Patent US4110295A successfully refreshed from Google Patents.
US4110295A
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Storage-stable, moisture curable mixtures containing mercapto-terminated liquid oligomer, liquid polymer or liquid monomer, liquid oligomer and liquid polymer, with sodium chromate
Assignee: Morton International LLC
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Filing: 1976-05-04
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Granted: 1978-08-29
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Expires: 1996-05-04
Abstract
Abstract A process for preparing a mixture capable of hardening when exposed to atmospheric moisture, but stable when stored in the absence of moisture, comprises mixing a liquid monomer, oligomer and polymer, liquid oligomer or liquid polymer having at least one terminal mercapto group with a latent hardener comprised of a paste containing anhydrous Na 2 CrO 4 and a water-soluble solvent, such as dimethyl formamide, dimethyl sulfoxide, methanol, ethanol, glycol, glycerine or dioxane. The resulting mixture is useful as a caulking compound.
Inventors
- 👤 Gerhard Wilhelm
- 👤 Lothar Hockenberger
- 👤 Manfred Soyka
- 👤 Peter Endruscheit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:47
CPC Classifications
C; C08; C08G; C08G75/00; C08G75/14; C08L; C08L81/00; C08L81/04
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
66 words
A process for preparing a mixture capable of hardening when exposed to atmospheric moisture, but stable when stored in the absence of moisture, said process comprising mixing a liquid polymer, a liquid oligomer or a mixture of liquid monomer, oligomer and polymer having at least one terminal mercapto group with a latent hardener comprised of a paste containing anhydrous sodium chromate and a water-soluble organic solvent.
Claim 2
Dependent Claim
66 words
A process for preparing a mixture capable of hardening when exposed to atmospheric moisture, but stable when stored in the absence of moisture, said process comprising mixing a liquid polymer, a liquid oligomer or a mixture of liquid monomer, oligomer and polymer having at least one terminal mercapto group with a latent hardener comprised of a paste containing anhydrous sodium chromate and a water-soluble organic solvent.
Claim 3
Dependent Claim
12 words
Process according to claim 1 wherein said organic solvent is dimethyl formamide.
Claim 4
Dependent Claim
11 words
Process according to claim 1 wherein said organic solvent is methanol.
Claim 5
Dependent Claim
16 words
Process according to claim 1 wherein said polymer is a polysulfide polymer or a thioether polymer.
Claim 6
Dependent Claim
28 words
Process according to claim 1 wherein said mixture contains about 3 to about 12 weight percent Na 2 CrO 4 , related to weight of liquid mercapto-terminated polymer.
Claim 7
Dependent Claim
34 words
Process according to claim 1 wherein said latent hardener contains said Na 2 CrO 4 and said solvent in a weight ratio of Na 2 CrO 4 :solvent of about 1:1 to about 1:2.
Claim 8
Dependent Claim
25 words
Process according to claim 1 wherein said solvent is selected from the group consisting of dimethyl formamide, dimethyl sulfoxide, methanol, ethanol, glycol, glycerin and dioxane.
Claim 9
Dependent Claim
62 words
A mixture capable of hardening when exposed to atmospheric moisture, but stable when stored in the absence of moisture, said mixture comprising a liquid polymer, a liquid oligomer or a mixture of a liquid monomer, oligomer and polymer having at least one terminal mercapto group and a latent hardener comprised of a paste containing anhydrous sodium chromate and a water-soluble organic solvent.
Claim 10
Dependent Claim
62 words
A mixture capable of hardening when exposed to atmospheric moisture, but stable when stored in the absence of moisture, said mixture comprising a liquid polymer, a liquid oligomer or a mixture of a liquid monomer, oligomer and polymer having at least one terminal mercapto group and a latent hardener comprised of a paste containing anhydrous sodium chromate and a water-soluble organic solvent.
Claim 11
Dependent Claim
12 words
Mixture according to claim 8 wherein said organic solvent is dimethyl formamide.
Claim 12
Dependent Claim
11 words
Mixture according to claim 8 wherein said organic solvent is methanol.
Claim 13
Dependent Claim
15 words
Mixture according to claim 8 wherein said polymer is polysulfide polymer or a thioether polymer.
Claim 14
Dependent Claim
27 words
Mixture according to claim 8 wherein said mixture contains about 3 to about 12 weight percent of said sodium chromate, related to weight of liquid mercapto-terminated polymer.
Claim 15
Dependent Claim
29 words
Mixture according to claim 8 wherein said latent hardener contains said sodium chromate and said solvent in a weight ratio of sodium chromate:solvent of about 1:1 to about 1:2.
Claim 16
Dependent Claim
25 words
Mixture according to claim 8 wherein said solvent is selected from the group consisting of dimethyl formamide, dimethyl sulfoxide, methanol, ethanol, glycol, glycerin and dioxane.
Claim 17
Dependent Claim
27 words
Process according to claim 1 wherein said latent hardener is mixed with said mixture of monomer, oligomer and polymer having said at least one terminal mercapto group.
Claim 18
Dependent Claim
21 words
Process according to claim 1 wherein said latent hardener is mixed with said polymer having at least one terminal mercapto group.
Claim 19
Dependent Claim
43 words
Process according to claim 1 wherein said solvent is a non-solvent for said sodium chromate and said mercapto-terminated compound, but is capable of picking up water and transporting water to thereby enable chromate ions from said sodium chromate to form in said water.
Claim 20
Dependent Claim
45 words
Process according to claim 1 wherein said polymer is a polysulfide having the approximate formula: HS(C.sub.2 H.sub.4.O.CH.sub.2.O.C.sub.2 H.sub.4.SS).sub.23.C.sub.2 H.sub.4.O.CH.sub.2.C.sub.2 H.sub.4 SH, said polymer having about 0.5% cross-linking, a mean molecular weight of about 4000 and a viscosity at 27° C. of 350 to 450 poises.
Claim 21
Dependent Claim
45 words
Process according to claim 1 wherein said oligomer is a polysulfide having the approximate formula: HS(C.sub.2 H.sub.4.O.CH.sub.2.O.C.sub.2 H.sub.4.SS).sub.8.C.sub.2 H.sub.4.O.CH.sub.2.O.C.sub.2 H.sub.4 SH, said oligomer having about 2% cross-linking, a mean molecular weight of about 1000 and a viscosity at 27° C. of 7 to 12 poises.
Claim 22
Dependent Claim
43 words
Process according to claim 1 wherein said polymer is a polymercaptan having the approximate formula: ##STR2## wherein R is an aliphatic radical and said polymer has an average molecular weight of about 6000 and a viscosity at 25° C. of about 60 poises.
Claim 23
Dependent Claim
27 words
Mixture according to claim 8 wherein said latent hardener is mixed with said mixture of monomer, oligomer and polymer having said at least one terminal mercapto group.
Claim 24
Dependent Claim
21 words
Mixture according to claim 8 wherein said latent hardener is mixed with said polymer having at least one terminal mercapto group.
Claim 25
Dependent Claim
43 words
Mixture according to claim 8 wherein said solvent is a non-solvent for said sodium chromate and said mercapto-terminated compound, but is capable of picking up water and transporting water to thereby enable chromate ions from said sodium chromate to form in said water.
Claim 26
Dependent Claim
45 words
Mixture according to claim 8 wherein said polymer is a polysulfide having the approximate formula: HS(C.sub.2 H.sub.4.O.CH.sub.2.O.C.sub.2 H.sub.4.SS).sub.23.C.sub.2 H.sub.4.O.CH.sub.2.O.C.sub.2 H.sub.4 SH, said polymer having about 0.5% cross-linking, a mean molecular weight of about 4000 and a viscosity at 27° C. of 350 to 450 poises.
Claim 27
Dependent Claim
45 words
Mixture according to claim 8 wherein said oligomer is a polysulfide having the approximate formula: HS(C.sub.2 H.sub.4.O.CH.sub.2.O.C.sub.2 H.sub.4.SS).sub.8.C.sub.2 H.sub.4.O.CH.sub.2.O.C.sub.2 H.sub.4 SH, said oligomer having about 2% cross-linking, a mean molecular weight of about 1000 and a viscosity at 27° C. of 7 to 12 poises.
Claim 28
Dependent Claim
43 words
Mixture according to claim 1 wherein said polymer is a polymercaptan having the approximate formula: ##STR3## wherein R is an aliphatic radical and said polymer has an average molecular weight of about 6000 and a viscosity at 25° C. of about 60 poises.
References Cited (Backward Citations)
US2466963A
Cited
US3402155A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-08-28 | 1982-02-27 | 1982-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-08-28 | 1986-02-27 | 1986-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-08-28 | 1990-02-27 | 1990-08-29 | $7700.00 | Window Closed / Lapsed |