Patent EP0451563A2 successfully refreshed from Google Patents.
EP0451563A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Thermoplastic compositions based on polyphenylene ether and polyamide
Assignee: Enichem SpA
•
Filing: 1991-03-20
•
Granted: —
•
Expires: 2011-03-20
Abstract
Abstract Described are thermoplastic compositions having a good balance of mechanical and thermal properties, a highly satisfactory impact strength and a good processability, comprising: (a) a functionalized polyphenylene ether; (b) a polyamide; (c) an olefinic elastomer containing a vinylaromatic monomer grafted thereon.
Inventors
- 👤 Domenico Dr. Economy Vianello
- 👤 Armando Benetton
- 👤 Alessandro Dr.-Chem. Moro
- 👤 Roberto Dr.-Chem. Pippa
- 👤 Aldo Dr.-Chem. Longo
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 19:26
CPC Classifications
C; C08; C08L; C08L71/00; C08L71/08; C08L71/10; C08L71/12; C08L71/126; C08L51/00; C08L51/06; C08L51/08; C08L77/00
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
84 words
A thermoplastic composition comprising a resin composition of: (A) from 5 to 95% by weight of polyphenylene ether functionalized with a compound containing at least one carbon-carbon double or triple bond and at least one group selected from carboxylic acid, anhydride, amide, imide, ester, amino and hydroxy groups; and (B) from 95 to 5% by weight of polyamide; and (C) from 1 to 100 parts by weight, per 100 parts by weight of mixture (A)+(B), of olefinic elastomer having a vinylaromatic monomer grafted thereon.
Claim 2
Dependent Claim
61 words
Composition according to claim 1, wherein the proportions of components (A), (B) and (C), calculated on the total composition, are: (a) from 25 to 70% by weight of functionalized polyphenylene ether (A); (b) from 25 to 70% by weight of polyamide (B), and (c) from 5 to 50% by weight of olefinic elastomer (C); the sum (A)+(B)+(C) being equal to 100%.
Claim 3
Dependent Claim
35 words
Composition according to anyone of claims 1 and 2, wherein the content of vinylaromatic monomer in the olefinic elastomer (C) is at least 1% by weight and preferably ranges from 30 to 60% by weight.
Claim 4
Dependent Claim
120 words
Composition according to anyone of the preceding claims, wherein the polyphenylene ether (i) is a polymer or copolymer containing a plurality of structural units of general formula (I): wherein R₁, R₂, R₃ and R₄ independently represent a substituted or unsubstituted C₁-C₁₈ hydrocarbon radical, halogen or hydrogen; or (ii) has the general formula (II): wherein R'₁ and R'₂ independently are alkyl radicals containing from 1 to 4 carbon atoms and n is at least 50 and preferably ranges from about 60 to about 600; and preferably is poly(2,6-dimethyl-1,4-phenylene)ether having a number average molecular weight ranging from about 5,000 to about 120,000 and an intrinsic viscosity of at least 0.1 dl/g,particularly from 0.30 to 0.90 dl/g, as measured in chloroform at 23°C.
Claim 5
Dependent Claim
23 words
Composition according to anyone of the preceding claims, wherein the functionalizing compound is selected from maleic anhydride, maleimide, fumaric acid and mixtures thereof.
Claim 6
Dependent Claim
34 words
Composition according to anyone of the preceding claims, wherein the amount of functionalizing compound ranges from 0.01 to 5, preferably 0.1 to 3 parts by weight per 100 parts by weight of polyphenylene ether.
Claim 7
Dependent Claim
17 words
Composition according to anyone of the preceding claims, wherein the polyamide is nylon 6 and/or nylon 6,6.
Claim 8
Dependent Claim
45 words
Composition according to anyone of the preceding claims, wherein the olefinic elastomer is a rubber-like copolymer, having a Mooney viscosity (ML-4) at 100°C ranging from 10 to 150, of at least two different alpha-mono-olefins and at least one copolymerizable polyene monomer, preferably a non-conjugated diene.
Claim 9
Dependent Claim
32 words
Composition according to claim 8, wherein one alpha-mono-olefin is ethylene and the weight ratio of ethylene to the at least one other alpha-mono-olefin is in the range of from 20/80 to 80/20.
Claim 10
Dependent Claim
73 words
Composition according to anyone of the preceding claims, wherein the olefinic elastomer is an ethylene/propylene/non-conjugated diene terpolymer wherein the diene content ranges from about 2 to about 20% by weight and preferably from about 8 to about 18% by weight, calculated on the terpolymer, said terpolymer having a Mooney viscosity (ML-4) at 100°C of from 30 to 90 and a iodine number of at least 5 and preferably ranging from 10 to 40.
Claim 11
Dependent Claim
58 words
Composition according to anyone of the preceding claims, wherein the vinylaromatic monomer has the general formula (V): wherein: X represents hydrogen or an alkyl radical having from 1 to 4 carbon atoms; Y represents halogen or an alkyl radical having from 1 to 4 carbon atoms; and n is 0 or an integer ranging from 1 to 5.
Claim 12
Dependent Claim
47 words
Composition according to anyone of the preceding claims, wherein the vinylaromatic monomer is partially grafted onto the rubber-like substrate and partially forms a polymer in physical admixture with the grafted polymer, said vinylaromatic polymer preferably having an average molecular weight of from about 100,000 to about 2,000,000.
Claim 13
Dependent Claim
31 words
Composition according to claim 12,wherein the amount of grafted vinylaromatic monomer ranges from 10 to 50% by weight and the amount of free polymer ranges from 20 to 50% by weight.
Claim 14
Dependent Claim
20 words
Composition according to anyone of the preceding claims, containing, in addition, reinforcing additives, antiflame agents, dyestuffs, pigments, stabilizers and/or lubricants.
Claim 15
Dependent Claim
46 words
Composition according to claim 14, wherein the reinforcing additive is selected from glass fibres, carbon fibres, organic and inorganic high-modulus fibres and metal fibres, in an amount not higher than 50% by weight and preferably not higher than 30% by weight, calculated on the total composition.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.