US3904707A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame retardant polyester compositions
Assignee: Shell USA Inc
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Filing: 1974-11-25
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Granted: 1975-09-09
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Expires: 1994-11-25
Abstract
Abstract Polyester compositions having flame retardant characteristics comprising (A) a high molecular weight linear polyester selected from the group consisting of copolyesters and blends of copolyesters and homopolyesters and (B) a synergistic mixture of from 5 to 10 percent by weight, based on the total weight of said composition, of polyvinyl chloride and from 5 to 10 percent by weight, based on the total weight of said composition, of at least one compound selected from the group consisting of antimony trioxide, boron trioxide, tetrabromophthalic anhydride, tetrachlorophthalic anhydride and chlorendic acid anhydride.
Inventors
- 👤 Charles J Gebhart
- 👤 Clyde E Gleim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:38
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02; C08K; C08K3/00; C08K3/18; C08K3/20; C08K5/00; C08K5/04; C08K5/09; C08L27/00; C08L27/02; C08L27/04; C08L27/06; Y; Y10; Y10S; Y10S260/00; Y10S260/24
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
77 words
COPOLYESTERS PREPARED BY REACTING TWO OR MORE DICARBOXYLIC ACIDS OR THE C1-C4 LOWER ALKYL ESTERS THEREOF WHERE SAID ACIDS ARE SELECTED FROM THE GROUP CONSISTING OF SATURATED ALIPHATIC DICARBOXYLIC ACIDS AND AROMATIC DICARBOXYLIC ACIDS WITH ONE OR MORE GLYCOLS SELECTED FROM THE GROUP CONSISTING OF CLYCOLS REPRESENTED BY THE FORMULAS HO(CH2)NOH WHERE N IS AN INTEGER FROM 2 TO 10 AND HOCH2C(R)2CH2OH WHERE R IS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN AND ALKYL AND ARYL RADICALS,
Claim 2
Dependent Claim
77 words
COPOLYESTERS PREPARED BY REACTING TWO OR MORE DICARBOXYLIC ACIDS OR THE C1-C4 LOWER ALKYL ESTERS THEREOF WHERE SAID ACIDS ARE SELECTED FROM THE GROUP CONSISTING OF SATURATED ALIPHATIC DICARBOXYLIC ACIDS AND AROMATIC DICARBOXYLIC ACIDS WITH ONE OR MORE GLYCOLS SELECTED FROM THE GROUP CONSISTING OF CLYCOLS REPRESENTED BY THE FORMULAS HO(CH2)NOH WHERE N IS AN INTEGER FROM 2 TO 10 AND HOCH2C(R)2CH2OH WHERE R IS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN AND ALKYL AND ARYL RADICALS,
Claim 3
Dependent Claim
20 words
FLAME RETARDANT LINEAR POLYESTER COMPOSITIONS COMPRISING A. A HIGH MOLECULAR WEIGHT ESSENTIALLY LINEAR COPOLYESTER SELLECTED FROM THE GROUP CONSISTING OF
Claim 4
Dependent Claim
20 words
FLAME RETARDANT LINEAR POLYESTER COMPOSITIONS COMPRISING A. A HIGH MOLECULAR WEIGHT ESSENTIALLY LINEAR COPOLYESTER SELLECTED FROM THE GROUP CONSISTING OF
Claim 5
Dependent Claim
28 words
COPOLYESTERS PREPARED BY REACTING TWO OR MORE OF THE ABOVE DEFINED GLYCOLS WITH ONE OR MORE OF THE ABOVE DEFINED DICARBOXYLIC ACIDS OR LOWER ALKYL ESTERS THEREOF AND
Claim 6
Dependent Claim
28 words
COPOLYESTERS PREPARED BY REACTING TWO OR MORE OF THE ABOVE DEFINED GLYCOLS WITH ONE OR MORE OF THE ABOVE DEFINED DICARBOXYLIC ACIDS OR LOWER ALKYL ESTERS THEREOF AND
Claim 7
Dependent Claim
111 words
blends of at least one of said copolyesters with at least one homopolyester selected from the group consisting of poly(ethylene terephthalate), poly(trimethylene terephthalate), poly(tetramethylene terephthalate), poly(hexamethylene terephthalate), poly(ethylene-2,6-naphthalate), poly(ethylene-2,7-naphthalate) and poly(ethylene phenylindanate) wherein said copolyesters and homopolyesters each have intrinsic viscosities of at least 0.5 and B. a synergistic mixture comprised of from 5 to 10 percent by weight, based on the total weight of said polyester compositions, of polyvinyl chloride and from 5 to 10 percent by weight, based on the total weight of said polyester compositions of at least one material selected from the group consisting of antimony trioxide, boron trioxide, tetrabromophthalic anhydride, tetrachlorophthalic anhydride and chlorendic acid anhydride.
Claim 8
Dependent Claim
111 words
blends of at least one of said copolyesters with at least one homopolyester selected from the group consisting of poly(ethylene terephthalate), poly(trimethylene terephthalate), poly(tetramethylene terephthalate), poly(hexamethylene terephthalate), poly(ethylene-2,6-naphthalate), poly(ethylene-2,7-naphthalate) and poly(ethylene phenylindanate) wherein said copolyesters and homopolyesters each have intrinsic viscosities of at least 0.5 and B. a synergistic mixture comprised of from 5 to 10 percent by weight, based on the total weight of said polyester compositions, of polyvinyl chloride and from 5 to 10 percent by weight, based on the total weight of said polyester compositions of at least one material selected from the group consisting of antimony trioxide, boron trioxide, tetrabromophthalic anhydride, tetrachlorophthalic anhydride and chlorendic acid anhydride.
Claim 9
Dependent Claim
20 words
Flame retardant linear polyester compositions comprising A. a high molecular weight essentially linear polyester selected from the group consisting of
Claim 10
Dependent Claim
20 words
Flame retardant linear polyester compositions comprising A. a high molecular weight essentially linear polyester selected from the group consisting of
Claim 11
Dependent Claim
28 words
copolyesters prepared by reacting two or more of the above defined glycols with one or more of the above defined dicarboxylic acids or lower alkyl esters thereof, and
Claim 12
Dependent Claim
28 words
copolyesters prepared by reacting two or more of the above defined glycols with one or more of the above defined dicarboxylic acids or lower alkyl esters thereof, and
Claim 13
Dependent Claim
136 words
BLENDS COMPRISING A COPOLYESTER SELECTED FROM THE GROUP CONSISTING OF COPOLYESTERS AS DEFINED IN (1) AND (2) ABOVE AND A HOMPOPOLYESTER PREPARED BY THE REACTION OF AN AROMATIC DICARBOXYLIC ACID OR LOWER ALKYL (C1-C4) ESTER THEREOF WITH A GLYCOL SELECTED FROM THE GROUP OF GLYCOLS DEFINED BY THE FORMULAS ABOVE WHERE SAID COPOLYESTERS AND BLENDS OF SAID COPOLYESTERS AND HOMOPOLYESTERS OF (A) HAVE INTRINSIC VISCOSITIES OF AT LEAST 0.5 AND B. A SYNERGISTIC MIXTURE COMPRISED OF FROM 5 TO 10 PERCENT BY WEIGHT BASED ON THE TOTAL WEIGHT OF SAID POLYESTER COMPOSITIONS OF POLYVINYL CHLORIDE AND FROM 5 TO 10 PERCENT BY WEIGHT BASED ON THE TOTAL WEIGHT OF SAID POLY ESTER COMPOSITIONS OF AT LAST ONE MATERIAL SELECTED FROM THE GROUP CONSISTING OF ANTIMONY TRIOXIDE BORON TRIOXIDE TETRAMOPHTHALIC ANHYDRIDE TETRACHLOROPHALIC ANHYDRIDE AND CHLORENDIC ACID ANHYDRIDE.
Claim 14
Dependent Claim
136 words
BLENDS COMPRISING A COPOLYESTER SELECTED FROM THE GROUP CONSISTING OF COPOLYESTERS AS DEFINED IN (1) AND (2) ABOVE AND A HOMPOPOLYESTER PREPARED BY THE REACTION OF AN AROMATIC DICARBOXYLIC ACID OR LOWER ALKYL (C1-C4) ESTER THEREOF WITH A GLYCOL SELECTED FROM THE GROUP OF GLYCOLS DEFINED BY THE FORMULAS ABOVE WHERE SAID COPOLYESTERS AND BLENDS OF SAID COPOLYESTERS AND HOMOPOLYESTERS OF (A) HAVE INTRINSIC VISCOSITIES OF AT LEAST 0.5 AND B. A SYNERGISTIC MIXTURE COMPRISED OF FROM 5 TO 10 PERCENT BY WEIGHT BASED ON THE TOTAL WEIGHT OF SAID POLYESTER COMPOSITIONS OF POLYVINYL CHLORIDE AND FROM 5 TO 10 PERCENT BY WEIGHT BASED ON THE TOTAL WEIGHT OF SAID POLY ESTER COMPOSITIONS OF AT LAST ONE MATERIAL SELECTED FROM THE GROUP CONSISTING OF ANTIMONY TRIOXIDE BORON TRIOXIDE TETRAMOPHTHALIC ANHYDRIDE TETRACHLOROPHALIC ANHYDRIDE AND CHLORENDIC ACID ANHYDRIDE.
Claim 15
Dependent Claim
135 words
blends comprising a copolyester selected from the group consisting of copolyesters as defined in (1) and (2) above and a homopolyester prepared by the reaction of an aromatic dicarboxylic acid or lower alkyl (C1-C4) ester thereof with a glycol selected from the group of glycols defined by the formulas above where said copolyesters and blends of said copolyesters and homopolyesters of (A) have intrinsic viscosities of at least 0.5 and B. a synergistic mixture comprised of from 5 to 10 percent by weight based on the total weight of said polyester compositions, of polyvinyl chloride and from 5 to 10 percent by weight, based on the total weight of said polyester compositions of at least one material selected from the group consisting of antimony trioxide, boron trioxide, tetrabromophthalic anhydride, tetrachlorophthalic anhydride and chlorendic acid anhydride.
Claim 16
Dependent Claim
135 words
blends comprising a copolyester selected from the group consisting of copolyesters as defined in (1) and (2) above and a homopolyester prepared by the reaction of an aromatic dicarboxylic acid or lower alkyl (C1-C4) ester thereof with a glycol selected from the group of glycols defined by the formulas above where said copolyesters and blends of said copolyesters and homopolyesters of (A) have intrinsic viscosities of at least 0.5 and B. a synergistic mixture comprised of from 5 to 10 percent by weight based on the total weight of said polyester compositions, of polyvinyl chloride and from 5 to 10 percent by weight, based on the total weight of said polyester compositions of at least one material selected from the group consisting of antimony trioxide, boron trioxide, tetrabromophthalic anhydride, tetrachlorophthalic anhydride and chlorendic acid anhydride.
Claim 17
Dependent Claim
70 words
The flame retardant essentially linear polyester compositions of claim 2 wherein (A) is a blend comprised of from 25 to 75 percent by weight, based on the total weight of the blend of a copolyester having an intrinsic viscosity of at least 0.7 and from 75 to 25 percent by weight, based on the total weight of the blend, of a homopolyester having an intrinsic viscosity of at least 0.7.
Claim 18
Dependent Claim
21 words
The flame retardant linear polyester compositions of claim 2 wherein (A) is a blend of poly(tetramethylene terephthalate/isophthalate/sebacate) and poly (tetramethylene terephthalate).
Claim 19
Dependent Claim
21 words
The flame retardant linear polyester compositions of claim 2 wherein (A) is a blend of poly (tetramethylene terephthalate/isophthalate/sebacate and poly(ethylene terephthalate).
Claim 20
Dependent Claim
68 words
The flame retardant essentially linear polyester compositions of claim 2 wherein (B) is a synergistic mixture comprised of from 5 to 10 percent by weight, based on the total weight of said polyester compositions, of polyvinyl chloride and from 5 to 10 percent by weight, based on the total weight of said polyester compositions, of a material selected from the group consisting of antimony trioxide and tetrabromophthalic anhydride.
Claim 21
Dependent Claim
41 words
The flame retardant linear polyester compositions of claim 2 wherein the polyvinyl chloride compound of the synergistic mixture (B) is an essentially rigid polyvinyl cHloride having an intrinsic viscosity ranging from 0.6 to 1.2 as measured in cyclohexane at 30.0* C.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-08 | 1979-03-10 | 1979-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-08 | 1983-03-10 | 1983-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-08 | 1987-03-10 | 1987-09-09 | $7700.00 | Window Closed / Lapsed |