WebTrimerization of phenyl isocyanate with triethylamine as catalyst has also been reported and patented. Reactions were carried out at 8000 kg cm −2 and 40 °C for 20 h to give 78% of … WebManagement of cyclo-trimerisation during the polymerisation process is vital when tailoring the mechanical properties of the foam. Proazaphosphatranes are known to efficiently …

The preparation of hybrid trimer by cyclo-oligomerization of

Web15. mar 2024 · In the aliphatic diamine residue-containing imide oligomer, in the formula (1-3), R 1 was a phenyl group, R 2 was a group represented by the formula (9), A was a 4,4′-(4,4′-isopropylidenediphenoxy)diphthalic anhydride residue, and B was a hydrogenated dimer diamine residue or a 1,3-bis(4-aminophenoxy)benzene residue. The imide oligomer ... WebThe structure of the phenyl isocyanate dimer was established by X-ray diffraction16: groups form a three-dimensional network: The central four-member ed ring is planar. The length of the C-N bond corresponds approximately to its length in amides, for example in acetamide (1.426 A),17 and the length of the C—C bond in the aromatic ring differs cvs fm 1960 humble

Trimerization - an overview ScienceDirect Topics

Web专业英语词汇. accordion手风琴activation活化（作用）. addition polymer加成聚合物，加聚物aggravate加重，恶化agitation搅拌agrochemical农药，化肥Alfin catalyst醇（碱金属）烯催化剂align排列成行aliphatic脂肪（族）的alkali metal碱金属allyl烯丙基. pharmaceutical药品，药物，药物的 ... Web1. sep 1992 · A process for producing an isocyanate trimer and a process for producing an urethane with a catalyst for isocyanate ... an unreacted phenyl isocyanate was distilled away under a reduced pressure and the residue was treated in the same manner as that in Example 2 to obtain 42.6 g of triphenyl isocyanurate at a yield of 85.1% as ether-insoluble ... http://www.chemicalland21.com/industrialchem/organic/PHENYLISOCYANATE.htm cheapest phone in pep