发明名称 |
Method of making hydroxymethylphosphonate, polyurethane foam-forming compositions, polyurethane foam and articles made therefrom |
摘要 |
A method of making hydroxymethylphosphonate comprising heating paraformaldehyde in a solvent to a desired reaction temperature, wherein the solvent is present in at least an amount necessary to solvate or suspend the paraformaldehyde; adding at least one alkyl phosphite to the heated paraformaldehyde, to provide hydroxymethylphosphonate, the alkyl phosphite being added to the heated paraformaldehyde at a rate which will avoid or inhibit the production of a significant exotherm and resulting high/significant level of acid by-product(s), there being present in the reaction medium at least one hindered amine catalyst in which the nitrogen in the amine is directly bound to a secondary and/or tertiary carbon of an organic group; and, optionally, following the completion of the addition, heating the reaction mixture to an elevated temperature. |
申请公布号 |
US9169278(B2) |
申请公布日期 |
2015.10.27 |
申请号 |
US201414314810 |
申请日期 |
2014.06.25 |
申请人 |
ICL-IP America Inc. |
发明人 |
Stowell Jeffrey K.;Pirrelli Ronald L.;Yanosy Ryan |
分类号 |
C08G18/16;C07F9/40;C08L75/04;C08K5/5333;C08J9/00 |
主分类号 |
C08G18/16 |
代理机构 |
Dilworth & Barrese, LLP |
代理人 |
Dilworth & Barrese, LLP |
主权项 |
1. A polyurethane foam-forming composition comprising a polyol, an isocyanate, a catalyst and a hydroxymethylphosphonate wherein the hydroxymethylphosphonate is produced by a method comprising
heating paraformaldehyde in a solvent to a desired reaction temperature, wherein the solvent is present in at least an amount necessary to solvate or suspend the paraformaldehyde; adding at least one alkyl phosphite to the heated paraformaldehyde, to provide hydroxymethylphosphonate, the alkyl phosphite being added to the heated paraformaldehyde at a rate which will avoid or inhibit the production of acid by-product(s) in an amount of greater than about 1 percent by weight, there being present in the reaction medium at least one hindered amine catalyst; and, optionally, following the completion of the addition, heating the reaction mixture to an elevated temperature. |
地址 |
Ardsley NY US |