Aqueous lubricant for plastic working of metallic material...

Solid anti-friction devices – materials therefor – lubricant or se – Lubricants or separants for moving solid surfaces and... – Silicon dioxide – silicic acid – orthosilicate – or...

Reexamination Certificate

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C508S143000, C508S144000, C508S154000, C508S156000, C508S157000, C508S158000, C508S165000, C508S167000, C508S170000, C508S175000, C508S450000, C508S451000, C508S537000, C508S539000

Reexamination Certificate

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07414012

ABSTRACT:
A waterborne lubricant, useful in the plastic working of metals, which imparts a lubricating behavior to the surface of metals in the absence of a conversion coating contains (A) water-soluble inorganic salt and (B) wax, wherein these components are dissolved or dispersed in water and the (B)/(A) solids weight ratio is 0.3 to 1.5. The (C) metal salt of a fatty acid can also be present at a (C)/(A) solids weight ratio of 0.01 to 0.4. The water-soluble inorganic salt (A) can be selected from the sulfates, silicates, borates, molybdates, and tungstates. The wax (B) can be a synthetic wax having a melting point of 70 to 150° C. A lubricating coating is formed by application to give a post-drying add-on of 0.5 to 40 g/m2. A method for using said lubricant is also provided.

REFERENCES:
patent: 4403490 (1983-09-01), Sargent
patent: 4808324 (1989-02-01), Periard et al.
patent: 6194357 (2001-02-01), Murata et al.
patent: 6376433 (2002-04-01), Connor
patent: 6455476 (2002-09-01), Imai et al.
patent: WO 99/64544 (1999-12-01), None

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