Cement retarder and cement retardative sheet

Details Cement retarder and cement retardative sheet Cement retarder and cement retardative sheet

1997-07-23

2000-06-20

Lipman, Bernard

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

5253289, 5253302, 525367, 525369, C08F 842

Patent

active

060779101

ABSTRACT:
A polymer comprising an anionic group (e.g. an acid anhydride group, a carboxyl group) and a hydro-philic segment (e.g. a polyoxyalkylene ether unit) is used as a cement retarder. The polymer is obtainable by copolymerization of a monomer including maleic anhydride with a monomer including a vinylalkyl ether-series monomer in which an alkylene oxide is added to allyl alcohol. The polymer may be a copolymer copolymerized with other monomers such as styrene. Use of this cement retarder can provide patterns or washing-finished face on the surface of a concrete product. The cement retarder is suitable for application for a cement retardative sheet.

REFERENCES:
patent: 2790724 (1957-04-01), Bergman
patent: 4050943 (1977-09-01), Sondhe
patent: 4946904 (1990-08-01), Akimoto et al.
patent: 5236975 (1993-08-01), Sekine
patent: 5264470 (1993-11-01), Eoff

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