Claims
- 1. In a two-step method of preparing high molecular weight amines, the improvement of preparing active amines containing urea linkages which comprises reacting a polyoxypropylenediamine of the formula: ##STR14## wherein x has a value of 0-60, and R' is methyl with a polyisocyanate selected from the group consisting of isophorone diisocyanate, tetramethylxylene diisocyanate, 1,6-hexamethylene diisocyanate and methylene bis(cyclohexylisocyante), to form an intermediate adduct and subsequently reacting said intermediate adduct with an end amine having the formula:
- H.sub.2 N--(CH.sub.2 CH.sub.2 O).sub.x CH.sub.2 --NH.sub.2
- where x=1, 2 or 3, wherein both steps take place without a catalyst.
Parent Case Info
This application is a continuation of Ser. No. 07/078,311, filed Jul. 27, 1987 now abandoned.
US Referenced Citations (13)
Foreign Referenced Citations (1)
Number |
Date |
Country |
184133 |
Jun 1986 |
EPX |
Non-Patent Literature Citations (1)
Entry |
Cunliffe et al, Polymer, Feb. 26, 1985, p. 301 only. |
Continuations (1)
|
Number |
Date |
Country |
Parent |
78311 |
Jul 1987 |
|