Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1997-11-20
2000-03-28
Warzel, Mark L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525 66, 525 68, 525 71, 525 92D, 525132, 525151, 525152, 525171, 525299, 525301, 524505, 524538, C08L 5302, C08L 7100, C08L 7700
Patent
active
060433159
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a functionalized copolymer of the formula carbon atoms, atoms, groups and
Inhapak, J. W. Barlow and Paul, Terminal Anhydride Functionalization of Polystyrene, J. of Polymer Science, Part A, Polymer Chemistry, 29 (1993), 1329-1338 describe the preparation of terminally anhydride-functionalized polystyrene. Styrene is subjected to anionic polymerization and the resulting polystyryllithium is directly coupled with trimellitic an hydride chloride (TMAC) at the end of the i onic polymerization of styrene. The degree of functionalization of the polymer is not more than 61% in this direct functionalization. TMAC-functionalized polystyrenes were also obtained by reacting hydroxyl-terminated polystyrene and TMAC. In this reaction for the indirect functionalization, degrees of functionalization of up to 85% are achieved. However, the feasibility of the process depends on the availability of hydroxyl-terminated polymer, which is obtainable by anionic polymerization and subsequent reaction to with ethylene oxide at the end of the polymerization (R. P. Quirk and J. -J. Ma, J. Polym. Sci. Polym. Chem. Ed. 26 (1988), 2031). Polystyrenes functionalized in this manner can be used for compatibilizing the polymer blend components for the in situ formation of block copolymers in polymer blends.
The indirect functionalization has the disadvantage that toxicologically unsafe ethylene oxide has to be used in the process.
Reinforced blends of PPE and high impact polystyrene, which are used as molding materials in many areas of industry, are known per se. In many applications, high tensile strength and flowability of the material are decisive.
DE 31 18 629 A1 discloses molding materials comprising polyphenylene ethers and high impact styrene polymers, which molding materials contain, as a further component, a polyorganosiloxane to impart high flowability to the molding material. If these molding materials are reinforced, the rigidity of the reinforced molding material is not sufficiently large for all applications.
EP-B1 0 214 400 describes resin compositions comprising polyphenylene ether resin and styrene resin, which compositions additionally have a cyclopentadiene resin which contains a polar group in order to improve the flowability of the resin composition. In this resin composition, too, the mechanical properties are unsatisfactory for many applications.
EP-A 0 319 833 describes reinforced thermoplastic molding materials which contain polyphenylene ether, a high impact polystyrene polymer and a further copolymer of styrene and tert-butyl acrylate. The copolymer of styrene and tert-butyl acrylate serves for improving the mechanical properties, but the molding material has insufficient flowability.
It is an object of the present invention to provide a functionalized copolymer of vinylaromatic monomers and alkadiene monomers.
It is a further object of the present invention to provide a functionalized copolymer of vinylaromatic monomers and alkadiene monomers, the degree of functionalization being as high as possible.
It is a further object of the present invention to provide a functionalized polymer of vinylaromatic monomers and alkadiene monomers, the functionalization involving no fundamental ethylene oxide building blocks.
It is a further object of the present invention to provide a process for the preparation of the functionalized copolymers.
It is a further object of the present invention to provide a process for the preparation of the functionalized copolymers, the use of toxicologically unsafe ethylene oxide being dispensed with.
It is a further object of the present invention to provide reinforced thermoplastic molding materials which have great rigidity and toughness.
It is a further object of the present invention to provide reinforced thermoplastic molding materials which have very good tensile strength and at the same time flowability.
It is a further object of the present invention to provide thermoplastic molding materials which have great rigidity and toughness.
It is a further o
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J. Poly. Sci, vol. 26, 2031-2037 (1988).
J. Poly. Sci. vol. 29, 1329-1338 (1991).
Engelhardt Ralf
Gottschalk Axel
Koch Jurgen
Weiss Robert
BASF - Aktiengesellschaft
Warzel Mark L.
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