| 摘要 |
<p>A method is described for producing dispersions of polyurea and the like in polyols of increased stability by polymerizing an amine and an isocyanate in the presence of an aminoalcohol, typically an aminopolyol, having the following formula: <CHEM> wherein A and A min are individually connective atoms which may be same or different, and are selected from the group consisting of carbon and oxygen or combinations thereof with hydrogen atoms or the like satisfying the valences; B is a member selected from the group consisting of nitrogen, NR, R being alkyl or aryl, or CR min , R min being hydrogen, alkyl or aryl; D is a member selected from the group consisting of &lparstr& OCaH2a &rparstr& and &lparstr& O- @-(CH2)4-CH2 &rparstr& wherein a has a value of one to four; X is a member selected from the group consisting of OH, NH2 or H; X min is a member selected from the group consisting of H or NHR min where R min is hydrogen, alkyl or aryl; n and d are individually integers of 0 to 10 and the sum of n and d is at least one and does not exceed 10; S is either 0 or 1; y is an integer of 0 to 4; and m is an integer of at least about 16, with the proviso that when B is nitrogen and either n or d is zero, X and X min are not both H. The dispersions are useful for the production of polyurethane foams.</p> |
