US4152176A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing titanium-containing phosphate conditioner for metal surfaces
Assignee: Hull R O and Co Inc
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Filing: 1978-08-07
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Granted: 1979-05-01
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Expires: 1998-08-07
Abstract
Abstract The present invention relates to an improved method of preparing titanium-containing phosphate conditioners useful in cleaning and activating the surface of ferrous, zinc or aluminum metal and alloys thereof for subsequent reaction with phosphate coating solutions. The method comprises the steps of (a) preparing a mixture consisting essentially of water, sodium tripolyphosphate, disodium phosphate and a titanium-containing compound and (b) adding said mixture to solid disodium phosphate with mixing whereby a solid titanium phosphate composition is obtained. The invention provides a method for forming a dry activating composition which does not require the application of any energy such as heat to the material. When the solid titanium phosphate compound is dissolved in water to form pretreatment solutions it can be employed successfully for activating metal surfaces in preparation for reaction with phosphate coating solutions.
Inventors
- 👤 Donald J. Guhde
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:56
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/78; C23C22/80
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
60 words
A method of preparing a solid titanium-containing phosphate composition which comprises the steps of: (a) preparing a mixture consisting essentially of water, sodium tripolyphosphate, disodium phosphate and a titanium-containing compound at a temperature of from about 65° to about 95° C., and (b) adding said mixture to solid disodium phosphate with mixing whereby a solid titanium phosphate composition is obtained.
Claim 2
Independent Claim
60 words
A method of preparing a solid titanium-containing phosphate composition which comprises the steps of: (a) preparing a mixture consisting essentially of water, sodium tripolyphosphate, disodium phosphate and a titanium-containing compound at a temperature of from about 65° to about 95° C., and (b) adding said mixture to solid disodium phosphate with mixing whereby a solid titanium phosphate composition is obtained.
Claim 3
Dependent Claim
48 words
The method of claim 1 wherein the mixture in step (a) is prepared from about 25 to about 35 parts of water, about 12 to 25 parts of sodium tripolyphospate, about 25 to 50 parts of disodium phosphate, and about 0.02 to 10 parts of the titanium compound.
Claim 4
Dependent Claim
26 words
The method of claim 2 wherein the mixture is added to sufficient solid disodium phosphate to form a solid titanium phosphate composition containing about 15% water.
Claim 5
Dependent Claim
13 words
The method of claim 1 wherein the titainum-containing compound is a titanium halide.
Claim 6
Dependent Claim
13 words
The method of claim 4 wherein the titanium halide is a titanium fluoride.
Claim 7
Dependent Claim
14 words
The method of claim 5 wherein the titanium fluoride compound is titanium potassium fluoride.
Claim 8
Dependent Claim
37 words
The method of claim 1 wherein the amounts of tripolyphoshate and disodium phosphate included in the mixture prepared in step (a) are sufficient to form a mixture having a pH of from about 6.5 to about 8.
Claim 9
Dependent Claim
50 words
The method of claim 1 wherein the amounts of sodium tripolyphosphate and disodium phosphate used to prepare the mixture of step (a) are sufficient to provide a solid titanium phosphate composition which, when dissolved in deionized water, produces aqueous solutions having a pH of from about 7.0 to about 8.
Claim 10
Dependent Claim
27 words
The method of claim 1 wherein the solid titanium phosphate composition obtained in step (b) contains about 0.005% to 2% of titanium based on the combined weight.
Claim 11
Dependent Claim
13 words
The titanium-containing phosphate composition prepared in accordance with the method of claim 1.
Claim 12
Dependent Claim
59 words
A method of treating surfaces of ferrous, zinc or aluminum metal and alloys thereof to produce phosphate coatings thereon which comprises contacting said surfaces with an aqueous solution comprising a titanium-containing phosphate composition prepared in accordance with the method of claim 1 and thereafter contacting said surface with an aqueous acidic phosphate solution to form a phosphate coating thereon.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-04-30 | 1982-10-30 | 1983-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-30 | 1986-10-30 | 1987-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-30 | 1990-10-30 | 1991-05-01 | $7700.00 | Window Closed / Lapsed |