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Preparation method of graphene modified flame retardant waterborne polyurethane coating

A water-based polyurethane and graphene modification technology, used in polyurea/polyurethane coatings, polyurea/polyurethane adhesives, conductive coatings, etc. The effect of improving electrical conductivity and improving carbonization

Active Publication Date: 2021-07-09
中炬高新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The polyurethane anti-static anti-corrosion coating provided by it has a certain elongation and can avoid the influence of water vapor. It can be applied in an environment above 0°C and below a relative humidity of 95%. The static conductive performance is long-lasting, but its conductive resistance is too large , at 10 9 The above needs to be further improved
[0008] The Chinese patent application with the application number 201510216196.2 discloses a method for preparing a flame-retardant water-based polyurethane coating and an adhesive. In a 500ml four-necked flask equipped with a stirring blade, a thermometer, and a condenser tube, polytetrahydrofuran ether glycol Mix it with isocyanate, and react at 85°C for 2.5h in the presence of 0.26g of dibutyltin dilaurate as a catalyst to obtain polyurethane prepolymer A; Flame D, react at 85°C for 2.5h, add triethylamine for neutralization reaction for 60min, add water for emulsification for 1h, and add flame retardant E, reaction temperature 75°C, reaction time 1h, adjust system pH to 7~ 8. The flame-retardant water-based polyurethane coating and adhesive formed, the polyurethane material has high flame-retardant performance, environmental protection, and low price, which can meet the low-cost demand of the market, but its smoke volume is still relatively large

Method used

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  • Preparation method of graphene modified flame retardant waterborne polyurethane coating
  • Preparation method of graphene modified flame retardant waterborne polyurethane coating
  • Preparation method of graphene modified flame retardant waterborne polyurethane coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Preparation of MOFs: Add 12g of ammonium molybdate, 0.6g of nano-silver, and 1.6g of 1,5-naphthalene disulfonic acid to 20g of terephthalic acid and 60g of deionized water, and stir at 50°C for 30min. Transfer the obtained liquid to an autoclave, stir and react at 180°C for 2h, filter, wash once with 80ml of water to obtain a powder, and dry in an oven at 80°C for 24h;

[0036] (2) Preparation of flame retardant MOFs composite: Add 60g of dimethyl phosphite into the reaction vessel, then add 1.2g of sodium methoxide and heat up to 75°C, after all the sodium methoxide is dissolved, add 65g of acrylamide and triene Propyl isocyanurate 0.1g, allyl triisopropyl silane 0.4g, propylene hydroxamic acid 0.1g, diethyl malonate 0.2g, lower the temperature to 50°C, keep stirring for 2 hours to obtain the intermediate ; Add 3.2g of MOFs and 0.05g of hydroxylated graphene to the intermediate, react at 60°C for 0.5h, then add 2,5-dihydroxy-3,6-dinitro-1, 0.1g of 4-benzoquinone, ...

Embodiment 2

[0043] (1) Preparation of MOFs: Add 14 g of ammonium molybdate, 0.7 g of nano-silver, and 3.4 g of 1,5-naphthalene disulfonic acid to 20 g of terephthalic acid and 60 g of deionized water, and stir at 60°C for 60 min. The obtained liquid was transferred to an autoclave, stirred and reacted at 200°C for 3h, filtered, washed with 80ml of water once to obtain a powder, and dried in an oven at 80°C for 24h;

[0044] (2) Preparation of flame retardant MOFs composite: Add 60 g of dimethyl phosphite into the reaction vessel, then add 1.8 g of sodium methoxide and raise the temperature to 95°C. After all the sodium methoxide is dissolved, add 85 g of acrylamide and triene 0.7g of propyl isocyanurate, 0.7g of allyltriisopropylsilane, 0.6g of propylene hydroxamic acid, 0.3g of diethyl malonate, lower the temperature to 70°C, keep stirring for 5h to obtain the intermediate ; Add 4.6g of MOFs obtained in step (1) and 0.1g of hydroxylated graphene to the intermediate, react at 90°C for 1.5...

Embodiment 3

[0051] (1) Preparation of MOFs: Add 13g of ammonium molybdate, 0.65g of nano-silver, and 2.5g of 1,5-naphthalene disulfonic acid to 20g of terephthalic acid and 60g of deionized water, and stir at 55°C for 45min. The obtained liquid was transferred to an autoclave, treated at 190°C for 2.5h, filtered, washed once with 80ml of water to obtain a powder, and dried in an oven at 80°C for 24h;

[0052] (2) Preparation of flame retardant MOFs composite: Add 60g of dimethyl phosphite into the reaction vessel, then add 1.5g of sodium methoxide and heat up to 85°C, after all the sodium methoxide is dissolved, add 75g of acrylamide and triene 0.55g of propyl isocyanurate, 0.55g of allyltriisopropylsilane, 0.35g of propylene hydroxamic acid, 0.25g of diethyl malonate, lower the temperature to 60°C, keep stirring for 3.5h to obtain intermediate body; add 3.9g of MOFs obtained in step (1) and 0.075g of hydroxylated graphene to the intermediate, react at 75°C for 1h, then add 2,5-dihydroxy-...

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Abstract

The invention relates to a method for preparing graphene-modified flame-retardant water-based polyurethane coatings and adhesives. First, MOFs are used to prepare flame-retardant MOFs composites, and then flame-retardant MOFs composites are used to prepare flame-retardant MOFs dispersions. Finally, polymers are used Polyurethane coatings and adhesives prepared from polyols, isocyanates, dibutyltin dilaurate and flame-retardant MOFs dispersions. It has outstanding effects in improving two important indicators of polyurethane coatings and adhesives, flame retardancy and antistatic.

Description

technical field [0001] The invention relates to the field of functional polymer materials, in particular to a preparation method of graphene-modified flame-retardant waterborne polyurethane coating. Background technique [0002] Since the 1950s, my country began to develop and apply polyurethane coatings. With the continuous improvement and improvement of the material living standards of the general public, the development speed of a series of industries such as automobile processing, furniture manufacturing and processing, petrochemical industry, machinery industry, bridge and shipbuilding has been continuously increasing. With its outstanding performance advantages, polyurethane coatings have entered a new stage of rapid development. According to statistics, from 1980 to 2004, the use of polyurethane coatings in various industries has shown a very rapid development trend. The total use of polyurethane coatings has achieved a breakthrough development from 0.17 million to 2...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/08C09D175/04C09D5/18C09D5/24C09J175/08C09J175/04C09J11/08C09J11/04C08G83/00C08G18/66C08G18/48C08G18/44C08G18/34
CPCC09D175/04C09D5/18C09J175/04C09J11/08C08G83/008C08L2201/02C08L87/00
Inventor 段宝荣王全杰王辉强刁屾王琦研王雪李兴存唐志海
Owner 中炬高新材料股份有限公司
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