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US3933941A Expired / Lapsed US ⏱️ 0.0 years remaining

Thermoplastic blended composition comprising polyphenylene ether, aromatic polycarbonate and styrene resin

Assignee: Mitsubishi Gas Chemical Co Inc
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Filing: 1974-05-01
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Granted: 1976-01-20
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Expires: 1994-05-01
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Abstract

Abstract A thermoplastic blended composition comprising 15-80% by weight of polyphenylene ether, 5-60% by weight of a styrene resin and 2-15% by weight of an aromatic polycarbonate. The composition has superior heat resistance, fatigue resistance and processability.

Inventors

  • 👤 Eiichi Yonemitsu
  • 👤 Akitoshi Sugio
  • 👤 Masanobu Masu
  • 👤 Masaharu Kimura
  • 👤 Masao Okabe

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-27 12:39
CPC Classifications
C; C08; C08L; C08L25/00; C08L25/02; C08L69/00; C08L71/00; C08L71/08; C08L71/10; C08L71/12; C08L71/123; Y; Y10; Y10S; Y10S525/00; Y10S525/905

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 204 words
A thermoplastic blended resin composition comprising the following resin components: 1. 15 to 80% by weight of a polyphenylene ether having a polymer unit of the general formula ##SPC7## wherein R 1 and R 2 may be in the same or different and represent a methyl or ethyl group and n is a positive integer of at least 50; 2. 5 to 60% by weight of a styrene resin of at least one member selected from the group consisting of styrene homopolymers, styrene copolymers, rubber-modified polystyrenes and high impact polystyrenes and containing at least 70% of structural units of the general formula ##SPC8## wherein R 3 is a hydrogen atom or lower alkyl group, X is a halogen atom selected from chlorine and bromine, and m is zero or integer of 1 or 2; and 3. 2-15% by weight of an aromatic polycarbonate composed of recuring units of the general formula ##SPC9## wherein R 4 and R 5 may be the same or different, and represent a hydrogen atom or a lower alkyl group, and X and m are the same as defined above; the total amount of (1), (2) and (3) being 100% by weight based on the total weight of the resin.
Claim 2
Dependent Claim 204 words
A thermoplastic blended resin composition comprising the following resin components: 1. 15 to 80% by weight of a polyphenylene ether having a polymer unit of the general formula ##SPC7## wherein R 1 and R 2 may be in the same or different and represent a methyl or ethyl group and n is a positive integer of at least 50; 2. 5 to 60% by weight of a styrene resin of at least one member selected from the group consisting of styrene homopolymers, styrene copolymers, rubber-modified polystyrenes and high impact polystyrenes and containing at least 70% of structural units of the general formula ##SPC8## wherein R 3 is a hydrogen atom or lower alkyl group, X is a halogen atom selected from chlorine and bromine, and m is zero or integer of 1 or 2; and 3. 2-15% by weight of an aromatic polycarbonate composed of recuring units of the general formula ##SPC9## wherein R 4 and R 5 may be the same or different, and represent a hydrogen atom or a lower alkyl group, and X and m are the same as defined above; the total amount of (1), (2) and (3) being 100% by weight based on the total weight of the resin.
Claim 3
Dependent Claim 67 words
The composition of claim 1 wherein said polyphenylene ether is selected from the group consisting of poly(2,6-dimethyl-1,4-phenylene)ether and poly(2,6-diethyl-1,4-phenylene)ether, said aromatic polycarbonate is derived from a bisphenol selected from the group consisting of bisphenol A, bisphenol B and nuclearly halogenated bisphenols A, and said styrene resin is at least one member selected from the group consisting of styrene homopolymers, styrene copolymers, rubber-modified polystyrenes and high impact polystyrene.
Claim 4
Dependent Claim 25 words
The composition of claim 1, wherein said aromatic polycarbonate is a carbonate copolymer derived from a mixture of bisphenol A and nuclearly brominated bisphenol A.
Claim 5
Dependent Claim 12 words
The composition of claim 1, wherein said styrene resin includes halogenated polystyrene.
Claim 6
Dependent Claim 21 words
The composition of claim 2, wherein said styrene resin is a rubber-modified polystyrene consisting of a mixture of polybutadiene and polystyrene.
Claim 7
Dependent Claim 13 words
The composition of claim 2, wherein said styrene resin is a styrene copolymer.
Claim 8
Dependent Claim 17 words
The composition of claim 6, wherein said styrene copolymer is a styrene-acrylonitrile copolymer or a styrene-butadiene copolymer.

References Cited (Backward Citations)

US3221080A Cited
US3383435A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1979-01-19 1979-07-21 1980-01-20 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1983-01-19 1983-07-21 1984-01-20 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1987-01-19 1987-07-21 1988-01-20 $7700.00 Window Closed / Lapsed

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