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Articles comprising aqueous dispersions using poly(urea/urethanes)

A polyurethane and system technology, applied in layered products, synthetic resin layered products, chemical instruments and methods, etc., can solve problems such as hindering the long-term use of gloves and weak polyurethane gloves.

Inactive Publication Date: 2007-12-19
INVISTA TECHNOLOG IES S A R L
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polyurethane elastomers can provide an alternative material, but some polyurethane gloves become weak when exposed to water or rubbing alcohol
This will hinder the long-term use of such gloves

Method used

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  • Articles comprising aqueous dispersions using poly(urea/urethanes)
  • Articles comprising aqueous dispersions using poly(urea/urethanes)
  • Articles comprising aqueous dispersions using poly(urea/urethanes)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0091] 156.4 g (0.624 mol) of MDI was mixed with 391 g (0.391 mol) of PTMEG-1000 diol and 19.9 g (0.149 mol) of DMPA (3.5% of the total weight) in a three-necked round bottom flask in a dry box, and then the The flask was moved into a fume hood with an overhead stirrer installed. The mixture was stirred at 90°C under nitrogen atmosphere for 4 hours. Titration of this mixture showed an NCO content of 5.32%.

[0092] 200 ml MEK was added to the mixture and a solution with a solids content of 74% in MEK was obtained. The diol / MEK solution was then slowly added to 4 liters of a 2% SDBS solution containing 15 g TEA at 0° C. through a caulking tube. The ratio of TEA to DMPA was 1:1. The dispersion was prepared using a Ross mixer and a small amount of precipitation was observed. After filtering off the precipitate, a final dispersion with a solids content of 11.5% was obtained. The particle size of the precipitate was determined by Coulter N4MDAnalyzer to be 1063 nm. The molecu...

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Abstract

Stable aqueous poly(urea / urethane) polymers and dispersions are made that do not require the inclusion of chain extenders, curing agents or crosslinking agents. The disclosed poly(urea / urethane) dispersions can be used to make articles such as films and gloves with reduced chance of chemical and biological allergic reaction to skin, and which exhibit improved puncture and tear resistance when compared to such articles made with other materials.

Description

[0001] This application claims the benefit of U.S. Provisional Application 60 / 423,617, filed November 4, 2002, and U.S. Provisional Application 60 / 448,971, filed February 20, 2003, both of which are incorporated by reference in their entirety as part of this disclosure for all the goal of. field of invention [0002] The present invention relates to polyurethanes which do not contain residues of chain extenders, curing agents or crosslinkers and to aqueous dispersions prepared therefrom. Polyurethane particles dispersed in water can be used to prepare various articles, such as films and gloves, which have a reduced chance of inducing chemical and physiological allergic skin reactions and exhibit improved puncture resistance compared to articles made of other materials Wear and tear resistance. Background of the invention [0003] The production of elastic materials is known in the art, for example from the Kirk-Othmer Encyclopedia of Chemical Technology (Kirk-Othmer Encyclo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/76B32B27/40
Inventor Y·H·金M·奥内尔J·陈P·D·亚博罗
Owner INVISTA TECHNOLOG IES S A R L