Abstract:
Tacky, biodegradable, chemical reaction product formed from • at least one or more aliphatic polyester-polyols having a hydroxyl functionality of between greater than two and less than four each • at least one or more aliphatic polyester-polyols having a hydroxyl functionality of between less than or equal to two and greater than one each • at least one or more each doubly hydroxyl-functionalized chain extenders having a molecular weight of less than or equal to 200 g/mol each, and • at least one or more aliphatic diisocyanates, characterized in that the ratio of the total number of isocyanate groups to the total number of hydroxyl groups in the compounds introduced for the chemical reaction to form the tacky, biodegradable, chemical reaction product is between greater than or equal to 0.4 and less than 1.0, preferably between greater than or equal to 0.6 and less than or equal to 0.9.
Abstract:
Pressure-sensitive adhesive compound comprising a polymer component and a saccharide component, wherein the saccharide component is formed from one or more monosaccharides, disaccharides, oligosaccharides, or polysaccharides, and/or one or more modified saccharide derivatives, which can be derived from monosaccharides, disaccharides, oligosaccharides or polysaccharides by modifying one, several, or all OH groups contained in the respective saccharide
Abstract:
If at least one terpene-phenol resin is used as tackifying resin for pressure-sensitive adhesives based on polar framework polymers, wherein the at least one terpene-phenol resin in gel permeation chromatography analysis shows a multimodal molar mass distribution wherein the low molecular weight peak has its maximum within a range above 260 g/mol, it is possible, even at elevated temperatures, to achieve elevated storage stability of the terpene-phenol resins, apparent from a distinct reduction in increases in softening points over time.
Abstract:
A biodegradable pressure-sensitive adhesive is provided, having good shear strength at relatively high temperatures. This is achieved by chemical crosslinking of a polyurethane prepolymer obtainable by chemical reaction of a) one or more aliphatic polyester polyols A having a hydroxyl functionality of 1.8 up to and including 2 and a number-average molecular weight of greater than/equal to 1000 g/mol; b) one or more compounds B having a hydroxyl functionality of 1.8 up to and including 2 and a molecular weight of less than 1000 g/mol; and c) one or more aliphatic diisocyanates C, where the ratio of the total number of isocyanate groups to the total number of hydroxyl groups in the substances involved in the chemical reaction is greater than/equal to 0.4 and less than 1; and by the formulation of a pressure-sensitive adhesive having one or more polyurethane(s) of this kind as the main constituent.