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Method for preparing flame retardant aqueous polyurethane coating and adhesive

A water-based polyurethane, flame-retardant technology, applied in the direction of fire-resistant coatings, etc., can solve the environmental hazards of heavy metal tin and other problems

Inactive Publication Date: 2015-08-26
段宝荣
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Dibutyltin dilaurate is often used as a catalyst in the synthesis of polyurethane, but since the heavy metal tin is harmful to the environment with the degradation of polyurethane, efficient and non-toxic catalysts are screened is a major problem in the synthesis of polyurethane

Method used

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Examples

Experimental program
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specific Embodiment approach

[0032] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be further described below in conjunction with examples

example 1

[0034] (1) Stir 25g of phosphorus pentoxide, 16g of sodium ethylenediamine tetramethylene phosphonate and 12g of 1-butyl-3-methylimidazolium tetrafluoroborate at room temperature for 30 minutes to obtain the dispersion of phosphorus pentoxide solution; add 37.5g of tetrakis hydroxymethylphosphorus sulfate and 29.5g of phosphorus pentoxide dispersion into the reaction system, stir and heat up to 70°C, keep stirring and react for 2 hours, and make it fully react to obtain product A; Add 40.8g of pentaerythritol and 1.2g of 3-methoxy-4-hydroxymandelic acid, the temperature of the reaction system is 75°C, stir and react for 2h to obtain product B; add 29.5g of maleic anhydride, hexachloro Cyclotriphosphazene 12g, tea saponin 12g and aluminum triethylphosphate 4.3g, stirred for 2 hours, the temperature of the reaction system was 80°C, added 2g of pentasodium diethylenetriaminepentaacetate, and reacted for 1h at 70°C to obtain a transparent liquid C , which is the intumescent flame ...

example 2

[0038] (1) Stir 25g of phosphorus pentoxide, 16g of sodium ethylenediamine tetramethylene phosphonate and 13g of 1-butyl-3-methylimidazolium tetrafluoroborate at room temperature for 30 minutes to obtain the dispersion of phosphorus pentoxide solution; add 37.5g of tetrakis hydroxymethylphosphorus sulfate and 29.5g of phosphorus pentoxide dispersion into the reaction system, and keep stirring at 70°C for 2h to make it fully react to obtain product A; add 40.8 g of pentaerythritol to the product A system g and riboflavin 3.2g, stirred and reacted at 75°C for 2h to obtain product B; add maleic anhydride 29.5g, hexachlorocyclotriphosphazene 12g, tea saponin 12g and aluminum triethylphosphate 5.3g to the product B system , stirred and reacted at 80°C for 2h, added 2g of pentasodium diethylenetriaminepentaacetate, and reacted at 70°C for 1h to obtain a transparent liquid C, which is intumescent flame retardant D.

[0039] (2) In a 500ml four-necked flask equipped with a stirring bl...

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Abstract

The invention discloses a method for preparing flame retardant aqueous polyurethane coating and adhesive. Polytetrahydrofuran ether glycol and isocyanate are mixed in a 500ml four-opening flask where a stirrer, a thermometer and a condenser pipe are arranged, reaction is performed for 2.5 hours at the temperature of 75 DEG C under the condition of existing of catalyzer dibutyl tin dilaurate to obtain a polyurethane prepolymer A, pyridoxal phosphate and inrumescent flame retardants are added into the polyurethane prepolymer A, reaction is performed for 2.5 hours at the temperature of 85 DEG C, triethylamine is added for neutralization reaction for 90 minutes, water is added for emulsification, ethylenediamine tetramethylenephosphonic acid, dipotassium ethylene diamine tetraacetate and bis(4-carboxyphenyl)phenyl-phosphine oxide are added, reaction temperature is 85 DEG C, the reaction time is one hour, and a system potential of hydrogen (pH) is adjusted to 7-8 to form the flame retardant aqueous polyurethane coating and adhesive. The polyurethane material is high in flame retardant property, environmental friendly, low in price and capable of meeting low cost requirements of market.

Description

technical field [0001] The preparation method of polyurethane involved in the present invention particularly relates to the preparation method of flame-retardant waterborne polyurethane coating and adhesive. Background technique [0002] Waterborne polyurethane is a polyurethane resin containing hydrophilic groups in the molecular chain of polyurethane, which has a strong affinity with water. It can be dispersed in water and form a stable system by using a specific process. Water-based polyurethane is mainly used in leather finishing, textile printing and dyeing, papermaking, architectural coatings, adhesives, etc. Almost all of the materials involved are flammable materials. If these materials are not treated with flame retardant, they will inevitably become a fire hazard. . The flame retardancy of waterborne polyurethane is one of the important directions of functionalization of waterborne polyurethane. [0003] Dibutyltin dilaurate is often used as a catalyst in the syn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/08C09D5/18C09J175/08C08G18/76C08G18/75C08G18/10C08G18/66C08G18/48C08G18/38C08G18/32
Inventor 段宝荣
Owner 段宝荣
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