Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1994-02-24
1996-11-19
Michl, Paul R.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
524267, 524268, 524375, 524376, 524492, C08J 300, C08L 3300, C08K 554, C08K 506
Patent
active
055763782
ABSTRACT:
Polymers with a high glass transition temperature are used in cement additives to produce a portland cement mortar or concrete that does not have the initial stickiness typical of prior art polymer-modified portland cement compositions and does not form a crust on the surface when exposed to air drying, thus improving the working time of the mix. This simplifies equipment cleaning and permits the use of transit mixers for field applications of polymer-modified concrete. The properties of the mortar and concrete modified with these materials, both in the plastic and hardened state, are equivalent or superior to those of the currently available products which use film-forming materials. Within the scope of this invention are a redispersible powdered cement additive, a redispersible polymer powder and a ready-to-use portland cement composition, as well as related processes.
REFERENCES:
patent: 3043790 (1962-07-01), Sanders
patent: 3228907 (1966-01-01), Eash
patent: 3354169 (1967-11-01), Shafer et al.
patent: 3822230 (1974-07-01), Nelson
patent: 4057528 (1977-11-01), Hunt
patent: 4086201 (1978-04-01), Peters et al.
patent: 4088804 (1978-05-01), Cornwell et al.
patent: 4125504 (1978-11-01), Mani et al.
patent: 4134872 (1979-01-01), Lee
patent: 4151150 (1979-04-01), Peters et al.
patent: 4156669 (1979-05-01), Lee
patent: 4202809 (1980-05-01), Eash
patent: 4263191 (1981-04-01), Eck et al.
patent: 4340510 (1982-07-01), Howanietz
patent: 4398957 (1983-08-01), Ceska et al.
patent: 4767460 (1988-08-01), Parcevaux et al.
patent: 4861822 (1989-08-01), Keskey et al.
patent: 4863979 (1989-09-01), Beyersdorf et al.
patent: 4960810 (1990-10-01), Foster et al.
patent: 5087656 (1992-02-01), Yoshinaga
patent: 5250578 (1993-10-01), Cornwell
Yoshihiko Ohama et al, "Properties of Polymer-Modified Mortars Using Styrene-Butyl Acrylate Latexes with Various Monomer Ratios", ACI Materials Journal, Jan.-Feb. 1991, pp. 56-61.
Joseph A. Lavelle, "Acrylic Latex-Modified Portland Cement", ACI Materials Journal, Jan.-Feb. 1988, pp. 41-48.
Derwent Abstract, 95-000446/01, M. Angel et al., BASF AG.
Derwent abstract 83-46975K/20, DE 3143070-A, May 11, 1983.
Derwent abstract 76-30272X/17, DE 2445813-A, Apr. 15, 1976.
Derwent abstract 83-46976K/20, EP 0 078 449-A, May 11, 1983.
Kuhlmann Louis A.
Moldovan Daniel
Young, Jr. James W.
DeWitt LaVonda R.
Michl Paul R.
The Dow Chemical Company
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