US4139476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fire retardant polyolefins
Assignee: Individual
•
Filing: 1977-09-01
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Granted: 1979-02-13
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Expires: 1997-09-01
Abstract
Abstract Polypropylene and other polyolefins are rendered flame retardant by the addition of a phosphonate ester having the following formula: ##STR1## wherein a is 0, 1 or 2, b is 0, 1 or 2, c is 1, 2 or 3 and a+b+c is 3; R and R' are the same or dissimilar and are alkyl, alkoxy, aryl, aryloxy, alkaryl, alkaryloxy, aralkyl, aryloyxalkoxy, or aralkoxy, wherein the alkyl portion of these groups may contain hydroxyl but no halogen and the aryl portion may contain chlorine bromine and hydroxyl groups; R 2 is alkyl, hydroxyalkyl, or aryl; R 3 is lower alkyl (C 1 -C 4 ); and a wetting agent penetrant. The presence of the penetrant promotes penetration of the retardant composition into the polypropylene. This fire retardant composition is particularly useful in polypropylene fibers and fabrics particularly where the fibers are woven into a matte.
Inventors
- 👤 Henry Hancock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:39
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/244; D06M13/282; D06M13/288; D06M13/29; C; C07; C07F; C07F9/00; C07F9/02; C07F9/547; C07F9/6564; C07F9/6571; C07F9/657163; C07F9/657181; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/53; C08K5/5317; C08K5/5333; C08K5/5357; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
126 words
A flame retardant polyolefin fabric comprising: a polyolefin fabric being coated with a composition comprising a phosphonate ester having the following formula: ##STR8## wherein a is 0, 1 or 2, b is 0, 1 or 2, c is 1, 2 or 3 and a+b+c is 3; R and R' are the same or dissimilar and are alkyl, alkoxy, aryl, aryloxy, alkaryl, alkaryloxy, aralkyl, aryloyxalkoxy, or aralkoxy, wherein the alkyl portion of these groups may contain hydroxyl but no halogen and the aryl portion may contain chlorine bromine and hydroxyl groups; R 2 is alkyl, hydroxyalkyl, or aryl; R 3 is lower alkyl (C 1 -C 4 ); wherein said ester is present in an amount of from 5 to 15 percent by weight of the fabric.
Claim 2
Dependent Claim
126 words
A flame retardant polyolefin fabric comprising: a polyolefin fabric being coated with a composition comprising a phosphonate ester having the following formula: ##STR8## wherein a is 0, 1 or 2, b is 0, 1 or 2, c is 1, 2 or 3 and a+b+c is 3; R and R' are the same or dissimilar and are alkyl, alkoxy, aryl, aryloxy, alkaryl, alkaryloxy, aralkyl, aryloyxalkoxy, or aralkoxy, wherein the alkyl portion of these groups may contain hydroxyl but no halogen and the aryl portion may contain chlorine bromine and hydroxyl groups; R 2 is alkyl, hydroxyalkyl, or aryl; R 3 is lower alkyl (C 1 -C 4 ); wherein said ester is present in an amount of from 5 to 15 percent by weight of the fabric.
Claim 3
Dependent Claim
29 words
The fabric of claim 1, wherein said coating further comprising a penetrant for the polyolefin, wherein said phosphonate ester is present below the surface of the polyolefin as well.
Claim 4
Dependent Claim
10 words
The fabric of claim 1, wherein the polyolefin is polypropylene.
Claim 5
Dependent Claim
16 words
The fabric of claim 1, wherein the polyolefin is polypropylene and the phosphonate ester is: ##STR9##
Claim 6
Dependent Claim
20 words
The fabric of claim 4, wherein the phosphonate ester is present in about 8 percent by weight of the fabric.
Claim 7
Dependent Claim
23 words
The fabric of claim 5, further comprising a thermoplastic backing for the fabric, and wherein the backing is coated with said phosphonate ester.
Claim 8
Dependent Claim
12 words
The fabric of claim 6, wherein the thermoplastic is an acrylic polymer.
Claim 9
Dependent Claim
16 words
The fabric of claim 4, wherein the fabric exhibits no after flame and no after glow.
Claim 10
Dependent Claim
16 words
The fabric of claim 7, wherein the fabric exhibits no after flame and no after glow.
Claim 11
Dependent Claim
29 words
The fabric of claim 5, wherein said coating further comprising a penetrant for the polyolefin, wherein said phosphate ester is present below the surface of the polyolefin as well.
Claim 12
Dependent Claim
126 words
A flame retardant polyolefin fiber comprising: a polyolefin fiber being coated with a composition comprising a phosphonate ester having the following formula: ##STR10## wherein a is 0, 1 or 2, b is 0, 1 or 2, c is 1, 2 or 3 and a+b+c is 3; R and R' are the same or dissimilar and are alkyl, alkoxy, aryl, aryloxy, alkaryl, alkaryloxy, aralkyl, aryloxyalkoxy, or aralkoxy, wherein the alkyl portion of these groups may contain hydroxyl but no halogen and the aryl portion may contain chlorine bromine and hydroxyl groups; R 2 is alkyl, hydroxyalkyl, or aryl; R 3 is lower alkyl (C 1 -C 4 ); wherein said ester is present in an amount of from 5 to 15 percent by weight of the fiber.
Claim 13
Dependent Claim
126 words
A flame retardant polyolefin fiber comprising: a polyolefin fiber being coated with a composition comprising a phosphonate ester having the following formula: ##STR10## wherein a is 0, 1 or 2, b is 0, 1 or 2, c is 1, 2 or 3 and a+b+c is 3; R and R' are the same or dissimilar and are alkyl, alkoxy, aryl, aryloxy, alkaryl, alkaryloxy, aralkyl, aryloxyalkoxy, or aralkoxy, wherein the alkyl portion of these groups may contain hydroxyl but no halogen and the aryl portion may contain chlorine bromine and hydroxyl groups; R 2 is alkyl, hydroxyalkyl, or aryl; R 3 is lower alkyl (C 1 -C 4 ); wherein said ester is present in an amount of from 5 to 15 percent by weight of the fiber.
References Cited (Backward Citations)
US3932478A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-02-12 | 1982-08-14 | 1983-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-12 | 1986-08-14 | 1987-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-12 | 1990-08-14 | 1991-02-13 | $7700.00 | Window Closed / Lapsed |