Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
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active
Polyisocyanate compositions containing reversibly blocked cataly
Process for the preparation of modified polyisocyanates
Process for the production of moldings or films of cross-linked
Process for the production of optionally cellular polyurethanes
Process for the production of optionally foamed polyurethanes wh
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