Polysiloxane, glycidol and quaternary ammonium salt-containing multifunctional gelatin leather finishing agent and preparation method

A leather finishing agent, glycidol technology, applied in leather surface treatment, biocide-containing paint, antifouling/underwater coatings, etc., can solve the problems of poor water resistance and corrosion resistance, strong plastic feeling, etc., and achieve flexibility The effect of improving, increasing elastic modulus, improving anti-corrosion and antibacterial ability

Active Publication Date: 2013-12-11
山东山科美谷科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Gelatin is a hydrolyzed product of collagen protein, which has become an important raw material for the preparation of protein films. Like other natural polymer materials, this type of protein material has problems such as strong plastic feeling, poor water resistance and corrosion resistance after forming a film.

Method used

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  • Polysiloxane, glycidol and quaternary ammonium salt-containing multifunctional gelatin leather finishing agent and preparation method
  • Polysiloxane, glycidol and quaternary ammonium salt-containing multifunctional gelatin leather finishing agent and preparation method
  • Polysiloxane, glycidol and quaternary ammonium salt-containing multifunctional gelatin leather finishing agent and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] Add 12 grams of gelatin (accounting for 11.76% of the total mass) in the 250ml three-necked reaction flask equipped with a thermometer socket, a sampling port and a condenser socket, and its molecular structure is verified by infrared spectroscopy, see figure 1 ), 85 grams of deionized water, stirring and heating to 50°C, after the gelatin is completely dissolved, add 0.25mL of 3 mol / liter sodium hydroxide, adjust the reaction pH to 10.0, add 13g of epoxy quaternary ammonium salt, and the reaction product is safe After dissolving, the stirring was continued for 8 hours to prepare a gelatin polymer solution (solution 1) grafted with epoxy quaternary ammonium salt.

[0069] The infrared spectrogram of epoxy quaternary ammonium salt modified gelatin ( image 3 ), the original 1643cm -1 The N~H absorption peak of the primary amino group disappears, and at the same time at 1475cm -1 -N(CH 3 ) 3 C-H new absorption peaks. One N-H absorption peak that appeared in the spec...

Embodiment 2

[0077] The described method is consistent with Example 1, the only difference is that the ratio of solutions 1, 2, and 3 is replaced by a mass ratio of 2:1:1, wherein the mass of solution 1 is 9g, solution 2 is 4.5g, and solution 3 is 4.5g .

[0078] The viscosity of the obtained liquid is ~620 centipoise (50°C), and it is placed in a normal-pressure oven at 45°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 142 ℃ and 185 ℃, there is obvious microphase separation; the elongation at break of the raw gelatin film is 0, and the tensile strength is 1.3MPa, and the elongation at break of the modified gelatin film increases to 320%, and the tensile strength increases to 13.4 MPa, indicating that the flexibility of the modified gelatin is significantly enhanced; the antibacterial rate of the raw gelatin film against Escherichia coli is 18.3%, and that of the modi...

Embodiment 3

[0081] 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.

[0082] The viscosity of the obtained liquid is ~480 centipoise (50°C), and it is placed in a normal pressure oven at 45°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 126 ℃ and 175 ℃, there is obvious microphase separation; the elongation at break of the raw gelatin film is 0, and the tensile strength is 1.3 MPa, and the elongation at break of the modified gelatin film increases to 375%, and the tensile strength increases to 3.4 MPa, indicating that the flexibility of the modified gelatin is significantly enhanced; the antibacterial rate of the raw gelatin film against Escherichia coli is 18.3%, and that of the modified gelatin...

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Abstract

The invention relates to a polysiloxane, glycidol and quaternary ammonium salt-containing multifunctional gelatin leather finishing agent and a preparation method. The preparation method comprises the following steps: dissolving gelatin in water to prepare aqueous solution with mass concentration of 2-20 percent; adding epoxy quaternary ammonium salt into a first reaction flask under the conditions of temperature of 40-70 DEG C and pH of 6-12 to obtain solution 1; adding glycidol into a second reaction flask to obtain solution 2; adding a surfactant into a third reaction flask, and meanwhile adding Si-O-Si repetitive unit-containing epoxypolysiloxane in batches or continuously to obtain solution 3; mixing the solution 1, the solution 2 and the solution 3 in different proportions, weighing 15-20 g of the mixed solution to be placed in a mold of polytetrafluoroethylene, adding 5-10 mL of one or three or four of ethanol, tetrahydrofuran, acetone and methanol and drying in a normal pressure drying oven at the temperature of 40-80 DEG C to obtain the multifunctional gelatin leather finishing agent. The finishing agent has the characteristics of strong hydrophobicity, flexible film, antibacterial property, high heat stability, organic solvent resistance, wet scrubbing resistance and the like.

Description

technical field [0001] The invention relates to a gelatin leather finishing agent, in particular to a multifunctional gelatin leather finishing agent containing polysiloxane, glycidol and quaternary ammonium salt and a preparation method. This kind of leather finishing agent has the characteristics of film flexibility, strong hydrophobicity, antibacterial, heat resistance, oxidation resistance, organic solvent resistance, wet rub resistance, etc., and is especially suitable as a finishing agent for bag leather, garment leather or car leather. Background technique [0002] Gelatin films are used in biological and chemical fields such as coating, packaging, leather tanning, regenerative medicine, tissue engineering, and drug delivery. The conventional strategy to improve the performance of gelatin films is chemical modification. There are many ways to modify gelatin, among which the plasticizing modification mainly uses some polyols, which contain a large number of hydroxyl gr...

Claims

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Application Information

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IPC IPC(8): C09D189/00C09D187/00C09D5/14C14C11/00D06M15/15D06M15/65C08H1/00C08G81/00
Inventor 许静李天铎唐晓龙姜青伟
Owner 山东山科美谷科技发展有限公司
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