Thermosetting toluene-soluble water-insoluble alkylated urea-formaldehyde resin and process for the manufacture thereof
AssigneeAmerican Cyanamid Company
InventorLeonard Joseph Calbo, Jr.
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Abstract
Resins composed of interreacted urea, formaldehyde and a non-tertiary C.sub.4.sub.-6 alkanol in 1:2.3-2.7:1.3-1.8 molar ratio containing 0.3-0.7 mol of methylol substituents per mol of interreacted urea therein having molecular weights in the range 350 - 700 are thermosetting, toluene-soluble, and water-insoluble, and are of pumpable viscosity. They are made by a multi-step process containing two acid alkylation steps with intervening removal of water.
Claims17
A thermosetting, storage-stable, toluene-soluble, water-insoluble, alkylated urea-formaldehyde resin of pumpable viscosity, at room temperature, at 100% resin solids content composed of interreacted urea, formaldehyde and a non-tertiary C.sub.4.sub.-6 alkanol in 1:2.3-2.7:-1.3-1.8 molar ratio respectively;
- the number average molecular weight of the resin being between about 350 and 700, and said resin containing between 0.3 and 0.7 mol of methylol substituents per mol of interreacted urea therein.
A resin according to claim wherein the C.sub.4.sub.-6 alkanol is n-butanol.
Dependencies are inferred from the claim text.