US4129535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fire retardant polyvinyl chloride containing compositions
Assignee: Stauffer Chemical Co
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Filing: 1975-12-08
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Granted: 1978-12-12
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Expires: 1995-12-08
Abstract
Abstract Compositions for preparing fire retardant polyvinyl chloride films characterized by their unusual combination of low flame spread, low smoke density, reduced permeability for vapor transmission and good cold crack resistance are described. These film forming compositions comprise a blend of about 40-55% polyvinyl chloride, about 7-20% of chlorinated polyethylene, about 4-20% of a phosphate ester plasticizer, about 3-7% of a magnesium hydroxide filler, about 3-6% of zinc borate and about 3-6% of an antimony trioxide fire retardant with various lubricants, pigments and stabilizers being included where desired. The films derived from the above blend enjoy particular utility in preparing vapor barrier constructions for use in the building trade.
Inventors
- 👤 Robert G. Elcik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:56
CPC Classifications
C; C08; C08K; C08K13/00; C08K13/02; B; B32; B32B; B32B27/00; B32B27/18; B32B27/20; B32B27/22; B32B27/30; B32B27/304; B32B27/32; B32B7/00; B32B7/04; B32B7/12; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08K3/28; C08K3/38; C08K5/00; C08K5/49; C08K5/51; C08K5/52; C08L; C08L23/00; C08L23/26; C08L23/28; C08L23/286; C08L27/00; C08L27/02; C08L27/04; C08L27/06; B32B2262/00; B32B2262/10; B32B2262/101; B32B2270/00; B32B2307/00; B32B2307/30; B32B2307/306; B32B2307/3065; B32B2307/70; B32B2307/724; B32B2307/7242; B32B2307/7246; B32B2315/00; B32B2315/08; B32B2315/085; B32B2323/00; B32B2327/00; B32B2327/06; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921; Y10T; Y10T428/00; Y10T428/25; Y10T428/258; Y10T428/31504; Y10T428/31855; Y10T428/31935; Y10T442/00; Y10T442/60; Y10T442/674; Y10T442/676; Y10T442/696; Y10T442/699
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
139 words
A film forming composition adapted for use in a vapor barrier comprising an intimate admixture of: (1) from about 40% to 55%, by weight, of a vinyl chloride polymer; (2) from about 7% to 20%, by weight, of a chlorinated polyethylene having a chlorine content of from about 35% to about 45%; (3) from about 4% to 20%, by weight, of a phosphate ester plasticizer; (4) from about 3% to 6%, by weight, of an antimony trioxide flame retardant having a particle size of below about 5 microns; (5) from about 3% to 7%, by weight, of a magnesium hydroxide filler having a low oil absorption value and a particle size such that at least 99% of the particles have a diameter of less than 45 microns and, (6) from about 3% to 6%, by weight, of zinc borate.
Claim 2
Dependent Claim
139 words
A film forming composition adapted for use in a vapor barrier comprising an intimate admixture of: (1) from about 40% to 55%, by weight, of a vinyl chloride polymer; (2) from about 7% to 20%, by weight, of a chlorinated polyethylene having a chlorine content of from about 35% to about 45%; (3) from about 4% to 20%, by weight, of a phosphate ester plasticizer; (4) from about 3% to 6%, by weight, of an antimony trioxide flame retardant having a particle size of below about 5 microns; (5) from about 3% to 7%, by weight, of a magnesium hydroxide filler having a low oil absorption value and a particle size such that at least 99% of the particles have a diameter of less than 45 microns and, (6) from about 3% to 6%, by weight, of zinc borate.
Claim 3
Dependent Claim
36 words
The composition of claim 1, wherein said vinyl chloride polymer has a Relative Viscosity, as determined with a 1%, by weight, solution in cyclohexanone, at 25° C., in the range of from about 2.00 to 2.45.
Claim 4
Dependent Claim
20 words
The composition of claim 2, wherein said vinyl chloride polymer has a Relative Viscosity of about 2.20 to about 2.30.
Claim 5
Dependent Claim
13 words
The composition of claim 1, wherein said vinyl chloride polymer is polyvinyl chloride.
Claim 6
Dependent Claim
14 words
The composition of claim 1, wherein said phosphate ester plasticizer is diphenyl 2-ethylhexyl phosphate.
Claim 7
Dependent Claim
30 words
The composition of claim 1, wherein said antimony trioxide fire retardant comprises a composition containing a major proportion of a mixture of the cubic and orthorhombic forms of antimony trioxide.
Claim 8
Dependent Claim
40 words
The composition of claim 1, wherein said magnesium hydroxide filler comprises brucite having a particle size such that 99% of its particles have a diameter of less than 45 microns and an oil absorption value of about 22 cc/100 grams.
Claim 9
Dependent Claim
11 words
A composition as claimed in claim 1 which comprises a lubricant.
Claim 10
Dependent Claim
16 words
A composition as claimed in claim 8 wherein the lubricant comprises calcium stearate and stearic acid.
Claim 11
Dependent Claim
17 words
A composition as claimed in claim 9 wherein the lubricant is present at about 0.1 to 0.5%.
Claim 12
Dependent Claim
10 words
A self-supporting film derived from the composition of claim 1.
Claim 13
Dependent Claim
10 words
A self-supporting film derived from the composition of claim 8.
Claim 14
Dependent Claim
10 words
A self-supporting film derived from the composition of claim 10.
References Cited (Backward Citations)
US2650908A
Cited
US2668119A
Cited
US2669548A
Cited
US3318757A
Cited
GB1080468A
Cited
US3575779A
Cited
GB1147009A
Cited
US3816367A
Cited
US3723139A
Cited
US3872041A
Cited
US3945974A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-12-11 | 1982-06-12 | 1982-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-11 | 1986-06-12 | 1986-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-11 | 1990-06-12 | 1990-12-12 | $7700.00 | Window Closed / Lapsed |