C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 18/48 (2006.01) C08G 18/76 (2006.01) C09J 175/08 (2006.01)
Patent
CA 2308540
In a process for producing sound-absorbing PUR foams having an adhesive surface by reacting organic and/or modified organic polyisocyanates (a) with a polyetherol mixture (b) and, if desired, further compounds (c) bearing hydrogen atoms which are reactive toward isocyanates, in the presence of water and/or other blowing agents (d), catalysts (e) and, if desired, further auxiliaries and additives (f), the polyetherol mixture (b) comprises b1) at least one bifunctional to eight-functional polyetherol based on ethylene oxide and propylene oxide and having an OH number of from 20 to 80 mg KOH/g and a proportion of primary OH groups of > 50%, b2) at least one polyetherol based on ethylene oxide and propylene oxide and/or butylene oxide and a bifunctional to eight-functional initiator and having an OH number of from 20 to 80 mg KOH/g, where the proportion of ethylene oxide in the polyetherol is > 30% by weight, in amounts of from 10 to 50 parts by weight, and b3) at least one polyetherol based on propylene oxide and/or butylene oxide and, if desired, ethylene oxide and a bifunctional to eight-functional initiator and having an OH number of from 30 to 400 mg KOH/g, where the proportion of ethylene oxide in the polyetherol is < 30% by weight. The sound-absorbing PUR foams produced by this process can be used as damping material.
Falke Peter
Schmaler Kirsten
Zaschke Bernd
Basf Aktiengesellschaft
Robic
LandOfFree
Production of sound-absorbing polyurethane foams having an... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Production of sound-absorbing polyurethane foams having an..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Production of sound-absorbing polyurethane foams having an... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1597018