Cement mixes containing additives for altering the hardening rate of chemically bonded silico-phosphate cements and methods therefor

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United States of America Patent

PATENT NO 8652248
APP PUB NO 20130199415A1
SERIAL NO

13758200

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Abstract

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A cement mix for preparation of a magnesium silico-phosphate cement (MSPC) with an altered hardening rate is provided. The cement mix comprises on the order of 1% of an [MF6]n− salt or acid. Upon addition of water, the mix produces a final set cement that has similar physical properties to those of a cement prepared from a mix lacking the additive, but with a significantly altered setting time. In some embodiments of the invention, the additive is provided in the form of a coating for the MgO component of the mix. In preferred embodiments, H2TiF6, Na2TiF6 and/or K2TiF6 are used as retarders, while K3AlF6 is used as an accelerant. Other embodiments use M′nMF6 compounds wherein M′ is an alkali metal, an alkaline earth metal, or H, and M is chosen from inter alia Ti (n=2), Zr (n=2), P (n=1), Al (n=3), and Sb (n=1).

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Patent Owner(s)

Patent OwnerAddress
IMI TAMI INSTITUTE FOR RESEARCH AND DEVELOPMENT LTDP O BOX 10140 HAIFA BAY 26111

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Frim, Ron Haifa, IL 26 47
Ginzberg, Eyal Zikhron-Yaakov, IL 6 6
Gorelik, Yelena Kiryat Byalik, IL 2 3
Hanuka, Ezrah Haifa, IL 2 3
Masri, Basam Haifa, IL 2 3
Perle, Dorit Haifa, IL 5 6
Shikolsky, Gideon Kiryat Motzkin, IL 8 20
Vultz, Eyal Yehihel Kfar Saba, IL 2 3
Weissman, Aharon M.P. Misgav, IL 12 20

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