Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Antibacterial type castor oil based cationic-aqueous polyurethane emulsion and preparation method thereof

A water-based polyurethane, castor oil-based technology, used in polyurea/polyurethane coatings, biocide-containing paints, antifouling/underwater coatings, etc., can solve the problems of few antibacterial species and weak antibacterial ability, and achieve excellent antibacterial performance. , Enhance antibacterial properties, reduce the effect of use

Inactive Publication Date: 2017-09-08
WUHAN UNIV OF TECH
View PDF5 Cites 17 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Cationic water-based polyurethane has excellent performance. Because the molecule contains positively charged quaternary ammonium salt groups, it has a good affinity for negatively charged cotton fibers and is easy to form hydrogen bonds with hydroxyl groups in cellulose, making the fabric after finishing It has good durability; at the same time, due to the existence of quaternary ammonium salt groups, cationic polyurethane has a certain antibacterial effect, but there are fewer antibacterial types and weak antibacterial ability

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The preparation of embodiment 1 antibacterial castor oil-based cationic aqueous polyurethane emulsion

[0042] Polyethylene adipate (PBA-1000) 9.7g, castor oil (CO) 5.3g is added in the reactor (wherein, PBA-1000 accounts for 30.7% of total resin quality, and CO accounts for 16.8% of total resin quality ), remove water under reduced pressure and vacuum at 115°C for 1.5h, and when the temperature of the system drops to 60°C, add 12.2g of isophorone diisocyanate (IPDI) and 2 drops of dibutyltin dilaurate (DBTDL) (about 0.01-0.02 g, the same below), the R value is 1.2, and the system is kept at 80°C for 2h under a nitrogen atmosphere. Subsequently, 0.6 g of 1,4-butanediol (BDO) was added to the system, and the reaction was continued at 80° C. for 1 h.

[0043] Cool the system to 55°C, add 2.5g of N-methyldiethanolamine (MDEA) dropwise (MDEA accounts for 8% of the total resin mass), keep the temperature for 1.5h, add 4.0g butanone, stir and dilute to adjust the viscosity o...

Embodiment 2

[0046] Embodiment 2, the preparation of antibacterial castor oil-based cationic aqueous polyurethane emulsion

[0047] Add polyethylene adipate (PBA-1000) 9.3g, castor oil (CO) 5.7g in the reactor (wherein, PBA-1000 accounts for 30.7% of total resin quality, and CO accounts for 16.8% of total resin quality ), remove water under reduced pressure and vacuum for 1.5h at 115°C, and add 13.8g of isophorone diisocyanate (IPDI) and 2 drops of dibutyltin dilaurate (DBTDL) when the system temperature drops to 60°C, and the R value is 1.2 , the system was kept at 80°C for 2h under nitrogen atmosphere. Subsequently, 1.0 g of 1,4-butanediol (BDO) was added to the system, and the reaction was continued at 80° C. for 1 h.

[0048] Cool the system to 45°C, add 2.7g of N-methyldiethanolamine (MDEA) dropwise (MDEA accounts for 8% of the total resin mass), keep the temperature for 2.0h, add 4.0g butanone, stir and dilute to adjust the viscosity of the system (the viscosity is 30.8mPa·s).

[...

Embodiment 3

[0051] Embodiment 3, the preparation of antibacterial castor oil-based cationic aqueous polyurethane emulsion

[0052] Polycarbonate diol (PCDL-1000) 9.7g, castor oil (CO) 5.3g is added in the reactor (wherein, PCDL-1000 accounts for 30.7% of total resin quality, CO accounts for 16.8% of total resin quality), Remove water under reduced pressure and vacuum at 115°C for 1.5h, and when the temperature of the system drops to 60°C, add 14.4g of dicyclohexylmethane-4,4-diisocyanate (HMDI) and 2 drops of dibutyltin dilaurate (DBTDL), R The value is 1.2, and the system is kept at 70° C. for 3 hours under a nitrogen atmosphere. Subsequently, 0.4 g of ethylene glycol (EG) was added to the system, and the reaction was continued at 80° C. for 1 h while being kept warm.

[0053] Cool the system to 55°C, add 2.5g of N-methyldiethanolamine (MDEA) dropwise (MDEA accounts for 8% of the total resin mass), keep the temperature for 1.5h, add 4.0g butanone, stir and dilute to adjust the viscosity...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
tensile strengthaaaaaaaaaa
tensile strengthaaaaaaaaaa
tensile strengthaaaaaaaaaa
Login to View More

Abstract

The invention relates to an antibacterial type castor oil based cationic-aqueous polyurethane emulsion and a preparation method thereof. The preparation method is characterized by including the steps of 1), adding polyester polyol, castor oil, aliphatic diisocyanate, a catalyst and a small-molecular extender to a reactor for reaction; 2), performing reaction after adding a cationic hydrophilic chain extender; 3), adding a neutralizer to a castor oil based cationic-aqueous polyurethane prepolymer prior to adding in deionized water after reaction to perform high-speed shear emulsification, and carrying out removal of butanone to obtain the castor oil based aqueous polyurethane emulsion; 4), adding a nano titanium dioxide dispersion to the castor oil based aqueous polyurethane emulsion for ultrasonic dispersion to obtain the antibacterial type castor oil based cationic-aqueous polyurethane emulsion. The preparation method is simple in process and green and environment friendly, and the emulsion is high in antibacterial property and can be used in the fields of antibiotic finish and the like of fabric.

Description

technical field [0001] The invention relates to an antibacterial castor oil-based cationic water-based polyurethane emulsion and a preparation method thereof, belonging to the field of fine polymer materials and preparation thereof. Background technique [0002] Water-based polyurethane (WPU) is a kind of polymer synthetic material. Its coating film has excellent properties such as high / low temperature resistance, abrasion resistance, corrosion resistance and flexibility. It is mainly used in fabric finishing, leather processing, coatings, etc. , wood processing, building materials, papermaking and adhesives and other industries, which use water as the dispersion medium, has the advantages of non-toxic, environmental protection and non-combustible. [0003] Cationic water-based polyurethane has excellent performance. Because the molecule contains positively charged quaternary ammonium salt groups, it has a good affinity for negatively charged cotton fibers and is easy to for...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/67C08G18/66C08G18/42C08G18/44C08G18/32C08G18/12C09D175/14C09D5/14D06M15/572D06M11/46
CPCC08G18/12C08G18/3206C08G18/3275C08G18/36C08G18/4238C08G18/44C08G18/6662C08K2003/2241C08K2201/011C09D5/14C09D175/14D06M11/46D06M15/572D06M16/00
Inventor 易英张延飞王洲洲徐云超冯皓唐明
Owner WUHAN UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com