| 摘要 |
1299591 Stabilizing polyolefins IMPERIAL CHEMICAL INDUSTRIES Ltd 8 Dec 1969 [18 Dec 1968] 60105/68 Heading C3P [Also in Division C2] Polypropylene is stabilized by the addition of amides derived from 3-(3,5-di-t-butyl-4- hydroxyphenyl) propionic acid chloride and ethylene diamine, hexamethylene diamine, N,N<SP>1</SP>-dimethylethylene diamine and piperazine (see Division C2). Reference has been directed by the Comptroller to Specification 1,251,840. |
