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US4102808A Expired / Lapsed US ⏱️ 0.0 years remaining

Latex frothing agent

Assignee: BASF SE
•
Filing: 1977-06-01
•
Granted: 1978-07-25
•
Expires: 1997-06-01
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Abstract

Abstract A cellular elastomeric product is prepared by the curing of a froth prepared by whipping air into an aqueous dispersion of colloidal elastomer, said aqueous dispersion containing a latex frothing agent consisting of an aqueous solution containing about 70% water and about 25% magnesium di(lauryl sulfate), about 2.5% polyalkoxyglycerol having about eight alkoxy groups per hydroxyl and about 2.5% of a quaternary, dihydroimidazole derivative, there being a fatty acid carbon chain attached as the only carbon-carbon linkage for the carbon between the two nitrogens of the imidazole ring, the quaternary nitrogen partaking of the nature of a quaternary sodium glycinate having at such quaternary nitrogen both an alkhydroxy group and said dihydroimidazole ring.

Inventors

  • 👤 Daniel Charles Straka

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-29 16:42
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/30; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/03; Y10S516/05; Y10T; Y10T428/00; Y10T428/23907; Y10T428/23979

Claims Analysis

Total Claims: 3
Claim 1
Independent Claim 105 words
A latex frothing agent useful for entraining air in a froth of aqueous latex dispersion of an elastomer, said latex frothing agent consisting essentially of an aqueous solution containing about 70% water and about 25% magnesium di(lauryl sulfate), about 2.5% polyalkoxyglycerol having about eight alkoxy groups per hydroxyl group and about 2.5% of a quaternary dihydroimidazole derivative, there being a fatty acid carbon chain attached as the only carbon-carbon linkage for the carbon between the nitrogens of the dihydroimidazole ring, the quaternary nitrogen partaking of the nature of a quaternary sodium glycinate having at such quaternary nitrogen both an alkhydroxy group and said dihydroimidazole ring.
Claim 2
Dependent Claim 105 words
A latex frothing agent useful for entraining air in a froth of aqueous latex dispersion of an elastomer, said latex frothing agent consisting essentially of an aqueous solution containing about 70% water and about 25% magnesium di(lauryl sulfate), about 2.5% polyalkoxyglycerol having about eight alkoxy groups per hydroxyl group and about 2.5% of a quaternary dihydroimidazole derivative, there being a fatty acid carbon chain attached as the only carbon-carbon linkage for the carbon between the nitrogens of the dihydroimidazole ring, the quaternary nitrogen partaking of the nature of a quaternary sodium glycinate having at such quaternary nitrogen both an alkhydroxy group and said dihydroimidazole ring.
Claim 3
Dependent Claim 21 words
The frothing agent of claim 1 in which the fatty acid chain is the fatty acid chain derived from coconut oil.

References Cited (Backward Citations)

US2307047A Cited
US3422011A Cited
US3577554A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1981-07-24 1982-01-23 1982-07-25 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1985-07-24 1986-01-23 1986-07-25 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1989-07-24 1990-01-23 1990-07-25 $7700.00 Window Closed / Lapsed

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