Chemical assisted lapping and polishing of metals
View Patent ↗Compositions for lapping gears and methods for preparing the same are described. These compositions contain a salt of polyaspartic acid and may contain additional components that are useful for lapping gears. Also provided are processes for using the compositions described herein.
1. A composition consisting of a salt of polyaspartic acid, sodium 3-nitrobenzenesulfonate, citric acid, sodium tripolyphosphate, anhydrous monosodium phosphate, disodium dihydrogen pyrophosphate, and sodium carboxymethylcellulose.
2. The composition according to claim 1 , wherein said salt of polyaspartic acid is the sodium salt of polyaspartic acid.
3. The composition according to claim 1 , consisting of at least about 9% by weight of a salt of polyaspartic acid.
4. The composition according to claim 1 , consisting of at least about 9.5% by weight of a salt of polyaspartic acid.
5. A product consisting of
(i) a container consisting of the composition of claim 1 ; and
(ii) a container consisting of one or more of a grit.
6. A composition consisting of a salt of polyaspartic acid, a grit, sodium 3-nitrobenzenesulfonate, citric acid, sodium tripolyphosphate, anhydrous monosodium phosphate, disodium dihydrogen pyrophosphate, and sodium carboxymethylcellulose.
7. A composition consisting of water, a salt of polyaspartic acid, sodium 3-nitrobenzenesulfonate, citric acid, sodium tripolyphosphate, anhydrous monosodium phosphate, disodium dihydrogen pyrophosphate, a grit, and sodium carboxymethyl cellulose.
8. The composition according to claim 7 , consisting of:
(a) about 24.4% by weight of water;
(b) about 3% by weight of the sodium salt of polyaspartic acid;
(c) about 1.6% by weight of citric acid;
(d) about 1.2% by weight of sodium tripolyphosphate;
(e) about 0.1% by weight of anhydrous monosodium pyrophosphate;
(f) about 1% by weight of disodium dihydrogen pyrophosphate;
(g) about 68% by weight of zirconium, aluminum, and hafnium oxides;
(h) about 0.6% by weight of sodium carboxymethylcellulose; and
(i) about 0.1% by weight of sodium 3-nitrobenzenesulfonate.
9. The composition according to claim 7 , consisting of
(a) about 10 to about 30% by weight of water;
(b) about 0.01 to about 12% by weight of the sodium salt of polyaspartic acid;
(c) about 0.01 to about 10% by weight of citric acid;
(d) about 0.01 to about 5% by weight of sodium tripolyphosphate;
(e) about 0.01 to about 5% by weight of anhydrous monosodium pyrophosphate;
(f) about 0.01 to about 5% by weight of disodium dihydrogen pyrophosphate;
(g) about 0.01 to about 2% by weight of sodium carboxymethylcellulose;
(h) about 0.01% to about 3% by weight of sodium 3-nitrobenzenesulfonate; and
(i) about 25% to about 75% by weight of zirconium, aluminum, and hafnium oxides.
10. A composition consisting of:
(i) about 10 to about 30% by weight of water;
(ii) about 0.01 to about 12% by weight of the sodium salt of polyaspartic acid;
(iii) about 0.01 to about 10% by weight of oxalic acid;
(iv) about 0.01 to about 5% by weight of sodium tripolyphosphate;
(v) about 0.01 to about 5% by weight of anhydrous monosodium pyrophosphate;
(vi) about 0.01 to about 5% by weight of disodium dihydrogen pyrophosphate;
(vii) about 0.01 to about 2% by weight of sodium carboxymethylcellulose;
(viii) about 0.01% to about 3% by weight of sodium 3-nitrobenzenesulfonate; and
(ix) about 25% to about 75% by weight of a grit.
11. A composition consisting of:
(a) about 10 to about 30% by weight of water;
(b) about 0.01 to about 12% by weight of the sodium salt of polyaspartic acid;
(c) about 0.01 to about 10% by weight of citric acid;
(d) about 0.01 to about 5% by weight of sodium tripolyphosphate;
(e) about 0.01 to about 5% by weight of anhydrous monosodium pyrophosphate;
(f) about 0.01 to about 5% by weight of disodium dihydrogen pyrophosphate;
(g) about 0.01 to about 2% by weight of sodium carboxymethylcellulose;
(h) about 0.01% to about 3% by weight of sodium 3-nitrobenzenesulfonate; and
(i) about 25% to about 75% by weight of a grit.