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Modified polyurethane water-proof anticorrosive surface treating agent and preparation method as well as application thereof

A polyurethane waterproof and surface treatment agent technology, applied in polyurea/polyurethane coatings, anti-corrosion coatings, anti-fouling/underwater coatings, etc., can solve the problems of difficulty in achieving durability, heavy-duty anti-corrosion, and single performance, and achieve good surface energy , Improve crosslinking strength and durability, simple synthesis process

Active Publication Date: 2012-07-18
HEILONGJIANG TAINA TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the reported patents, a single material is generally used as the base material of the anti-corrosion coating, such as epoxy-modified polyurethane material, silicone resin or fluorocarbon resin, etc. The properties of these materials are relatively single, and it is difficult to achieve durability and weight. Anti-corrosion requirements

Method used

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  • Modified polyurethane water-proof anticorrosive surface treating agent and preparation method as well as application thereof
  • Modified polyurethane water-proof anticorrosive surface treating agent and preparation method as well as application thereof
  • Modified polyurethane water-proof anticorrosive surface treating agent and preparation method as well as application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] In a stainless steel reaction kettle equipped with a stirring blade, a condenser tube, a thermometer and a nitrogen purge tube, add 111 grams (0.5 mol) of isophorone diisocyanate (IPDI) with a weight average molecular weight of 2000 dihydroxyl-terminated polysiloxane 200 grams (0.1mol) of alkane, 0.2 grams of dibutyltin dilaurate, dry N 2 Under protection, react at 90°C for 1 hour, lower the temperature to 50°C, add 400 g of solvent butyl acetate, 22 g (0.24 mol) of butanediol, and perform chain extension reaction for 1 hour under stirring, then raise the temperature of the reactor to 70°C, add Perfluorohexyl ethanol (C 6 f 13 CH 2 CH 2 OH) 65 grams (0.18mol), aminopropyl triethoxysilane 6.6 grams (0.03 mol), carry out end-capping reaction 2 hours at this temperature, make fluorine / silicon modified polyurethane waterproof and anticorrosion surface treatment agent 693.8 grams , The solid content is 42.3%.

Embodiment 2

[0049] In a stainless steel reaction kettle equipped with a stirring blade, a condenser tube, a thermometer and a nitrogen purge tube, 80 grams (0.45mol) of toluene diisocyanate (TDI) and 150 grams of dihydroxy-terminated polysiloxane with a weight average molecular weight of 1000 were added (0.15mol), 0.15 grams of dibutyltin dilaurate, dry N 2 React at 80°C for 1 hour under protection, cool down to 50°C, add 400 g of solvent butyl acetate, 12 g (0.13 mol) of butanediol, and perform chain extension reaction for 1 hour under stirring, then raise the temperature of the reactor to 70°C, add N methyl perfluorohexyl sulfonamide ethanol (C 6 f 13 SO 2 N(CH 3 )CH 2 CH 2 OH) 100 grams (0.22mol), aminopropyltriethoxysilane 6.6 grams (0.03mol), carry out end-capping reaction 2 hours at this temperature, make fluorine / silicon modified polyurethane waterproof anticorrosion surface treatment agent 748.8 grams , The solid content is 46.5%.

Embodiment 3

[0051] In the stainless steel reaction kettle that stirrer blade, condensing pipe, thermometer and nitrogen purge pipe are housed, add isophorone diisocyanate (IPDI) 80 grams (0.36mol), triphenylmethane triisocyanate 50g (0.14mol), The weight-average molecular weight is 3000, 500 grams (0.17mol) of dihydroxyl-terminated polysiloxane, 0.3 grams of zinc octoate, dry N 2 Under protection, react at 90°C for 1 hour, lower the temperature to 60°C, add 500 grams of solvent methyl ethyl ketone, 25 g (0.28 mol) of butanediol, and perform chain extension reaction for 1 hour under stirring, then raise the temperature of the reactor to 70°C, add perfluorinated Butyl ethanol (C 4 f 9 CH 2 CH 2 OH) 50 grams (0.19mol), 9 grams (0.04mol) of aminopropyltriethoxysilane, carry out capping reaction 1.5 hours at this temperature, make 1214.3 grams of fluorine / silicon modified polyurethane waterproof anticorrosion surface treatment agent , The solid content is 58.8%.

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Abstract

The invention discloses a modified polyurethane water-proof anticorrosive surface treating agent and a preparation method as well as application thereof, and belongs to the field of organic macromolecular composite materials. The treating agent has a structural formula of [(RO)3Si-CH2CH2CH2]a-PU-[X-Rf]b, wherein PU is polysiloxane type polyurethane; Rf is a perfluoroalkyl chain segment with 4-6 carbon atoms; X is a bivalent organic linking group; R is methyl or ethyl group; a is equal to 0-6; and b is equal to 1-6. The preparation method comprises the following steps of: reacting polyisocyanate with double-carbon hydroxyl end blocked polysiloxane in an organic solvent to generate NCO-end blocked prepolymer under the action of a polymerization catalyst; and performing chain extension and then performing end blocking reaction with perfluoroalkyl alcohol with fluorocarbon chain length of 4-6 and silane coupling agent to obtain the surface treating agent. The treating agent is used for water-proof anticorrosive treatment of various underwater buildings, oversea bridges, submarine bearing platforms and various ships and warships, and has superior permeability, weather resistance and stable water-proof anticorrosive performance.

Description

technical field [0001] The invention relates to the field of organic polymer composite materials, in particular to a modified polyurethane waterproof and anti-corrosion surface treatment agent and a preparation method thereof. Background technique [0002] As a building material, concrete is widely used in the field of modern architecture because of its superior performance and economy. my country is currently constructing large-scale offshore infrastructure, such as port terminals, offshore wind power, and sea-crossing bridges. Concrete is a porous material, and this porosity makes it easy for external corrosion factors to invade the interior of the concrete, causing damage to the concrete structure. Because seawater or nearby air contains a large amount of chloride ions, these chloride ions will penetrate into the concrete structure and corrode the steel bars, causing the concrete to collapse, causing serious consequences. The carbonization of concrete is also a kind of c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D5/08C09D5/16C08G18/61C08G18/38C04B41/48
Inventor 孔德庆
Owner HEILONGJIANG TAINA TECH DEV
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