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A kind of organosilicon-fluorine modified one-component polyurethane waterproof coating and preparation method thereof

A polyurethane waterproof and fluorine-modified technology, used in polyurea/polyurethane coatings, coatings, etc.

Active Publication Date: 2022-06-14
JIANGSU SOBUTE NEW MATERIALS +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the one-component polyurethane waterproof coating disclosed in the above-mentioned invention patent has made some progress in the improvement of comprehensive performance, the effect is far from expected, especially the tensile strength and tear strength are only up to 4MPa and 20N / mm respectively, compared with the national standard The mechanical properties of type II polyurethane waterproof coatings (tensile strength ≥ 4MPa, tear strength ≥ 20N / mm) are significantly different

Method used

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  • A kind of organosilicon-fluorine modified one-component polyurethane waterproof coating and preparation method thereof
  • A kind of organosilicon-fluorine modified one-component polyurethane waterproof coating and preparation method thereof
  • A kind of organosilicon-fluorine modified one-component polyurethane waterproof coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Diphenylmethane diisocyanate (MDI) 12 copies Polyether diol (molecular weight 1000, PPG type) 25 copies Polyether triol (molecular weight 3000, PPG type) 7.5 servings Organosilane capping agent (containing amino group) KH-550 4 parts Trifluoroethanol 2 copies Dioctyl phthalate (DOP) 7 copies Xylene 12 copies heavy calcium 29.9 servings carbon black 0.1 part Dibutyltin dilaurate (T-12) 0.2 parts Dispersant 0.3 parts

[0034] Process of modified polyurethane waterproof coating:

[0035] (1) Add 25 parts by weight of hydroxyl-terminated polyether diols and 7.5 parts by weight of trihydric alcohols, 7 parts by weight of dioctyl phthalate (DOP), 29.9 parts by weight of heavy calcium, and 0.1 parts by weight of carbon black in the reaction vessel part, stir and heat up to 100°C, and dehydrate for 2 hours under a vacuum of -0.08~-0.1MPa;

[0036] (2) Lower the temperature to 70°C, add 0.3 part...

Embodiment 2

[0041]

[0042]

[0043] Process of modified polyurethane waterproof coating:

[0044] (1) Add 35 parts by weight of hydroxyl-terminated polyether diols and 5 parts by weight of trihydric alcohols, 5 parts by weight of dioctyl phthalate (DOP), 15.9 parts by weight of heavy calcium and 0.1 parts by weight of carbon black in the reaction vessel part, stir and heat up to 120°C, and dehydrate under a vacuum of -0.1MPa for 3 hours;

[0045] (2) Lower the temperature to 80°C, add 0.3 parts by weight of dispersant and 14 parts by weight of toluene diisocyanate (TDI), and react for 3 hours under stirring at 85°C;

[0046] (3) Lower the temperature to 60°C, add 5 parts by weight of organosilane end-capping agent (containing amino groups) Nanda-42, raise the temperature to 80°C under stirring, react for 3 hours, then add trifluoropropanol while maintaining the temperature 4 parts by weight, continue to stir for 60min;

[0047] (4) Lower the temperature to 60°C, add 0.2 parts by we...

Embodiment 3

[0050]

[0051]

[0052] Process of modified polyurethane waterproof coating:

[0053] (1) Add 35 parts by weight of hydroxyl-terminated polyether diol and 5.5 parts by weight of trihydric alcohol, 5 parts by weight of diisononyl phthalate (DLNP), 14.9 parts by weight of talcum powder and 0.1 parts by weight of carbon black in the reaction vessel parts by weight, stirred and heated to 120°C, and dehydrated for 3 hours under a vacuum of -0.1MPa;

[0054] (2) Lower the temperature to 80°C, add 0.2 parts by weight of dispersant and 18 parts by weight of isophorone diisocyanate (IPDI), and react for 3 hours under stirring at 85°C;

[0055] (3) Lower the temperature to 60°C, add 5 parts by weight of organosilane capping agent (containing amino groups) KH-602, raise the temperature to 80°C under stirring, react for 3 hours, then add pentafluorobutanol while maintaining the temperature 6 parts by weight, continue to stir for 60min;

[0056] (4) Lower the temperature to 60°C, ...

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Abstract

The invention discloses a silicone-fluorine modified one-component polyurethane waterproof coating and a preparation method thereof. The polyurethane waterproof coating of the present invention comprises the following components: isocyanate, hydroxyl-terminated polyether diol, hydroxyl-terminated polyether triol, organosilane capping agent, fluorocarbon alcohol, plasticizer, solvent, pigment and filler, catalyst and dispersants. The organosilicon-fluorine modified one-component polyurethane waterproof coating described in the present invention adopts specific organosilicon and organic fluorine modified materials to modify the polyurethane coating to achieve the purpose of strengthening and toughening; and effectively solves the problem of organosilicon-fluorine The problem of incompatibility with traditional polyurethane resins. The polyurethane resin contains organosilane and fluorocarbon branched chains, which can make the polyurethane resin react with the hydroxyl groups on the surface of building substrates, so that it has good adhesion. At the same time, the fluorocarbon branched chains The polyurethane resin can be made to have the effect of hydrophobic and oleophobic, and the weather resistance is greatly improved.

Description

technical field [0001] The invention belongs to the field of building waterproofing, and in particular relates to a silicone-fluorine modified one-component polyurethane waterproof coating and a preparation method thereof. Background technique [0002] Polyurethane waterproof coatings are prepolymers containing isocyanate groups formed by addition polymerization of isocyanate and polyether, together with catalysts, anhydrous additives, anhydrous fillers, etc., and processed through mixing and other processes. Since the early 1980s in my country, it has been popularized and applied. It is the most successful coating waterproof material used so far, and it occupies an important position in the application of building waterproofing. Polyurethane waterproof coatings are widely used in projects such as tunnels, subways, high-speed rails, roofs, and kitchens and bathrooms, and have good waterproof effects. According to its composition and curing mechanism, polyurethane waterproof...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/08C09D7/61C09D7/63C09D7/65C08G18/66C08G18/48C08G18/10C08G18/28
CPCC09D175/08C09D7/61C09D7/63C09D7/65C08G18/4812C08G18/10C08G18/2885C08G18/289C08K2003/265C08K5/12C08K3/26C08K3/04C08G18/2805C08K3/34C08L91/06
Inventor 亓帅张小冬孙德文沈志明卢立群冉千平刘加平刘畅李波朱剑南王中华
Owner JIANGSU SOBUTE NEW MATERIALS
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