ADHESIVE TAPE FOR PROTECTING SURFACES

摘要

The invention relates to an extensively biologically degradable adhesive tape, which in particular has a good and quickly established anchoring between the adhesive and the carrier. The invention relates to an adhesive tape for protecting surfaces, comprising an adhesive H, containing at least 60 wt %, at least one polyurethane P, obtainable from chemical cross-linking of a polyurethane pre-polymer, obtainable from the chemical reaction of d) one or a plurality of aliphatic polyester polyols A having a hydroxy functionality of 1.8 through 2 and a number-averaged molecular weight of equal to/greater than 1,000 g/mole; e) one or a plurality of compounds B having a hydroxy functionality of 1.8 through 2 and a number-averaged molecular weight of less than 1,000 g/mol; f) one or a plurality of aliphatic diisocyanates C; wherein the ratio of the total number of isocyanate groups to the total number of hydroxy groups of the substances involved in the chemical reaction for building the prepolymer is greater than/equal to 0.4 and less than 1; and a biodegradable carrier.

主权项

1. An adhesive tape for protecting surfaces, comprising
a pressure-sensitive adhesive H comprising at least 60 wt % of at least one polyurethane P obtainable by chemical crosslinking of a polyurethane prepolymer obtainable by chemical reaction of
a) one or more aliphatic polyester polyols A having a hydroxy functionality of from 1.8 up to and including 2 and a number-average molecular weight of greater than or equal to 1000 g/mol;b) one or more compounds B having a hydroxy functionality of from 1.8 up to and including 2 and a number-average molecular weight of less than 1000 g/mol;c) one of more aliphatic diisocyanates C; where the ratio of the total number of isocyanate groups to the total number of hydroxy groups in the compounds participating in the chemical reaction to build the prepolymer is greater than or equal to 0.4 and less than 1; and a biodegradable carrier.