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Waterproof moisture permeable modified polyurethane coating glue and preparation thereof

A polyurethane coating, waterproof and moisture-permeable technology, applied in the field of applied chemistry, can solve the problems of inability to effectively solve the moisture permeability and hydrostatic pressure, low moisture permeability of dry-process coatings, and expensive laminated fabrics, etc., to achieve Feasible process, improved aging resistance, good moisture permeability

Inactive Publication Date: 2009-07-15
THE QUARTERMASTER EQUIPMENT RESEARCH INSTITUTE OF THE GENERAL LOGISITIC DEPARTME +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Laminated fabrics are more expensive, and their performance decreases after washing; polyurethane wet-process coatings cannot effectively solve the contradiction between moisture permeability and hydrostatic pressure, and dry-process coatings have very low moisture permeability and are uncomfortable to wear
At the same time, conventional polyurethane coatings have poor aging resistance

Method used

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  • Waterproof moisture permeable modified polyurethane coating glue and preparation thereof
  • Waterproof moisture permeable modified polyurethane coating glue and preparation thereof

Examples

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Comparison scheme
Effect test

Embodiment Construction

[0040] The following examples serve to explain the invention, but do not limit it.

[0041] The coating glue of the present invention is obtained by mixing three components of a coating agent, a crosslinking agent and a crosslinking accelerator.

[0042] 1. Preparation of coating agent

[0043] Coating agent synthesis process: put part of diisocyanate (40-70%, take 48-65% as an example in the example), polyester diol, polyether moisture permeability factor 1 into the synthesis kettle, at a certain temperature ( 70-100°C), primary reaction for a certain period of time (1-4 hours), after detecting that the amount of free isocyanate meets the design requirements (the amount of free isocyanate is set at 30-60%), add part of the solvent (10-40%), Add polyether moisture permeability factor 2, chain extender and modified lignocellulose powder, after the secondary reaction for a certain period of time (1-3 hours), then gradually add the remaining diisocyanate, and gradually add the r...

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Abstract

The invention provides a water-proof and moisture-permeable advanced polyurethane coating adhesive, which is prepared by mixing three components of coating agent, crosslinking agent and crosslinking promoter with a solvent when in use; the coating agent contains 500 to 1000 mesh of lignocellulose micropowder; the amounts of the crosslinking agent and crosslinking promoter are 2-5wt% of that of the coating agent; and the viscosity of the coating adhesive is 8000 to 15000 mPa.s. The advanced polyurethane coating adhesive in the invention is coated on a base fabric so as to prepare a water-proof and moisture-permeable coated fabric; the moisture permeability is greater than 7000 g / m.d; the water pressure resistance is greater than 200 kPa; the aging resistant performance is enhanced; the blocking resistance is obviously improved; and the coated fabric can be used as a coating material of clothes having water-proof and moisture-permeable functions.

Description

technical field [0001] The invention belongs to the field of applied chemistry and relates to a functional glue that can be used in fabric coatings, in particular to a waterproof and moisture-permeable modified polyurethane coating glue and its preparation method and application. Background technique [0002] Generally speaking, clothing textiles are moisture-permeable but not waterproof; most coated fabrics are waterproof and impermeable. Moisture permeability here means that human sweat or moisture can be emitted outward, and waterproof means that external water mist cannot penetrate inward. To make clothing fabrics have both contradictory functions of moisture permeability and waterproof, it really requires skills. When people are outdoors, they often encounter rain and snow. They need waterproof clothing to protect their bodies. Especially for military, police, and outdoor workers, multi-functional clothing with high moisture permeability and high waterproof has an extr...

Claims

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Application Information

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IPC IPC(8): C09D175/04C09D197/02D06N3/14
Inventor 郝新敏张建春严欣宁赵鹏程樊丽君唐丽
Owner THE QUARTERMASTER EQUIPMENT RESEARCH INSTITUTE OF THE GENERAL LOGISITIC DEPARTME
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