Polyurethane sandwich structure element and process for...

Details Polyurethane sandwich structure element and process for... Polyurethane sandwich structure element and process for...

B - Operations, Transporting

32

B

B32B 5/20 (2006.01) B29C 44/24 (2006.01)

Patent

CA 2169800

For the production of sandwich structure elements comprising non- cellular polyurethane layers and polyurethane foamed layers which are produced on a substrate by the application of layers to a substrate, it is proposed that at least the non-cellular polyurethane layers contain 15 to 55 % by weight of mica. Sandwich structure elements are obtained which are particularly dimensionally accurate and which adhere well. The effect is believed to be based on a non-homogeneous curing reaction of the mixture which reacts to form polyurethane, due to the presence of mica.

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