Preparation method of wet-method polyurethane resin for high-cotton-feeling microfiber sofa leather

A wet-process polyurethane and sofa leather technology, which is applied in the field of polyurethane resin preparation, can solve the problems of high cost, lower economic benefits, thick creases, etc., and achieve the effect of upgrading grades, high myogenicity, and fine creases

Inactive Publication Date: 2019-04-23
WUXI DOUBLE ELEPHANT MICRO FIBER MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the past, low-modulus polyurethane resins were generally used to achieve this purpose. Because the superfibers in the present invention are opened with toluene, during the process of toluene-opened low-modulus polyurethane resins, the dissolution rate is large and the cells are easy to collapse. , the softness of the prepared microfiber synthetic leather reaches the standard, but it has the disadvantages of slightly poor myogenicity, weak fleshy feeling, and thick creases. At the same time, due to poor myogenicity, its cost is high, which reduces economic benefits

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A preparation method of wet-process polyurethane resin for high-cotton feeling microfiber sofa leather, comprising the following steps:

[0022] (1) Add 150g of solvent DMF, 160g of molten PTMG2000, 30g of PHA2000, 60g of PEDA3000, and 0.3g of BHT into the reactor, stir for 20 minutes, and keep the temperature below 60°C;

[0023] (2) Add 22.4g of MDI to control the temperature at 80°C for 90 minutes;

[0024] (3) Stop heating and add solvent DMF 380g, chain extender EG 17g, phosphoric acid 2 drops and stir for 20 minutes, keep the temperature below 60°C, add MDI 75g in two times, keep the temperature at 80°C, and keep adding an appropriate amount of MDI Increase the viscosity of the system. When the viscosity meets the process requirements, add 320g of solvent DMF, 1g of terminator methanol and silicone oil MY-10, and cool and discharge to obtain the finished polyurethane resin. The viscosity is controlled to 160,000 CPS, and the solid content is 30%, 100%. The modulu...

Embodiment 2

[0026] A preparation method of wet-process polyurethane resin for high-cotton feeling microfiber sofa leather, comprising the following steps:

[0027] (1) Add 150g of DMF, 160g of molten PTMG3000, 50g of PHA2000, 60g of PEDA3000, and 0.3g of BHT into the reactor, stir for 20 minutes, and keep the temperature below 60°C;

[0028] (2) Add 19.8g of MDI to control the temperature at 80°C for 90 minutes;

[0029] (3) Stop heating and add solvent DMF 400g, chain extender EG 19g, phosphoric acid 2 drops and stir for 20 minutes, keep the temperature below 60°C, add MDI 79g in two times, keep the temperature at 80°C, and keep adding an appropriate amount of MDI Increase the viscosity of the system. When the viscosity meets the process requirements, add 300g of solvent DMF, 1g of terminator methanol and silicone oil SY-4169, and cool and discharge to obtain the finished polyurethane resin. The viscosity is controlled to 150,000 CPS, and the solid content is 30%, 100% The modulus is 3....

Embodiment 3

[0031] A preparation method of wet-process polyurethane resin for high-cotton feeling microfiber sofa leather, comprising the following steps:

[0032] (1) Add 150g of DMF, 150g of molten PTMG2000, 50g of PEBA3000, 50g of PEDA3000, and 0.3g of BHT into the reactor, stir for 20 minutes, and keep the temperature below 60°C;

[0033] (2) Then add 18.4g of MDI to control the temperature at 80°C for 60 minutes;

[0034] (3) Stop heating and add solvent DMF 380g, chain extender EG 17g, phosphoric acid 2 drops and stir for 20 minutes, keep the temperature below 60°C, add MDI 75g in two times, keep the temperature at 80°C, and keep adding an appropriate amount of MDI Make the viscosity of the system rise. When the viscosity reaches the process requirements, add 320g of solvent DMF, 1g of terminator methanol and silicone oil MY-310, and cool and discharge to obtain the polyurethane resin of the present invention. The viscosity is controlled to be 180,000 cps / 25°C, and the solid content...

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Abstract

The invention belongs to the technical field of preparation of polyurethane resin, and particularly relates to a preparation method of wet-method polyurethane resin for high-cotton-feeling microfibersofa leather. The preparation method of the invention comprises the following steps: adding solvent, polyether glycol, polyester glycol, heat-resistant oxidant, and chain extender into a reaction kettle, uniformly stirring, adding 4-diisocyanate, heating to 70 to 90 DEG C, reacting for 60 to 120 minutes, adding the solvent and chain extender, continuously supplementing diisocyanate I to improve the viscosity, adding an aid and solvent after the viscosity meets the requirement, and cooling and discharging to obtain the finished product polyurethane resin. By adopting a special resin synthetic process formula and matching a reasonable microfiber production process, the polyurethane resin prepared by the invention has the characteristics of low solution ratio, high myogenic properties, fullness, fine and smooth crease and the like, can enhance the grade of the microfiber sofa leather and can be comparable to calf leather and goat leather.

Description

technical field [0001] The invention belongs to the technical field of polyurethane resin preparation, and in particular relates to a preparation method of wet-process polyurethane resin for high-cotton feel superfiber sofa leather. Background technique [0002] Microfiber sofa leather requires that the prepared leather has softness, strong fleshy feeling, and not too thick creases and other appearance and performance requirements. Therefore, the wet-process polyurethane resin produced and used is required to have the characteristics of softness, fine cells, and good fleshy feel. In the past, low-modulus polyurethane resins were generally used to achieve this purpose. Because the superfibers in the present invention are opened with toluene, during the process of toluene-opened low-modulus polyurethane resins, the dissolution rate is large and the cells are easy to collapse. , the softness of the prepared microfiber synthetic leather reaches the standard, but it has the disad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/42C08G18/48C08G18/76C08G18/32C08K5/13
CPCC08G18/3206C08G18/4018C08G18/4202C08G18/4238C08G18/425C08G18/4854C08G18/7671C08K5/13
Inventor 邬花元尉雷邹杰
Owner WUXI DOUBLE ELEPHANT MICRO FIBER MATERIAL
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