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Waterborne polyurethane containing silicon and boron 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, achieve the effects of reducing the generation of flammable emissions, ensuring mechanical properties, and improving flame retardancy

Active Publication Date: 2015-10-21
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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  • Waterborne polyurethane containing silicon and boron and preparation method thereof
  • Waterborne polyurethane containing silicon and boron and preparation method thereof
  • Waterborne polyurethane containing silicon and boron and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0020] 1) Weigh polyethylene adipate diol with an average molecular weight of 1000 and TDI in a molar ratio of 1:2.2 and add them to a dry four-neck round bottom flask. 2 Under protection, the temperature was raised to 80°C and reacted for 2h, then DMPA was added to react for 1h, then BDO was added for chain extension reaction for 2h, and the temperature was reduced to 60°C. Then 3-aminopropyltriethoxysilane was added dropwise to react for 0.5h, and the temperature was reduced to At 40°C, a siloxane-terminated polyurethane was obtained. Acetone was added dropwise to adjust the viscosity of the system during the reaction. The molar ratio of DMPA, BDO, 3-aminopropyltriethoxysilane and TDI was 0.23:0.27:0.08:1 , The added mass of acetone is 150% of the mass of polyethylene adipate glycol;

[0021] 2) Put the siloxane-terminated polyurethane synthesized in step 1 under the condition of 1500rp...

Embodiment 2

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

[0024] 1) Weigh polytetrahydrofuran ether glycol with an average molecular weight of 2000 and TDI in a molar ratio of 1:2.6 and add them to a dry four-neck round bottom flask. 2 Under protection, the temperature was raised to 90℃, reacted for 1h, then DMPA was added to react for 1.5h, then BDO was added for chain extension reaction for 3h, the temperature was reduced to 70℃, and then N-(2-aminoethyl)-3-aminopropyl was added dropwise. The trimethoxysilane was reacted for 1.5h, and the temperature was lowered to 50°C to obtain a siloxane-terminated polyurethane. During the reaction, acetone was added to adjust the viscosity of the system. The DMPA, BDO, and N-(2-aminoethyl)-3-ammonia The molar ratios of propyltrimethoxysilane and TDI are 0.28:0.23:0.21:1 respectively, and the mass addition amount of acetone is 150% of the mass of the polytetrahydrofuran ether glycol;

[0025] 2) Put the sil...

Embodiment 3

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

[0028] 1) Weigh the polyoxypropylene ether glycol with an average molecular weight of 1750 and TDI in a molar ratio of 1:3 and add them to a dry four-necked round bottom flask. 2 Under protection, the temperature was raised to 70°C and reacted for 3h, then DMPA was added to react for 2h, then BDO was added for chain extension reaction for 1h, and the temperature was lowered to 65°C, then diethylenetriaminopropyltrimethoxysilane was added dropwise to react for 0.5h, and the temperature was lowered. At 40°C, a siloxane-terminated polyurethane is obtained. During the reaction, acetone is added 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 amount of acetone is 100% of the mass of the polyoxypropylene ether glycol;

[0029] 2) Put the siloxane-terminated polyurethane synthesized ...

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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 technical field of chemistry, in particular to a silicon-containing 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, leather and other products. However, the water-based polyurethane commonly used today contains hydrophilic groups, and its film is not hydrophobic. In addition, the water-based polyurethane film is easy to burn and not only prevents The combustion performance is poor, and more smoke is often generated during combustion. These defects undoubtedly limit the practical application of waterborne 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", Vol. 2...

Claims

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Application Information

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Patent Type & Authority Applications(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
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