Heat curable adhesives based on polymers having a polybutadiene chain backbone and containing hydroxyl groups
AssigneeHenkel Kommanditgesellschaft auf Aktien
InventorsRichard Hemel, Julius Herold, Hans-Juergen Buecken, Peter Hofmann
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Abstract
Heat curable adhesives, based on polybutadiene containing hydroxyl groups, which have a content of (a) polybutadiene having a number average molecular weight of from about 1000 to 3500 and OH values in the range from about 20 to 100; (b) blocked multi-isocyanates, (c) sulfur and (d) conventional vulcanization accelerators, an which may also contain conventional, especially mineral, fillers, pigments and/or auxiliaries, show good elasticity behavior and high tensile shear strength after curing and have a relatively low viscosity favorable for processing before curing.
Claims20
A heat curable adhesive, comprising:
- a) polybutadiene chain backbone polymer having a number average molecular weight of from about 1000 to about 3500 and an OH value in the range from about 20 to about 100;
- b) blocked multi-siocyanate molecules;
- c) sulfur;- and
- d) a vulcanization accelerator.
Dependencies are inferred from the claim text.