Back to results
US 6,444,720 B1Granted
Open-cell rigid polyurethane foams
AssigneeBayer Aktiengesellschaft
InventorsBert Klesczewski, Jörg Hofmann, Pramod Gupta
Life of this patent
Estimating the term…
Abstract
Open-cell rigid foams containing urethane and/or isocyanurate and/or urea groups are produced with a long-chain polyether polyol having low double bond content.
Claims14
An open-cell rigid foam containing a urethane, isocyanurate or urea group produced by reacting
- a) a diisocyanate or polyisocyanate with
- b) a polyoxyalkylene polyol having an average of at least two groups which are reactive with an isocyanate group, has a hydroxyl value of from 3 to 90 and contains no more than 15 mmole.kg−1 of carbon-carbon double bonds,
- c) a blowing agent, and optionally,
- d) a catalyst, and/or
- e) auxiliaries and/or additives.
2 more elements
A process for the production of a predominantly open-cell rigid foam containing a urethane, isocyanurate or urea group comprising reacting
- a) a diisocyanate or polyisocyanate with
- b) a polyoxyalkylene polyol having an average of at least two groups which are reactive with an isocyanate group, has a hydroxyl value of from 3 to 90 and contains no more than 15 mmole.kg−1 of carbon-carbon double bonds,
- c) a blowing agent, and optionally,
- d) a catalyst.
1 more element
A hydrophilic substrate for flower cultivation comprising the rigid foam.
Dependencies are inferred from the claim text.