Polymer-modified cement mortars and concretes and processes for

Details Polymer-modified cement mortars and concretes and processes for Polymer-modified cement mortars and concretes and processes for

1982-07-06

1985-06-25

Michl, Paul R.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

524 4, C04B 702

Patent

active

045255008

ABSTRACT:
The invention provides articles made of polymer-modified cement mortars and concretes and processes for the production thereof. The processes comprise curing compositions which contain hydraulic cement and aqueous dispersions of polymers or copolymers of methacrylic or acrylic acid esters by means of a two stage curing process the first stage of which is carried out at an elevated temperature under conditions of high humidity and the second stage of which is carried out under drying conditions, preferably at elevated temperatures. The cement mortar and concrete articles according to the invention have relatively high Modulus of Rupture (MOR) values and preferably are roof tiles or shingles or other articles of relatively thin cross-section.

REFERENCES:
patent: 3634567 (1972-01-01), Yang
patent: 3781396 (1973-12-01), Okuda
patent: 3806571 (1974-04-01), Ronnmark
patent: 3819565 (1974-06-01), Yasima
patent: 3850651 (1974-11-01), Duncan
patent: 3879909 (1975-04-01), Lamoria
patent: 3947398 (1976-03-01), Williams
patent: 4002713 (1977-01-01), Duncan
patent: 4070199 (1978-01-01), Downing et al.
patent: 4125504 (1978-11-01), Mani
patent: 4229224 (1980-10-01), Dawson et al.
patent: 4240840 (1980-12-01), Downing et al.
patent: 4410366 (1983-10-01), Birchall et al.
Chemical Abstracts, vol. 79, 1973, No. 82862a.
Chemical Abstracts, vol. 84, 1976, No. 84: 78851g.

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