Calcium aluminate composition and process for making same
First Claim
1. A cementitious composition particularly useful in the construction of molds, said composition comprising:
- (a) 30-40 percent by weight of a calcium aluminate powder base;
(b) 30-40 percent by weight of at least one particulate inorganic filler;
(c) 25-35 percent by weight of a latex binding agent chemically compatible with said calcium aluminate powder;
(d) 0.0005-0.005 percent by weight of at least one dispersing agent;
(e) 0.0005-0.005 percent by weight of an initiator which initiates the binding of said calcium aluminate powder to said inorganic filler at pH values between 6.5 and 8.0;
(f) 0.05-0.5 percent by weight of at least one surface hardness agent comprising an alkyl-aryl sulfonate compound or salt thereof or an aryl sulfonate compound or salt thereof;
(g) 0.05-0.5 percent by weight of a polymer salt surface gloss agent; and
(h) 1.14 2 percent by weight of at least one metal or non-metal oxide wetting agent.
1 Assignment
0 Petitions
Accused Products
Abstract
A novel cementitious composition based on calcium aluminate and suitable for use in molds is provided. The composition comprises a calcium aluminate powder base, at least one particulate inorganic filler, a latex binding agent chemically compatible with said calcium aluminate powder, at least one dispersing agent, an initiator which initiates the binding of said calcium aluminate powder to said inorganic filler at pH values between 6.5 and 8.0, at least one surface hardness agent comprising an alkyl-aryl sulfonate compound or salt thereof or an aryl sulfonate compound or salt thereof, a polymer salt surface gloss agent, and at least one metal or non-metal oxide wetting agent. A process for producing the composition and a process of applying the composition to form it into a desired shape are also provided.
-
Citations
22 Claims
-
1. A cementitious composition particularly useful in the construction of molds, said composition comprising:
-
(a) 30-40 percent by weight of a calcium aluminate powder base; (b) 30-40 percent by weight of at least one particulate inorganic filler; (c) 25-35 percent by weight of a latex binding agent chemically compatible with said calcium aluminate powder; (d) 0.0005-0.005 percent by weight of at least one dispersing agent; (e) 0.0005-0.005 percent by weight of an initiator which initiates the binding of said calcium aluminate powder to said inorganic filler at pH values between 6.5 and 8.0; (f) 0.05-0.5 percent by weight of at least one surface hardness agent comprising an alkyl-aryl sulfonate compound or salt thereof or an aryl sulfonate compound or salt thereof; (g) 0.05-0.5 percent by weight of a polymer salt surface gloss agent; and (h) 1.14 2 percent by weight of at least one metal or non-metal oxide wetting agent. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 19, 20, 21, 22)
-
-
16. A process for producing a cementitious composition comprising the steps of:
-
(a) soaking 1-2 percent by weight of at least one metal or non-metal oxide wetting agent in water, thereby forming a thick gel; (b) mixing the gel with 25-30 percent by weight of a latex binding agent chemically compatible with calcium aluminate powder, 0.0005-0.005 percent by weight of at least one dispersing agent, 0.0005-0.005 percent of an initiator which initiates the binding of said calcium aluminate powder to said inorganic filler at pH values between 6.5 and 8.0, 0.05-0.5 percent by weight of at least one surface hardness agent comprising an alkyl-aryl sulfonate compound or salt thereof or an aryl sulfonate compound or salt thereof, and 0.05-0.5 percent by weight of a polymer salt surface gloss agent to form a slurry; and (c) combining the slurry with 30-40 percent by weight of a calcium aluminate powder base and 30-40 percent by weight of at least one particulate inorganic filler, thereby forming a cementitious composition. - View Dependent Claims (17, 18)
-
Specification