§
PatentCue
Patent Intelligence
Join Waitlist Sign In
← Back to Patent Explorer
EP0312976A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Styrene-based resin composition and process for production of moldings

Assignee: Idemitsu Kosan Co Ltd
•
Filing: 1988-10-18
•
Granted: —
•
Expires: 2008-10-18
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract Styrene-based resin composition containing as main components (A) 100 parts by weight of a styrene-based polymer having mainly a syndiotactic configuration and (B) 0.01 to 25 parts by weight of one or more nucleating agents selected from the group consisting of (1) metal salts of organic acids having an average particle diameter of not more than 50 mu m, (2) inorganic compounds having an average particle diameter of not more than 50 mu m, (3) organophosphorus compounds having an average particle diameter of not more than 50 mu m, and (4) metal salts of ionic hydrocarbon copolymer, and a process for producing styrene-based resin moldings by molding the above styrene-based resin composition at a temperature between room temperature and 200 DEG C. The resin composition of the present invention is suitable for injection molding and extrusion molding, and provides moldings which are of high crystallinity and are excellent in heat resistance, solvent resistance, chemical resistance and so forth.

Inventors

  • 👤 Komei Yamasaki
  • 👤 Takashi Sumitomo
  • 👤 Toshikazu Ijitsu
  • 👤 Hiroshi Yamada
  • 👤 Toshihiro Furusawa

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-29 03:16
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/52; C08K5/521; C08K5/523; C08K3/00; C08K3/34; C08K5/04; C08K5/09; C08K5/098; C08K5/527; C08L; C08L25/00; C08L25/02

Claims Analysis

Total Claims: 10
Claim 1
Independent Claim 95 words
A styrene-based resin composition containing as main components (A) 100 parts by weight of a styrene-based polymer having mainly a syndiotactic configuration and (B) 0.01 to 25 parts by weight of one or more nucleating agents selected from the group consisting of (1) metal salts of organic acids having an average particle diameter of not more than 50 µm, (2) inorganic compounds having an average particle diameter of not more than 50 µm, (3) organophosphorus compounds having an average particle diameter of not more than 50 µm, and (4) metal salts of ionic hydrocarbon copolymer.
Claim 2
Dependent Claim 95 words
A styrene-based resin composition containing as main components (A) 100 parts by weight of a styrene-based polymer having mainly a syndiotactic configuration and (B) 0.01 to 25 parts by weight of one or more nucleating agents selected from the group consisting of (1) metal salts of organic acids having an average particle diameter of not more than 50 µm, (2) inorganic compounds having an average particle diameter of not more than 50 µm, (3) organophosphorus compounds having an average particle diameter of not more than 50 µm, and (4) metal salts of ionic hydrocarbon copolymer.
Claim 3
Dependent Claim 35 words
A composition as claimed in Claim 1 wherein the amount of (1) the metal salts of organic acids is 0.01 to 15 parts by weight per 100 parts by weight of the styrene-based polymer (A).
Claim 4
Dependent Claim 32 words
A composition as claimed in Claim 1 wherein the amount of (2) the inorganic compounds is 0.01 to 10 parts by weight per 100 parts by weight of the styrene-based polymer (A).
Claim 5
Dependent Claim 32 words
A composition as claimed in Claim 1 wherein the amount of (3) the organophosphorus compounds is 0.01 to 15 parts by weight per 100 parts by weight of the styrene-based polymer (A).
Claim 6
Dependent Claim 36 words
A composition as claimed in Claim 1 wherein the amount of (4) the metal salts of ionic hydrocarbon copolymer is 0.1 to 25 parts by weight per 100 parts by weight of the styrene-­based polymer (A).
Claim 7
Dependent Claim 20 words
A composition as claimed in Claim 1 wherein (3) the organophosphorus compound is sodium methylenebis(2,4-di-tert-­butylphenol)acid phosphate or sodium bis(4-tert-butylphenyl) phosphate.
Claim 8
Dependent Claim 19 words
A composition as claimed in Claim 1 wherein (1) the metal salt of organic acid is aluminum p-(tert-butyl) benzoate.
Claim 9
Dependent Claim 14 words
A composition as claimed in Claim 1 wherein (2) the inorganic compound is talc.
Claim 10
Dependent Claim 26 words
A process for producing a styrene-based resin molding which comprises molding the styrene-based resin composition of Claim 1 at a temperature between room temperature and 200°C.

References Cited (Backward Citations)

No citation records indexed.

USPTO Annuity & Maintenance Windows

Maintenance schedule is calculated for granted US utility patents.

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag