FIELD: organic chemistry, polymers.
SUBSTANCE: invention relates to production of mixture of polyfunctional isocyanates and its using as an isocyanate component and a cross-linking agent simultaneously in preparing both rigid and elastic polyurethane foams. Invention claims a method for preparing polyisocyanate cross-linking composition for preparing polyurethane foams that contains polyisocyanate and 2,4,6-triisocyanatetoluene. Method involves addition to phosgene solution the solution of melted mixture of polyamine with 2,4,6-triaminotoluene in chlorobenzene in the mass ratio = (85-98):(2-15), respectively, at 0-10 C followed by phosgenation in elevation of temperature to 130 C up to disappearance of amine chlorohydrate suspension formed in reaction. Invention provides preparing mixed isocyanate component instantaneously that corresponds to existing norms and standards being without cost rise in manufacturing.
EFFECT: improved preparing method.
1 cl, 7 tbl, 6 ex
| Title | Year | Author | Number |
|---|---|---|---|
| POLYISOCYANATE COMPOSITION | 2005 |
|
RU2300519C1 |
| METHOD OF PREPARING POLYISOCYANATE AND ISOCYANATE COMPOSITION (VERSIONS) | 1997 |
|
RU2128674C1 |
| MIXTURE FOR PRODUCING STIFF POLYURETHANE FOAM | 0 |
|
SU1654316A1 |
| METHOD OF POLYPHENYLENE-POLYMETHYLENE-POLYISOCYANATE MIXTURE SYNTHESIS | 1991 |
|
RU2007391C1 |
| N, N, N, N, N, N-HEXA-(2-OXYPROPYL)-2,4,6-TRIAMINOTOLUENE AND METHOD FOR ITS PREPARING | 2002 |
|
RU2233267C1 |
| METHOD OF PRODUCING POLYISOCYANATES | 2004 |
|
RU2361857C2 |
| METHOD OF PRODUCING ELASTIC FOAMED POLYURETHANE | 2001 |
|
RU2270205C2 |
| METHOD OF PRODUCING FLEXIBLE POLYURETHANE FOAM | 2010 |
|
RU2507215C2 |
| POLYISOCYANURATE-CONTAINING FOAM MATERIALS WITH LONG-TERM TRANSITION BETWEEN MIXING OF COMPONENTS AND TRANSITION TO CREAMY MASS AND CAPABILITY OF INSTANT CURING | 2018 |
|
RU2780087C2 |
| POLYMERIC MINERAL COMPOSITION | 1999 |
|
RU2151116C1 |
