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US5571316A
Expired / Lapsed
US
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Silicate-dextrin adhesive compositions
Assignee: PQ Corp
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Filing: 1996-02-28
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Granted: 1996-11-05
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Expires: 2016-02-28
Abstract
Abstract An adhesive composition comprising (in percent by weight) from about 0.05 to about 0.50% of sodium silicate, from about 10 to about 47% of dextrin, from about 17 to about 70% of an alkali metal silicate, from about 0.05 to about 0.50% of sodium metaborate octahydrate or sodium metaborate tetrahydrate, and from about 18.0 to about 62.0% water and a process for preparing the same. The adhesive composition is useful in the manufacture of paper products, such as, paper tubes, corrugated boards and corner boards.
Inventors
- 👤 Petra Gill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:51
CPC Classifications
C; C09; C09J; C09J103/00; C09J103/02; C08; C08L; C08L2666/00; C08L2666/54
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
64 words
An adhesive composition comprising: (a) from about 0.05 to about 0.50% w/w of sodium metasilicate; (b) from about 10 to about 47% w/w of dextrin; (c) from about 17 to about 70% w/w of an alkali metal silicate; (d) from about 0.05 to about 0.50% w/w of sodium metaborate octahydrate or sodium metaborate tetrahydrate; and (e) from about 18.0 to about 62.0% w/w water.
Claim 2
Dependent Claim
64 words
An adhesive composition comprising: (a) from about 0.05 to about 0.50% w/w of sodium metasilicate; (b) from about 10 to about 47% w/w of dextrin; (c) from about 17 to about 70% w/w of an alkali metal silicate; (d) from about 0.05 to about 0.50% w/w of sodium metaborate octahydrate or sodium metaborate tetrahydrate; and (e) from about 18.0 to about 62.0% w/w water.
Claim 3
Dependent Claim
27 words
The composition of claim 1 comprising: 0.5% w/w sodium metasilicate; 21% w/w dextrin; 58% w/w alkali metal silicate; 0.5% w/w sodium metaborate octahydrate; and 21% w/w water.
Claim 4
Dependent Claim
13 words
The composition of claim 1 wherein said alkali metal silicate is sodium silicate.
Claim 5
Dependent Claim
13 words
The composition of claim 1 wherein said alkali metal silicate is potassium silicate.
Claim 6
Dependent Claim
107 words
The process of making an adhesive composition comprising: (a) adding from about 0.05 to about 0.50% w/w of sodium metasilicate to from about 18.0 to about 62.0% w/w water, while vigorously stirring, to obtain a solution of the sodium metasilicate; (b) adding with continuous stirring from about 10 to about 47% w/w dextrin to obtain a solution of sodium metasilicate/dextrin; (c) adding with continuous stirring from about 17 to about 70% w/w of an alkali metal silicate to obtain a solution of sodium metasilicate/dextrin/alkali metal silicate; and (d) adding with continuous stirring from about 0.05 to about 0.5% w/w of sodium metaborate octahydrate or sodium metaborate tetrahydrate.
Claim 7
Dependent Claim
107 words
The process of making an adhesive composition comprising: (a) adding from about 0.05 to about 0.50% w/w of sodium metasilicate to from about 18.0 to about 62.0% w/w water, while vigorously stirring, to obtain a solution of the sodium metasilicate; (b) adding with continuous stirring from about 10 to about 47% w/w dextrin to obtain a solution of sodium metasilicate/dextrin; (c) adding with continuous stirring from about 17 to about 70% w/w of an alkali metal silicate to obtain a solution of sodium metasilicate/dextrin/alkali metal silicate; and (d) adding with continuous stirring from about 0.05 to about 0.5% w/w of sodium metaborate octahydrate or sodium metaborate tetrahydrate.
Claim 8
Dependent Claim
13 words
The process of claim 5 wherein said alkali metal silicate is sodium silicate.
Claim 9
Dependent Claim
13 words
The process of claim 5 wherein said alkali metal silicate is potassium silicate.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-11-05 | 2000-05-06 | 2000-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-11-05 | 2004-05-06 | 2004-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-11-05 | 2008-05-06 | 2008-11-05 | $7700.00 | Window Closed / Lapsed |