Flame-retarding ultraviolet curing aqueous polyurethane coating and preparation method thereof

A technology of polyurethane and polyurethane prepolymer, applied in the direction of polyurea/polyurethane coatings, coatings, etc., achieves the effects of environmental friendliness, simple and convenient process, and wide application prospects

Active Publication Date: 2011-11-23
XINFENG JIANWEI CHEM INDAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these flame retardant technologies have never been used in UV light-curable waterborne PU coatings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Add 28 g of glutaric acid, 55 g of pentanediol, and 17 g of 1, 2, 4-tricarboxylic acid-2-phosphonobutane into a three-necked flask at 220 o C was stirred under nitrogen gas for 12 hours to obtain phosphorus-containing polyester polyol.

[0037] (2) Add 30 g of toluene diisocyanate and 4 drops of dibutyltin dilaurate catalyst into a 1L four-necked bottle, add 100 g of phosphorus-containing polyester polyol in butanone solution, and control the temperature at 75-80 o C, reacted for 3 hours, measured the content of NCO with the di-n-butylamine method to obtain a phosphorus-containing polyurethane prepolymer (containing 5.6% free NCO groups) terminated with isocyanate. In addition, in order to monitor the progress of the reaction, it is also possible to use a rotational viscometer (ISO 3219: 1993) and #1 spindle at room temperature to sample and analyze the dynamic viscosity Vd.

[0038] (3) Add 30 g of dimethylolpropionic acid to the reaction product in step (2), at ...

Embodiment 2

[0044] Same as embodiment 1 reaction process. Wherein, glutaric acid is replaced by adipic acid, pentylene glycol is replaced by neopentyl glycol, and other ratios are all unchanged. After the reaction, add triethylamine to the system to neutralize, dilute with water to a solid content of 40%, soak the UV-cured film in distilled water for 24 hours, and the water absorption rate is 8%, according to the national standard GB / T 6739-1996 "coating film Hardness pencil test method, the pencil hardness of the coating film reaches 1H, according to the national standard "GB1720-(79) 88 paint film adhesion test method", the adhesion can reach level 1. According to the national standard GB12441-1998 "General Technical Conditions for Facing Fireproof Coatings", the value of the cured film is determined. Its flame-resistant time is ≥ 19 minutes, and the fire-ignition transmission ratio is ≤ 30. It has reached the second-level domestic enterprise production fireproof performance.

Embodiment 3

[0046] Same as embodiment 1 reaction process. Wherein, the dibutyltin dilaurate catalyst is changed to stannous zincate, and the molar ratio of phosphorus-containing polyester polyols to hydroxyl groups in dimethylol propionic acid is 3:1 to 2:1, and hydroxyethyl methacrylate Or hydroxypropyl acrylate, the other ratios are unchanged. After the reaction, add triethylamine to the system for neutralization, adjust the pH to 9, dilute with water to a solid content of 40%, soak the UV-cured film in distilled water for 24 hours, and the water absorption rate is 11%, according to the national standard GB / T 6739 -1996 "Pencil Test Method for Coating Film Hardness", the pencil hardness of the coating film reaches 1H, according to the national standard "GB1720-(79) 88 Paint Film Adhesion Test Method", the adhesion can reach level 1. According to the national standard GB12441-1998 "General Technical Conditions for Facing Fireproof Coatings", the value of the cured film is determined. It...

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Abstract

The invention discloses a method for preparing flame-retarding ultraviolet curing aqueous polyurethane coating and belongs to the technical field of ultraviolet curing aqueous polyurethane coating. The preparation method comprises: synthesizing phosphorized polyester polyol by using dicarboxylic acid, diol and phosphonate polycarboxylic acid; mixing the obtained phosphorized polyester polyol, diisocyanate and a catalyst, reacting to obtain isocyanate-terminated phosphorized polyurethane prepolymer, directly adding polyhydroxyl carboxylic acid, and performing chain extension reaction to obtainphosphorized polyurethane prepolymer; and terminating the phosphorized polyurethane prepolymer by using hydroxyethyl methacrylate or hydroxypropyl acrylate, neutralizing by using an amine compound, diluting with water, stirring, emulsifying and adding photoinitiator to obtain the flame-retarding ultraviolet curing aqueous polyurethane coating. When the method is used, the aqueous polyurethane dispersion has internal flame-retarding performance and radiation curing performance and the application range of the aqueous polyurethane is expanded greatly.

Description

technical field [0001] The invention relates to a novel flame-retardant ultraviolet-curable water-based polyurethane coating and a preparation method thereof, belonging to the technical field of ultraviolet-curable coatings. Background technique [0002] In recent years, ultraviolet (UV) curable water-based coatings have attracted increasing attention because of their good comprehensive performance, high efficiency, and environmental protection. Among them, UV water-based polyurethane (PU) coating has become a new type of coating with great development and application prospects because it combines many advantages of traditional UV curing technology and water-based PU coating technology. Since PU coatings are widely used in the protection and decoration of substrate surfaces such as wood, plastic and building materials, if these substrates are not treated with flame retardant, they may become potential fire hazards. Therefore, the development of flame retardant technology It...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/67C08G18/66C08G18/46C08G18/10C08G63/692C09D175/16
Inventor 杨小毛
Owner XINFENG JIANWEI CHEM INDAL
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