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a nano-tio 2 Preparation method of modified carbonate polyurethane adhesive

A polyurethane adhesive and carbonate technology, applied in the directions of polyurea/polyurethane adhesives, adhesives, adhesive additives, etc., can solve the problems of poor antibacterial properties, toxic and harmful mechanical properties of solvents, etc., and achieve low cost and mechanical properties. And the effect of improved stability and simple process operation

Inactive Publication Date: 2017-05-31
FUJIAN NORMAL UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a solvent that is environmentally friendly and has excellent mechanical properties in view of the shortcomings of the existing solvent-based single-component polyurethane adhesives, such as toxic and harmful solvents, adhesive mechanical properties, anti-ultraviolet ability, and poor antibacterial performance. , strong anti-ultraviolet, antibacterial and mildew-proof solvent-based one-component polyurethane adhesive and preparation method thereof

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Add 15g of carbonate solvent with a boiling range of 90-130°C and 10g of polyether 2000 into a dry and clean three-neck flask equipped with a thermometer, agitator, and water separator, and reflux and dehydrate at 120°C for 0.5 hours; lower the temperature to 40°C , then add 10g TDI-80, then add 0.1g TiO with a particle size of 5-10 nm 2 After one hour, the temperature was raised to 60° C., and the stirring was stopped after 2 hours of heat preservation. Cool down, stop the machine and discharge. After measurement, the obtained adhesive is light yellow, with an NCO content of 13.22%, a surface dry time of 2 hours, a hard drying time of 6 hours, and a tensile shear strength of 14.9MPa.

Embodiment 2

[0025] Add 15g of carbonate solvent with a boiling range of 90-130°C and 30g of polyether 2000 into a dry and clean three-neck flask equipped with a thermometer, stirrer, and water separator, and reflux and dehydrate at 115°C for 2 hours; lower the temperature to 45°C , then add 7.5g TDI-80, then add 0.2g TiO with a particle size of 5-10 nm 2 After one hour, the temperature was raised to 55° C., and the stirring was stopped after 2 hours of heat preservation. Cool down, stop the machine and discharge. After measurement, the obtained adhesive is light yellow, with an NCO content of 11.15%, a surface dry time of 2 hours, a hard drying time of 6 hours, and a tensile shear strength of 3MPa.

Embodiment 3

[0027] Add 30g of carbonate solvent with a boiling range of 110-170°C and 20g of polyether 2000 into a dry and clean three-neck flask equipped with a thermometer, agitator, and water separator, and reflux and dehydrate at 120°C for 1.5 hours; lower the temperature to 40°C , then add 20g TDI-80, then add 0.3g TiO with a particle size of 5-10 nm 2 After one hour, the temperature was raised to 50° C., and the stirring was stopped after 2 hours of heat preservation. Cool down, stop the machine and discharge the material. According to the measurement, the obtained adhesive is light yellow, the NCO content is 16.46%, the surface drying time is 2 hours, the hard drying time is 6 hours, and the tensile shear strength is 14.3MPa.

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PUM

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Abstract

The invention relates to a preparation method of a nano TiO2 modified carbonate polyurethane adhesive. The technical scheme is as follows: the method comprises the following steps: 1. sequentially adding 100-500 parts of component A and 80-300 parts of component B into a three-neck flask, and dehydrating under reflux at 112-120 DEG C for 0.5-2 hours to obtain a mixture X; 2. cooling the mixture X to 40-50 DEG C, adding 60-150 parts of component C, and stirring for 0.5 hour to obtain a mixture Y; and 3. adding 1-6 parts of nano TiO2 into the mixture Y, heating to 50-60 DEG C, and keeping the temperature to react for 2 hours to obtain the carbonate-type single-component polyurethane adhesive. By adopting the carbonate solvent and nano TiO2, the method has the advantages of no toxicity, low cost and simple technical operation. The obtained adhesive has the advantages of higher mechanical properties, higher stability, ultraviolet resistance, mildew resistance and the like.

Description

technical field [0001] The invention relates to the technical field of adhesives, in particular to a nano-TiO 2 The preparation method of the modified carbonate polyurethane adhesive. Background technique [0002] Polyurethane adhesive refers to the adhesive containing carbamate group (-NHCOO-) or isocyanate group (-NCO) in the molecular chain. Among them, the solvent-based one-component polyurethane adhesive is composed of polyurethane prepolymer and solvent. It uses the air or the moisture on the surface of the substrate to cure and bond. It does not need to be used in proportion with other crosslinking agents during construction. One-component polyurethane adhesive is more convenient to use. Therefore, one-component polyurethane adhesive has become a hot spot of research at home and abroad, and its use is becoming more and more extensive. It is used in foamed plastics, wood, leather goods, textiles, ceramics, automotive glass, shoes and other fields. [0003] In order ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J175/08C09J11/04C08G18/76C08G18/48C08G18/08
Inventor 杨发福韩庆帅黄秋锋郑秋鉴廖启武游杰
Owner FUJIAN NORMAL UNIV