Organic silicon-fluorine modified single-component polyurethane waterproof coating and preparation method thereof

A polyurethane waterproof and fluorine modified technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of gaps, the effect is not as expected, and the tensile strength and tear strength are only 4MPa and 20N/mm.

Active Publication Date: 2021-09-28
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

Method used

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  • Organic silicon-fluorine modified single-component polyurethane waterproof coating and preparation method thereof
  • Organic silicon-fluorine modified single-component polyurethane waterproof coating and preparation method thereof
  • Organic silicon-fluorine modified single-component polyurethane waterproof coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Raw material ratio of modified polyurethane waterproof coating:

[0034] 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

[0035] Process of modified polyurethane waterproof coating:

[0036] (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 o...

Embodiment 2

[0041] Raw material ratio of modified polyurethane waterproof coating:

[0042]

[0043]

[0044] Process of modified polyurethane waterproof coating:

[0045] (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;

[0046] (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;

[0047] (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 f...

Embodiment 3

[0050] Raw material ratio of modified polyurethane waterproof coating:

[0051]

[0052]

[0053] Process of modified polyurethane waterproof coating:

[0054] (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;

[0055] (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;

[0056] (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,...

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Abstract

The invention discloses an organic silicon-fluorine modified single-component polyurethane waterproof coating and a preparation method thereof. The polyurethane waterproof coating comprises the following components: isocyanate, hydroxyl-terminated polyether glycol, hydroxyl-terminated polyether triol, an organosilane end-capping reagent, fluorocarbon alcohol, a plasticizer, a solvent, a pigment filler, a catalyst and a dispersing agent. According to the organic silicon-fluorine modified single-component polyurethane waterproof coating, the polyurethane coating is modified by adopting specific organic silicon and organic fluorine modified materials so that the aims of strengthening and toughening are fulfilled; the problem that organic silicon-fluorine is incompatible with traditional polyurethane resin is effectively solved, the polyurethane resin contains organosilane and fluorocarbon branched chains, and the polyurethane resin can react with hydroxyl on the surface of the building base material, so that very good adhesive force is realized, meanwhile, the fluorocarbon branched chain can enable the polyurethane resin to have hydrophobic and oleophobic effects, 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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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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