Patent US3880690A successfully refreshed from Google Patents.
US3880690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of cementable polyvinyl fluoride sheeting
Assignee: Individual
•
Filing: 1972-07-14
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Granted: 1975-04-29
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Expires: 1992-07-14
Abstract
Abstract Improvements in the joining of polyvinyl fluoride shaped articles, particularly film or sheeting, to other materials by means of an intermediate adhesive by using a solution or dispersion of a vinyl fluoride polymer which has been postchlorinated to a chlorine content of 5 to 27 weight percent or a copolymer of vinyl fluoride and vinyl chloride having a vinyl chloride content of 10 to 65 weight percent as the cement.
Inventors
- 👤 Otto Fuchs
- 👤 Gerhard Bier
- 👤 Werner Trautvetter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:08
CPC Classifications
B; B32; B32B; B32B7/00; B32B7/04; B32B7/12; B32B27/00; B32B15/00; B32B15/04; B32B15/08; B32B21/00; B32B21/04; B32B21/08; B32B27/30; B32B27/304; C; C09; C09J; C09J127/00; C09J127/02; C09J127/12; C09J7/00; C09J7/20; C09J7/22; C09J7/30; C09J7/38; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/3154
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
137 words
IN THE PROCESS OF PRODUCING LAMINATED POLYVINYL FLUORIDE FILM OR SHEETING BY SOLVENT OR DISPERSION CASTING OF POLYVINYL FLUORIDE IN FLIM OR SHEETING FORM, REMOVING ONLY A PORTION OF THE SOLVENT OR DISPERSANT THEREFROM TO A RESIDUAL CONTENT OF 0.4 TO 0.8 WT.%, APPLYING A SOLUTION OR DISPERSION OF AN ADHESIVE TO SAID FILM OR SHEETING AND REMOVING SUBSTANTIALLY ALL OF THE SOLVENT AND DISPERSANTS AND, THEREAFTER, LAMINATING THE SO TREATED POLYVINYL FLUORIDE FILM OR SHEETING TO ANOTHER MATERIAL, THE IMPROVEMENT WHICH COMPRISES UTILIZING AS SAID SOLUTION OR DISPERSION OF ADHESIVE A SOLUTION OR DISPERSION OF ADHESIVE CONSISTING ESSENTIALLY OF A POST-CHLORINATED POLYVINYL FLUORIDE HAVING A CHLORINE CONTENT OF 5 TO 27 WT.% OR A SOLUTION OR DISPERSION OF AN ADHESIVE WHICH CONSISTS ESSENTIALLY OF A COPOLYMER OF VINYL FLUORIDE AND 10 TO 65 WT.% VINYL CHLORIDE.
Claim 2
Dependent Claim
137 words
IN THE PROCESS OF PRODUCING LAMINATED POLYVINYL FLUORIDE FILM OR SHEETING BY SOLVENT OR DISPERSION CASTING OF POLYVINYL FLUORIDE IN FLIM OR SHEETING FORM, REMOVING ONLY A PORTION OF THE SOLVENT OR DISPERSANT THEREFROM TO A RESIDUAL CONTENT OF 0.4 TO 0.8 WT.%, APPLYING A SOLUTION OR DISPERSION OF AN ADHESIVE TO SAID FILM OR SHEETING AND REMOVING SUBSTANTIALLY ALL OF THE SOLVENT AND DISPERSANTS AND, THEREAFTER, LAMINATING THE SO TREATED POLYVINYL FLUORIDE FILM OR SHEETING TO ANOTHER MATERIAL, THE IMPROVEMENT WHICH COMPRISES UTILIZING AS SAID SOLUTION OR DISPERSION OF ADHESIVE A SOLUTION OR DISPERSION OF ADHESIVE CONSISTING ESSENTIALLY OF A POST-CHLORINATED POLYVINYL FLUORIDE HAVING A CHLORINE CONTENT OF 5 TO 27 WT.% OR A SOLUTION OR DISPERSION OF AN ADHESIVE WHICH CONSISTS ESSENTIALLY OF A COPOLYMER OF VINYL FLUORIDE AND 10 TO 65 WT.% VINYL CHLORIDE.
Claim 3
Dependent Claim
27 words
The process of claim 1 wherein a solution or dispersion of a post chlorinated polyvinyl fluoride having a chlorine content of 5 to 27 wt.% is employed.
Claim 4
Dependent Claim
26 words
A process according to claim 1 wherein a solution or dispersion of a copolymer of vinyl fluoride and 10 to 65 wt.% vinyl chloride is employed.
Claim 5
Dependent Claim
20 words
The improved process claimed in claim 1, including providing an adhesive between said other material and said chlorine containing surface.
Claim 6
Dependent Claim
17 words
The improved process claimed in claim 1, including removing solvent by heating to about 240* to 260*C.
References Cited (Backward Citations)
US2774704A
Cited
US2852811A
Cited
US3133854A
Cited
US3325344A
Cited
US3558582A
Cited
US3579370A
Cited
US3723171A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-28 | 1978-10-28 | 1979-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-28 | 1982-10-28 | 1983-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-28 | 1986-10-28 | 1987-04-29 | $7700.00 | Window Closed / Lapsed |