Polyurethane adhesive mixtures
AssigneeBASF SE
InventorsUwe Bueltjer, Rainer Hummerich, Michael Kerber
Life of this patent
Estimating the term…
Abstract
Polyurethane adhesive mixtures or polyurethane adhesive solutions contain (a) a polyurethane elastomer which advantageously has a mean molecular weight of not less than 30,000 and which is prepared by reacting (i) one or more essentially linear polyesterpolyols and (ii) one or more chain extenders with (iii) a mixture of 4,4'- and 2,4'-diphenylmethane diisocyanate isomers in a weight ratio of from 60:40 to 40:60 and (b) if appropriate, additives and/or organic solvents.
Claims10
A polyurethane adhesive mixture comprising a polyurethane elastomer prepared by reacting at least one essentially linear polyester-polyols and at least one chain extender with a mixture of 4,4'- and 2,4'-diphenylmethane diisocyanate isomers in a weight ratio of from 60:40 to 40:60.
Dependencies are inferred from the claim text.