US4011253A
Expired / Lapsed
US
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Process for the production of silicic acrylate compounds and resinous products
Assignee: Individual
•
Filing: 1976-07-09
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Granted: 1977-03-08
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Expires: 1996-07-09
Abstract
Abstract A dry granular alkali metal silicate is chemically reacted with a concentrated mineral acid or an acid hydrogen containing salt to produce a white granular silicic acid compound which will react chemically with an acrylic compound by using an alkaline compound as a catalyst, and by heating the mixture. The silicic acrylate compound is then polymerized with a catalyst such as a peroxide initiator.
Inventors
- 👤 David H. Blount
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:50
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/025; C08; C08F; C08F290/00; C08F290/08; C08F290/14; C08F290/148; C08F299/00; C08F299/02; C08F299/08; C08F30/00; C08F30/04; C08F30/08
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
188 words
The process for the production of silicic acrylate compounds and resinous products by the following steps: (a) adding about 100 parts by weight of dry granular alkali metal metasilicate slowly to 50 parts by weight of concentrated sulfuric acid (60-98% acid) (b) agitating said mixture to keep the temperature below 100° C and oxygen evolves from the mixture, thereby (c) producing a white granular mixture of a silicic acid compound and alkali metal sulfate; (d) washing said mixture with water, then filtering the mixture to remove the alkali metal sulfate and then air drying at 25° to 75° C., leaving a fine white granular silicic acid compound; (e) mixing about 50 parts by weight of said silicic acid compound with about 30 to 95 parts by weight of an acrylic acid compound; (f) adding an alkali catalyst in the ratio of 1% to 10% by weight of the silicic acid compound and acrylic acid compound; (g) heating the said mixture to just below the boiling point of the acrylic acid compound while agitating for about 20 to 60 minutes, thereby (h) producing a tan granular silicic acrylate compound.
Claim 2
Dependent Claim
188 words
The process for the production of silicic acrylate compounds and resinous products by the following steps: (a) adding about 100 parts by weight of dry granular alkali metal metasilicate slowly to 50 parts by weight of concentrated sulfuric acid (60-98% acid) (b) agitating said mixture to keep the temperature below 100° C and oxygen evolves from the mixture, thereby (c) producing a white granular mixture of a silicic acid compound and alkali metal sulfate; (d) washing said mixture with water, then filtering the mixture to remove the alkali metal sulfate and then air drying at 25° to 75° C., leaving a fine white granular silicic acid compound; (e) mixing about 50 parts by weight of said silicic acid compound with about 30 to 95 parts by weight of an acrylic acid compound; (f) adding an alkali catalyst in the ratio of 1% to 10% by weight of the silicic acid compound and acrylic acid compound; (g) heating the said mixture to just below the boiling point of the acrylic acid compound while agitating for about 20 to 60 minutes, thereby (h) producing a tan granular silicic acrylate compound.
Claim 3
Dependent Claim
52 words
The process according to claim 1, further including the steps of adding a catalytic amount of a peroxide initiator to said silicic acrylate compound; heating said mixture to a temperature of from about 30° to 120° C while agitating for at least about 10 minutes, whereby a poly(silicic acrylate) polymer is produced.
Claim 4
Dependent Claim
23 words
The process according to claim 1 wherein the dry alkali metasilicate is selected from the group consisting of sodium metasilicate and potassium metasilicate.
Claim 5
Dependent Claim
34 words
The process according to claim 1 wherein the acrylic acid compound is selected from the group consisting of acrylic acid, methacrylic acid, ethyl acrylic acid, benzyl acrylic acid, chloroacrylic acid and cyclohexyl acrylic acid.
Claim 6
Dependent Claim
30 words
The process according to claim 1 wherein the alkali catalyst is selected from the group consisting of sodium carbonate, potassium carbonate, sodium hydroxide, potassium hydroxide, sodium acrylate and sodium silicate.
Claim 7
Dependent Claim
36 words
The process according to claim 2 wherein the peroxide initiator is selected from the group consisting of hydrogen peroxide, potassium persulfate, ammonium persulfate, cumene hydroperoxide benzoyl peroxide, ethyl ketone peroxide with cobalt naphthenate and o-menthane hydroperoxide.
Claim 8
Dependent Claim
74 words
The process according to claim 2 wherein the peroxide initiator is potassium persulfate, 0.5 to 1.5 parts by weight, and ferric sulfate, 0.01 to 0.02 parts by weight carbonate 100 parts by weight of the silicic acrylate compound; the reaction takes place in an aqueous solution of 200 to 400 parts other weight of water and is agitated for 30 to 80 minutes, thereby producing an aqueous emulsion of the poly(silicic acrylate) polymer. acid
Claim 9
Dependent Claim
58 words
The process according to claim 2 wherein the peroxide initiator is utilized in a redox system, consisting of 200 to 400 parts water, 1 to 3 parts ammonium persulfate, about 0.01 parts cupric sulfate and about 1 to 2 parts sodium thiosulfate per 100 parts of the silicic acrylate compound; the mixture is agitated for about 60 minutes.
Claim 10
Dependent Claim
34 words
The process according to claim 6 wherein an additional step of adding dilute hydrochloric acid to the poly(silicic acrylate) polymer until the pH is about 6 to 7, thereby precipitating the poly(silicic acrylate) polymer.
References Cited (Backward Citations)
US3674430A
Cited
US3826814A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-03-07 | 1980-09-06 | 1981-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-07 | 1984-09-06 | 1985-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-07 | 1988-09-06 | 1989-03-08 | $7700.00 | Window Closed / Lapsed |