Patent US3787785A successfully refreshed from Google Patents.
Patent US3968285A successfully refreshed from Google Patents.
US3968285A
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US
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One-part foamable latex composition
Assignee: General Latex and Chemical Corp
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Filing: 1974-02-04
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Granted: 1976-07-06
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Expires: 1994-02-04
Abstract
Abstract A one-part foamable latex composition, the method of preparing the composition, and the foams prepared therefrom, which composition comprises a natural or synthetic latex or blends, ammonia, a curing system, and an ammonia-retardant accelerator, such as zinc dibenzyl dithio carbamate accelerator, the latex having a total solids content of from about 55% to 85% by weight. The latex composition is capable of being stored for a long period of time without gellation or precure prior to use, and of being foamed without the addition of other components.
Inventors
- 👤 Perley A. Coffin
- 👤 Philip G. Cook
- 👤 Paul D. Demerjian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:23
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/30; C08L; C08L21/00; C08L21/02; D; D06; D06N; D06N3/00; D06N3/04; D06N3/10; D06N7/00; D06N7/0063; D06N7/0071; D06N7/0073; C08J2321/00; D06N2205/00; D06N2205/04; D06N2205/045; D06N2205/20; Y; Y10; Y10T; Y10T428/00; Y10T428/23907; Y10T428/23979
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
127 words
A one-part foamable latex composition which may be stored for extended periods of time, which latex composition comprises: a. a natural or synthetic elastomeric latex subject to cure; b. a curing system which comprises an ammonia-retardent dithiocarbamate accelerating agent, which agent is inhibited in accelerating function in the presence of the base; c. a volatile nitrogen-containing base in an amount sufficient to inhibit the cure of the latex; d. a foaming agent in an amount to permit mechanical frothing of the latex composition into a foam; and e. the composition characterized by having a total solids content of from about 65% to 85% by weight, and the composition being free of a gelling agent capable of gelling the composition in storage, and free of a heat-sensitizing agent.
Claim 2
Dependent Claim
127 words
A one-part foamable latex composition which may be stored for extended periods of time, which latex composition comprises: a. a natural or synthetic elastomeric latex subject to cure; b. a curing system which comprises an ammonia-retardent dithiocarbamate accelerating agent, which agent is inhibited in accelerating function in the presence of the base; c. a volatile nitrogen-containing base in an amount sufficient to inhibit the cure of the latex; d. a foaming agent in an amount to permit mechanical frothing of the latex composition into a foam; and e. the composition characterized by having a total solids content of from about 65% to 85% by weight, and the composition being free of a gelling agent capable of gelling the composition in storage, and free of a heat-sensitizing agent.
Claim 3
Dependent Claim
15 words
The latex composition of claim 1 wherein the latex is a synthetic diene elastomeric polymer.
Claim 4
Dependent Claim
24 words
The latex composition of claim 1 wherein the polymeric latex is a natural rubber, a styrene-butadiene elastomer, a carboxylated styrene-butadiene elastomer and blends thereof.
Claim 5
Dependent Claim
19 words
The latex composition of claim 1 wherein the total solids content is from about 70 to 80% by weight.
Claim 6
Dependent Claim
13 words
The latex composition of claim 1 wherein the accelerator is zinc dibenzyl thiocarbamate.
Claim 7
Dependent Claim
27 words
The latex composition of claim 1 wherein the accelerator is present in an amount of from about 0.25 to 5.0 parts per hundred parts of the elastomer.
Claim 8
Dependent Claim
31 words
The latex composition of claim 1 wherein the base is present in an amount of from about 0.2 to 3.0 parts (dry weight theoretical basis) per hundred parts of the elastomer.
Claim 9
Dependent Claim
19 words
The latex composition of claim 1 wherein the accelerating agent is a polyvalent heavy metal salt dibenzyl dithio carbamate.
Claim 10
Dependent Claim
12 words
The latex composition of claim 1 wherein the volatile base is ammonia.
Claim 11
Dependent Claim
132 words
A one-part foamable latex composition which comprises in admixture: a. a natural or synthetic diene conjugated elastomeric latex or blends thereof; b. a curing system which comprises zinc dibenzyl dithio carbamate accelerator in an amount of from about 0.25 to 5.0 parts per hundred parts of the elastomer; c. a foaming agent capable of permitting the composition to be prepared as a foam by mechanically beating in a gas; d. ammonia in an amount of from about 0.2 to 3.0 parts (dry weight theoretical basis) per hundred parts of the elastomer; and e. the composition characterized by a total solids content of from about 65 to 80% by weight and being free of gelling agents which would destroy the foaming agent and induce precure in storage and free of a heat-sensitizing agent.
Claim 12
Dependent Claim
132 words
A one-part foamable latex composition which comprises in admixture: a. a natural or synthetic diene conjugated elastomeric latex or blends thereof; b. a curing system which comprises zinc dibenzyl dithio carbamate accelerator in an amount of from about 0.25 to 5.0 parts per hundred parts of the elastomer; c. a foaming agent capable of permitting the composition to be prepared as a foam by mechanically beating in a gas; d. ammonia in an amount of from about 0.2 to 3.0 parts (dry weight theoretical basis) per hundred parts of the elastomer; and e. the composition characterized by a total solids content of from about 65 to 80% by weight and being free of gelling agents which would destroy the foaming agent and induce precure in storage and free of a heat-sensitizing agent.
Claim 13
Dependent Claim
14 words
The latex composition of claim 10 wherein the elastomer is a styrene-butadiene elastomeric copolymer.
Claim 14
Dependent Claim
149 words
In a process for producing a foamable latex composition, which latex composition comprises: a. a natural or synthetic elastomeric latex subject to cure; b. a curing system; and c. a volatile base in an amount sufficient to inhibit the cure of the latex, the base capable of being removed by heating, the composition being free of a gelling agent, the improvement which comprises: incorporating an ammonia-retardant di thio carbamate accelerating agent into the latex, which agent is inhibited in an accelerating function in the presence of the volatile base, and a foaming agent in an amount to permit mechanical frothing of the latex composition into a foam, and the composition characterized by a total solids content of from about 65% to 85% by weight, and free of a heat-sensitizing agent, thereby providing a one-part foamable latex composition which may be stored for extended periods of time prior to use.
Claim 15
Dependent Claim
149 words
In a process for producing a foamable latex composition, which latex composition comprises: a. a natural or synthetic elastomeric latex subject to cure; b. a curing system; and c. a volatile base in an amount sufficient to inhibit the cure of the latex, the base capable of being removed by heating, the composition being free of a gelling agent, the improvement which comprises: incorporating an ammonia-retardant di thio carbamate accelerating agent into the latex, which agent is inhibited in an accelerating function in the presence of the volatile base, and a foaming agent in an amount to permit mechanical frothing of the latex composition into a foam, and the composition characterized by a total solids content of from about 65% to 85% by weight, and free of a heat-sensitizing agent, thereby providing a one-part foamable latex composition which may be stored for extended periods of time prior to use.
Claim 16
Dependent Claim
14 words
The process of claim 12 wherein the latex is a synthetic diene elastomeric polymer.
Claim 17
Dependent Claim
19 words
The process of claim 12 wherein the polymeric latex is a natural rubber, a styrene-butadiene elastomer, and blends thereof.
Claim 18
Dependent Claim
18 words
The process of claim 12 wherein the total solids content is from about 70% to 80% by weight.
Claim 19
Dependent Claim
13 words
The process of claim 12 wherein the accelerator is zinc dibenzyl dithio carbamate.
Claim 20
Dependent Claim
26 words
The process of claim 12 wherein the accelerator is present in an amount of from about 0.25 to 5.0 parts per hundred parts of the elastomer.
Claim 21
Dependent Claim
33 words
The process of claim 12 wherein the base is ammonia and is present in an amount of from about 0.2 to 3.0 parts (dry weight theoretical basis) per hundred parts of the elastomer.
Claim 22
Dependent Claim
20 words
The process of claim 12 which includes curing the latex composition by heating the composition and evaporating the base therefrom.
Claim 23
Dependent Claim
43 words
The process of claim 12 which includes foaming the composition by mechanically beating air into the latex composition to form a froth, and heating the froth to evaporate the volatile base and dry and cure the elastomer, thereby providing a cured foam product.
Claim 24
Dependent Claim
24 words
The process of claim 20 which includes applying the froth to the back of a tufted rug prior to heating and curing the froth.
Claim 25
Dependent Claim
18 words
The process of claim 12 wherein the accelerating agent is a polyvalent heavy metal salt dibenzyl dithio carbamate.
Claim 26
Dependent Claim
160 words
In a process for producing a foamable latex composition, which latex composition comprises: a. a natural or synthetic elastomeric latex subject to cure; b. a curing system; and c. a volatile base in an amount sufficient to inhibit the cure of the latex, the base capable of being removed by heating, the composition being free of a gelling agent, the improvement which comprises: incorporating into the latex from about 0.25 to 5.0 parts per hundred parts of the elastomer of zinc dibenzyl dithio carbamate as an ammonia-retardant accelerating agent, and wherein the volatile base is ammonia present in an amount of from about 0.2 to 3.0 parts (dry weight theoretical) per hundred parts of the elastomer, the latex includes a foaming agent, and the composition is further characterized by a total solids content of from about 65% to 80% by weight, and free of gelling agents which induce gelling during storage of the composition and free of a heat-sensitizing agent.
Claim 27
Dependent Claim
160 words
In a process for producing a foamable latex composition, which latex composition comprises: a. a natural or synthetic elastomeric latex subject to cure; b. a curing system; and c. a volatile base in an amount sufficient to inhibit the cure of the latex, the base capable of being removed by heating, the composition being free of a gelling agent, the improvement which comprises: incorporating into the latex from about 0.25 to 5.0 parts per hundred parts of the elastomer of zinc dibenzyl dithio carbamate as an ammonia-retardant accelerating agent, and wherein the volatile base is ammonia present in an amount of from about 0.2 to 3.0 parts (dry weight theoretical) per hundred parts of the elastomer, the latex includes a foaming agent, and the composition is further characterized by a total solids content of from about 65% to 80% by weight, and free of gelling agents which induce gelling during storage of the composition and free of a heat-sensitizing agent.
Claim 28
Dependent Claim
48 words
The process of claim 23 which includes: a. foaming the latex by mechanically beating air into the latex composition to form a froth; b. applying the froth to a substrate; and c. heating the froth to a temperature to drive off the ammonia and to cure the latex.
Claim 29
Dependent Claim
17 words
The process of claim 23 which includes applying the froth to the back of a tufted rug.
References Cited (Backward Citations)
US2519887A
Cited
GB862114A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-07-06 | 1980-01-05 | 1980-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-06 | 1984-01-05 | 1984-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-06 | 1988-01-05 | 1988-07-06 | $7700.00 | Window Closed / Lapsed |