Production of rigid foams containing urethane groups or...

Details Production of rigid foams containing urethane groups or... Production of rigid foams containing urethane groups or...

C - Chemistry, Metallurgy

08

J

C08J 9/14 (2006.01)

Patent

CA 2070209

A process for the production of rigid foams containing urethane groups or urethane and isocyanurate groups, by reacting a) an organic and/or modified organic polyisocyanate with b) at least one relatively high-molecular-weight compound containing at least two reactive hydrogen atoms, and, if desired, c) a low-molecular-weight chain extender and/or cross- linking agent, in the presence of d) a blowing agent, e) a catalyst and, if desired, f) assistants and/or additives, in which the blowing agent (d) used is at least one vinylfluoroalkane of the formula CH2=CH-CnF2n+1 in which n is an integer from 1 to 6, (di), or a mixture of at least one such vinylfluoroalkane (di) and at least one further physical and/or chemical blowing agent (dii) which is different from (di), and blowing agent-containing emul- sions which contain at least one vinylfluoroalkane and at least one starting component (a), (b), (c) or (b) and (c).

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