Clathrate formation in the tetraisoamylammonium propionate-water system
摘要:
In this paper we examine clathrate formation in the tetraisoamylammonium propionate-water binary system. We have found formation of four polyhydrates, two of which are metastable over the whole temperature range studied. All polyhydrate crystals were isolated and their compositions and densities determined; for (i-C5H11)(4)NC2H5COO.36.5H(2)O, unit cell parameters were additionally found. The results are compared with data for tetra-n-butylammonium carboxylate polyhydrates, and the structure of the title compounds is suggested it is confirmed that the isoamyl radical stabilizes the tetradecahedral void of the clathrate hydrate framework better than the n-butyl radical.
Thermosetting coating composition and pigmented film formation
申请人:KANSAI PAINT CO. LTD.
公开号:EP0435356A1
公开(公告)日:1991-07-03
A thermosetting coating composition comprising as essential components:
(a) a hydroxyl group-containing base resin,
(b) an alicyclic polyepoxide crosslinking agent, and
(c) a catalyst selected from the group consisting of a quaternary ammonium hydroxide and a metal chelate.