Polyurethane surface layer resin for PVC sole injection molding and preparation method thereof

A technology of surface layer resin and polyurethane, which is applied in the field of polyurethane surface layer resin for PVC shoe sole injection molding and its preparation, can solve the problems of easy separation, many production processes, and insufficient peel strength, and achieve the effect of improving bonding strength and not easy to degumming

Active Publication Date: 2021-01-08
ZHEJIANG HUAFON SYNTHETIC RESIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This traditional production method not only leads to very high production costs due to many production processes, but also pollutes the environment because of the use of a large amount of adhesives, which does not meet the requirements of modern production for environmental protection. It is made of glue, the use time is short, and it is easier to open the glue
In order to solve the defects in the existing technology, modern enterprises have invented a production method of one-time injection molding of the shoe upper and the sole, which has relatively high requirements for the shoe leather surface. If the injection molding effect is not good - the shoe upper, The peeling strength of the sole through heat lamination is not enough, it is extremely easy to separate, which affects the quality of the finished product, and the yield of injection molding is low
Injection-type dry-process surface layer polyurethane resin products are required to be suitable for the preparation of synthetic leather surface layers that are directly attached to the soles of injection molding processes, and to change the defects of using glue in the past, high production costs, and not being environmentally friendly. The key lies in not using glue. Under the condition of mixture, improve the bonding strength between the surface layer made of injection-molded dry-process polyurethane resin products and the sole formed by injection molding process

Method used

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  • Polyurethane surface layer resin for PVC sole injection molding and preparation method thereof
  • Polyurethane surface layer resin for PVC sole injection molding and preparation method thereof
  • Polyurethane surface layer resin for PVC sole injection molding and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Polyurethane surface layer resin The polyurethane surface layer resin consists of the following components in weight percentage:

[0044]

[0045] The preparation of polyurethane surface layer resin is obtained through the following steps:

[0046] Step A: Add polyester polyol 2 and 32.15% solvent into the reaction vessel, stir at 50°C for 30 minutes, add HDI, heat up to 100°C and continue stirring for 100 minutes;

[0047] The isocyanate index of the reactant in the step A is 0.70:1;

[0048] Step B: Add the remaining 37.95% solvent and chain extender and stir for 30 minutes, add 4,4'-MDI, control the temperature at 75°C, control the viscosity of the reactant to 150Pa.s / 25°C, and cool down to obtain polyurethane for injection molding of PVC soles Surface resin;

[0049] The catalyst BICAT 8108 is added in the step A, and the addition amount is 0.01% of the total mass of the resin;

[0050] Add methanol at the later stage of step B, and the added amount is 0.05% o...

Embodiment 2

[0052] The polyurethane surface layer resin is composed of the following components in weight percentage:

[0053]

[0054] The preparation of polyurethane surface layer resin is obtained through the following steps:

[0055] Step A: Add polyester polyol 3 and 32.62% solvent into the reaction vessel, stir at 55°C for 30 minutes, add HDI, heat up to 110°C and continue stirring for 100 minutes;

[0056] The isocyanate index of the reactant in the step A is 0.80:1;

[0057] Step B: Add the remaining 37.73% solvent and chain extender and stir for 30 minutes, add 4,4'-MDI, control the temperature at 70°C, control the viscosity of the reactant to 140Pa.s / 25°C, and cool down to obtain polyurethane for injection molding of PVC soles Surface resin;

[0058]The catalyst BICAT 8108 is added in the step A, and the addition amount is 0.01% of the total mass of the resin;

[0059] Add methanol at the later stage of step B, and the added amount is 0.05% of the total mass of the resin. ...

Embodiment 3

[0061] The polyurethane surface layer resin is composed of the following components in weight percentage:

[0062]

[0063] The preparation of polyurethane surface layer resin is obtained through the following steps:

[0064] Step A: Add polyester polyol 3 and 30.21% solvent into the reaction vessel, stir at 60°C for 20 minutes, add HDI, heat up to 100°C and continue stirring for 120 minutes;

[0065] The isocyanate index of the reactant in the step A is 0.50:1;

[0066] Step B: Add the remaining 36.37% solvent and chain extender and stir for 30 minutes, add 4,4'-MDI, control the temperature at 80°C, control the viscosity of the reactant to 142Pa.s / 25°C, and cool down to obtain polyurethane for injection molding of PVC soles Surface resin;

[0067] The catalyst BICAT 8108 is added in the step A, and the addition amount is 0.01% of the total mass of the resin;

[0068] Add methanol at the later stage of step B, and the added amount is 0.05% of the total mass of the resin....

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Abstract

The invention relates to a polyurethane surface layer resin for PVC sole injection molding and a preparation method thereof. The surface layer resin is composed of the following components in percentage by weight: 5-12% of diisocyanate, 18-25% of polyester polyol, 0.5-1.5% of a chain extender, and the balance of a solvent. The preparation method comprises the following steps of A, adding polyesterpolyol and a solvent accounting for 25-40% of the total weight of the components into a reaction container, stirring at 50-60 DEG C for 20-30 minutes, adding aliphatic diisocyanate, heating to 100-110 DEG C, and continuing to stir to react for 100-120 minutes, and B, adding the residual solvent and chain extender, stirring for 30 minutes, adding aromatic diisocyanate, controlling the temperatureto be 70-80 DEG C, controlling the viscosity of reactants to be 100-160 Pa.s / 25 DEG C, and cooling to obtain the polyurethane surface layer resin for PVC sole injection molding. Under the condition that no adhesive is used, the bonding strength of the surface layer made of the injection molding type dry-method polyurethane resin product and the sole formed through the injection molding process isgreatly improved.

Description

technical field [0001] The invention relates to a polyurethane surface layer resin for injection molding of PVC shoe soles and a preparation method thereof. Background technique [0002] As the main raw material of synthetic leather, polyurethane resin plays a decisive role in the performance of synthetic leather. At present, in traditional shoes, the upper and the sole are formed separately, and then the upper and the sole are bonded together with an adhesive. In order to make the bonding more firm, it may be necessary to sew or further fix it with nails , During this period, it needs to go through many processes, such as: gluing, pressing, sewing and other processes. This traditional production method not only leads to very high production costs due to many production processes, but also pollutes the environment because of the use of a large amount of adhesives, which does not meet the requirements of modern production for environmental protection. It is made of glue, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/73C08G18/72C08G18/66C08G18/42C08G18/32A43B13/04
CPCC08G18/7671C08G18/73C08G18/724C08G18/664C08G18/4607C08G18/3206A43B13/04Y02P70/62
Inventor 杜飘扬张初银吴震林上河王江海木国亭
Owner ZHEJIANG HUAFON SYNTHETIC RESIN
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