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Polyurethane dispersion for forming gas barrier layer, polyurethane laminate, and method for producing polyurethane dispersion for forming gas barrier layer
Polyurethane dispersion for forming gas barrier layer, polyurethane laminate, and method for producing polyurethane dispersion for forming gas barrier layer
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机译:用于形成阻气层的聚氨酯分散体,聚氨酯层压体以及用于形成阻气层的聚氨酯分散体的制备方法
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摘要
A polyurethane dispersion is a polyurethane dispersion in which polyurethane resin produced by reaction of an isocyanate group-terminated prepolymer with a chain extender is dispersed in water. The isocyanate group-terminated prepolymer is produced by at least allowing a polyisocyanate component containing xylylene diisocyanate and/or hydrogenated xylylene diisocyanate to react with a polyol component containing diol having 2 to 6 carbon atoms, a low-molecular-weight polyol having a functionality of three or more, and an active hydrogen group-containing compound containing a hydrophilic group. The chain extender contains an alkoxysilyl compound having a primary amino group, or a primary amino group and a secondary amino group, and the molar ratio of the hydroxyl group in the low-molecular-weight polyol having a functionality of three or more is less than 25% relative to a total mol 100% of the hydroxyl group in the polyol component.
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