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Silicon-containing boron-containing aqueous polyurethane and preparation method thereof

A technology of water-based polyurethane and boric acid, which is applied in the chemical field, can solve the problems of reducing the mechanical properties of water-based polyurethane materials, and achieve the effects of reducing the generation of flammable emissions, low surface tension, and good flame-retardant and smoke-suppressing properties

Active Publication Date: 2017-11-10
安徽省金越亨通交通装备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Through these data and information, it is not difficult for researchers to know that introducing silicon-containing compounds into water-based polyurethane segments can theoretically improve the hydrophobicity of water-based polyurethane films, but how to reliably introduce silicon-containing compounds is still a technical problem.
In addition, boron is an element with flame-retardant and smoke-suppressing functions. Adding boron-containing compounds directly to water-based polyurethane materials can improve the flame-retardant and smoke-suppressing properties of materials, but it is found that this will reduce the mechanical properties of water-based polyurethane materials. performance
Generally speaking, there is no waterborne polyurethane with good hydrophobicity, flame retardancy and smoke suppression performance reported in the market.

Method used

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  • Silicon-containing boron-containing aqueous polyurethane and preparation method thereof
  • Silicon-containing boron-containing aqueous polyurethane and preparation method thereof
  • Silicon-containing boron-containing aqueous polyurethane and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0019] Embodiment 1: Preparation of silicon-containing boron-containing waterborne polyurethane

[0020] 1) polyethylene adipate diol and TDI that the average molecular weight is 1000 and TDI are taken by weighing the mol ratio of 1:2.2 and join in the dry four-necked round-bottomed flask, under N 2 Warm up to 80°C under protection, react for 2 hours, then add DMPA to react for 1 hour, then add BDO for chain extension reaction for 2 hours, cool down to 60°C, then add 3-aminopropyltriethoxysilane dropwise for 0.5 hours, cool to 40°C to obtain siloxane-terminated polyurethane. During the reaction, add acetone dropwise to adjust the viscosity of the system. The molar ratio of DMPA, BDO, 3-aminopropyltriethoxysilane and TDI is 0.23:0.27:0.08:1 , the mass addition amount of described acetone is 150% of polyethylene adipate diol quality;

[0021] 2) Place the siloxane-terminated polyurethane synthesized in step 1 at a rotational speed of 1500 rpm, first add TEA to emulsify and neut...

Embodiment 2

[0023] Embodiment 2: Preparation of silicon-containing boron-containing waterborne polyurethane

[0024] 1) take by weighing polytetrahydrofuran ether glycol and TDI that average molecular weight is 2000 by the molar ratio of 1:2.6 and join in the dry four-neck round bottom flask, under N 2 Warm up to 90°C under protection, react for 1h, then add DMPA to react for 1.5h, then add BDO for chain extension reaction for 3h, cool down to 70°C, then add N-(2-aminoethyl)-3-aminopropyl dropwise Trimethoxysilane was reacted for 1.5h, and the temperature was lowered to 50°C to obtain siloxane-terminated polyurethane. During the reaction, acetone was added dropwise to adjust the viscosity of the system. The DMPA, BDO, N-(2-aminoethyl)-3-ammonia The molar ratio of propyltrimethoxysilane and TDI is respectively 0.28:0.23:0.21:1, and the mass addition amount of described acetone is 150% of polytetrahydrofuran ether glycol mass;

[0025] 2) Place the siloxane-terminated polyurethane synthesi...

Embodiment 3

[0027] Embodiment 3: Preparation of silicon-containing boron-containing waterborne polyurethane

[0028] 1) take by weighing polyoxypropylene ether glycol and TDI that average molecular weight is 1750 by the mol ratio of 1:3 and join in the dry four-necked round-bottomed flask, in N 2Under protection, raise the temperature to 70°C, react for 3 hours, then add DMPA to react for 2 hours, then add BDO for chain extension reaction for 1 hour, cool down to 65°C, then add diethylenetriaminopropyltrimethoxysilane dropwise to react for 0.5h, cool down to 40°C to obtain siloxane-terminated polyurethane. During the reaction, add acetone dropwise to adjust the viscosity of the system. The molar ratio of DMPA, diethylenetriaminopropyltrimethoxysilane and TDI is 0.34:0.25:0.15:1 , the mass addition of the acetone is 100% of the polyoxypropylene ether glycol quality;

[0029] 2) Place the siloxane-terminated polyurethane synthesized in step 1 at a speed of 2000 rpm, first add TEA to emulsi...

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Abstract

The invention primarily aims to provide waterborne polyurethane containing silicon and boron further aims to provide a preparation method thereof. The preparation method comprises the following steps: 1 weighing macromolecule dibasic alcohol for being mixed with TDI, raising the temperature to be within 70-90 DEG C under the protection of N2, conducting the reaction for 1-3 hours, firstly adding in DMPA for reacting for 1-2 hours, then adding in BDO for reacting for 1-3 hours, lowering the temperature to be within 60-70 DEG C, subsequently, dropwise adding siloxane with the end capped by amino for reacting for 0.5-1.5 hours, lowering the temperature to be within 30-50 DEG C, and obtaining polyurethane with the end capped by the siloxane; 2 conditioning the polyurethane with the end capped by the siloxane at the rotation speed of 1500-2000 rpm, firstly adding in TEA for conducting the emulsification and neutralization for 20-30 minutes, then adding in boric acid for conducting the emulsification continuously for 10-20 minutes, conducting the reduced pressure distillation, and obtaining the waterborne polyurethane which contains the silicon and the boron and is 25-35% in solid content. The waterborne polyurethane obtained through the preparation method has good dewatering, inflaming retarding and smoke suppressing performance, and in the practical application, the mechanical properties of materials can be effectively guaranteed.

Description

technical field [0001] The invention relates to the field of chemical technology, in particular to a silicon-containing and boron-containing waterborne polyurethane and a preparation method thereof. Background technique [0002] At present, water-based polyurethane has been widely used in the processing of coatings, adhesives, and leather products, but the water-based polyurethane commonly used today contains hydrophilic groups, and its film is not hydrophobic. In addition, the film of water-based polyurethane is easy to burn. The flammability is poor, and it is often accompanied by more smoke when burning. These defects undoubtedly limit the practical application of water-based polyurethane. [0003] It is well known that silicon-containing compounds have excellent hydrophobic properties, for example, "Synthesis of Hydroxyethyl-terminated Polydimethylsiloxane Modified Waterborne Polyurethane" in the Chinese journal "Organic Silicon Materials", Volume 26, Issue 1, 2012 One ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/83C08G18/76C08G18/66C08G18/48C08G18/42C08G18/32C08G18/34C08G18/38
CPCC08G18/289C08G18/3206C08G18/348C08G18/4238C08G18/4825C08G18/4854C08G18/6633C08G18/6666C08G18/7614C08G18/838
Inventor 徐文总聂祝婷
Owner 安徽省金越亨通交通装备有限公司