C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 18/72 (2006.01) C08G 18/22 (2006.01) C08G 18/32 (2006.01) C08G 18/40 (2006.01) C08G 18/48 (2006.01) C08J 9/12 (2006.01) C08J 9/228 (2006.01) C08L 75/04 (2006.01) C08L 9/00 (2006.01)
Patent
CA 2455513
The present invention provides a high support (HS) and high support-high resilience (HS-HR) flexible polyurethane foams prepared by catalyzed reaction of one or more di- or polyisocyanates at an isocyanate index from about 70 to about 130 with: (a) a polyoxyalkylene polyol or polyoxyalkylene polyol blend having an average hydroxyl weight of at least about 1000 and an average primary hydroxyl content of at least about 25%; and (b) an effective amount of a blowing agent containing water; in the presence of from about 0.01 to about 0.5% parts by weight based on 100 parts by weight of said polyol component of a liquid hydrocarbon containing greater than 50% of polymerized butadiene. The high support (HS) and high support-high resilience (HS-HR) flexible polyurethane foams of the present invention have a reduced force to crush (FTC).
La présente invention procure des mousses de polyuréthane souples offrant un soutien important (SI) et et des mousses de polyuréthane souples offrant un soutien important et possédant une résistance élevée aux chocs (SI-RE) préparées par réaction catalysée entre un di- ou un polyisocyanate ou plus dont l'indice d'isocyanates se situe entre environ 70 et environ 130 et : a) un polyol polyoxyalkylénique ou un mélange de polyols polyalkéniques dont le poids moyen en hydroxyles est d'au moins environ1 000 et la teneur moyenne en hydroxyles primaires est d'au moins environ 25 %; b) une quantité efficace d'un agent gonflant contenant de l'eau, en présence d'à partir environ 0,01 jusqu'à environ 0,5 % parties en poids pour 100 parties en poids du composé polyol en question d'un hydrocarbure liquide composé à plus de 50 % de butadiène. Les mousses de polyuréthane souples SI et SI-RE issues de la présente invention ont une force d'écrasement (FE) réduite.
Adhikari Utpal C.
Hager Stanley L.
Bayer Antwerpen N.v.
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
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