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

Castor oil modified weak cation polyurethane color fixing agent and preparation method thereof

A technology of weak cations and castor oil, which is applied in dyeing, textiles and papermaking to achieve the effects of improving color fastness, enhancing binding fastness and cohesive force, and reducing dependence

Inactive Publication Date: 2015-03-25
DONGHUA UNIV
View PDF4 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a castor oil modified weak cationic polyurethane color fixing agent and its preparation method, the reaction ensures that the curing agent has enough isocyanate end groups to combine with the cloth surface and dye molecules without affecting Improves the color fastness of fabrics

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Castor oil modified weak cation polyurethane color fixing agent and preparation method thereof
  • Castor oil modified weak cation polyurethane color fixing agent and preparation method thereof
  • Castor oil modified weak cation polyurethane color fixing agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Prepolymerization of polyurethane:

[0028] Add 50 parts of castor oil into the dry reaction kettle, heat up to 110-120°C, dehydrate for 2 hours under vacuum degree of 0.05MPa, add 1 part of dibutyltin laurate (DBTL) under the protection of dry nitrogen, keep warm at about 75°C, drop Add 60 parts of TDI, keep it warm for about 3 hours, cool down to 50°C, and add 20 parts of acetone to dilute.

[0029] (2) Polyurethane introduces hydrophilic groups and chain extension and neutralization reactions:

[0030] Add 8 parts of 2,2-dimethylolpropionic acid (DMPA) in dimethylformamide (DMF) solution for chain extension, introduce hydrophilic groups, control the temperature at 50°C, and react until the content of -NCO groups After reaching the theoretical value, slowly add 7.5 parts of triethylamine for neutralization, and react for 4 hours, wherein the amount of DMF is 15 parts.

[0031] (3) Polyurethane chain extension reaction:

[0032] Add 10 parts of diethylenetriamin...

Embodiment 2

[0041] (1) Prepolymerization of polyurethane:

[0042] Add 20 parts of castor oil into the dry reaction kettle, raise the temperature to 110-120°C, dehydrate for 2 hours under vacuum degree of 0.05MPa, add 3 parts of dibutyltin laurate (DBTL) under the protection of dry nitrogen, keep warm at about 75°C, drop Add 15 parts of TDI, keep it warm for about 3 hours, cool down to 50°C, and add 20 parts of acetone to dilute.

[0043] (2) Polyurethane introduces hydrophilic groups and chain extension reaction:

[0044] Add 3 parts of 2,2-dimethylolpropionic acid (DMPA) in dimethylformamide (DMF) solution for chain extension, introduce hydrophilic groups, control the temperature at 50°C until the content of -NCO groups reaches The theoretical value, then slowly add 3 parts of triethylamine, react for about 4 hours, and the amount of DMF is 20 parts.

[0045] (3) Polyurethane chain extension reaction:

[0046] Add 5 parts of diethylenetriamine for chain extension, the reaction temper...

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

No PUM Login to View More

Abstract

The invention relates to a castor oil modified weak cation polyurethane color fixing agent and a preparation method thereof. The castor oil modified weak cation polyurethane color fixing agent is synthesized by adopting castor oil, methylbenzene 2,4-diisocyanate, dimethylolpropionic acid, acetone, dimethylformamide, tributylamine, diethylenetriamine, epichlorohydrin, sodium hydrogen sulfite and the like as raw materials. The production process comprises polyurethane pre-polymerization reaction, modified chain extension, closed reaction and chain removal reaction. The renewable castor oil is adopted as the raw material, so that the dependence on the petroleum can be reduced; the polyurethane synthesized by the castor oil has multiple branch chains, and the appropriate cross-linking can be generated when in curing, so that the combination firmness and cohesive force with a fabric can be improved; the diethylenetriamine is adopted to seal the end, an epoxy group is introduced onto the molecular chain and the epoxy group also can have chemical reaction with hydroxyl and amino group on the dye molecules, so that the dye is integrated with a film formed by a web rubbing fastness promoter into a whole, fibers, dyes and polyurethane films are integrated together, and the dye flooding can be fixed.

Description

technical field [0001] The invention belongs to the field of polyurethane color fixing agent and its preparation, in particular to a castor oil modified weak cationic polyurethane color fixing agent and its preparation method. Background technique [0002] The loss caused by insufficient color fastness of my country's textiles, whether exported or domestically sold, is very huge, and color-fixing agents can effectively improve the color fastness indicators of fabrics. Commonly used color-fixing agents such as color-fixing agents Y, M, and RD‐GE etc. Due to the presence of formaldehyde, it does not meet the requirements of environmental protection. In addition, the commonly used formaldehyde-free color fixing agent has insufficient color fastness, which makes the hand feel of the fabric worse, and the strength and other indicators decrease. [0003] Chinese patent CN101215791A mentions a preparation method of a cationic polyurethane modified color fixing agent, which has a goo...

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
IPC IPC(8): C08G18/67C08G18/34C08G18/32C08G18/38C08G18/10D06P5/08
CPCC08G18/10C08G18/3228C08G18/348C08G18/67C08G18/7614C08G18/831D06P5/08
Inventor 王志鑫刘婷婷王炜
Owner DONGHUA UNIV
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