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Non-yellowing alkali weight reduction wet-process dyed polyurethane resin for superfine fiber synthetic leather and preparation method thereof

A polyurethane resin and ultra-fine fiber technology, applied in textiles and papermaking, can solve the problems of poor dyeability, lower product grades, and easy yellowing of synthetic leather, achieving good yellowing resistance, solving hard hand feel, acid and alkali resistance. And the effect of excellent heat resistance

Active Publication Date: 2011-12-14
ZHEJIANG HUAFON SYNTHETIC RESIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current domestic production technology has not achieved the desired effect. After the alkali reduction, the base fabric is easy to lose elasticity, the dyeability is poor, and the synthetic leather produced feels hard, which greatly reduces the product grade.
When applied to white and light-colored products, synthetic leather is prone to yellowing due to the influence of the environment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Raw material name Weight (unit: kg)

[0015] Polytetramethylene ether glycol (molecular weight 2000) 108.0

[0016] Polytetramethylene ether glycol (molecular weight 1000) 72.0

[0017] Polycaprolactone (molecular weight 2000) 20.0

[0018] Ethylene glycol (EG) 10.5

[0019] Isophoronediamine (IPDA) 23.1

[0020] N-Methyldiethanolamine (MDEA) 4.1

[0021] Isophorone diisocyanate (IPDI) 105.7

[0022] Antioxidant 245 1.6

[0023] N,N-Dimethylformamide (DMF) 801.3

[0024] The preparation steps are as follows:

[0025] (1) Add the above-mentioned polytetramethylene ether glycol 180KG, polycaprolactone 20KG, antioxidant 1.6KG, DMF29.8KG and IPDI66.4KG to the reaction kettle in sequence, and the reaction temperature is controlled at 90-110°C. Add an appropriate amount of catalyst to react for 1 to 3 hours until the NCO content is 4.61%.

[0026] (2) Add EG10.5KG and MDEA4.1KG together with 50.3KGDMF into the reactor, then put in the remaining IPDI and react at 90-1...

Embodiment 2

[0029] Raw material name Weight (unit: kg)

[0030] Polytetramethylene ether glycol (molecular weight 2000) 140.0

[0031] Polytetrahydrofuran-propylene oxide copolyether glycol (molecular weight 1800) 30.0

[0032] Polycaprolactone (molecular weight 2000) 30.0

[0033] EG 7.9

[0034] IPDA 17.2

[0035] MDEA 3.0

[0036] IPDI 79.0

[0037] Antioxidant 245 1.4

[0038] DMF 716.6

[0039] The preparation steps are as follows:

[0040] (1) Add the above polytetramethylene ether glycol 140KG, polytetrahydrofuran-oxypropylene copolyether glycol 30KG, polycaprolactone 30KG, antioxidant 1.4KG, DMF27.8KG and IPDI49. 6KG, the reaction temperature is controlled at 90-110°C, and an appropriate amount of catalyst is added to react for 1-3 hours until the NCO content is 3.67%.

[0041](2) Add EG7.9KG and MDEA3.0KG together with 45.0KGDMF into the reactor, then put in the remaining IPDI and react at 90-110°C for 1-3 hours, measure the NCO content until the content is 2.34%.

[00...

Embodiment 3

[0044] Raw material name Weight (unit: kg)

[0045] Polytetramethylene ether glycol (molecular weight 2000) 170.0

[0046] Polycaprolactone (molecular weight 2000) 30.0

[0047] 1,4-Butanediol (1,4-BG) 13.5

[0048] IPDA 20.4

[0049] MDEA 3.6

[0050] IPDI88.8

[0051] Antioxidant 245 1.5

[0052] DMF 761.4

[0053] The preparation steps are as follows:

[0054] (1) Add 170KG of polytetramethylene ether glycol, 30KG of polycaprolactone, 1.5KG of antioxidant, 27.8KG of DMF and 48.8KG of IPDI to the reaction kettle in sequence, and control the reaction temperature at 90-110°C. Add an appropriate amount of catalyst to react for 1 to 3 hours until the NCO content is 3.63%.

[0055] (2) Add 1,4-BG13.5KG and MDEA3.6KG together with 49.1KGDMF into the reactor, then put in the remaining IPDI and react at 90-110°C for 1-3 hours, measure the NCO content until the content is 2.62%.

[0056] (3) Lower the temperature of the reactor to 30-50°C, slowly add IPDA dropwise, add solve...

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PUM

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Abstract

The invention belongs to a polyurethane elastomer material and a preparation method thereof and in particular relates to non-yellowing alkali deweighting wet method dyeing polyurethane resin for superfine fiber synthetic leather and a preparation method thereof. The invention adopts the following technical scheme that: the non-yellowing alkali deweighting wet method dyeing polyurethane resin for the superfine fiber synthetic leather is characterized by mainly comprising the following components based on the total mass of the polyurethane resin: 16 to 20 percent of macromolecular dihydric alcohol compound, 2.5 to 4 percent of chain extender, 7.5 to 10.5 percent of diisocyanate and 68 to 72 percent of solvent, wherein the chain extender consists of dihydric alcohol, diamine and an alcohol amine compound. According to the above scheme, the invention provides the non-yellowing alkali deweighting wet method dyeing polyurethane resin for the superfine fiber synthetic leather and the preparation method thereof so as to solve the problems at present.

Description

technical field [0001] The invention belongs to a polyurethane elastomer material and a preparation method thereof, in particular to a non-yellowing alkali weight reduction wet-process dyed polyurethane resin for superfine fiber synthetic leather and a preparation method thereof. Background technique [0002] Polyurethane microfiber synthetic leather is a high-grade imitation leather product, which takes the structure and performance of natural leather as the research and imitation goal. Using nylon and polyester superfine fibers similar to the structure and properties of bundled collagen fibers in natural leather, it is made into a high-density non-woven fabric (also known as a substrate) with a three-dimensional network structure, which has excellent refilling performance and has an open microfiber. Polyurethane resin with a porous structure is made through a special weight reduction process and post-processing. The ultra-fiber synthetic leather prepared by the alkali red...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/42C08G18/32C08G18/12D06N3/14
Inventor 郑绍军薛敬钦袁水华
Owner ZHEJIANG HUAFON SYNTHETIC RESIN
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