Organosilicon-modified waterborne polyurethane composite material and applications thereof

A technology of water-based polyurethane and composite materials, applied in the direction of polyurea/polyurethane coatings, polyurea/polyurethane adhesives, paper coatings, etc., can solve the problems of large specific surface area, high thermal stability, low density, etc., and achieve a simple process. , The effect of improving hardness and heat resistance, and improving water resistance

Inactive Publication Date: 2012-12-19
INST OF CHEM CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Trapezoidal polysilsesquioxane has the characteristics of large specific surface area, low density, and high thermal stability, and there are no public reports

Method used

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  • Organosilicon-modified waterborne polyurethane composite material and applications thereof
  • Organosilicon-modified waterborne polyurethane composite material and applications thereof
  • Organosilicon-modified waterborne polyurethane composite material and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0067] Example 1

[0068] 1) According to the ladder polysilsesquioxane (R in the aforementioned ladder polysilsesquioxane structure) 1 is phenyl; n is 40): aminosilane coupling agent (R in the aforementioned aminosilane coupling agent structure 2 for OCH 3 , m is 3): the weight ratio of tetramethyl ammonium hydroxide: ether is the ratio of 100: 50: 2.5: 400, the above materials are mixed, and the temperature is 50 ° C to carry out stirring reaction for 24 hours; Tetramethylamine hydroxide, to obtain amino-containing ladder polysilsesquioxane (R 1 is phenyl; n is 40);

[0069] 2) According to the weight ratio of toluene-2,4-diisocyanate: polycaprolactone diol: 2,2-dimethylolpropionic acid: dibutyltin dilaurate: acetone is 100:350:30:2 The ratio of: 400, the above materials are mixed evenly, and the reaction is carried out at a temperature of 60 ° C for 6 hours, and after the reaction is completed, a hydrophilic polyurethane prepolymer whose end group is -NCO is obtained; ...

Example Embodiment

[0076] Example 2

[0077] Basically the same as Example 1, except that the hydrophilic polyurethane prepolymer whose end group is -NCO, the amino group-containing ladder polysilsesquioxane (R 1 is phenyl; n is 40), the weight ratio of dibutyltin dilaurate and acetone was changed from 100:10:1:100 to 100:0.2:1:100.

[0078] The properties of the obtained composite material are similar to those in Example 1, and it can be used as a surface coating material for wood, paper, etc., or as a finishing agent for fabrics and leather, or as a finishing agent for fabrics, or as an adhesive. The coating properties of the composite material are shown in Table 1, and the thermal weight loss curve is shown in Table 1. figure 2 shown.

Example Embodiment

[0079] Example 3

[0080] Basically the same as Example 1, except that the hydrophilic polyurethane prepolymer whose end group is -NCO, the amino group-containing ladder polysilsesquioxane (R 1 is phenyl; n is 40), the weight ratio of dibutyltin dilaurate and acetone was changed from 100:10:1:100 to 100:20:1:100.

[0081] The properties of the obtained composite material are similar to those in Example 1, and it can be used as a surface coating material for wood, paper, etc., or as a finishing agent for fabrics and leather, or as a finishing agent for fabrics, or as an adhesive. The coating properties of the composite material are shown in Table 1, and the thermal weight loss curve is shown in Table 1. figure 2 shown.

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Abstract

The invention belongs to the technical field of waterborne coating preparation processes, and particularly relates to an organosilicon-modified waterborne polyurethane composite material and applications thereof. The organosilicon-modified waterborne polyurethane composite material comprises a first step of preparing amino-containing ladder-shaped polysilsesquioxane; a second step of reacting the polysilsesquioxane and a hydrophilic polyurethane prepolymer with end groups of -NCO, to form a prepolymer of the organosilicon-modified waterborne polyurethane; and a final step of adding an alkaline neutralizer and distilled water, and stirring for dispersion. The organosilicon-modified waterborne polyurethane composite material is characterized in that the amino-containing ladder-shaped polysilsesquioxane can react with -NCO of the hydrophilic polyurethane prepolymer with end groups of -NCO, enables the prepolymer to extend chains and has a cross-linking reaction; water-resistant performance of the prepared composite material is greatly increased; and simultaneously hardness and heat resistance of polyurethane are improved significantly due to the introduction of the ladder-shaped polysilsesquioxane. The composite material can be used as surface coating materials of woods, paper and the like, or used as coating agents of textiles and leather.

Description

technical field [0001] The invention belongs to the technical field of water-based paint preparation technology, and particularly relates to an organosilicon-modified water-based polyurethane composite material and its application. Background technique [0002] Water-based polyurethane coatings use water as the dispersion medium, and have the advantages of low odor, non-toxicity, non-flammability, no environmental pollution, good adhesion, good wear resistance, good low temperature flexibility and high mechanical strength, so they have developed rapidly in recent years. However, due to the presence of hydrophilic groups in the polyurethane molecular chain, its water resistance is poor. Therefore, how to improve its water resistance has become an urgent problem to be solved, and its solvent resistance and physical and mechanical properties also need to be further improved. Increasing the degree of crosslinking is the most effective way to improve its water resistance. Howev...

Claims

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Application Information

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IPC IPC(8): C08G18/61C08G18/12C08G77/388C09D175/08C09D175/06C09J175/08C09J175/06D06M15/653D21H19/00
Inventor 马永梅安晶晶成惠民曹新宇刘合梅
Owner INST OF CHEM CHINESE ACAD OF SCI
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