component self-curing polyurethane waterproof coating which is different from two-component polyurethane waterproof coatings. Background technique [0002] Polyurethane waterproof coating is a polymer waterproof material developed in Europe, America, Japan and other countries in the 1960s. It can be divided into two-component polyurethane waterproof coating and one-component polyurethane waterproof coating. Its development has gone through stages such as the tar stage and the asphalt stage, and is currently developing towards an environment-friendly stage. [0003] During the construction of two-component polyurethane coatings, the ingredients are required to be weighed, and a certain amount of volatile solvents are mixed into the ingredients, and then vigorously stirred. The volatilization of the added volatile solvent is very unfavora...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/14C09D7/12C08G18/67
Inventor 谭晓明徐闫鲁小龙张盛胡远强
Owner 湖北蓝盾之星科技有限公司
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