Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From reactant having at least one -n=c=x group as well as...
Inventor
active
Aromatic polyamide from piperazine, p-phenylene diamine and tere
Aromatic polyamides from N,N'-bis(p-aminobenzoyl)ethylene diamin
Polymeric antioxidant and process for production thereof
Process for production of polyester polyurethane elastomeric fib
Thermosetting polyurethane-urea elastic yarn and process thereof
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