Participants
| Role | Name | HCID | Charge |
|---|
| Reactant | Formaldehyde | HCID 712 | — |
| Reactant | Sulfuric Acid | HCID 1118 | — |
| Reactant | Urea | HCID 1176 | — |
| Reactant | Triethanolamine | HCID 7618 | — |
| Reactant | Crl-8131 | HCID 24751 | — |
| Reactant | Sorbitan mono-(9Z)-9-octadecenoate | HCID 9920342 | — |
| Reactant | Span #80 (Sorbitan monooleate) | HCID 70693544 | — |
| Reactant | HCID 178435162 | HCID 178435162 | — |
| Catalyst | Titanium oxide (Ti3O) | HCID 162651 | — |
| Solvent | Water | HCID 962 | — |
| Solvent | O-Xylene | HCID 7237 | — |
| Product | Crl-8131 | HCID 24751 | — |
| Product | Urea formaldehyde foam | HCID 62705 | — |
Reaction Steps
A urea-formaldehyde prepolymer solution is prepared by heating an aqueous solution of two-hundred-twenty grams of 37% formaldehyde and 82 grams of urea, adjusted to pH 8 with triethanolamine, at 70° C for one hour. Fifty grams of this prepolymer solution are mixed with thirty grams of a 50% by weight dispersion of titanium dioxide in distilled water, and adjusted to pH 6 with dilute sulfuric acid. The aqueous dispersion is emulsified in a solution of six grams of Pluronic L122, three grams of sorbitan monooleate (commerically available as Span 80 from ICI America) and 1.5 grams of a poly(oxyethylene)-poly(oxypropylene) block copolymer with 30% poly(oxyethylene) and a molecular weight of about 2500 (commercially available as Pluronic L 63) in one-hundred grams of xylene to yield a water-in-oil emulsion. This is treated with four milliliters of a 50% by weight solution of monobutyl acid phosphate in toluene and stirred for two hours.
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|
| Patent number | US04087581 |
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| Source dataset | uspto-grants-1978_05 |
|---|
| ORD ID | ord-b9e5ab78aa404bacaa0993020cdab82a |
|---|
| Source note | uspto-grants-1978_05 |
|---|
