| 发明名称 |
COMPOSITIONS WITH SYNTHETIC GYPSUM AND METHODS |
| 摘要 |
DTPA-coated synthetic calcined gypsum is provided with alpha-like properties and obtained by spray-coating the synthetic caclined gypsum with DTPA. Cementitious compositions comprising DTPA-coated synthetic calcined gypsum and low water demand are provided as well. Methods for controlling an open time of a cementitious slurry by increasing or decreasing the amount of DTPA-coated synthetic calcined gypsum in the slurry are provided as well. |
| 申请公布号 |
US2016107931(A1) |
申请公布日期 |
2016.04.21 |
| 申请号 |
US201414514961 |
申请日期 |
2014.10.15 |
| 申请人 |
United States Gypsum Company |
发明人 |
Lettkeman Dennis Mark;Wilson John Wesley;Cloud Mike L.;Ball Brian K.;Kaligian Raymond A.;Blackburn Doug |
| 分类号 |
C04B11/00;C04B7/04 |
主分类号 |
C04B11/00 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. Synthetic calcined gypsum coated with diethylene-triamine-pentaacetic acid (DTPA), wherein the synthetic calcined gypsum is obtained by spray-coating the synthetic calcined gypsum with DTPA in a fluidized bed chamber at a temperature in the range from 190 degrees Fahrenheit to 340 degrees Fahrenheit. |
| 地址 |
Chicago IL US |
