US4251416A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carpet backing adhesive
Assignee: United States Gypsum Co
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Filing: 1979-11-21
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Granted: 1981-02-17
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Expires: 1999-11-21
Abstract
Abstract The coagulation of a styrene butadiene latex emulsion which normally occurs upon the introduction of gypsum as a filler in the preparation of an adhesive composition is prevented by the addition of ammonium sulfate or sodium sulfate or a mixture of the two to the emulsion prior to the addition of the gypsum.
Inventors
- 👤 Jay W. Palmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:02
CPC Classifications
C; C09; C09J; C09J109/00; C09J109/06; C09J109/08; D; D06; D06N; D06N3/00; D06N3/04; D06N3/10; C08; C08K; C08K3/00; C08K3/30; Y; Y10; Y10S; Y10S524/00; Y10S524/915; Y10T; Y10T428/00; Y10T428/23907; Y10T428/23979; Y10T428/23993
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
37 words
An adhesive composition comprising an aqueous styrene-butadiene latex emulsion, calcium sulfate dihydrate and from about 0.5% to about 5% by weight of at least one anti-coagulant selected from the class consisting of ammonium sulfate and sodium sulfate.
Claim 2
Dependent Claim
37 words
An adhesive composition comprising an aqueous styrene-butadiene latex emulsion, calcium sulfate dihydrate and from about 0.5% to about 5% by weight of at least one anti-coagulant selected from the class consisting of ammonium sulfate and sodium sulfate.
Claim 3
Dependent Claim
24 words
The composition of claim 1 wherein the calcium sulfate dihydrate is present in an amount ranging from about 50% to about 70% by weight.
Claim 4
Dependent Claim
11 words
The composition of claim 1 wherein the anti-coagulant is ammonium sulfate.
Claim 5
Dependent Claim
11 words
The composition of claim 1 wherein the emulsion is anionically stabilized.
Claim 6
Dependent Claim
12 words
The composition of claim 1 further comprising sodium polyacrylate as a thickener.
Claim 7
Independent Claim
48 words
A method for imparting coagulation resistance to an aqueous styrene-butadiene latex emulsion to which gypsum is to be added, said method comprising mixing at least one anti-coagulant selected from the class consisting of ammonium sulfate and sodium sulfate with said emulsion prior to the addition of the gypsum.
Claim 8
Independent Claim
48 words
A method for imparting coagulation resistance to an aqueous styrene-butadiene latex emulsion to which gypsum is to be added, said method comprising mixing at least one anti-coagulant selected from the class consisting of ammonium sulfate and sodium sulfate with said emulsion prior to the addition of the gypsum.
Claim 9
Dependent Claim
26 words
The method of claim 6 wherein the anti-coagulant is added in an amount ranging from about 0.5% to about 30% by weight of the latex emulsion.
Claim 10
Dependent Claim
14 words
The method of claim 6 or claim 7 wherein the anti-coagulant is ammonium sulfate.
Claim 11
Dependent Claim
15 words
The method of claim 7 wherein the amount ranges from about 1% to about 20%.
Claim 12
Dependent Claim
12 words
The method of claim 8 wherein the emulsion is an anionically stabilized.
Claim 13
Independent Claim
54 words
A method of preparing a carpet backing adhesive comprising mixing an aqueous emulsion of a styrene-butadiene latex with, firstly, from about 0.5% to about 5%, based on the total weight of the adhesive, at least one anti-coagulant selected from the class consisting of ammonium sulfate and sodium sulfate, and secondly gypsum at ambient temperature.
Claim 14
Independent Claim
54 words
A method of preparing a carpet backing adhesive comprising mixing an aqueous emulsion of a styrene-butadiene latex with, firstly, from about 0.5% to about 5%, based on the total weight of the adhesive, at least one anti-coagulant selected from the class consisting of ammonium sulfate and sodium sulfate, and secondly gypsum at ambient temperature.
Claim 15
Dependent Claim
11 words
The method of claim 11 wherein the anti-coagulant is ammonium sulfate.
Claim 16
Dependent Claim
23 words
The method of claim 11 wherein the percentage by weight of anti-coagulant is from about 1% to about 3.5% of the total weight.
Claim 17
Dependent Claim
48 words
A carpet comprising pile yarns anchored into a backing fabric by an adhesive mixture of an aqueous emulsion of a styrene-butadiene latex, gypsum and from about 0.5% to about 5% by weight of at least one anti-coagulant selected from the class consisting of ammonium sulfate and sodium sulfate.
Claim 18
Dependent Claim
48 words
A carpet comprising pile yarns anchored into a backing fabric by an adhesive mixture of an aqueous emulsion of a styrene-butadiene latex, gypsum and from about 0.5% to about 5% by weight of at least one anti-coagulant selected from the class consisting of ammonium sulfate and sodium sulfate.
Claim 19
Dependent Claim
14 words
The carpet of claim 14 wherein the anti-coagulant for the adhesive is ammonium sulfate.
References Cited (Backward Citations)
US2734883A
Cited
US3951900A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-02-17 | 1984-08-18 | 1985-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-17 | 1988-08-18 | 1989-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-17 | 1992-08-18 | 1993-02-17 | $7700.00 | Window Closed / Lapsed |