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Manufacturing method and application of shape-memory polymer leather wrinkle-removing finishing material

A memory polymer, leather technology, applied in polyurea/polyurethane coating, application, leather drying and other directions, can solve the problems of leather clothing storage mode crease, lack of anti-wrinkle performance, difficult to remove wrinkles, etc., to achieve obvious anti-wrinkle and anti-wrinkle Wrinkle effect, excellent air permeability, good low temperature flexibility

Active Publication Date: 2019-01-08
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Today's leather products often have good air permeability, good gloss and anti-fouling ability, but they are lacking in anti-wrinkle performance. For example, the surface of leather shoes often produces wrinkles after repeated twists and turns. It is difficult to remove; the surface of leather clothing will also have obvious creases due to improper storage for a long time

Method used

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  • Manufacturing method and application of shape-memory polymer leather wrinkle-removing finishing material
  • Manufacturing method and application of shape-memory polymer leather wrinkle-removing finishing material
  • Manufacturing method and application of shape-memory polymer leather wrinkle-removing finishing material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A method for making a shape-memory polymer leather anti-wrinkle finishing material,

[0037] 1. Use DMF (N,N-dimethylformamide) Molecular sieves were dried for 24 hours to obtain dry DMF. Solid PCL was placed in a drying oven for heating and melting to obtain liquid PCL. 10 g of liquid PCL (polycaprolactone 2000) was placed in a container with mechanical stirring, argon protection, a condenser tube and a thermometer. In a four-neck flask, vacuum dehydration was carried out at 120°C in a water bath for 1h, then dry 60g DMF and 3.75g MDI (diphenylmethane diisocyanate) were added under the condition of argon protection, and the reaction was stirred at 75°C for 2h to obtain Prepolymer, take out a small amount of prepolymer for -NCO titration;

[0038] 2. Add 0.9g 1,4-BDO (1,4-butanediol) and 38g DMF to the prepolymer obtained in step 1, carry out chain extension reaction at 75°C for 2 hours, and obtain a compound with a solid content of 15 % linear SMPU solution (linear s...

Embodiment 2

[0041] Example 2: The shape-memory polymer selected in this embodiment is shape-memory polylactic acid, and the preparation method of the coating material is implemented according to the following steps:

[0042] Pour 5g of polylactic acid (PLA) and 0.5g of benzophenone into the reagent bottle, add 50g of dichloromethane solvent, and after sealing, stir on a magnetic stirrer at a speed of 300r / min for 20h-24h. The obtained solution is evenly coated on leather of suitable size, and dried at room temperature or in an oven at 40°C-50°C for 15h-24h to obtain a wrinkle-resistant leather product coated with a shape memory polymer.

[0043] The measured glass transition temperature is around 55°C. Heat the flat leather coated with shape-memory polylactic acid to about 60°C, fold it in half, fix its shape and cool it to room temperature, and then heat it again to about 60°C, after about 3 minutes, you can find that the folded leather gradually unfolds , until the crease disappears an...

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Abstract

The invention provides shape memory polymer leather anti-wrinkling coating material manufacturing and leather anti-wrinkling application. A manufacturing method includes the steps that DMF is dried through a molecular sieve to obtain dried DMF, liquid PCL is placed in a reaction container for vacuumizing and dehydration, then dried DMF and MDI are added under the argon protection condition, a stirring reaction is conducted for 1.5-2.5 h at the temperature of 70-80 DEG C, and a prepolymer is obtained; 1,4-BDO and the dried DMF are added into the prepolymer obtained in the first step, a chain extension reaction is conducted at the temperature of 70-80 DEG C, and a linear SMPU solution with the solid content being 13-18% is obtained, namely a shape memory polymer leather anti-wrinkling coating material. Leather anti-wrinkling application includes the steps that an SMPU solution is evenly coated on the leather with the clean surface, the leather is placed in an oven at the temperature of 60-90 DEG C to be dried for 10-18 h, the leather is placed at room temperature for 20-28 h, and a leather product coated with the shape memory polymer leather anti-wrinkling coating material is obtained.

Description

technical field [0001] The invention relates to the production of a shape-memory polymer leather anti-wrinkle coating material and the application of leather anti-wrinkle, and belongs to the technical field of leather anti-wrinkle coating material production and leather anti-wrinkle. Background technique [0002] As the last process of tanning, leather finishing requires not only endowing the finished leather with good sensory properties, but also good physical and mechanical properties. Finishing should not only maintain the good body of the crust leather but also ensure good adhesion between the coating and the crust leather. The finishing agent used is a material that can be coated on the leather surface and form a firm attachment. Its main part is a film-forming agent, also known as a base material, which is a substance that makes the finishing agent firmly adhere to the leather surface to form a continuous film. Determines the basic properties of the coating agent. Co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/76C08G18/42C08G18/32C08G18/10C09D175/06C14B1/58C14C11/00
CPCC08G18/10C08G18/4277C08G18/7671C08G2280/00C09D175/06C14B1/58C14C11/003C08G18/3206
Inventor 冷劲松刘彦菊魏洪秋郑晗
Owner HARBIN INST OF TECH
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