← Back to Patent Explorer
US4539370A Expired / Lapsed US ⏱️ 0.0 years remaining

Thermoplastic moulding compositions

Assignee: Bayer AG
•
Filing: 1984-07-17
•
Granted: 1985-09-03
•
Expires: 2004-07-17
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract The present invention relates to thermoplastic moulding compositions of (A) thermoplastic polycarbonates, mixed with (B) thermoplastic polyalkylene terephthalates and, if appropriate, with (C) elastomeric polymers, which are characterized in that they contain (D) a thermoplastic based on a polyether-imide.

Inventors

  • 👤 Werner Nouvertne
  • 👤 Wolfgang Stix

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-04 06:51
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02; C08L69/00; C08L51/00; C08L51/04; C08L79/00; C08L79/04; C08L79/08

Claims Analysis

Total Claims: 12
Claim 1
Independent Claim 196 words
Thermoplastic moulding compositions containing (A) 95 to 50 parts by weight of thermoplastic, aromatic polycarbonates obtained from at least one of hydroquinone, resorcinol, dihydroxy-diphenyls, bis-(hydroxypenyl)-C 1 -C 8 -alkanes, bis-(hydroxyphenyl)-C 5 -C 6 -cycloalkanes, bis-(hydroxyphenyl) sulphides, bis-(hydroxyphenyl) ethers, bis-(hydroxyphenyl) ketones, bis-(hydroxyphenyl) sulphoxides, bis-(hydroxyphenyl) sulphones or α,α'-bis-(hydroxyphenyl)-diisopropylbenzenes with weight-average molecular weights M w between 10,000 and 200,000 with M w determined by means of light scattering, (B) 50 to 5 parts by weight of thermoplastic polyalkylene terephthalate, (C) 3 to 15 parts by weight of an elastomeric polymer obtained by polymerizing at least two monomers selected from chloroprene, butadiene, isoprene, isobutene, styrene, acrylonitrile, ethylene, propylene, vinyl acetate and (meth)acrylate esters of alcohols having 1-8 carbon atoms, and having a glass transition temperature of less than -20° C.; the sum of the parts by weight of (A)+(B)+(C) in each case being 100 parts by weight, characterized in that the polycarbonate component (A) contains 2 to 16% by weight based on the sum of (A)+(D), of (D) which is a thermoplastic polyether-imide of the formula ##STR2## wherein "n" is the degree of polymerization, which corresponds to a number-average molecular weight (M n ) of between 10,000 and 50,000 g/mol.
Claim 2
Dependent Claim 196 words
Thermoplastic moulding compositions containing (A) 95 to 50 parts by weight of thermoplastic, aromatic polycarbonates obtained from at least one of hydroquinone, resorcinol, dihydroxy-diphenyls, bis-(hydroxypenyl)-C 1 -C 8 -alkanes, bis-(hydroxyphenyl)-C 5 -C 6 -cycloalkanes, bis-(hydroxyphenyl) sulphides, bis-(hydroxyphenyl) ethers, bis-(hydroxyphenyl) ketones, bis-(hydroxyphenyl) sulphoxides, bis-(hydroxyphenyl) sulphones or α,α'-bis-(hydroxyphenyl)-diisopropylbenzenes with weight-average molecular weights M w between 10,000 and 200,000 with M w determined by means of light scattering, (B) 50 to 5 parts by weight of thermoplastic polyalkylene terephthalate, (C) 3 to 15 parts by weight of an elastomeric polymer obtained by polymerizing at least two monomers selected from chloroprene, butadiene, isoprene, isobutene, styrene, acrylonitrile, ethylene, propylene, vinyl acetate and (meth)acrylate esters of alcohols having 1-8 carbon atoms, and having a glass transition temperature of less than -20° C.; the sum of the parts by weight of (A)+(B)+(C) in each case being 100 parts by weight, characterized in that the polycarbonate component (A) contains 2 to 16% by weight based on the sum of (A)+(D), of (D) which is a thermoplastic polyether-imide of the formula ##STR2## wherein "n" is the degree of polymerization, which corresponds to a number-average molecular weight (M n ) of between 10,000 and 50,000 g/mol.
Claim 3
Dependent Claim 24 words
Thermoplastic moulding compositions according to claim 1 wherein the polycarbonate (A) is obtained from 4,4'-dihydroxy-diphenyl, 2,4-bis-(4-hydroxyphenyl)-2-methylbutane, αα'-bis-(4-hydroxyphenyl)-p-diisopropylbenzene, bis-(4-hydroxyphenyl) ether, bis-(4-hydroxyphenyl) sulphone and bis-(4-hydroxyphenyl) ketone.
Claim 4
Dependent Claim 20 words
Thermoplastic moulding compositions according to claim 1 wherein the polycarbonate (A) is obtained from 2,2-bis-(4-hydroxyphenyl)-propane, bis-(hydroxyphenyl)-methane, bis-(4-hydroxyphenyl) sulphone and 1,1-bis-(4-hydroxyphenyl)-cyclohexane.
Claim 5
Dependent Claim 17 words
Thermoplastic moulding compositions according to claim 1 wherein the elastomeric polymer (C) is an ethylene/vinyl acetate copolymer.
Claim 6
Dependent Claim 18 words
Thermoplastic moulding compositions according to claim 1 wherein the elastomeric polymer (C) is ethylene/propylene copolymer or ethylene/propylene/diene terpolymers.
Claim 7
Dependent Claim 27 words
Thermoplastic moulding compositions according to claim 1 wherein the elastomeric polymer (C) is a block copolymer of styrene, α-methyl styrene or vinyl toluene with butadiene or isoprene.
Claim 8
Dependent Claim 29 words
Thermoplastic moulding compositions according to claim 1 wherein the elastomeric polymer (C) is polybutadienes, butadiene/styrene copolymers and Poly-(meth)-acrylates which are grafted with styrene, acrylonitrile, alkyl(meth)acrylates or a mixture thereof.
Claim 9
Dependent Claim 28 words
Thermoplastic moulding compositions according to claim 7 wherein the elastomeric component (C) is a graft polymer of a mixture of styrene and acrylonitrile grafted onto a crosslinked polybutadiene.
Claim 10
Dependent Claim 21 words
Thermoplastic moulding compositions according to claim 4 wherein the ethylene copolymer is a terpolymer of ethylene, acrylic acid and tert-butyl acrylate.
Claim 11
Dependent Claim 32 words
Moulding compositions according to claim 1 comprising components (A)+(B)+(D) and (C), which also additionally contain ethylene homopolymers or copolymers, lubricants, mould release agents, nucleating agents, stabilisers, fillers, reinforcers, flame-proofing agents or dyestuffs.
Claim 12
Dependent Claim 57 words
Process for the preparation of the moulding comspositions of claim 1 wherein components (A) and (D) are homogenised in a suitable mixing unit at temperatures between 290° C. and 350° C. and the mixture is then granulated, and component (B) and componet (C) are admixed in a further operation at temperatures between 260° C. and 290° C.

References Cited (Backward Citations)

US4250279A Cited
US4430484A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1988-09-02 1989-03-04 1989-09-03 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1992-09-02 1993-03-04 1993-09-03 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1996-09-02 1997-03-04 1997-09-03 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag