Abstract:
PROBLEM TO BE SOLVED: To provide a transparent impact resistant improved polystyrene with favorable balance in the ratios of toughness and stiffness without conventional drawbacks. SOLUTION: The block copolymer is produced from an aromatic vinyl monomer and contains at least two hard blocks S 1 and S 2 . The block copolymer contains at least one random soft block B/S produced from the aromatic vinyl monomer and a diene between the hard blocks S 1 and S 2 , and contains less than 20% of 1,2-vinyl in the soft block B/S and has the hard block ratios at 51-74 mass% in the total block copolymers without containing a single polymer block B composed of the diene. COPYRIGHT: (C)2004,JPO&NCIPI
Abstract:
Mouldings made of thermoplastic moulding masses contain (A) 30 to 99 wt %, relative to the total weight of the moulding mass, of a thermoplastic polymer, comprising, relative to (A): (a1) 50 to 100 wt % of a styrene compound of general formula (I), in which R?1 and R2¿ stand for hydrogen or C¿1?-C8 alkyl, or a (C1-C8-alkyl)ester of acrylic or methacrylic acid, or mixtures of the styrene compound and of the (C1-C8-alkyl)ester of acrylic or methacrylic acid; (a2) 0 to 40 wt % acryl nitrile or methacryl nitrile or their mixtures; and (a3) 0 to 40 wt % of one or several other monoethylenically unsaturated monomers different from (a2); (b) 1 to 70 wt %, with respect to the total weight of the moulding mass, of a graft polymer comprising, relative to (B): (b1) 30 to 90 wt % of a rubber-elastic grafted core made of a polymer with a glass transition temperature below 0 °C and obtained by copolymerising (b11) 50 to 99.99 wt %, with respect to (b1), of a (C1-C10-alkyl)ester of acrylic acid; (b12) 0.01 to 10 wt % of a polyfunctional, cross-linking monomer; and (b13) 0 to 40 wt % of one or several others monoethylenically unsaturated monomers different from (b11); and (b2) 10 to 70 wt % of a grafted sheath which contains, relative to (b2): (b21) 50 to 100 wt % of a styrene compound of general formula (I), in which R?1 and R2¿ stand for hydrogen or C¿1?-C8-alkyl; or a (C1-C8-alkyl)ester of acrylic acid or methacrylic acid; or mixtures of the styrene compound and of the (C1-C8-alkyl)ester of acrylic or methacrylic acid; (b22) 0 to 40 wt % acryl nitrile or methacryl nitrile or their mixtures; and (b23) 0 to 40 wt % of one or several other monoethylenically unsaturated monomers.
Abstract:
The invention relates to a method for producing a compound (II) or a composition containing the compound (II), a composition containing succinimide, and a composition which is produced according to said inventive method.
Abstract:
A continuous anionic polymerisation or copolymerisation process of styrene or diene monomers with alkali metal alkyl as polymerisation initiator is carried out in the presence of a metal alkyl or aryl of an at least bivalent element as reaction speed regulator, preferably in non-isotherm conditions and without a back admixture in a pipe or pipe bundle reactor. A metal alkyl or aryl A of formula R M and a metal alkyl or aryl B of formula R nM in a molar ratio between B and A from 0.1:1 to 500:1 are used. In the formulas, M is Li, Na or K; R is hydrogen, C1-C20-alkyl or C6-C20-aryl or C7-C20-alkyl-substituted aryl; M is an n-valent element of groups 2a, 2b or 3a of the periodic table of elements; and R is hydrogen, halogen, C1-C20-alkyl or C6-C20-alkyl. Also disclosed is a special initiator for the anionic polymerisation which does not contain any Lewis bases. 00000
Abstract:
The invention relates to thermoplastic moulding materials containing a mixture of (A) between 30 and 69 wt. %, in relation to the sum of the constituents (A), (B) and (C), of a methylmethacrylate polymer, (B) between 30 and 69 wt. %, in relation to the sum of the constituents (A), (B) and (C), of a copolymer that can be obtained by the polymerisation of a vinylaromatic monomer and a vinylcyanide, and (C) between 1 and 40 wt. %, in relation to the sum of the constituents (A), (B) and (C), of a graft copolymer that can be obtained from (C1) between 60 and 90 wt. %, in relation to (C), of a core, (C2) between 5 and 20 wt. %, in relation to (C), of a first graft envelope consisting of a vinylaromatic monomer, an alkylmethacrylate and optionally a cross-linking monomer, and (C3) between 5 and 20 wt. %, in relation to (C), of a second graft envelope consisting of an alkyl(meth)acrylate polymer, on the proviso that the quantitative ratio of (C2) to (C3) is between 2:1 and 1:2. The invention is characterised in that the average particle size D50 of the core (C1) is between 50 and 250 nm, the average particle size D90 of the core (C1) is between 60 and 1000 nm, the average particle size D90 of the core (C1) being larger than the average particle size D50 of the core (C1), by a factor between 1.15 and 20, and the core (C1) can be obtained by the polymerisation of a monomer mixture comprising (C11) between 65 and 89 wt. %, in relation to (C1), of a 1,3-diene, (C12) between 10 and 34.9 wt. %, in relation to (C1), of a vinylaromatic monomer, and (C13) between 0.1 and 5 wt. %, in relation to (C1), of an agglomeration polymer. The invention also relates to a method for producing said moulding masses, to the use thereof, and to the moulded bodies obtained therefrom.
Abstract:
A process for preparing impact-modified styrene polymers (HIPS) omprises anionic polymerization of styrene in the presence of a rubber in one or more polymerization reactors in succession. The rubber is prepared in solution in an immediately upstream process. The heat of polymerization is utilized to remove the solvent for the rubber, this solvent having a boiling point lower than those of styrene and ethylbenzene, from at least one of the polymerization reactors via distillation with distillative cooling, and the solvent is reintroduced into the process of rubber preparation.
Abstract:
In a process for the preparation of block copolymers from vinylaromatic monomers and dienes, the monomers are polymerized in the presence of at least one alkali metal organyl or alkali metal alkoxide and at least one magnesium, aluminum or zinc organyl.
Abstract:
Disclosed are a process for the preparation of an initiator composition comprising an alkali metal organyl and an aluminum organyl and a process for the polymerization of anionically polymerizable monomers.
Abstract:
New oximsulfonate compounds of formulae (I) or (II), wherein m is 0 or 1; x is 1 or 2; R1 is, for example phenyl, which is unsubstituted or substituted or R1 is a heteroaryl radical that is unsubstituted or substituted, or, if m is 0, R1 additionally is C2-C6alkoxycarbonyl, phenoxycarbonyl or CN; R'1 is for example C2-C12alkylene, phenylene; R2 has for example one of the meanings of R1; n is 1 or 2; R3 is for example C1-C18alkyl, R'3 when x is 1, has one of the meanings given for R3, or R'3 in formula (IV) and when x is 2 in formula (I), is for example C2-C12 alkylene, phenylene; R4 and R5 are independently of each other for example hydrogen, halogen, C1-C6alkyl; R6 is for example hydrogen, phenyl; R7 and R8 are independently of each other for example hydrogen or C1-C12alkyl; R9 is for example C1-C12alkyl; A is S, O, NR6, or a group of formula (A1), (A2), (A3) or (A4); R10 and R11 independently of each other have one of the meanings given for R4; R12, R13, R14 and R15 independently of one another are for example hydrogen, C1-C4alkyl; Z is CR11 or N; Z1 is -CH2-, S, O or NR6, are useful as latent sulfonic acids, especially in photoresist applications.
Abstract:
A process for the continuous anionic polymerization or copolymerization of styrene or diene monomers using an alkali metal alkyl compound as polymerization initiator is carried out in the presence of an alkyl- or arylmetal compound of an element which occurs in at least divalent form as rate regulator, preferably under non-isothermal conditions and without back-mixing in a tubular or tube-bundle reactor, preferably using an alkyl- or arylmetal compound A of the formula R1M1 and an alkyl- or arylmetal compound B of the formula R2nM2 in a molar ratio between B and A of from 0.1:1 to 500:1, whereM1 is Li, Na or K;R1 is hydrogen, C1-C20-alkyl, C6-C20-aryl, or C7-C20-alkyl-substituted aryl;M2 is an n-valent element from group 2a, 2b or 3a of the Periodic Table; andR2 is hydrogen, halogen, C1-C20-alkyl or C6-C20-aryl; and a special anionic polymerization initiator containing no Lewis base.