US4042554A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of a storage stable mastic adhesive
Assignee: EIDP Inc
•
Filing: 1975-09-03
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Granted: 1977-08-16
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Expires: 1995-09-03
Abstract
Abstract Storage stable mastic adhesive is produced by blending a neoprene latex having a gel content of at least 60% and a neoprene latex in which the polymer is at least almost completely soluble in toluene and mixing the blend with an organic water-immiscible solvent for neoprene until a water-in-oil type dispersion is obtained. The viscosity and/or storage stability of the mastic can be further increased by the addition of water to the mastic.
Inventors
- 👤 Ralph Leroy Poskitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:05
CPC Classifications
C; C09; C09J; C09J111/00; C08; C08L; C08L2666/00; C08L2666/02; C08L2666/04; C08L2666/08
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
163 words
A process for the preparation of a mastic adhesive having improved storage stability which comprises (A) blending a high solids content polychloroprene latex having toluene-insoluble gel content of at least 60% and a polychloroprene latex in which the polymer is at least almost completely soluble in toluene, the polychloroprene of the latex which is at least almost completely soluble in toluene having a Mooney viscosity (ML -- 21/2, 100° C.) of 30 to 45, the ratio of polychloroprene from latex which is at least almost completely soluble in toluene to the ratio of polychloroprene from latex that has a toluene insoluble gel content of at least 60% being from 60/40 to 40/60, to form blend having a solids content of between about 50 and 65% by weight, (B) mixing said blend with an organic water-immiscible polychloroprene solvent containing an inert filler and dissolved adhesion promoting resin until the mixture has increased in viscosity to the mastic range and a water-in-oil dispersion is obtained.
Claim 2
Dependent Claim
163 words
A process for the preparation of a mastic adhesive having improved storage stability which comprises (A) blending a high solids content polychloroprene latex having toluene-insoluble gel content of at least 60% and a polychloroprene latex in which the polymer is at least almost completely soluble in toluene, the polychloroprene of the latex which is at least almost completely soluble in toluene having a Mooney viscosity (ML -- 21/2, 100° C.) of 30 to 45, the ratio of polychloroprene from latex which is at least almost completely soluble in toluene to the ratio of polychloroprene from latex that has a toluene insoluble gel content of at least 60% being from 60/40 to 40/60, to form blend having a solids content of between about 50 and 65% by weight, (B) mixing said blend with an organic water-immiscible polychloroprene solvent containing an inert filler and dissolved adhesion promoting resin until the mixture has increased in viscosity to the mastic range and a water-in-oil dispersion is obtained.
Claim 3
Dependent Claim
34 words
The process of claim 1 in which the amount of organic water-immiscible polychloroprene solvent mixed with the blend is at least equal on a weight basis to the amount of neoprene in the blend.
Claim 4
Dependent Claim
33 words
The process of claim 2 in which the amount of organic water-immiscible solvent is chosen so that the total solids content of the mastic composition is between 15 and 80 parts by weight.
Claim 5
Dependent Claim
33 words
The process of claim 1 which includes the additional step of adding water to the water-in-oil dispersion to increase the viscosity of the mastic and/or increase the storage stability of the mastic adhesive.
Claim 6
Dependent Claim
28 words
The process of claim 4 in which the amount of water added to the water-in-oil dispersion is about 5 to 30 parts per 100 parts of said dispersion.
Claim 7
Dependent Claim
26 words
The process of claim 1 in which a cationic or amphoteric surfactant is present at the time the blend and the organic water-immiscible solvent are mixed.
Claim 8
Dependent Claim
32 words
The process of claim 6 in which the organic water-immiscible solvent contains between 10 and 200 parts by weight of adhesion promoting resin per 100 parts of polychloroprene contained in the latex.
Claim 9
Dependent Claim
30 words
The process of claim 7 in which the organic water-immiscible solvent contains between about 50 and 300 parts of inert filler per 100 parts of polychloroprene contained in the latex.
Claim 10
Dependent Claim
11 words
The process of claim 8 in which the filler is bentonite.
Claim 11
Dependent Claim
20 words
The process of claim 6 in which the surfactant is a mixture of polyoxyethylated fatty amine and polyoxyethylated sorbitol oleate.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-08-15 | 1981-02-14 | 1981-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-15 | 1985-02-14 | 1985-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-15 | 1989-02-14 | 1989-08-16 | $7700.00 | Window Closed / Lapsed |