US3878154A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mastics derived from neoprene latex
Assignee: EIDP Inc
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Filing: 1973-10-30
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Granted: 1975-04-15
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Expires: 1993-10-30
Abstract
Abstract Mastics having excellent adhesive properties are produced by mixing a directly prepared neoprene aqueous emulsion containing 50-65 percent solids by weight and an organic, water-immiscible neoprene solvent containing a dispersed (dissolved) adhesion promoting resin in the presence of an amphoteric or cationic surfactant until the viscosity of the mixture has increased into the mastic range and a water-in-oil type of dispersion is obtained.
Inventors
- 👤 Robert William Keown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:13
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/17; C08L; C08L11/00; C09; C09D; C09D5/00; C09D5/34; C08L57/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
62 words
IN A PROCESS FOR PRODUCING A MASTIC ADHESIVE THE STEP COMPRISING MIXING A DIRECTLY PREPARED AQUEOUS EMULSION OF NEOPRENE CONTAINING 50-65 PERCENT BY WEIGHT SOLIDS WITH AN ORGANIC WATER-IMMISCIBLE NEOPRENE SOLVENT CONTAINING DISSLVED ADHERSION-PROMOTING RESIN IN THE PRESENCE OF A CATIONIC OR AMPHOTERIC SURFACTANT UNITL THE MIXTURE HAS INCREASED IN VISCOSITY TO THE MASTIC RANGE AND A WATER-IN-OIL TYPE DISPERSION IN OBTAINED.
Claim 2
Dependent Claim
62 words
IN A PROCESS FOR PRODUCING A MASTIC ADHESIVE THE STEP COMPRISING MIXING A DIRECTLY PREPARED AQUEOUS EMULSION OF NEOPRENE CONTAINING 50-65 PERCENT BY WEIGHT SOLIDS WITH AN ORGANIC WATER-IMMISCIBLE NEOPRENE SOLVENT CONTAINING DISSLVED ADHERSION-PROMOTING RESIN IN THE PRESENCE OF A CATIONIC OR AMPHOTERIC SURFACTANT UNITL THE MIXTURE HAS INCREASED IN VISCOSITY TO THE MASTIC RANGE AND A WATER-IN-OIL TYPE DISPERSION IN OBTAINED.
Claim 3
Dependent Claim
44 words
The process of claim 1 in which the surfactant is amphoteric or a polyoxyethylated alkyl amine and the surfactant is dissolved in either the aqueous emulsion of neoprene or in the organic water-immiscible neoprene solvent before the mixing of the emulsion and the solvent.
Claim 4
Dependent Claim
30 words
The process of claim 1 in which the surfactant is cationic and it iS dissolved in the organic water-immiscible neoprene solvent before the mixing of the emulsion and the solvent.
Claim 5
Dependent Claim
68 words
In a process for producing a neoprene latex composition especially adapted for use in making mastics having excellent adhesive properties, the step comprising mixing directly into an aqueous emulsion of directly prepared neoprene latex containing 50-65 percent solids an amphoteric surfactant or a polyoxyethylated alkyl amine surfactant until the surfactant is dispersed in the latex, the proportion of surfactant being from 0.25-10 parts per 100 parts of neoprene.
Claim 6
Dependent Claim
68 words
In a process for producing a neoprene latex composition especially adapted for use in making mastics having excellent adhesive properties, the step comprising mixing directly into an aqueous emulsion of directly prepared neoprene latex containing 50-65 percent solids an amphoteric surfactant or a polyoxyethylated alkyl amine surfactant until the surfactant is dispersed in the latex, the proportion of surfactant being from 0.25-10 parts per 100 parts of neoprene.
Claim 7
Dependent Claim
15 words
A process of claim 4 in which the amphoteric surfactant is a polyoxyethylated fatty amine.
Claim 8
Dependent Claim
20 words
A process of claim 5 in which there is present with the polyoxyethylated fatty amine surfactant a polyoxyethylated sorbitol oleate.
Claim 9
Dependent Claim
11 words
A neoprene latex composition produced by a process of claim 4.
Claim 10
Dependent Claim
20 words
A neoprene latex composition produced by a process of claim 4 wherein the amphoteric surfactant is a polyoxyethylated fatty amine.
Claim 11
Dependent Claim
43 words
A neoprene latex composition of claim 8 in which there is present with the polyoxyethylated fatty amine a polyoxyethylated sorbitol oleate, said fatty amine and sorbitol oleate together being present in the proportion of about 3 parts per 100 parts of latex solids.
Claim 12
Dependent Claim
27 words
The process of claim 1 in which the amount of organic water-immiscible neoprene solvent is at least equal on a weight basis to the amount of neoprene.
References Cited (Backward Citations)
US2809948A
Cited
US3479313A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |