| 摘要 |
<p>Container is composed of a polyolefin pref. polyethylene and polyester pref. PET, layer closely bound together by a thin film of a polyurethane. Pref. polyurethane is the reacn. product of triphenylmethane triisocyanate and (i) adipic acid/diethylene glycol reacn. product or (ii) adipic and phthalic acids/butylene glycol and triol. The containers, proof against the solvents, are cheap and much lighter than conventional metal or glass containers.</p> |
