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Antifouling seal-cleaning aqueous polyurethane leather finishing agent and preparation method thereof

A water-based polyurethane and leather finishing agent technology, applied in antifouling/underwater coatings, polyurea/polyurethane coatings, leather surface treatment, etc., can solve the problems of biofouling and easy to be polluted

Inactive Publication Date: 2014-05-07
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polyurethane materials and their products are easily contaminated during long-term use, resulting in biofouling. Therefore, the development of waterborne polyurethane coatings with antifouling and self-cleaning properties has very important application value.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The preparation of polyethylene glycol ethyl acrylate-based monomer, the specific operation method is as follows: Weigh 20.00g polyethylene glycol monoethyl ether (M n =2000), measure 20ml of triethylamine and 200ml of dichloromethane into a 250ml three-necked flask, drop 8.0ml of methacryloyl chloride into the three-necked flask, and react at 20°C for 24 h. After suction filtration, concentration, and vacuum drying, polyethylene glycol side chains were obtained. Butyl titanate was dissolved in absolute ethanol, heated to 50°C, and acid was slowly added to adjust its pH. After 4.5 hours of reaction, a uniform, stable and transparent TiO 2 Sol, spare. Add 6.96 g of toluene diisocyanate and 300 ml of tetrahydrofuran solvent, stir mechanically under nitrogen protection, and react at 60°C for 30 min. Add 1.5g of dimethylolpropionic acid, and stir the reaction at 80°C for 2h. Add 5.55g initiator tetraphenyl glycol and catalyst, and react at 30°C for 24h to obtain polyethy...

Embodiment 2

[0028] The preparation of polyethylene glycol methacrylate-based monomer, the specific operation method is as follows: Weigh 20.00 g polyethylene glycol monomethyl ether (M n=2000), measure 20ml triethylamine and 200ml dichloromethane into a 250ml three-neck flask. 8.0ml of methacryloyl chloride was dropped into the three-necked flask. React at 20°C for 24 h. Suction filtration, concentration, and drying to obtain polyethylene glycol side chains. Butyl titanate was dissolved in absolute ethanol. After heating up to 50°C, acid was slowly added to adjust its pH. After 4.5 hours of reaction, a uniform, stable and transparent TiO 2 Sol. Weigh 30.00 g polytetrahydrofuran ether (M n =2000) into a 500ml three-necked flask, vacuum dehydrated for 2h, and the temperature was lowered to 60°C. Added 10.08g of diphenylmethane diisocyanate, 300ml of tetrahydrofuran solvent, stirred mechanically under nitrogen protection, and reacted at 60°C for 30min. Add 1.5g of dimethylolpropionic ac...

Embodiment 3

[0030] The preparation of polyethylene glycol acrylate-based monomer, the specific operation method is as follows: Weigh 20.00g polyethylene glycol (M n =2000), measure 20ml triethylamine and 200ml dichloromethane into a 250ml three-necked flask. 8.0ml of methacryloyl chloride was dropped into the three-necked flask. React at 25°C for 24 h. Suction filtration, concentration, and drying to obtain polyethylene glycol side chains. Butyl titanate was dissolved in absolute ethanol. After heating to 50 °C, acid was added to adjust its pH. After 4.5 hours of reaction, a uniform, stable and transparent TiO 2 Sol. Weigh 30.00 g polytetrahydrofuran (M n =2000), added to a 500ml three-necked flask, vacuum dehydrated for 2h, added 6.72g of hexamethylene diisocyanate, added 300ml of THF, stirred mechanically under nitrogen protection, and reacted at 60°C for 30min. Add 1.5g of dimethylolpropionic acid, and stir the reaction at 80°C for 2h. Add 5.55 g of tetraphenyl diol and catalyst,...

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PUM

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Abstract

The invention discloses an antifouling seal-cleaning aqueous polyurethane leather finishing agent and a preparation method thereof. The method comprises the following steps of: firstly utilizing a macromolecule initiating technology to synthesize a novel copolymer which takes polyurethane as a main chain and takes polyethylene glycol as a side chain; and then introducing nano TiO2 into a polyurethane copolymer matrix grafted by the polyethylene glycol through a sol-gel method to prepare the novel polyethylene glycol grafted polyurethane nano composite leather finishing material. The good protein adsorption resistance of the polyethylene glycol, the photocatalytic activity of the TiO2 and the special nano effect of nano grains are combined, so that the transparency and the film-forming performance of a coating material are not influenced, and the photocatalytic seal-cleaning performance, the protein adsorption resistance and the microorganism adsorption property and the sterilization and the mildew resistance of the coating can be obviously improved; and the mechanical strength, the heat-resisting stability, the wear resistance, the ultraviolet aging resistance and the hygiene property of the coating are improved.

Description

technical field [0001] The invention relates to the research field of anti-fouling self-cleaning materials and the field of development of water-based polyurethane leather finishing materials, in particular to an anti-fouling self-cleaning water-based polyurethane leather finishing agent and a preparation method thereof. Background technique [0002] Natural leather is favored by consumers for its excellent moisture absorption, breathability, and heat dissipation, but it is inevitably disturbed by organic stains such as various dyes, food and beverages, and proteins during its life cycle: in addition, in suitable The temperature and humidity conditions can easily lead to the growth and reproduction of bacteria and the formation of biofilm, thus causing biofouling and seriously affecting its service life and human health. [0003] Since the concept of "self-cleaning" was put forward in the 1990s, the research and commercialization of related aspects have developed rapidly. A...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/67C08G18/44C08G18/76C08G18/75C08K3/22C14C11/00C09D175/14C09D5/16C09D7/12
Inventor 穆畅道王春华林炜张广照
Owner SICHUAN UNIV
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