Patent US4280005A successfully refreshed from Google Patents.
US4280005A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foamable polyester composition
Assignee: General Electric Co
•
Filing: 1979-09-24
•
Granted: 1981-07-21
•
Expires: 1999-09-24
Abstract
Abstract A foamable flame-retardant thermoplastic injection moldable composition comprising in admixture (a) a polyester resin, (b) a filler selected from the group consisting of fibrous glass or a mineral or mixtures thereof in an amount of from about 5 to about 50 weight percent, (c) a flame-retardant additive and (d) a minor amount of a foaming agent.
Inventors
- 👤 Daniel W. Fox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:27
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0085; C08J9/0014; C08J9/0066; C08J2367/00; C08J2367/02; Y; Y10; Y10S; Y10S260/00; Y10S260/24; Y10S521/00; Y10S521/907
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
158 words
A foamable thermoplastic injection moldable composition consisting of an admixture of: (a) a polyester resin selected from the group consisting of (1) a poly(ethylene terephthalate) resin or a copolyester thereof, (2) a combination of a poly(ethylene terephthalate) resin and a poly(1,4-butylene terephthalate) resin or copolyesters thereof and (3) a combination of a poly(1,4-butylene terephthalate) resin or a copolyester thereof and a linear aliphatic polyester resin; (b) a filler selected from the group consisting of fibrous glass or a mineral or mixtures thereof in an amount of from about 5 to about 50 weight percent; (c) a flame retardant additive in minor proportion but in an amount at least sufficient to render the polyester non-burning or selfextinguishing; and (d) a foaming agent selected from the group consisting of dinitrosopentamethylene tetramine, p-toluene sulfonyl semicarbozide, 5-phenyltetrazole, calcium oxalete and trihydrazine-s-triazene in an amount from 0.2 to 2.0 weight percent; said weight percent being based on the total weight of the resin.
Claim 2
Dependent Claim
158 words
A foamable thermoplastic injection moldable composition consisting of an admixture of: (a) a polyester resin selected from the group consisting of (1) a poly(ethylene terephthalate) resin or a copolyester thereof, (2) a combination of a poly(ethylene terephthalate) resin and a poly(1,4-butylene terephthalate) resin or copolyesters thereof and (3) a combination of a poly(1,4-butylene terephthalate) resin or a copolyester thereof and a linear aliphatic polyester resin; (b) a filler selected from the group consisting of fibrous glass or a mineral or mixtures thereof in an amount of from about 5 to about 50 weight percent; (c) a flame retardant additive in minor proportion but in an amount at least sufficient to render the polyester non-burning or selfextinguishing; and (d) a foaming agent selected from the group consisting of dinitrosopentamethylene tetramine, p-toluene sulfonyl semicarbozide, 5-phenyltetrazole, calcium oxalete and trihydrazine-s-triazene in an amount from 0.2 to 2.0 weight percent; said weight percent being based on the total weight of the resin.
Claim 3
Dependent Claim
62 words
The composition of claim 1 wherein the polyester resin combination (2) comprises (a) from about 1 to about 99 parts by weight of a poly(ethylene terephthalate) resin and (b) from about 99 to about 1 part by weight of a poly(1,4-butylene terephthalate) resin or a copolyester thereof with a minor amount of an aliphatic or aromatic dicarboxylic acid or an aliphatic polyol.
Claim 4
Dependent Claim
81 words
A flame retardant composition as defined in claim 1 wherein said flame retardant additive is a compound selected from the group consisting of a halogen-containing compound, a halogen-containing compound in admixture with an antimony compound; elemental phosphorus or a phosphorus compound; a halogen-containing compound in admixture with a phosphorus compound; a compound containing phosphorus-nitrogen bonds; or a mixture of the foregoing, and said compound is present in an amount of 0.5 to 50 weight percent based on the weight of resin.
Claim 5
Dependent Claim
108 words
A flame retardant composition as defined in claim 1 wherein said flame retardant additive is either (a) a low molecular weight polymer of a carbonate of a halogenated dihydric phenol, said polymer containing from 2 to 10 repeating units of the formula ##STR8## wherein R 1 and R 2 are hydrogen, (lower)alkyl or phenyl, X 1 and X 2 are bromo or chloro and m and r are from 1 to 4, said polymer having low volatility when heated above about 200° C., and a softening point of less than about 300° C., or (b) a combination of said polymer (a) and an inorganic or organic antimony-containing compound.
Claim 6
Dependent Claim
52 words
A flame retardant composition as defined in claim 4 wherein said low molecular weight polymer (a) is of the formula ##STR9## wherein the average number of repeating units, n, is from about 3 to 7, and the softening point of said polymer is in the range of from 200° to 260° C.
Claim 7
Dependent Claim
50 words
A flame retardant composition as defined in claim 3 wherein said flame retardant additive is either (a) a carbonate polymer which is the reaction product of a halogen substituted dihydric phenol and a dihydric phenol or (b) a combination of said polymer (a) and an inorganic or organic antimony-containing compound.
Claim 8
Dependent Claim
23 words
A flame retardant composition as defined in claim 6 wherein said carbonate polymer is the reaction product of a halogenated bisphenol-A and bisphenol-A.
Claim 9
Dependent Claim
16 words
The composition of claim 1 wherein the fibrous glass filler comprises finely divided fibrous glass filaments.
Claim 10
Dependent Claim
21 words
The composition of claim 1 wherein the fibrous glass filler consists of finely divided glass filaments treated with a binding agent.
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) | 1984-07-20 | 1985-01-19 | 1985-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-20 | 1989-01-19 | 1989-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-20 | 1993-01-19 | 1993-07-21 | $7700.00 | Window Closed / Lapsed |