26-08-2021 дата публикации
Номер: US20210261463A1
A composition may be suitable for flowable refractory materials and include calcium aluminate cement, a filler, a plasticizer in the form of a copolymer comprising polyether side chains, and a retarder having at least one acid. An article may include such a composition. 1. A composition suitable for a flowable refractory material , the composition comprising:calcium aluminate cement;a filler;a plasticizer comprising a copolymer comprising a main chain and polyether side chains; anda retarder comprising an acid.2. The composition of claim 1 , wherein the main chain(i) consists of at least one structural unit consisting of a carbon chain having at least 16 carbon atoms,or{'sub': 'n', '(ii) consists of at least one structural unit consisting of a (C—C—O)chain, n being number of at least 5,'}or(iii) consists of at least one structural unit consisting an aromatic or a heteroaromatic system.3. The composition of claim 1 , wherein the polyether side chains of the copolymer are polyether side chains of structural unit (I){'br': None, 'sub': k', 'z, '*—U—(C(O))—X-(AlkO)—W\u2003\u2003(I),'}whereinis a bonding site to the polymer,U is a chemical bond or an alkylene group comprising 1 to 8 carbon atoms and optionally substituted by at least one carboxyester, carboxyl, phosphono, sulfino, sulfo, sulfamido, sulfoxy, sulfoalkyloxy, sulfinoalkyloxy, and/or phosphonooxy,{'sup': '1', 'X is oxygen, sulfur, or NR,'}k is 0 or 1,z is an integer, a mean of which, based on the polymer, is in a range of from 3 to 300,{'sub': 2', '4, 'Alk is independently C-C-alkylene,'}{'sub': 1', '6, 'W is H, a C-C-alkyl radical, an aryl radical, or or Y—F,'}Y is a linear or branched alkylene group comprising 2 to 8 carbon atoms and optionally bearing a phenyl ring,{'sup': '2', 'F is a nitrogen-bonded 5- to 10 membered nitrogen heterocycle optionally comprising, as ring members, in addition to the nitrogen atom and carbon atoms, 1, 2, or 3 additional oxygen, nitrogen, and/or sulfur, where the nitrogen ring ...
Подробнее