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US4464504A Expired / Lapsed US ⏱️ 0.0 years remaining

Freon-corrosion, impact and cold resistant flame-retardant polystyrene blend containing zeolites having cation(s) of Mg, Co, Sb, or Mo

Assignee: HOTOGEPGYAR JASZBERENY HUNGARY
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Filing: 1983-02-22
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Granted: 1984-08-07
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Expires: 2003-02-22
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Abstract

Abstract The invention relates to a blend, based on polystyrene and/or impact resistant polystyrene, which is stress-corrosion, impact and cold resistant and flame retardant. The blend according to the invention contains 50 to 98 mass % of polystyrene or impact resistant polystyrene, 0.01 to 15 mass % of zeolites with a pore size above 0.43 nm, 2 to 18 mass % of a styrene/butadiene block copolymer, 0 to 15 mass % of a flame retardant and 0 to 2 mass % of a surface-active agent. The properties of the blend can be adjusted between wide limits by a suitable selection of the quality and quantity of the components. The blend can be prepared by the processors themselves, whereby the selection of the available polystyrene types can be considerably increased.

Inventors

  • 👤 Jozsef K. Kocsis
  • 👤 Laszlo Kiss
  • 👤 Zoltan Balajthy
  • 👤 Peter Nagy
  • 👤 Gizella Pai nee Hazkoto
  • 👤 Miklos Zarubai
  • 👤 Geza Sipos
  • 👤 Andras Romhanyi
  • 👤 Rudolf Kokai

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-01 22:55
CPC Classifications
C; C08; C08L; C08L25/00; C08L25/02; C08L25/04; C08L25/06; C08K; C08K3/00; C08K3/34; C08L51/00; C08L51/04; C08L53/00; C08L53/02

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 87 words
A freon-corrosion, impact and cold resistant and flame-retardant polystyrene blend, comprising 50 to 98 mass % of polystyrene or impact resistant polystyrene, 0.01 to 15 mass % of zeolites with a pore size above 0.43 nm, 2 to 18 mass % of a styrene/butadiene block copolymer, 0 to 15 mass % of a flame retardant and 0 to 2 mass % of a surface-active agent, wherein the zeolites contain a cation of Mg--, Co--, Sb-- or Mo--, such cation being introduced into the zeolite by ion exchange.
Claim 2
Dependent Claim 87 words
A freon-corrosion, impact and cold resistant and flame-retardant polystyrene blend, comprising 50 to 98 mass % of polystyrene or impact resistant polystyrene, 0.01 to 15 mass % of zeolites with a pore size above 0.43 nm, 2 to 18 mass % of a styrene/butadiene block copolymer, 0 to 15 mass % of a flame retardant and 0 to 2 mass % of a surface-active agent, wherein the zeolites contain a cation of Mg--, Co--, Sb-- or Mo--, such cation being introduced into the zeolite by ion exchange.
Claim 3
Dependent Claim 40 words
A blend as claimed in claim 1, comprising 80 to 97 mass % of polystyrene, 0.02 to 10 mass % of zeolites of a pore size above 0.43 nm and 2.5 to 10 mass % of a styrene/butadiene block copolymer.
Claim 4
Dependent Claim 33 words
A composition as claimed in claim 1, comprising 86 to 96 mass % of polystyrene, 0.05 to 5 mass % of zeolites and 3 to 9 mass % of a styrene/butadiene block copolymer.
Claim 5
Dependent Claim 26 words
A blend as claimed in claim 1, wherein the styrene content in block form of the styrene/butadiene block copolymer amounts to at least 25 mass %.

References Cited (Backward Citations)

US3245946A Cited
GB1092600A Cited
US3873645A Cited
US4148771A Cited
US4133795A Cited
JPS55116743A Cited
JPS55120641A Cited
JPS55131034A Cited
US4267283A Cited
JPS5734143A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1987-08-07 1988-02-06 1988-08-07 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1991-08-07 1992-02-06 1992-08-07 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1995-08-07 1996-02-06 1996-08-07 $7700.00 Window Closed / Lapsed

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