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Preparation method of solvent-based dyeable wet polyurethane resin

A wet-process polyurethane and polyurethane resin technology, which is applied in textiles and papermaking, can solve the problems of rare dye molecules, insufficient color of superfiber synthetic leather, and low color fastness, so as to reduce production costs, obvious price advantages and application advantage effect

Inactive Publication Date: 2012-10-24
FUJIAN TOPSUN MICROFIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After many times of washing, the dye molecules still stay in the pores of polyurethane and the surface of polyurethane in large quantities, and it is difficult for the dye to enter the polyurethane resin, resulting in very few dye molecules in the polyurethane molecules, and the fiber color of microfiber leather after dyeing is dark. , the color of polyurethane is light, the color difference between polyurethane and fiber is too large, resulting in color flowers, low color fastness and other disadvantages
The color of the dyed microfiber synthetic leather is not bright enough, the color fastness is low, the dye consumption is large, the dyeing process control is relatively complicated, and dyeing defects are prone to occur.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Concrete proportioning and technological condition are as table 1,

[0023] serial number material name Dosage / g Process requirements （1） DMF 200 （2） PTMG2000 195 (1)~(2) After adding, heat up and stir to dissolve the PTMG, and stir for 30 minutes after the dissolution is complete （3） MDI 12.2 After adding (3), slowly raise the temperature to 70°C for 60 minutes （4） DMF 200 Add (4) to dilute （5） EG 15 （6） MEAs 4 (5) (6) add together, and stir for 30 minutes, then add MDI （7） MDI 85 join in batches （8） MDI Appropriate amount Add in batches to increase the viscosity to reach the process viscosity （9） DMF 330 （10） Capping agent Appropriate amount Add (9) and (10) to terminate the reaction, the viscosity is 160Pa·s, and the solid content is 30±1%

Embodiment 2

[0025] serial number material name Dosage / g Process requirements （1） DMF 200 （2） PTMG2000 100 （3） PTMG3000 95 (1)~(3) After adding, heat up and stir to make the PTMG dissolve evenly. After the dissolution is complete, stir for 30 minutes （4） MDI 12.2 After adding (4), slowly raise the temperature to 80°C for 60 minutes （5） DMF 200 After the reaction time is up, add (5) to dilute （6） EG 19 Add (6) at one time, and raise the temperature to 80°C for 30 minutes （7） MDI 85 Add in batches, react at 80°C for 60min after each batch of addition （8） MDI Appropriate amount Add in batches to increase the viscosity to reach the process viscosity （9） DMF 330 （10） MEA capped Appropriate amount Add (10) to terminate the reaction, the viscosity is 160Pa·s, and the solid content is 30±1%

Embodiment 3

[0027] serial number material name Dosage / g Process requirements （1） DMF 200 （2） PTMG2000 100 （3） PCL2000 95 (1)~(3) After adding, heat up and stir to make the PTMG dissolve evenly. After the dissolution is complete, stir for 30 minutes （4） MDI 12.2 After adding (4), slowly raise the temperature to 70°C for 60 minutes （5） DMF 200 After the reaction time is up, add (5) to dilute （6） EG 15 （7） EA 4 (6) (7) add together, and stir for 30 minutes, then add MDI （8） MDI 85 join in batches （9） MDI Appropriate amount Add in batches to increase the viscosity to reach the process viscosity （10） DMF 330 (11) Methanol Appropriate amount Add (10) and (11) to terminate the reaction, the viscosity is 160Pa·s, and the solid content is 30±1%

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Abstract

The invention provides a preparation method of a solvent-based dyeable wet polyurethane resin, comprising the following steps: introducing a group into polyurethane molecules to let the reacted polyurethane contain the group; and then establishing chemical bond between the polyurethane resin and dye molecules. The invention mainly aims at the problem that difficulty in coloring polyurethane and low color fastness after coloring in the existing dyeing process of non-figured islands-in-sea microfiber synthetic leather. The invention discloses a synthesis and preparation method of the polyurethane resin with good dyeing performance and obviously improved dyeing color fastness. According to the invention, after dyeing the non-figured islands-in-sea microfiber synthetic leather prepared by using the resin, the color fastness is raised 0.5-1.5 grade as against that of conventional polyurethane, the color is bright, the dyeing uniformity is raised, the dye application amount is reduced, the dyeing technology is simplified, and the invention has high application value and economic value.

Description

Technical field [0001] The invention involves a molecular design and preparation method of a polyurethane resin, especially the molecular design and preparation method of the hyperfibly high -performance dyeing wet polyurethane resin. Background technique [0002] Most of the current solvent -based ultra -fiber -lempered polyurethane resin uses methanol seal to stop the reaction of a liquid polyurethane resin. The main raw materials are: medium and high molecular weight polyol -its molecular weight (the number of molecular quantities referred to by the present invention is the number of molecular weights.Molecular quantity) is 500 ~ 5000, and the more preferably optional molecular weight is 1000 ~ 3000, 4,4-diopylene methane diisocyanate (MDI), ethylene glycol, solvents are di metamimam (DMF), antioxidants, seal sealing agents, seal sealingEnd agents (methanol), preservatives, penetration agents, emulsifiers, etc. [0003] The wet polyurethane contains non -woven fabrics for the ...

Claims

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Application Information

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IPC IPC(8): C08G18/76C08G18/66C08G18/48C08G18/44C08G18/42D06N3/14
Inventor 邬花元丁惠阳刘文辉冉斌
Owner FUJIAN TOPSUN MICROFIBER
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