Process for producing flexible polyurethane foam and appts. for producing flexible polyurethane foams
A technology of polyurethane foam and production equipment, which is applied in the field of equipment for this process, can solve problems such as difficult production of chair cushions
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[0140] (Preparation process of polyoxyalkylene polyether polyol)
[0141] The polyoxyalkylene polyether polyols used in the present invention are prepared by well-known production processes. In the presence of a catalyst, the polyoxyalkylene polyether polyol is prepared by performing ring-opening polymerization on the above-mentioned alkylene oxide by using the above-mentioned active hydride as an initiator.
[0142] For example, the process of producing polyoxyalkylene polyether polyols includes the process of addition polymerization of alkylene oxides with active hydrides as initiators under high pressure and in the presence of polymerization catalysts. Active hydrides and alkylene oxides may be used alone or in combination.
[0143] It is desirable to obtain polyoxyalkylene polyether polyols with a total unsaturation of less than 0.06 meq / g, preferably less than 0.04 meq / g, more preferably between 0.005 and 0.030 meq / g, especially preferably between 0.005 and 0.026 betwee...
Embodiment 2
[0179]
[0180] The polyoxyalkylene polyether polyols included in polyols (a), (b) and (c) used in Example 2 were prepared as oligomers or polymers by ring-opening polymerization using active hydrides as initiators .
[0181] (active hydride used in Example 2)
[0182] The active hydride used as the initiator for the preparation of the polyoxyalkylene polyether polyol may be, for example, an active hydride containing an active hydrogen atom on an oxygen atom or an active hydride containing an active hydrogen atom on a nitrogen atom.
[0183] Examples of active hydrides containing active hydrogen atoms on oxygen atoms include the corresponding hydrides mentioned above.
[0184] Examples of active hydrides containing active hydrogen atoms on nitrogen atoms include the corresponding hydrides mentioned above.
[0185] Among these hydrides, preferably used hydrides such as polyhydric alcohols, sugars and their derivatives, more preferably the following active hydrides 1,2-ethyl...
Embodiment
[0368] The present invention will be further described below using "Preparation Example" and "Foaming Example", but they do not limit the scope of the invention. Hereinafter, "parts" means "parts by weight".
[0369] The materials used in the "Preparation Examples" and "Foaming Examples" are as follows. The total degree of unsaturation and the hydroxyl value of the polyester polyol and polymer polyol are measured by the method of JIS K-1557.
[0370] Polyol A1:
[0371] prepared by the block addition of propylene oxide to glycerol and the addition of ethylene oxide blocks to the end of the chain using tetrakis[tris(dimethylamino)phosphoranyllideneamino]phosphorus hydroxide as catalyst The polyester polyol has an oxyethylene group content of 15% by weight, a total unsaturation of 0.025 meq / g and a hydroxyl value of 34 mgKOH / g.
[0372] Polyol A2:
[0373] prepared by the block addition of propylene oxide to glycerol and the addition of ethylene oxide blocks to the end of th...
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