Process for making hydrophilic polyurethane foams
AssigneeBayer Aktiengesellschaft
InventorsGert Jabs, Gunther Loew
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Abstract
A process for making a hydrophilic polyurethane foam suitable for sponges and wiping cloths which comprises reacting an organic polyisocyanate and an organic compound having reactive hydrogen atoms in a mixture containing a blowing agent and an alkyl aryl sulphonic acid.
Claims6
In a process for producing a hydrophilic polyurethane foam which comprises reacting an organic polyisocyanate, an organic compound which contains at least two active hydrogen atoms in a mixture containing a blowing agent, the improved process of producing a hydrophilic polyurethane which comprises including in the reaction mixture from about 2 to about 10% by weight based on the weight of said organic compound of an alkyl aryl sulphonic acid which is soluble in said organic compound wherein said alkyl aryl sulphonic acid has the formula
- R.sub.n --Ar--[--SO.sub.3 H].sub.m
- wherein
- Ar represents a C.sub.6 -C.sub.14 arylene group,
- R represents an alkyl group of 2-20 carbon atoms with the proviso that the total number of carbon atoms of all alkyl groups is from 4 to 40 carbon atoms,
- n in an integer of 1 to 4, and
- m is an integer from 1 to 3
Dependencies are inferred from the claim text.