公开(公告)号：US4261755A

公开(公告)日：1981-04-14

申请号：US091746

申请日：1979-11-06

申请人： David Berry ,  Brian D. Black ,  Peter Kirby

发明人： David Berry ,  Brian D. Black ,  Peter Kirby

IPC分类号： C04B24/04 ,  C04B7/35

CPC分类号： C04B24/04

摘要： This invention relates to the use of sodium, calcium and ammonium salts of formic acid as early strength developers and setting accelerators in hydraulic cements, concretes, mortars and plasters. The salts used are acidic salts containing between 1.5 and 5 moles of the formate ion per mole of the cation. These salts have much greater solubility and are more effective than the corresponding calcium salts, particularly under low temperature conditions.

摘要翻译： 本发明涉及甲酸钠，钙和铵盐作为早期强度显影剂和在水硬水泥，混凝土，砂浆和灰泥中固化加速剂的用途。 使用的盐是每摩尔阳离子含有1.5至5摩尔甲酸根离子的酸性盐。 这些盐具有更大的溶解度，并且比相应的钙盐更有效，特别是在低温条件下。

公开(公告)号：US5034148A

公开(公告)日：1991-07-23

申请号：US442566

申请日：1989-11-29

申请人： Brian D. Black

发明人： Brian D. Black

IPC分类号： C11D10/02 ,  C11D3/20 ,  C23G1/08

CPC分类号： C11D3/2075 ,  C23G1/088

摘要： This invention relates to a cleansing composition comprising a detergent and an acid salt and/or a complex of formic acid which has more than one chemical equivalent of formate ion per cation other than hydrogen. The compositions are suitable for cleaning stains and iron oxide deposits caused by the braking mechanism of railway carriages.