US4515744A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vinyl chloride polymer laminate
Assignee: Omnova Services Inc
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Filing: 1983-07-28
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Granted: 1985-05-07
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Expires: 2003-07-28
Abstract
Abstract A laminate comprises fused adherent layers of plastisol vinyl chloride polymer resins in which a first layer contains Sb 2 O 3 and a second layer contains TiO 2 . The flexible laminate is useful as a roofing membrane for the roof of a building wherein the layer containing the Sb 2 O 3 is adjacent a structural or insulation member of the roof of the building while the TiO 2 layer can be exposed to the elements and can protect the Sb 2 O 3 layer from sunlight.
Inventors
- 👤 Richard W. Stamper
- 👤 Robert C. Hultz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:27
CPC Classifications
E; E04; E04D; E04D5/00; E04D5/10; Y; Y10; Y10S; Y10S264/00; Y10S264/60
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
150 words
The method which comprises coating on a release substrate: (A) a first layer having a thickness of from about 12 to 50 mils and of a compounded and stabilized vinyl chloride polymer plastisol composition containing antimony trioxide and being free of a curing agent and of a blowing agent and gelling said layer at a temperature of from about 170° to 250° F. and (B) casting on the gelled layer of (A) a second layer having a thickness of from about 12 to 50 mils and of a compounded and stabilized vinyl chloride polymer plastisol composition containing titanium dioxide and being free of a curing agent and of a blowing agent and heating said layers at a temperature of from about 250° to 400° F. for from about one to five minutes to fuse said layers and to adhere said layers together to obtain a flexible vinyl chloride polymer laminate.
Claim 2
Independent Claim
150 words
The method which comprises coating on a release substrate: (A) a first layer having a thickness of from about 12 to 50 mils and of a compounded and stabilized vinyl chloride polymer plastisol composition containing antimony trioxide and being free of a curing agent and of a blowing agent and gelling said layer at a temperature of from about 170° to 250° F. and (B) casting on the gelled layer of (A) a second layer having a thickness of from about 12 to 50 mils and of a compounded and stabilized vinyl chloride polymer plastisol composition containing titanium dioxide and being free of a curing agent and of a blowing agent and heating said layers at a temperature of from about 250° to 400° F. for from about one to five minutes to fuse said layers and to adhere said layers together to obtain a flexible vinyl chloride polymer laminate.
Claim 3
Dependent Claim
119 words
The method according to claim 1 in which in each of said layers (A) and (B) the vinyl chloride polymer is homopolyvinyl chloride, in which in each of said layers (A) and (B) the amount of plasticizer is from about 50 to 80 parts by weight per 100 parts by weight total of vinyl chloride polymer, wherein said antimony trioxide is used in an amount of from about 2 to 6 parts by weight per 100 parts by weight of the total vinyl chloride polymer in A and wherein said titanium dioxide is used in an amount of from about 2 to 8 parts by weight per 100 parts by weight of the total vinyl chloride polymer in B.
Claim 4
Dependent Claim
23 words
The method according to claim 2 wherein each layer contains effective amounts by weight of carbon black, fumed colloidal silica and calcium carbonate.
References Cited (Backward Citations)
US2874416A
Cited
US2851735A
Cited
US2929793A
Cited
US3098262A
Cited
US3212925A
Cited
US3598692A
Cited
US3632842A
Cited
US3668041A
Cited
US3632467A
Cited
GB1363251A
Cited
US3953650A
Cited
US3941908A
Cited
US3992842A
Cited
US3983290A
Cited
US4018962A
Cited
JPS5335759A
Cited
US4100325A
Cited
US4183777A
Cited
JPS5461275A
Cited
JPS54102365A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-05-06 | 1988-11-05 | 1989-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-06 | 1992-11-05 | 1993-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-06 | 1996-11-05 | 1997-05-07 | $7700.00 | Window Closed / Lapsed |