Patent ID: 8273803

Claim:
A method of repairing a hard surface comprising the steps of: mixing a composition comprising an effective amount of tetra calcium phosphate and a compound of the formula where A is O, CH 2 , or S; R is H, NH 2 , NHCO(CH 2 ) t CH 3 where t is 0 to 2, NH(CH 2 ) x CH 3 where x is 0 to 3, NR1R2 where R1 is (CH 2 ) y CH 3 and R2 is (CH 2 ) y CH 3 where y is 0 to 2, (CH 2 ) z CH 3 where z is 0 to 3, where m is 0 to 1, and where n is 0 to 3 and wherein the compound is present in an amount from about 10% to about 90% by weight based on the combined weight of the tetra calcium phosphate and the compound, with sufficient aqueous medium to create a mixture; applying the mixture to the hard surface to be repaired; and allowing the mixture to cure.