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 p

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
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Example Embodiment

[0067] Example 1:

[0068] Add 12 grams of gelatin (11.76% of the total mass) into a 250ml three-necked reaction flask equipped with thermometer socket, sampling port and condenser socket. Its molecular structure is verified by infrared spectroscopy, see figure 1 ), 85 grams of deionized water, stirred and heated to 50 ℃, after the gelatin is completely dissolved, add 0.25 mL of 3 mol / L sodium hydroxide, adjust the reaction pH to 10.0, add 13 g of epoxy quaternary ammonium salt, and the reactants are not safe After dissolution, continue to stir for 8 hours to prepare an epoxy quaternary ammonium salt grafted modified gelatin polymer solution (solution 1).

[0069] The infrared spectrum of epoxy quaternary ammonium salt modified gelatin ( image 3 ), the original 1643cm -1 The N~H absorption peak of the primary amino group disappeared at 1475cm -1 -N(CH 3 ) 3 The new absorption peak of C-H. One N-H absorption peak in the spectrum disappears, and one ~N(CH 3 ) 3 The characteristic ...

Example Embodiment

[0076] Example 2:

[0077] The described method is the same as Example 1, the only difference is that the ratio of solutions 1, 2, and 3 is changed to a mass ratio of 2:1:1, where the mass of solution 1 is 9g, solution 2 is 4.5g, and solution 3 is 4.5g .

[0078] The obtained material liquid has a viscosity of ~620 centipoise (50°C), and is placed in an atmospheric oven at 45°C for drying for 6 hours to form a flexible film. The glass transition temperature of the raw material gelatin film (T g ) Is 224℃, the T of the modified gelatin film g When the temperature drops to 142℃ and 185℃, there is obvious microphase separation; the breaking elongation of the raw gelatin film is 0, and the tensile strength is 1.3MPa. After modification, the breaking elongation of the gelatin film is increased to 320%, and the tensile strength is increased to 13.4 MPa, indicating that the flexibility of the modified gelatin was significantly enhanced; the antibacterial rate of the raw gelatin film ag...

Example Embodiment

[0080] Example 3:

[0081] The described method is the same as in Example 1, except that the mass of gelatin is changed to 3 grams (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 obtained material liquid has a viscosity of ~480 centipoise (50°C), and is placed in an atmospheric oven at 45°C for drying for 6 hours to form a flexible film. The glass transition temperature of the raw material gelatin film (T g ) Is 224℃, the T of the modified gelatin film g When the temperature drops to 126℃ and 175℃, there is obvious microphase separation; the breaking elongation of the raw gelatin film is 0, and the tensile strength is 1.3MPa. After modification, the breaking elongation of the gelatin film increases to 375%, and the tensile strength increases to 3.4 MPa, indicating that the flexibility of the modified gelatin was significantly enhanced; the antibacterial rate of the raw gelatin film against E. coli was 18.3%, and the...

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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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