1
Velten Ulf Dr, Sulser Ueli, Widmer Juerg Dr, Schober Irene Dr, Buerge Theodor A: Polymers for cement dispersing admixtures. Sika, October 4, 2001: EP1138697-A1 (71 worldwide citation)

Polymers for cement dispersing admixtures, which show different performing properties in concrete are described. All polymers are based on a composition of reactants, namely a) a poly(acrylic acid), b) a polyalkyleneglycol-monoalkylether and, optionally c) a alpha -amino-polyalkyleneglycol- omega -a ...


2
Widmer Juerg Dr, Sulser Ueli, Buerge Theodor A, Velten Ulf Dr, Krapf Huber Anna: Multipurpose, cement dispersing polymers for high flow and high strength concrete. Sika, December 20, 2000: EP1061089-A1 (29 worldwide citation)

A new category of multi-purpose polymers is presented, said polymers being capable to serve as a cement dispersing agent and which at the same time are set-accelerating and do have shrinkage reducing- and anticorrosive properties to steel. Said polymers are ester-and amidgroup-modified acrylic polym ...


3
Buerge Theodor A, Boesch Klemens, Mai Dieter: Process for accelerating the setting and hardening of a material which contains a hydraulic binder, setting and hardening accelerator and use of a mixture for accelerating the setting and hardening.. Sika, June 14, 1995: EP0657398-A1 (20 worldwide citation)

In a process for accelerating the setting and hardening of a material which contains a hydraulic binder or which consists of a hydraulic binder there is used a setting accelerating mixture which is free of alkali metals and free of chlorides. Said setting accelerating mixture contains at least one w ...


4
Buerge Theodor A, Maeder Urs: Set retarder for wet spraying.. Sika, October 14, 1992: EP0508158-A2 (19 worldwide citation)

The invention relates to the use of a novel set retarder for the wet spraying process, the setting time being extended and, for example, being delayed to such an extent that the spraying material can be delivered from a ready-mixed concrete factory to the building site and, at the latter, remains us ...


5
Schober Irene Dr, Buerge Theodor A, Velten Ulf Dr, Widmer Juerg Dr, Buerge Christian M, Maeder Urs Dr: Cement admixture for improved slump life. Sika, September 26, 2001: EP1136508-A1 (19 worldwide citation)

Described are polymers and cement admixtures which reduce drop in fluidity with time. Said admixture comprises at least one polymer of the present invention and at least one polymer A. The polymer of the present invention comprises side chains of which at least 10 weight-% can be cleaved in alkaline ...


6
Buerge Theodor A, Bracher Gustav Dr: Mortar and concrete to be processed by wet spraying and method of production of mortar and concrete.. Sika, January 15, 1992: EP0465991-A1 (17 worldwide citation)

The invention relates to concrete and mortar for the wet-spraying process, whose setting time is extended and, for example, retarded to such an extent that it can be supplied from a ready-mixed concrete works to the building site and remains processable at the latter for up to 2 days, but can be cau ...


7
Buerge Theodor A, Boesch Klemens, Mai Dieter: Alkali-free liquid setting and hardening accelerator for cement. Sika, November 13, 1996: EP0742179-A1 (11 worldwide citation)

A setting and hardening accelerator (I) is claimed, contg.: (a) calcium sulphate dihydrate; and (b) amorphous Al hydroxide and/or an amorphous and/or crystalline basic Al salt. Also claimed is a process for accelerating the setting and hardening of cement, or cement-based mortar or concrete, by addi ...


8
Sommer Marcel, Wombacher Franz, Buerge Theodor A: Alkali-free set and hardening accelerator. Sika, January 2, 2002: EP1167317-A1 (11 worldwide citation)

Binding and hardening accelerator consists of a water-soluble fluoride-containing and sulfate-containing aluminum salt.


9
Buerge Theodor A, Ueli Sulser, Juerg Widmer Dr, Krapf Huber Anna: Dispersing agent for high-flow or self-compacting concrete. Sika, April 29, 1998: EP0838444-A1 (10 worldwide citation)

Cement dispersing agents for self compacting concrete of high flowability, comprising a water-soluble N-vinyl copolymer, prepared by copolymerizing (a) an N-vinyl lactame or N-vinyl-amide with (b) a polyethylene glycol ester of maleic acid containing 6 to 300 moles of oxyethylene groups per molecule ...


10
Buerge Theodor A, Mai Dieter, Peray Kurt: Hardening accelerator for cement. Sika, August 19, 1998: EP0858981-A1 (9 worldwide citation)

A setting and hardening accelerator (I) contains an aluminium salt, which also contains (a) amorphous silica and (b) an inorganic and/or organic thixotropic agent and/or an organic carbonate ester. Also claimed is a process for setting and hardening cement, or mortar or concrete made from cement, by ...