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Waterproof moisture permeation polyurethane paint used for textiles and preparation method

A polyurethane coating, waterproof and moisture-permeable technology, applied in textiles, papermaking, fiber treatment, etc., can solve the problem of fabric water pressure, poor wash fastness and abrasion fastness, waterproof and moisture-permeable TPU film with high moisture permeability and durable performance Poor properties and other problems, to achieve the effect of good fastness, excellent hydrophobicity, long bond distance

Inactive Publication Date: 2011-10-12
郯城丰润粮机配件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Waterproof and moisture-permeable TPU film has a high moisture permeability. When it is compounded on textile fabrics, the fabric has poor water pressure, washing fastness, and abrasion fastness. After washing, the water pressure drops greatly, and the durability of various properties is poor.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Raw material weight ratio:

[0044] (A) diphenylmethane diisocyanate 95, (B) toluene diisocyanate 106, (C) tetrahydrofuran-ethylene oxide copolymerized glycol 400, (D) linear bishydroxyalkyl siloxane 100, (E) Ethylene glycol-sebacic acid copolymerized glycol 500, (F) trimethylolpropane 5, (G) methyl propylene glycol 5, (H) methyl ethyl ketone oxime 15, (J) dibutyltin dilaurate 0.5, ( K) toluene 1000, butanone 510;

[0045] Preparation:

[0046] (1) Prepolymerization reaction: 50% by weight of diphenylmethane diisocyanate (A), toluene diisocyanate (B), tetrahydrofuran-ethylene oxide copolymerized glycol (C), linear dihydroxyalkyl siloxane Add alkane (D), ethylene glycol-sebacic acid copolyethylene glycol (E), dibutyltin dilaurate (J), and 80% of the weight of solvent (K) into the reactor, and heat up to 85±2°C for 13 Hour;

[0047] (2) Chain extension reaction: Add trimethylolpropane (F) and methylpropylene glycol (G) to the above prepolymer and react at 70-80°C for ...

Embodiment 2

[0051] Raw material weight ratio: (A) diphenylmethane diisocyanate 80, (B) toluene diisocyanate 150, (C) polytetrahydrofuran-ethylene oxide-propylene oxide copolyethylene glycol 500, (D) linear dihydroxy Alkyl siloxane 100, (E) ethylene glycol-trimethylolpropane-adipic acid copolymerized glycol 800, (F) trimethylolpropane 5, (G) methylpropanediol 5, (H) p-Chlorophenol 20, (J) dibutyltin dilaurate 0.6, (K) toluene 1750, ethyl acetate 1000: the preparation method is the same as in Example 1, and the solid content of the product is 40.6%.

[0052] The product of this embodiment has improved self-crosslinking property, good fastness and high water pressure due to the large amount of ethylene glycol-trimethylolpropane-adipic acid copolymerized glycol in the raw material ratio.

Embodiment 3

[0054]Raw material weight ratio: (A) diphenylmethane diisocyanate 50, (B) toluene diisocyanate 200, (C) polytetrahydrofuran-ethylene oxide-propylene oxide copolyethylene glycol 400, (D) linear dihydroxy Alkylsiloxane 150, (E) Ethylene Glycol-Trimethylolpropane-Adipic Acid Copolyglycol 600, (F) Trimethylolpropane 6, (G) 1,4-Cyclohexanediol 5. (H) Phenol 18, (J) Dibutyltin Dilaurate 0.5, (K) Butanone 550, N,N-Dimethylformamide 1500: The preparation method is the same as in Example 1, and the solid content of the product is 40.5%.

[0055] The product of this example is due to the polytetrahydrofuran-ethylene oxide-propylene oxide copolymerized glycol, linear bishydroxyalkylsiloxane and ethylene glycol-trimethylolpropane-adipic acid copolymerized in the ratio of raw material components The proportion of glycol used is the best, cold resistance, good moisture permeability, and high water pressure.

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PUM

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Abstract

The invention relates to waterproof moisture permeation polyurethane paint used for textiles and a preparation method. The waterproof moisture permeation polyurethane paint is prepared from methyl diphenylene diisocyanate, toluene di-isocyanate, polyether glycol (with the molecular weight of 2000), linear dihydroxylated alkylsiloxane (with the molecular weight of 1000), polyester dihydric alcohol(with the molecular weight of 2000), trimethylolpropane, chain extending agents, sealing compounds, dibutyl tin laurate and solvents through the processes of pre-polymerization reaction, chain extension reaction and sealing reaction. The production process is simple, and the products have the advantages of self-crosslinking effect, soft hand feeling, good cold resistance performance, high moisture permeation performance, high water pressure resistance and little reduction after water pressure resistance washing.

Description

technical field [0001] The invention relates to a polyurethane for waterproof and moisture-permeable textiles and a preparation method thereof, in particular to a functional polyurethane coating with excellent properties such as self-crosslinking fastness, moisture permeability, waterproof and cold resistance, and a preparation method thereof. Background technique [0002] Waterproof and moisture-permeable coatings for textiles currently on the market include solvent-based polyurethane, waterproof and moisture-permeable TPU film and a small amount of water-based polyurethane. Solvent-based waterproof and moisture-permeable polyurethane coatings are composed of primer and surface glue, and the primer needs to be added with cross-linking agent and cross-linking accelerator during use, and the storage time is short after adding, so it needs to be used up as soon as possible, which is inconvenient to use. In the prior art, although the fabric has good water resistance after bein...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M15/653C08G18/76C08G18/32C08G18/48C08G18/42
Inventor 严欣宁杨青樊丽君唐丽陶忠华刘杰谭翔宇
Owner 郯城丰润粮机配件有限公司
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