发明名称 |
METHOD FOR PRODUCING A HARD POLYURETHANE-POLYISOCYANURATE FOAMED MATERIAL |
摘要 |
The present invention relates to a process for producing a rigid polyurethane-polyisocyanurate foam C, comprising the step of reacting (i) an isocyanate-terminated prepolymer B with (ii) an activator component A comprising at least one trimerisation catalyst A1 and at least one blowing agent A3 in a reaction mixture to form a foam, characterised in that—there is used an isocyanate-terminated prepolymer B obtained from a reaction of an isocyanate B1 having a mean isocyanate functionality of from ≧2.3 to ≦̸2.9 with a polyol component B2, and—the activator component A comprises water as the blowing agent A3 in an amount of from ≧5 wt. % to ≦̸50 wt. %,—the isocyanate index in the reaction mixture is in a range of from ≧400 to ≦̸500, and—the isocyanate content of the prepolymer B is in a range of from ≧21 wt. % to ≦̸30 wt. %, based on the total mass of the prepolymer B, and—wherein in the reaction of the prepolymer B and the activator component A a conversion contribution to polyisocyanurate of ≦̸75% is achieved. Rigid foams C so produced have good flame retarding properties while at the same time having good insulating properties and stability properties. The present invention relates further to a rigid polyisocyanurate foam C produced by the process according to the invention, to the use of such a rigid polyisocyanurate foam C in the production of heat-insulating structural components, and to a heat-insulating structural component comprising such a rigid polyurethane-polyisocyanurate foam. |
申请公布号 |
EP2812370(A1) |
申请公布日期 |
2014.12.17 |
申请号 |
EP20130702487 |
申请日期 |
2013.02.05 |
申请人 |
BAYER INTELLECTUAL PROPERTY GMBH |
发明人 |
SCHLEIERMACHER, STEPHAN;KLASEN, PATRICK;ALBERS, REINHARD;MOERS, STEPHAN;STEINMEISTER, DIRK;SEIDEL, DIETER;HEINEMANN, TORSTEN;ARNTZ, HANS-DETLEF |
分类号 |
C08G18/73;C08G18/09;C08G18/10;C08G18/22;C08G18/32;C08G18/42;C08G18/48;C08G18/76;C08G18/79;C08G101/00;C08J9/00;C08J9/36 |
主分类号 |
C08G18/73 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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