EP0071968A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Thermoplastic composition containing oligomer
Assignee: Honeywell International Inc
•
Filing: 1982-08-03
•
Granted: —
•
Expires: 2002-08-03
Abstract
Abstract A thermotropic oligomer such as a polyester is blended with a high molecular weight thermoplastic polymer such as poy(ethylene terphthalate) to raise the modulus value of the composition compared to the polymer alone, especially at the glass transition temperature of the polymer and above.
Inventors
- 👤 Dusan Ciril Prevorsek
- 👤 Murali Krishna Akkapeddi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 04:33
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/88; C; C08; C08K; C08K5/00; C08K5/04; C08K5/10; C08L; C08L101/00; C08L67/00; C08L67/02
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
186 words
A thermoplastic composition comprising: a) a thermoplastic polymer of high molecular weight which has a fusion temperature at a first temperature, has a glass transition temperature and forms an isotropic liquid above the first temperature, and b) dispersed in said thermoplastic polymer an oligomer having a melting point at a second temperature, said second temperature being not more than 50°C less than said first temperature nor more than 70°C more than said first temperature; said oligomer exhibiting thermotropic behavior between said second temperature and a third temperature, said third temperature being at least 30°C above said second temperature and at least about 10°C above said first temperature; said oligomer having a number average length/diameter ratio (L/D) of at least 10, a glass transition temperature at least 10°C greater than the glass transition temperature of said polymer and a Small's solubility parameter within 2 of the Small's solubility parameter of said polymer; the amount of said oligomer being sufficient to raise the modulus value of the thermoplastic composition to at least 110% of the corresponding value of the polymer at the glass transition temperature of said polymer.
Claim 2
Dependent Claim
186 words
A thermoplastic composition comprising: a) a thermoplastic polymer of high molecular weight which has a fusion temperature at a first temperature, has a glass transition temperature and forms an isotropic liquid above the first temperature, and b) dispersed in said thermoplastic polymer an oligomer having a melting point at a second temperature, said second temperature being not more than 50°C less than said first temperature nor more than 70°C more than said first temperature; said oligomer exhibiting thermotropic behavior between said second temperature and a third temperature, said third temperature being at least 30°C above said second temperature and at least about 10°C above said first temperature; said oligomer having a number average length/diameter ratio (L/D) of at least 10, a glass transition temperature at least 10°C greater than the glass transition temperature of said polymer and a Small's solubility parameter within 2 of the Small's solubility parameter of said polymer; the amount of said oligomer being sufficient to raise the modulus value of the thermoplastic composition to at least 110% of the corresponding value of the polymer at the glass transition temperature of said polymer.
Claim 3
Dependent Claim
14 words
The thermoplastic composition of claim 1 wherein said thermoplastic polymer is a poly(alkylene arylate).
Claim 4
Dependent Claim
19 words
The thermplastic composition of claim 2 wherein said thermoplastic polymer is a poly(alkylene terephthalate), said alkylene having 2-4 carbons.
Claim 5
Dependent Claim
61 words
The thermoplastic composition of claim 1 or 2 or 3 or 4 or 5 wherein said oligomer is a polyester having residues selected from: with the moles of I + IV = II and wherein R, R' and R" are each 1,4-phenylene, 2,5-naphthalene, 2,6-napththalene, 1.4-cyclohexyl, 4,4' -biphenyl, 2,6-anthracene-9,10-dione or any of them substituted by alkyl, aryl, fluoro, chloro, bromo or alkoxy.
Claim 6
Dependent Claim
35 words
The thermoplastic composition of claim 4 wherein said residues are terephthaloyl or substituted -terephthaloyl, substituted hydroquinone and an additional biphenol wherein R is 4,4'-biphenyl or hydroquinone, each unsubstituted or substituted by methyl, chloro or t-butyl.
Claim 7
Dependent Claim
14 words
The thermoplastic composition of any previous claim wherein L/D is between 10/1 and 50/1.
Claim 8
Dependent Claim
25 words
The thermoplastic composition of any previous claim wherein the glass transition temperature of said oligomer is at least 20°C greater than that of said polymer.
Claim 9
Dependent Claim
12 words
The thermoplastic composition of claim 1 wherein said polymer is a polyamide.
Claim 10
Dependent Claim
13 words
The thermoplastic composition of claim 8 wherein said oligomer is a thermotropic polyester.
Claim 11
Dependent Claim
14 words
The thermoplastic compositions of claim 8 wherein said oligomer is a thermotropic poly(ester amide).
References Cited (Backward Citations)
EP0041327A1
Cited
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.