• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    8CH-2095 There are provided thermoplastic compositions comprising a low molecular weight polyphenylene ether resin which has an intrinsic viscosity of less than about 0.4, preferably less than 0.33 deciliters/gram as measured in chloroform at 30.degree.C., a styrene resin and an elastomeric block copolymer of a vinyl aromatic compound and a conjugated diene. The compositions are moldable to articles having good impact resistance.
    公开号:SU860710A1
    申请号:SU772556497
    申请日:1977-12-21
    公开日:1981-08-30
    发明作者:Катчман Артур；Фан Ли(Младший) Джим
    申请人:Дженерал Электрик Компани (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to the production of plastics, in particular to thermoplastic molding compositions based on polyphenylene ether resins, and can be used in the chemical industry. The known thermoplastic formova for the composition consisting of polyphenylene ether resin, in particular poly (2, b-dimethylphenylene) ether and polystyrene resin 1, The disadvantage of this composition is relatively low impact strength. The thermoplastic molding composition is closest to the proposed technical essence. consisting of poly (2,6-dimethyl-1, 4-phenylene) ether polystyrene resin selected from a group containing polystyrene and rubber-modified polystyrene, and an elastomeric block copolymer of type A-B-A, dd e A and A are polystyrene blocks; B - a polybutadiene block or a hydrogenated polybutadiene block, the molecular weight of B being higher than the total molecular weight of A, and the poly- (2,6-dimethyl-1, 4-phenylene) ester used here has a true viscosity Chloroform polymer stretcher with in the range of 0.4-0.6 dl / g 12. The disadvantage of this composition is relatively low impact strength (not more than 11 kg-cm / cm cut (Izod). The purpose of the invention is to increase the impact strength of the composition The goal is achieved by the fact that a thermoplastic molding composition consisting of whether a (2,6-dimethyl-1,4-phenylene) ether, a polystyrene resin selected from the group consisting of polystyrene and rubber-modified polystyrene, and an A-B-A elastomeric block copolymer, where A and A are the same or different Polybuta B blocks - a polybutadiene block or a hydrogenated polybutadiene block, the molecular weight of B being higher than the total molecular weight of A and A, containing poly- (2,6-dimethyl-1,4-phenylene) ether with true viscosity, measured in polymer solution. in chloroform at, in the range of 0.270, 31 dl / g in the following ratio ntov, wt.h: Poly- (2,6-dimethyl-1,4-phenylene) ether 10-40
    Polystyrene resin 5S-66 Elastomeric block copolymer 5-25 Polyphenylene ethers are low molecular weight resins. The true viscosity of such a resin, measured in chloroform solution at 30 ° C, is 0.27-0.31 dl / rj
    The ratio of comonomers in the block copolymer can vary over a wide range, as long as the molecular weight of the central block remains greater than the total molecular weight of the end blocks. The molecular weight of the end block is preferable to choose 2000-100000, and the molecular weight of the central unit is in the range of 25,000 to 1,000,000.
    The proposed compositions also include hydrogenated ABA block copolymers, especially block copolymers of this type, in which the average unsaturation of the central block B is reduced to less than 20% of its initial value. In the case of hydrogenated block copolymers, it is preferred to prepare end blocks A and A having an average molecular weight of from 4,000 to 115,000, and a central block of B with an average molecular weight of from 20,000 to 450,000.
    Hydrogenated block copolymers are preferred since they typically provide better thermal stability and flow properties, such as melt viscosity, elevated temperatures, than unhydrogenated block copolymers.
    Mixtures of non-hydrogenated and hydrogenated A-B-A block copolymers can also be used as a component, for example, 1-99 parts by weight, non-hydrogenated A-B-A block copolymer and 99-1 parts by weight can be used. hydrogenated ABA block copolymer.
    Other ingredients may also be used, such as pigments, dyes, flame retarders, plant retarders, plasticizers, antioxidants, reinforcing agents, fillers, and the like.
    A preferred reinforcing agent is one that includes glass fiber. Threads can be produced by standard methods, for example, steam or air blown, blown flame and mechanical stretch, it is preferable to use mechanical stretch. Thread diameters ngisod tf in the range 0.0003Q, 0019 cm.
    The length of the fiberglass, as well as whether it is connected into threads, and those in turn into yarn, cables or bundles, or twisted into mats, etc., is not important for the proposed composition. However, when making molding compositions, it is convenient to use glass fibers in the form of crushed glass fibers of a length of 0.3185, 08 cm. On the other hand, even shorter lengths occur in products formed from such compositions, since significant grinding occurs during mixing. preferably, since the best properties are thermoplastic articles obtained by injection molding in which the lengths of the filaments lie in the range of 0.00001270, 318 cm.
    Generally, the best properties are obtained if glass fiber reinforcement is at least 1-80 parts by weight. per 100 weight.h. resin.
    In cases where it is desired to prepare self-extinguishing compositions, flame retardant agents may be added.
    Preferred flame retardants that contain aromatic carbonate homopolymers or aromatic carbonate copolymers in which 25-75% by weight of repeating units include chlorine or bromo-di-diges ofenol, glycol or dicarboxylic acid units.
    The amount of additive is 0.5 to 50 parts by weight. 10 weight.h. resin.
    The proposed composition can be obtained by mixing the components with the formation of a preliminary mixture by passing the latter through an extruder at elevated temperatures, for example at 218.3-337.8 C, cooling and grinding the extrudate into tablets and molding them into the desired shape.
    Examples 1-4. A mixture of poly- (2, b-dimethyl-1,4-phenylene ether) resin having a true viscosity of 0.27 dl / g, measured in chloroform at 30 ° C, styrene mixture (DyRene 8 GarcoCo, crystalline homopolystyrene) and hydrogenated styrene J5 Y-spatio styrene a block copolymer (Krotton G 6521, SheeC Chem. Co) is prepared and molded at 5,287.8 ° C (form temperature 82.2 ° C) and tested for impact matching.
    The composition of the formulations and the test results are presented in table. one.
    Table
    Hydrogenated styrene-styrene block copolymer
    Properties
    Impact viscosity, measured by Izd coprSF, kg-cm / cm notch 14.8 Examples 5t7. A mixture of poly (2,6-dimethyl-1,4-phenylene 20N) ester with a true viscosity of 0.31 l / g, measured in chloroform at 30 ° C, of a rubber-modified polystyrene resin with high resistance to strike 25 (FG 834, Foster Grant With styrene Ingredients, weight, h. Poly-2,6-dimethyl-1,4-phenylene) ether
    Modified rubber polystyrene resin, possessing high strength to
    impact strike
    Unhydrogenated styrene butadiene styrene block copolymer
    Hydrogenated styrene-butadiene-styrene block copolymer
    Triphenyl Phosphate
    Properties
    Tension at stretching, kg / s Elongation at stretching,%
    Impact viscosity at Izod, kg.cm / cm notch
    Impact viscosity by Gardner
    Viscosity in the melt at 282.2 ° С and 1500 s, 11
    K - 1101, Sheee Chem. Co Kratton G 6521. SheZi Chem. Co
    250
    200
    200
    250
    28.6 17.6 28.6
    table 2
    40
    40
    60 2.5
    60
    2.5
    5 13 13
    0.42 0.41
    67 63
    51.1 8.1
    52.5 78.5
    725 550 styrene-butadiene block copolymer; and trifekyl phosphate, form them with. at 287, (temperature of the form 82,) and evaluate the physical properties of these mixtures. The composition of the formulations and their properties are presented in table. 2
    As can be seen from the examples, the proposed composition, as compared with the known composition, has a higher impact resistance.
    权利要求:
    Claims (2)
    [1]
    1. US patent 3383435, cl. 260-874, published. 1968.
    [2]
    2.Patent of France I 2160963,
    1973, (Protogram. 260-874j publication,
    type of) .
    类似技术:
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    US3835200A|1974-09-10|Composition of a polyphenylene ether, a rubber styrene graft copolymer and normally rigid block copolymer of a vinyl aromatic compound and a conjugated diene
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    同族专利:
    公开号 | 公开日
    AU3183777A|1979-06-28|
    IT1087942B|1985-06-04|
    GB1559263A|1980-01-16|
    CA1119743A|1982-03-09|
    MX146038A|1982-05-04|
    NL7713134A|1978-06-26|
    AU517921B2|1981-09-03|
    DD133963A5|1979-01-31|
    JPS5382857A|1978-07-21|
    BR7708517A|1978-08-08|
    DE2751329A1|1978-06-29|
    FR2375294A1|1978-07-21|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE2434848C2|1973-08-13|1986-09-04|General Electric Co., Schenectady, N.Y.|Thermoplastic mass|
    US3994856A|1973-11-09|1976-11-30|General Electric Company|Composition of a polyphenylene ether and a block copolymer of a vinyl aromatic compound and a conjugated diene|US4313864A|1980-01-21|1982-02-02|General Electric Company|Polyphenylene oxide/plasticizer/hydrogenated radial teleblock copolymer blends|
    JPS6162551A|1984-09-03|1986-03-31|Asahi Chem Ind Co Ltd|Polyphenylene ether resin composition with high solvent resistance|
    JP2502989B2|1986-11-18|1996-05-29|三菱化学株式会社|Resin composition|
    JPH0776301B2|1986-11-19|1995-08-16|三菱化学株式会社|Thermoplastic resin composition|
    DE3736852A1|1987-10-30|1989-05-11|Basf Ag|THERMOPLASTIC MOLDS BASED ON POLYPHENYLENE ETHER|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    US75354276A| true| 1976-12-22|1976-12-22|
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