Flexible polyurethane foam with high durability
AssigneeMitsui Chemicals, Inc.
InventorsMasahiro Isobe, Kazuhiko Ohkubo, Seijiro Sakai, Usaji Takaki, Tadahito Nobori, Tsukuru Izukawa, Satoshi Yamasaki
Life of this patent
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Abstract
A flexible polyurethane foam prepared by reacting polyisocyanate with polyol and/or polymer polyol containing dispersed polymer microparticles obtained by polymerizing an unsaturated compound, water, catalyst, surfactant and, when needed, crosslinking agent and other auxiliary agents, wherein a portion or the whole of the polyol and/or the polymer polyol is prepared in the presence of a compound having a nitrogen-phosphorus double bond as a catalyst, have excellent wet compression set, fatigue by constant-load pounding and dynamic durability.
Claims25
A flexible polyurethane foam prepared from a polyol ingredient which is a polyol and/or polymer polyol having dispersed polymer microparticles obtained by polymerizing an unsaturated compound in the polyol;
- water, catalyst, surfactant, and polyisocyanate, wherein the polyol ingredient is prepared in the presence of a compound having a nitrogen-phosphorus double bond as a catalyst wherein the compound having a nitrogen-phosphorus double bond is a phosphazenium compound represented by the formula (1) or the formula (2):
- ##STR14## wherein a, b and c are individually a positive integer of 3 or less or 0 and are not all 0 at the same time, R's are the same or different hydrocarbons having 1 to 10 carbon atoms, and two R's located on each common nitrogen atom may be coupled together to form a ring structure, X indicates the number of phosphazenium cations, Z.sup.x- is an anion of a X-valent active hydrogen compound, ##STR15## wherein d, e, f and g are individually a positive integer of 3 or less or 0 and are not all 0 at the same time, R's are the same or different hydrocarbons having 1 to 10 carbon atoms, and two R's located on each common nitrogen atom may be coupled together to form a ring structure, X indicates the number of phosphazenium cations, Z.sup.x- is an anion of a X-valent active hydrogen compound.
A flexible polyurethane foam having 11.5% or less of wet compression set, and 20% or less of hardness loss and 2.5% or less of height loss in dynamic durability.
Dependencies are inferred from the claim text.