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Drying agent for polyurethane synthetic leather and preparation method thereof

A technology of water repellent and synthetic leather, which is applied in textiles, papermaking, fiber treatment, etc.

Active Publication Date: 2011-02-23
SHANGHAI HUIDE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a water-repellent agent for polyurethane synthetic leather and its preparation method, so as to solve many shortcomings of existing water-repellent agents

Method used

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  • Drying agent for polyurethane synthetic leather and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0086] Put 270g of 1,4-butanediol (3 moles) and 1442g of N,N-dimethylformamide into a 3L four-necked flask, stir, and add 348g of toluene in batches at an internal temperature of 50-70°C Isocyanate (TDI) (2 moles), the end point of the reaction is determined by infrared spectrometer detection without NCO group characteristic peak.

preparation example 2

[0088] 276g of glycerol (3 moles) and 1456g of N,N-dimethylformamide were dropped into a 3L four-necked flask, stirred, and 348g of toluene diisocyanate (TDI) (2 mol), and the end point of the reaction is determined by infrared spectrometer detection without NCO group characteristic peak.

preparation example 3

[0090] Add 46.4g perfluorooctyl ethanol (0.1 mole) and 250g diphenylmethane diisocyanate (MDI) (1 mole) into a 2L four-necked flask, stir the reaction until the NCO weight % reaches the theoretical value of 26.9%, slowly add 135g Triethylene glycol was reacted until the NCO weight % reached a theoretical value of 0.97%, and 103 g of the product in Preparation Example 1 was added dropwise, and the end point of the reaction was determined by infrared spectrometer detection without NCO group characteristic peaks. After the reaction was terminated, 390.2 g of butanone and 1.85 g of polyether-modified silicone additives were added, and stirred evenly to obtain water-repellent agent 1 for polyurethane synthetic leather.

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PUM

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Abstract

The invention provides a drying agent for polyurethane synthetic leather and a preparation method thereof. The drying agent has excellent drying performance, and the hydrolysis resistance of the products is effectively improved by adding the drying agent into the polyurethane synthetic leather. The drying agent is solution of fluorine-containing polyurethane resin, and the weight percentage concentration of the solution is 19.94 to 80 percent. The drying agent comprises the components of an effective solid matter A, a solvent B and an aid C, wherein A is fluorine-modified polyurethane resin and can be expressed by a general formula, namely PFm(PULink)nXk, wherein PF is a chain segment generated by reacting fluorine-containing alcohol with 2 to 18 carbon atoms with an isocyanate group; the PULink is a polyurethane molecule chain segment generated by reacting a polyol compound with diisocyanate and comprises 8 to 16 repetitive units of carbamate; X is a chain or cyclic group and has 2 to 20 carbon atoms; m is an integer from 2 to 8; n is an integer from 1 to 8; k is a number from 1 to 3; m and n can be equal or unequal; and the aid C is modified organosilicon and an addition amount of the aid C is 0.06 to 1.2 percent.

Description

technical field [0001] The invention relates to a water-repellent agent for polyurethane synthetic leather and a preparation method thereof. The water-repellent agent of the present invention is added in a small amount to polyurethane synthetic leather, which can have a certain water-repellent (and water-repellent, the same below) effect, and prevent water molecules from attacking easily hydrolyzed groups such as (ester groups) in the polymer chain. , thereby improving the hydrolysis resistance of polyurethane synthetic leather products. Background technique [0002] Polyurethane synthetic leather has many advantages such as wear resistance, cold resistance, aging resistance, soft texture and beautiful appearance. It is an ideal substitute for natural leather and is widely used in clothing, shoemaking, luggage and furniture industries. However, because ordinary polyurethane resin contains a large number of easily hydrolyzed groups (such as ester groups), it is easy to hydro...

Claims

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Application Information

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IPC IPC(8): D06N3/14C08G18/38D06M15/576
Inventor 钱建中钱洪祥蔡华兵邹佳娜英岩岩徐亮徐开陈芳
Owner SHANGHAI HUIDE TECH CO LTD
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