公开(公告)号：EP0832140A1

公开(公告)日：1998-04-01

申请号：EP97919323.0

申请日：1997-04-08

申请人： MBT HOLDING AG

发明人： LEIKAUF, Bernhard ,  VALENTI, Salvatore ,  OPPLIGER, Max

IPC分类号： C04B24 ,  C08F222 ,  C08F290 ,  C08G65 ,  C08G81 ,  C04B103

CPC分类号： C08F290/068 ,  C04B24/267 ,  C04B24/2694 ,  C04B24/42 ,  C04B2103/30 ,  C04B2103/34 ,  C08F222/08 ,  C08F290/062

摘要： A random styrene-maleic anhydride copolymer in free acid or salt form, wherein the copolymer has the following types and numbers of monomer units (1), (x), (y), in which: M is selected from hydrogen, a cation and a residue of a hydrophobic polyalkylene glycol or polysiloxane; R is the residue of a methylpoly(ethylene) glycol of molecular weight (weight-average) 900-2000; x = 0.35-0.75 and y= 0.25-0.65. The copolymers are useful as superplasticisers in cementitious compositions such as concretes and mortars.

公开(公告)号：EP0775097B1

公开(公告)日：1998-12-23

申请号：EP95929091.7

申请日：1995-08-07

申请人： MBT HOLDING AG

发明人： LEIKAUF, Bernhard

IPC分类号： C04B28/02

CPC分类号： C04B28/02 ,  C04B2103/10 ,  C04B2111/00146 ,  C04B14/303 ,  C04B22/082 ,  C04B22/124 ,  C04B24/2641 ,  C04B40/0039 ,  C04B22/148 ,  C04B24/122

摘要： An accelerating admixture for use with sprayable cementitious compositions such as shotcrete comprises a mixture of (a) amorphous aluminium hydroxide and/or aluminium hydroxysulphate, and (b) at least one amine, preferably an alkanolamine. In a preferred embodiment, the admixture also comprises an aqueous dispersion of at least one polymer which comprises pendant carboxylic moieties.