Classifications

• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L71/00—Compositions of polyethers obtained by reactions forming an ether link in the main chain; Compositions of derivatives of such polymers
  • C08L71/08—Polyethers derived from hydroxy compounds or from their metallic derivatives
  • C08L71/10—Polyethers derived from hydroxy compounds or from their metallic derivatives from phenols
  • C08L71/12—Polyphenylene oxides
  • C08L71/123—Polyphenylene oxides not modified by chemical after-treatment
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K3/00—Use of inorganic substances as compounding ingredients
  • C08K3/34—Silicon-containing compounds
  • C08K3/346—Clay

Definitions

• This invention relates to clay filled polychenylene ether co-positions , and more specifically, to co-positions co-posed of polyphenylene ther , an impact modifier and a piasticizer which also contain clay particles characterized by a certain specified particle size and surface area .
• the p olyphenylene ether resins are well known in the art a s comprising a family of thermoplastic material which are suitable for various engineering purposes. These m ay be made by catalyzed and non-catalyzed processes described in the patent literature.
• polystyrene resins may be admixed with polystyrene, either unmodified or modified, to produce compositions having properties better than chose of either of the two polymers individually.
• compositions containing a polyphenylene ether resin and polystyrene comprising a polyphenylene ether resin, a rubber modified high impact pelystyrene and aluminum silicate are disclosed in U.S. 4,156,312.
• Copendiag application Serial Ho. 755,025, filed December 28, 1976 discloses compositions cosprising a polyphenylene ether resin, alone, or in combination vith an impact modifier which is not a high impact rubber modified polystyrene, a mineral filler and a piasticizer.
• particulate clay and specifically clay having a mean particle size of less than 0.6 micrometer (micron) and a surface area of 15 square meters per gram (m 2 /g) or more dramatically improves the Gardner impact strength of certain polyphenylene ether compositions. These compositions are described below.
• thermoplastic compositions having improved impact strength when molded comprising:
• a particulate clay filler having a mean particle size of less than 0.6 micron and a surface area of at least 15 square meters per gram.
• the particulate clay filler is substantially free of large, gritty particles and has been well dispersed to avoid the formation of limps.
• the presence of grit and clumps may cause stress concentrations in the clayresin composites which lower the impact resistance and also other physical properties.
• the clay filler of the compositions of this invention can be prepared by conventional methods, using, e.g., sieving means to separate and collect clay particles having the appropriate size, preferably 0.1 to 0.5 micron and surface area, preferably 15 to 30.m 2 /g, and to separate gritty particles and clumps.
• the preferred polyphenylene ether resins are those having the formula:
• n is a positive integer and is at least 50
• each Q is a monovalent substituent selected from the group consisting of hydrogen halogen, hydrocarbon radicals free of a tertiary aipha-carhon atom, halohydrocarbon radicals having at least two carbon atoms between the halogen atom and the phenyl nucleus, hydrocarbonoxy radicals and halohydrocarbonoxy radicals having at least two carbon atoms between the halogen atom and the phenyl nucleus.
• the preparation of polyphenylene ether resins corresponding to the above formula is described in the abovementioned patents of Hay and Stama toff .
• test preferred polyphenylene ether resin for use in this invention is poly (2, 6-diaethyl-1,4- ⁇ henylene) ether.
• the particular iispact modifier employed in the cospositions is not critical and can be selected from a vide variety of elastomeric materials .
• the term "impact modifier" employed herein includes copolymers of styrene and elastomeric materials such as acrylonitrile, EPDM rubber, maleic anhydride or diene rubber, Exasples include copolymers of styrene and acrylonitrile, copolymers of styrene and butadiene, copolymers of styrene and maleic anhydride and copolymers of styrene and EPDM rubber.
• terpolymers of styrene acrylonitrile and butadiene
• terpolymers of styrene, butadiene and styrene of the A-3-A type or radial teleblock type either hydrogenated or unhydrogenated.
• terminal blocks A and A 1 are the same or different and are derived from a vinyl aromatic compound, e. g. , styrene, ⁇ -methyl styrene , vinyl toluene, vinyl sylene , vinyl naphthalene, and the like
• center block 3 is derived from a conjugated diene , i. e. , butadiene , isoprene , 1, 3-pentadiene , 2 , 3- dimethyl butadiene, and the like.
• Hydrogenated derivatives of the foregoing are also preferred.
• the piasticizer can be selected from among any materials known to impart compatibility with polyphenylene ether resin.
• the plasticizer is an aromatic phosphate, and especially a compound having the formula:
• R 1 , R 2 and R 3 are the same or different and are alkyl, haioalkyl, cycioalkyl, halocycloalkyl, aryl, haloaryl, alkyl substituted aryl, haioalkyl substituted aryl, aryl substituted alkyl, haloaryl substituted alkyl, hydroryalkyl, hydroxyaryl, hydroxyalkaryl, halogen and hydrogen.
• cresyl diphenyl phosphate examples include cresyl diphenyl phosphate, 2-ethylhexyl diphenyl phosphate, tricresyl phosphate, triiscprcpylphenyl phosphate, triphenyl phosphate, triethyl phosphate, ⁇ ibutyl phenyl phosphate, diethyl phosphate, cresyl diphenyl phosphate, isooctyl diphenyl phosphate, trihuryl phosphate, 2-ethylhexyl diphenyl phosphate, isodecyl diphenyl phosphate, isodecyl dicresyl phosphate, didecyl cresyl phosphate, tri-nhexyl phosphate, di-n-octyl phenyl phosphate, di-2-ethyl-hexyl phenyl and tri-2-ethyl
• compositions of this invention can vary widely.
• the compositions contain from 5 to 95 parts by weight of polyphenylene ether, from 95 to 5 parts by weight of impact modifier, from 5 to 50 parts by weight of piasticizer and from 5 to 50 parts by weight of clay.
• ingredients such as stabilizers, flame retardant agents, drip retardands, antioxidants, antistatic agents, coloring agents, pigments, mold release agents, and the like, can also be included for their conventionally employed purposes.
• compositions of this invention are prepared in aay manner, usually, however, the ingredients are formed into a preblend by tumbling in a mixer, the preblend is extruded at a temperature of from 550o7. to 620oF., the extrudate is cut into smaller pieces, and the pieces are injection molded at a temperature of from 530o7. to 640o7.
• compositions according to this invention are prepared by tumbling the ingredients , extruding the resulting blend in a Werner Pfleiderer 28 so twin screw machine , at a temperature of 590o7. and inj ection molding the extrudate in a Newbury injection mol ⁇ ias machine at 500o7. (mold temperature 18CoF.).
• compositions are evaluated for physical properties according to ASTM standards. The compositions and properties are reported in Tables I and II.
• compositions Comprising a Polyphenylene Ether Reain, an A-B-A Block Copolymer, Triphenyl Phosphate and Clay Filler
• Hulok 321 b (clay) - - 25 - - - - -
• compositions according to the invention 1, 8, 9, 10 and 11, eaeh containing clay having a mean particle size no greater than 0.6 micron and a surface area of at least 15 m 2 /g. provide clearly better Gardner impact strength is comparison with the compositions containing a clay filler not is accordance with the invention, 2-7 inclusive and 12-14 inclusive.

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• Chemical & Material Sciences (AREA)
• Health & Medical Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Medicinal Chemistry (AREA)
• Polymers & Plastics (AREA)
• Organic Chemistry (AREA)
• Dispersion Chemistry (AREA)
• Compositions Of Macromolecular Compounds (AREA)

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Citations (6)

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• 1980
  • 1980-11-24 US US06/209,797 patent/US4317761A/en not_active Expired - Lifetime
• 1981
  • 1981-11-23 WO PCT/US1981/001548 patent/WO1982001883A1/en not_active Ceased
  • 1981-11-23 JP JP57500229A patent/JPS57502063A/ja active Pending
  • 1981-11-23 EP EP82900197A patent/EP0065009B1/en not_active Expired
• 1986
  • 1986-12-10 AU AU66397/86A patent/AU6639786A/en not_active Abandoned

Patent Citations (6)

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