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US4176097A
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Asbestos-free tape sealant
Assignee: BP Corp North America Inc
•
Filing: 1978-04-25
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Granted: 1979-11-27
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Expires: 1998-04-25
Abstract
Abstract An asbestos-free sealant composition comprises cotton fiber, amorphous polypropylene and butyl rubber incorporated into a base stock comprising an inorganic filler and a suitable binder.
Inventors
- 👤 Roy A. Fox
- 👤 Bradford T. Mortimer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:49
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/10; C09K3/1025; C09K3/1028; C09K2200/00; C09K2200/02; C09K2200/0239; C09K2200/0243; C09K2200/0252; C09K2200/06; C09K2200/0607; C09K2200/061; C09K2200/0615; C09K2200/0617; C09K2200/0692; C09K2200/0697
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
45 words
A sealant composition comprising the following components: ______________________________________
Component Approximate wt. % Range
______________________________________
cotton fiber (up to 0.25 inch)
2-20
amorphous polypropylene (200-1800
centipoises) 1-10
butyl rubber (Mooney vicosity
40-65) 0.5-25
inorganic filler 30-80
polybutene (200-1000 centipoises)
15-40
polyisobutlylene (molec. wt.
20,000-50,000) 0-40
______________________________________
Claim 2
Dependent Claim
45 words
A sealant composition comprising the following components: ______________________________________
Component Approximate wt. % Range
______________________________________
cotton fiber (up to 0.25 inch)
2-20
amorphous polypropylene (200-1800
centipoises) 1-10
butyl rubber (Mooney vicosity
40-65) 0.5-25
inorganic filler 30-80
polybutene (200-1000 centipoises)
15-40
polyisobutlylene (molec. wt.
20,000-50,000) 0-40
______________________________________
Claim 3
Dependent Claim
13 words
The sealant composition of claim 1 wherein the inorganic filler comprises calcium carbonate.
Claim 4
Dependent Claim
18 words
The sealant composition of claim 1 wherein the inorganic filler comprises mixture of calcium carbonate and diatomaceous silica.
Claim 5
Dependent Claim
20 words
The sealant composition of claim 1 wherein the inorganic filler comprises a mixture of calcium carbonate, diatomaceous silica, and clay.
Claim 6
Dependent Claim
15 words
The sealant composition of claim 1 wherein the butyl rubber is partially cross-linked butyl rubber.
Claim 7
Dependent Claim
52 words
A sealant composition of claim 1 which contains about 4 to about 8 wt. % cotton fiber, to about 4 to about 7 wt. % amorphous polypropylene, about 1 to about 5 wt. % butyl rubber, about 20 to about 33% polybutene, and about 30 to about 55 wt. % inorganic filler.
Claim 8
Dependent Claim
30 words
The sealant composition of claim 6 wherein the inorganic filler comprises about 30 to about 55 wt. % calcium carbonate and about 2 to about 10 wt. % diatomaceous silica.
Claim 9
Dependent Claim
38 words
The sealant composition of claim 6 wherein the inorganic filler comprises about 30 to about 55 wt. % calcium carbonate, about 2 to about 10 wt. % diatomaceous silica and about 2 to about 20 wt. % clay.
Claim 10
Dependent Claim
38 words
The sealant composition of claim 8 wherein the inorganic filler comprises about 40 to about 50 wt. % calcium carbonate, about 3 to about 7 wt. % diatomaceous silica and about 12 to about 18 wt. % clay.
Claim 11
Dependent Claim
51 words
A sealant composition of claim 1 which contains about 5 wt. % cotton fiber, about 5 wt. % amorphous polypropylene, about 2 wt. % partially cross-linked butyl rubber, about 24 wt. % polybutene, about 44 wt. % calcium carbonate, about 4 wt. % diatomaceous silica and about 16 wt. % clay.
Claim 12
Dependent Claim
61 words
A sealant composition of claim 1 which contains about 4 to about 15 wt. % cotton fiber, about 2 to about 8 wt. % amorphous polypropylene, about 3 to about 15 wt. % butyl rubber, about 30 to about 65 wt. % inorganic filler, about 15 to about 25 wt. % polybutene and about 20 to about 33 wt. % polyisobutylene.
Claim 13
Dependent Claim
13 words
The sealant composition of claim 11 wherein the inorganic filler comprises calcium carbonate.
Claim 14
Dependent Claim
45 words
The sealant composition of claim 11 which contains about 6 wt. % cotton fiber, about 5 wt. % amorphous polypropylene, about 12 wt. % partially cross-linked butyl rubber, about 35 wt. % inorganic filler, about 18 wt. % polybutene and about 24 wt. % polyisobutylene.
Claim 15
Dependent Claim
27 words
A sealant composition of claim 13 which contains about 20 wt. % calcium carbonate, about 3 wt. % diatomaceous silica and about 12 wt. % platelet talc.
Claim 16
Dependent Claim
25 words
An extruded tape formed from the sealant compositions of claim 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, or 14.
References Cited (Backward Citations)
GB690333A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-11-26 | 1983-05-28 | 1983-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-11-26 | 1987-05-28 | 1987-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-11-26 | 1991-05-28 | 1991-11-27 | $7700.00 | Window Closed / Lapsed |