B - Operations – Transporting – 32 – B
Patent
B - Operations, Transporting
32
B
18/641
B32B 5/18 (2006.01) B29D 99/00 (2010.01) B29C 44/04 (2006.01)
Patent
CA 1281866
A PROCESS FOR THE PRODUCTION OF MOLDINGS OF DIFFERENT ELASTICITY OR HARDNESS FROM AT LEAST TWO LIQUID, FOAM-FORMING REACTION MIXTURES ABSTRACT OF THE DISCLOSURE The present invention is directed to a process for the production of a molding from at least two different liquid foam-forming reaction mixtures comprising: (i) introducing a first foam-forming reaction mixture into a mold, (ii) introducing a second foam-forming reaction mixture onto and/or next to the layer formed by said first reaction mixture, the introduction of said second mixture being such that said second mixture is so advanced in its expansion that by the time it contacts said first mixture, said second mixture already has a lower density than said first mixture, (iii) allowing said reaction mixture to react to form a molding having zones of different elasticity or hardeness, and (iv) removing said molding from said mold.
550866
Busch Ralf
Rasshofer Werner
Schoberth Winfried
Aktiengesellschaft Bayer
Busch Ralf
Rasshofer Werner
Schoberth Winfried
Swabey Ogilvy Renault
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