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Method for preparing polyurethane resin for high-wearing-resistance working gloves

A technology of polyurethane resin and labor protection gloves, applied in the field of synthetic leather, can solve problems such as limiting the application scope and application effect of polyurethane resin

Inactive Publication Date: 2017-05-31
JIAXING HEXIN CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the polyurethane labor protection gloves on the market, especially the gloves whose glove core is made of polyester, generally have wear resistance below level 4 (8000 times), which limits the application range and application effect of polyurethane resin for labor insurance gloves to a certain extent.

Method used

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  • Method for preparing polyurethane resin for high-wearing-resistance working gloves
  • Method for preparing polyurethane resin for high-wearing-resistance working gloves
  • Method for preparing polyurethane resin for high-wearing-resistance working gloves

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Effect test

preparation example Construction

[0011] The preparation method of the polyurethane resin for this high wear-resistant labor protection gloves comprises the following steps:

[0012] (1) polyglycol and isocyanate are carried out prepolymerization according to the ratio of the molar number of isocyanate and polyglycol in the ratio of (0.5~2.0): 1 in solvent dimethylformamide;

[0013] (II) Add auxiliary agent and glycol chain extender, continue heating to make prepolymer react with glycol chain extender;

[0014] (Ⅲ) adding isocyanate to continue the reaction, during the reaction, gradually add solvent and auxiliary agent in the system;

[0015] (Ⅳ) Detect the viscosity of the resin, when it reaches 2.2×10 5 ~2.6×10 5 At mPa·s / 25°C, add a small molecule monohydric alcohol to terminate the reaction, add additives and a small amount of solvent and stir well;

[0016] Wherein the sum of the moles of the polyglycol in the first step plus the moles of the diol chain extender in the second step is equal to the tot...

Embodiment 1

[0024] (a) Raw material ratio

[0025]

[0026] (b) Preparation process

[0027] (1) Add dihydric alcohol HP-EA2000, antioxidant, and DMF 100g into the reaction bottle, heat to 50°C and stir for 30 minutes; put in 37.5g of MDI, heat to 75°C for 2 hours to react.

[0028] (2) Add 200g of DMF and 12g of ethylene glycol, and react at a controlled temperature of 45°C for 30 minutes; add the remaining isocyanate in 2 times, and react at a controlled temperature of 75°C, each reaction time is 40 minutes, and 0.01g of catalyst is added in the middle to speed up the reaction. During the reaction process, add the remaining DMF as the viscosity increases, and then check the viscosity until the viscosity reaches 2.2×10 5 mPa·s / 25°C.

[0029] (3) 0.20 g of methanol was added to react for 150 min, and the material was unloaded to obtain 764 g of polyurethane resin with a solid content of 30%.

Embodiment 2

[0031] (a) Raw material ratio

[0032]

[0033] (b) Preparation process

[0034] (1) Add diol HP-BA3000, antioxidant, and DMF 90g into the reaction bottle, heat to 50°C and stir for 30 minutes; put in 22.5g of MDI, heat to 75°C for 2 hours to react.

[0035] (2) Add 250g of DMF, 12g of ethylene glycol, and react at a controlled temperature of 45°C for 30 minutes; add the remaining isocyanate in 2 times, and react at a controlled temperature of 75°C, each reaction time is 40 minutes, adding 0.01g of catalyst in the middle to speed up the reaction. During the reaction process, add the remaining DMF as the viscosity increases, and then check the viscosity until the viscosity reaches 2.2×10 5 mPa·s / 25°C.

[0036] (3) 0.20 g of methanol was added to react for 150 min, and the material was unloaded to obtain 743 g of polyurethane resin with a solid content of 30%.

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Abstract

The invention discloses a method for preparing polyurethane resin for high-wearing-resistance working gloves. The method comprises the following steps: (I) performing a pre-polymerization reaction on poly dihydric alcohol and isocyanate at a mole ratio of (0.5-2.0):1; (II) adding an additive and a dihydric alcohol chain extender, and continuously heating to enable a prepolymer to react with the dihydric alcohol chain extender; (III) adding the isocyanate to perform a reaction continuously, and in the reaction process, gradually adding a solvent and an additive in the system; and (IV) when meeting preset viscosity, adding micromolecule monohydric alcohol to terminate the reaction, adding an additive and a small amount of solvent, and sufficiently and uniformly stirring. As the poly dihydric alcohol is added to react with a part of isocyanate firstly, and the prepolymer which is ended by isocyanate groups is generated, soft sections and hard sections of the polyurethane resin can be sequentially arranged, the curing speed and the pore sizes of the resin can be controlled, the permeation degree of the resin in a glove core can be controlled, and thus the purposes that a glove is high in wearing resistance and easy to separate from a mold can be achieved.

Description

technical field [0001] The invention relates to a preparation method of polyurethane resin for high wear-resistant labor protection gloves, which belongs to the field of synthetic leather. Background technique [0002] The polyurethane labor protection gloves currently on the market are mainly made by impregnating solvent-based polyurethane with the glove core as the base material. This kind of gloves has the advantages of thin dipping layer, comfortable wearing, good oil resistance, wear resistance and low cost, so it is widely used in industrial and agricultural production, construction, medical and other fields, and is a must In recent years, hand protective products have become an important product in safety gloves in the international market, and sales have continued to rise. With the improvement of people's living standards, people are gradually pursuing high-quality labor insurance products. At present, the polyurethane labor protection gloves on the market, especia...

Claims

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Application Information

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IPC IPC(8): C08G18/76C08G18/66C08G18/42C08G18/48C08G18/32C08G18/30C08G18/10C08G18/12
CPCC08G18/7671C08G18/10C08G18/12C08G18/4018C08G18/4202C08G18/4238C08G18/4854C08G18/3206C08G18/282
Inventor 张雪刚石磊沈连根徐欣欣李寿伟沈雁宾吕惠玲
Owner JIAXING HEXIN CHEM IND
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