Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

A kind of strongly hydrophobic gelatin leather finishing agent containing polysiloxane and glycidol and preparation method thereof

A leather finishing agent, glycidol technology, applied in leather surface treatment, small raw hide/large raw hide/leather/fur treatment, small raw hide/large raw hide/leather hide/fur chemical treatment, etc. Increase the hardness and other issues

Active Publication Date: 2015-10-28
QILU UNIV OF TECH
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Single aliphatic compounds such as aldehydes and polyols can locally improve the abrasion resistance, toughness, water resistance and viscosity of gelatin films (Hydrocolloids 2005, 19: 899 –907; Journal of Applied Polymer Science 1991, 43(10), 1789–1794), but the formation of a tight cross-linked network increases the hardness of the film, inhibits the soft feel of the gelatin film itself, and the overall performance is not high

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
  • A kind of strongly hydrophobic gelatin leather finishing agent containing polysiloxane and glycidol and preparation method thereof
  • A kind of strongly hydrophobic gelatin leather finishing agent containing polysiloxane and glycidol and preparation method thereof
  • A kind of strongly hydrophobic gelatin leather finishing agent containing polysiloxane and glycidol and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Add 12 grams of gelatin (accounting for 11.76% of the total mass) and 85 grams of deionized water into a 250ml three-neck reaction bottle equipped with a thermometer socket, a sampling port, and a condenser socket, stir and heat to 50°C. After the gelatin is completely dissolved, add 0.25mL of 3 mol / L sodium hydroxide, adjust the reaction pH to 10.0, add 10g of glycidol, and continue to stir for 8 hours after the reactants are not safely dissolved, and prepare the glycidol graft modified gelatin polymer solution (solution 1) .

[0058] Glycidyl modified gelatin 1 H NMR spectrum ( figure 1 ), the peaks of hydrogen on two carbons in the three-membered ring near δ = 2.8ppm disappear, and at the same time a new multiplet appears at δ = 3.6ppm, which may be -C H OH- and -C H 2 OH peak. The disappearance of 2 C-H absorption peaks and the formation of 1 C-H characteristic absorption peak in the spectrogram indicate that the epoxy group in the epoxy polysiloxane has re...

Embodiment 2

[0064] The described method is the same as that in Example 1, except that the mass of gelatin is changed to 3 grams (accounting for 2.83% of the total mass), the pH is changed to 6.0, and the mixture is heated and stirred to 40°C.

[0065] The viscosity of the obtained liquid is ~380 centipoise (50°C), and it is placed in a normal-pressure oven at 50°C for 6 hours to form a film with strong flexibility. The glass transition temperature (T g ) is 224℃, the T of gelatin film after modification g Decrease to -3 ℃ and 60 ℃, there is obvious microphase separation; the elongation at break of the raw gelatin film is 0, and the elongation at break of the modified gelatin film increases to 780%, indicating that the ductility of the modified gelatin is obviously enhanced; 13 C NMR shows that the γ-C signal on the lysine and arginine molecules on the gelatin molecule in the glycidol-modified gelatin product disappears, and new peaks appear at 61 and 63ppm, which are epoxy-modified col...

Embodiment 3

[0067] The described method is consistent with that of Example 1, except that the mass of gelatin is changed to 16 grams (accounting for 15.09% of the total mass), the pH is changed to 12.0, and the mixture is heated and stirred to 40°C.

[0068] The viscosity of the obtained material liquid is ~740 centipoise (50°C), and it is placed in a normal pressure oven at 50°C and dried for 6 hours to form a film with strong flexibility. The glass transition temperature (T g ) is 224℃, the T of gelatin film after modification g Decrease to 30 ℃ and 120 ℃, there is obvious microphase separation; the elongation at break of the raw gelatin film is 0, and the elongation at break of the modified gelatin film increases to 320%, indicating that the ductility of the modified gelatin is obviously enhanced; 13 C NMR shows that the γ-C signal on the lysine and arginine molecules on the gelatin molecule in the glycidol-modified gelatin product disappears, and new peaks appear at 61 and 63ppm, w...

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
glass transition temperatureaaaaaaaaaa
glass transition temperatureaaaaaaaaaa
glass transition temperatureaaaaaaaaaa
Login to View More

Abstract

The invention relates to a strongly hydrophobic gelatin leather finishing agent containing polysiloxane and glycidol and a preparation method thereof. The gelatin is dissolved in water to prepare an aqueous solution with a concentration of 2-20%. Under the conditions of 40~70°C and pH 6~12, add glycidol to the first reaction bottle to obtain solution 1; add surfactant to the second reaction bottle, the amount of surfactant is gelatin mass 0.5~20%, continue to stir, and at the same time add epoxy polysiloxane containing Si-O-Si repeating units in batches or continuously to obtain solution 2. Mix solution 1 and solution 2 in different proportions, weigh 15-20g and place it in a polytetrafluoroethylene mold, add 5-10mL of ethanol, tetrahydrofuran, methanol or a mixture of two or three solvents, and store at 40-80°C Drying in an oven under normal pressure obtains a gelatin leather finishing agent with excellent functions. The finishing agent has the characteristics of strong hydrophobicity, super ductility, heat resistance, oxidation resistance, and wet rub resistance.

Description

technical field [0001] The invention relates to a gelatin leather finishing agent, in particular to a strongly hydrophobic gelatin leather finishing agent containing polysiloxane and glycidol and a preparation method thereof. This leather finishing agent has the characteristics of strong hydrophobicity, super ductility, heat resistance and oxidation resistance, and is especially suitable for use as a finishing agent for leather bag leather, garment leather or car leather. Background technique [0002] Gelatin is a natural polymer material obtained by thermal denaturation or physical and chemical degradation of collagen. The main component of gelatin is protein. When the temperature is lower than that of sol-gel (37°C), the stronger intermolecular hydrogen bonds promote the formation of a network structure of gelatin molecules, and this system dehydrates to form a brittle film; gelatin molecules contain more affinity Water-based, gelatin film has the characteristics of easy ...

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 Patents(China)
IPC IPC(8): C09D189/00C09D187/00C14C11/00D06M15/15D06M15/65C08H1/00C08G81/00
Inventor 许静李天铎唐晓龙王彦涛赵志鹏
Owner QILU UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
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