Classifications

• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L81/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing sulfur with or without nitrogen, oxygen or carbon only; Compositions of polysulfones; Compositions of derivatives of such polymers
  • C08L81/06—Polysulfones; Polyethersulfones

Definitions

• the present invention relates to polyarylsulfone-polycarbonate mixtures of 90% by weight to 60% by weight of linear polyarylsulfone and 10% by weight to 40% by weight of polycorbonate with an Mw (weight average molecular weight) greater than 60,000.
• the mixing ratio is preferably between 85% by weight to 70% by weight of polyarylsulfone and between 15% by weight and 3J% by weight of polycarbonate.
• Such mixtures can be used for the production of cast films (Examples 8 and 9 of the DT-OS and 14 and 16 of US-PS).
• the polycarbonates which are usually suitable for injection molding and extrusion and whose Mw is, for example, about 35,000 are specified as polycarbonates (example 2 of the DT-OS).
• films made from such mixtures show a strong tendency to stress corrosion cracking.
• polyarylsulfone-polycarbonate mixtures according to the invention provide extrusion films with an excellent property profile, even though they contain as the polycarbonate component a polycarbonate that cannot be extruded without reducing the molecular weight and although the mixtures are not suitable for the production of cast films.
• Polyarylsulfones which are suitable according to the invention are in principle all known linear aromatic polysulfones and polyether sulfones with Mw (weight average molecular weight measured for example by means of light scattering) between about 15,000 and about 55,000, preferably between about 20,000 and 4,000.
• Preferred polyarylsulfones are those of the following structural units of the formula (I) obtainable from bisphenols and dihalogenarylsulfones wherein Ar 1 is a biphenylene or oxibiphenylene radical, n 0 or 1, Z is a p-phenylene radical, m-phenylene radical or divalent radical of the following formula.
• R is a divalent C 1 -C 12 alkyl or alkylidene radical, C 5 -C 12 cycloalkylene or cycloalkylidene radical, C 7 -C 12 aralkylene or aralkylidene radical or C 8 -C 12 -Arlene-bise.lkyliden rest or the grouping -O-, -S-, -SO-, -SO 2 -, -CO- or a simple bond.
• the aromatic polycarbonates can be prepared by known methods, e.g. after the melt transesterification process from bisphenol and diphenyl carbonate and the two-phase interface process from bisphenols and phosgene, as described in the above-mentioned literature.
• the aromatic polycarbonates can be branched through the incorporation of small amounts, preferably amounts between 0.05 and 2.0 mol% (based on diphenols used), of three- or more than three-functional compounds, in particular those having three or more than three phenolic hydroxyl groups
• Polycarbonates of this type are, for example le in the German disclosure g ungsschriften 1,570,533, 1,595,762, 2,116,974, 2,113,347 and 2,500,092, British Patent 1,079,821 and U.S. Patent No. 3,544,514 described.
• the weight average molecular weights of the polycarbonates suitable according to the invention should be above 60,000, preferably between 65,000 and 120,000 and in particular between 75,000 and 95,000. (Determined from the intrinsic viscosity, measured in CH 2 Cl 2 solution).
• Aromatic polycarbonates for the purposes of the invention are in particular homopolycarbonates made from bis-2- (4-hydroxyphenyl) propane (bisphenol-A) and copolycarbonates made from at least 30 mol%, preferably at least 60 mol% and in particular at least 80 mol% of bisphenol A and up to 70 mol%, preferably up to 40 mol% and in particular up to 20 mol% from other diphenols.
• bisphenol-A bis-2- (4-hydroxyphenyl) propane
• copolycarbonates made from at least 30 mol%, preferably at least 60 mol% and in particular at least 80 mol% of bisphenol A and up to 70 mol%, preferably up to 40 mol% and in particular up to 20 mol% from other diphenols.
• the molar percentages each refer to the total molar amount of condensed diphenols).
• diphenols bis (4-hydroxyphenyl) methane (bisphenol F), 2,4-bis (4-hydroxyphenyl) butane, 1,1-bis (4-hydroxyphenyl) cyclohexane, 2,2 Bis (3-methyl-4-hydroxyphenyl) propane, bis (3,5-dimethyl-4-hydroxyphenyl) methane, 2,2-bis (3,5-dimethyl-4-hydroxyphenyl) propane 2,4-bis (3,5-dimethyl-4-hydrexyphenyl) -2-methylbutane and 1,1-bis (3,5-dimethyl-4-hydroxyphenyl -) - cyclohexane are suitable.
• Copolycarbonates preferred according to the invention contain bisphenol A and 1,1-bis (4-hydroxyphenyl) cyclohexane (bisphenol Z).
• Preferred mixing processes are processes 2 to 4, and mixing process 4 is particularly preferred.
• Suitable apparatuses for the production of the polycarbonate mixtures according to the invention are rollers, kneading and screw machines.
• Preferred apparatus are screw machines, in particular twin-screw machines.
• the extrusion films can be produced from the blends according to the invention in a known manner, for example on normal, catchy three-zone counters according to the state of the art, with the deformation into films and wide slit nozzles into specialist films, and also via film blowing heads into blown films.
• extrusion films according to the invention have a particularly advantageous property profile, which makes them suitable, for example, for use on the electric sect.
• the extrusion films according to the invention have high mechanical strength, high resistance to stress corrosion cracking in the heat and to organic liquids, high heat resistance and long-term heat resistance.
• they are characterized by their resistance to unsaturated polyester resin solutions.
• additives or fillers known in polycarbonate and polysulfone chemistry can also be added to the mixtures according to the invention.
• dyes such as dyes, pigments, mold release agents, stabilizers against the effects of moisture, heat and UV, lubricants, fillers, such as glass powder, quartz products, graphite, molybdenum sulfide, metal powder, powders of high-melting plastics, e.g. Polytetrafluoroethylene powder, natural fibers such as cotton, sisal and asbestos, furthermore glass fibers of various types, metal threads and fibers which are stable and do not noticeably damage the polycarbonates while they are in the melt of the polycarbonates.
• fillers such as glass powder, quartz products, graphite, molybdenum sulfide, metal powder, powders of high-melting plastics, e.g. Polytetrafluoroethylene powder, natural fibers such as cotton, sisal and asbestos, furthermore glass fibers of various types, metal threads and fibers which are stable and do not noticeably damage the polycarbonates while they are in the melt of the polycarbonates.
• a linear polyarylsulfone produced by condensation of 4,4'-dichlorodiphenyl sulfone and bis-2- (4-hydroxy-plenyl) propane with a M w of 20,000 and 20 wt .-% of a polycarbonate based on bisphenol A with a M w of 95,000 are melted together in a 2-shaft screw, the cylinder temperatures being 340 ° C.
• the enamel is pressed out as a strand.
• the strand is cooled and granulated.
• the granules obtained are melted on a single screw with a degassing zone, and expressed the melt through a slit die and drawn off via a chill roll Arilage to about 40 / um thick Folion.
• the property values obtained are listed in the table below.
• the polymers acc. Example 1 were dissolved together in methylene chloride, the concentration of the polymer mixture in methylonyl chloride being 17% by weight. After filtering and degassing, the solution was poured in a known manner on Tromel casting machines to give approximately 40 ⁇ m thick films. In order to remove the residual solvent content, the film obtained was after-dried at 120 ° C. The properties of the film are listed in the table below.
• Example 1 From 80 wt .-% of a polysulfone acc.
• Example 1 produced and processed on a single-screw screw with a blow head to about 60 microns thick films.
• the cylinder temperatures were 280 ° C in the feed zone and 310 ° C in the following zones.
• the nozzle temperature was also set to 310 ° C.
• the nozzle gap was 0.8 mm.
• the tube was expanded in a ratio of 1: 4.
• the withdrawal speed of the film winder was set so that at the chosen screw speeds the required film thickness of 60 / m was obtained.
• the property values of the film obtained are listed in the attached table.

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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)
• Compositions Of Macromolecular Compounds (AREA)
• Extrusion Moulding Of Plastics Or The Like (AREA)

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• 1978
  • 1978-07-26 EP EP78100510A patent/EP0000733B1/fr not_active Expired
  • 1978-07-26 DE DE7878100510T patent/DE2860233D1/de not_active Expired
  • 1978-07-31 IT IT50545/78A patent/IT1105387B/it active
  • 1978-08-02 JP JP9371978A patent/JPS5428361A/ja active Granted

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