摘要:
High molecular weight polyaryletherketones are prepared by nucleophilic polycondensation of a bisphenol with a mixture of a difluoroaromatic and a dichloroaromatic by a process in which, in a first stage, the total amount of bisphenol and dichloroaromatic is added and, in a second stage, the difluoroaromatic is added. The resulting polyaryletherketones have a reduced viscosity of not less than 0.65 and contain from 0.003 to 0.03% by weight of organically bonded chlorine and from 0.003 to 0.03% by weight of organically bonded fluorine.
摘要:
Polyaryl ether ketones essentially consist of(A) 55-95 mol % of repeating units of the general formula ##STR1## where s and t are each 0, 1, 2 or 3 and Q and T are each --O-- or --CO--, or their C.sub.1 -C.sub.6 -alkyl, C.sub.1 -C.sub.6 alkoxy, aryl, chlorine or fluorine derivatives substituted in the nucleus, and(B) 5-45 mol % of repeating units of the general formula II ##STR2## where Ar.sup.1, Ar.sup.2, Ar.sup.3, ar.sup.4 and Ar.sup.5 independently of one another are each a phenylene, biphenylene or naphthylene group or a C.sub.1 -C.sub.6 -alkyl, C.sub.1 -C.sub.6 -alkoxy, aryl, chlorine or fluorine derivative of this group, Q' and T' are each --O--or --CO-- and s' and t' are each 0, 1, 2 or 3, with the proviso that one or more of the groups Ar.sup.1, Ar.sup.2, Ar.sup.3, Ar.sup.4 and Ar.sup.5 are a biphenylene or naphthylene group or a C.sub.1 -C.sub.6 -alkyl, C.sub.1 -C.sub.6 -alkoxy, aryl, chlorine or fluorine derivative of such a group and, if Ar.sup.1 is a biphenylene group, all parameters s, t, s' and t' are not simultaneously 0.
摘要:
Polyaryl ethers which are stable at high temperatures essentially consist of(A) from 60 to 97 mol % of repeating units of the general formula I ##STR1## where l and m are each 1 or 2, or their C.sub.1 -C.sub.6 -alkyl, C.sub.1 -C.sub.6 -alkoxy, aryl, chlorine or fluorine derivatives which are substituted in the nucleus,(B) from 3 to 40 mol % of repeating units of the general formula II ##STR2## where n is 1 or 2, or their C.sub.1 -C.sub.6 -alkyl, C.sub.1 -C.sub.6 -alkoxy, aryl, chlorine or fluorine derivatives which are substituted in the nucleus, and furthermore(C) from 0 to 15 mol % of repeating units of the general formulae III and/or IV ##STR3## where Ar is ##STR4## or a C.sub.1 -C.sub.6 -alkyl, C.sub.1 -C.sub.6 -alkoxy, chlorine or fluorine derivative thereof, r is 0 or 1 and p, q and s are each 1 or 2, or their C.sub.1 -C.sub.6 -alkyl, C.sub.1 -C.sub.6 -alkoxy, aryl, chlorine or fluorine derivatives which are substituted in the nucleus.
摘要:
Polyaryleneetherketones are prepared by a quasicontinuous process, by Friedel-Crafts polycondensation of a reaction mixture containingA. a monomer system of(a)(1) an aromatic dicarboxylic acid chloride or phosgene and(2) a polynuclear aromatic having two exchangeable hydrogen atoms and/or(b) a polynuclear aromatic carboxylic acid chloride having one exchangeable hydrogen atom,B. a Lewis acid,C. if necessary, a Lewis base andD. an inert solvent.The reaction mixture is subjected to polycondensation in a first zone, with stirring, to a viscosity of not more than 2,000 mPa.s, then conveyed through a second, vertical, unstirred zone with plug flow by means of gas pressure, where the polycondensation is completed, and is finally discharged continuously.
摘要:
Fiber reinforced thermoplastic integral skin foams of density 50-500 kg/m.sup.3 have an outer skin 0.05 to 1.5 mm in thickness and contain from 2 to 60% by weight of reinforcing fibers.
摘要翻译:密度为50-500kg / m 3的纤维增强热塑性整体皮肤泡沫具有厚度为0.05至1.5mm的外皮,并含有2至60重量%的增强纤维。
摘要:
Copolycondensate molding materials are obtainable by polycondensation offrom 2 to 98 mol % of 2,2-di-(4'-hydroxyphenyl)-propane (A),from 2 to 98 mol % of 4,4'-dihydroxydiphenyl sulfone (B) andfrom 0 to 96 mol % of (C) ##STR1## where R.sup.1 and R.sup.2 are each H, C.sub.1 -C.sub.6 -alkyl or C.sub.1 -C.sub.6 -alkoxy, X is a chemical bond, --S--, --O--, --CO--, CR.sup.3 R.sup.4 (where R.sup.3 and R.sup.4 are different when n and p are each 0), or SO.sub.2 -- only when n or p is 0), R.sup.3 and R.sup.4 are each H, C.sub.1 -C.sub.6 -alkyl, C.sub.1 -C.sub.6 -alkoxy, aryl or halogen-substituted alkyl of 1 to 4 carbon atoms, m is 0 or 1, and n and p are each 0, 1, 2, 3, or 4,with from 1 to 100 mol % of (D) ##STR2## where R.sup.5 and R.sup.6 have the same meaning as R.sup.1 and R.sup.2, and v and w are each 0, 1, 2, 3 or 4, and from 0 to 99 mol % of (E) ##STR3## where R.sup.7 -R.sup.10 are each Cl or F or have the same meanings as R.sup.1 and R.sup.2, q is 0 or 1, r, s, t and n are each 0, 1, 2, 3 or 4, Z.sub.1 is --SO.sub.2 -- or --CO-- and Z.sub.2 is --O--, --S--, --SO.sub.2 --, --CO-- or a chemical bond,with the proviso that one or more of the components C and E are present and the molar ratio of B to the sum of A and C is not greater than 1.
摘要:
Highly heat-resistant polyaryl ether ketones are composed of(A) from 50 to 100 mol % of repeat units of the general formula I ##STR1## or a ring-substituted C.sub.1 -C.sub.8 -alkyl, C.sub.1 -C.sub.8 -alkoxy, aryl, chlorine or fluorine derivative thereof and(B) from 0 to 50 mol % of repeat units, different from I, of the general formulae II and/or III ##STR2## or a ring-substituted C.sub.1 -C.sub.8 -alkyl, C.sub.1 -C.sub.8 -alkoxy, aryl, chlorine or fluorine derivative thereof, where Q, Q', Y, Y', T, T', Z and Z' are each --O--, --CO-- or a chemical bond, one or more of these substituents is a --CO-- group, and s, t and u are each 0 or 1.
摘要:
Polyaryl ether ketones are prepared by reacting aromatic dihydroxy compounds with aromatic dihalogen compounds in polar aprotic solvents in the presence of alkali metal carbonates, in particular by reacting aromatic dihydroxy compounds I ##STR1## or ring-substituted C.sub.1 -C.sub.8 -alkyl, C.sub.1 -C.sub.8 -alkoxy, aryl, chlorine or fluorine derivatives thereof, n and m each being 0 or 1, with aromatic dihalogen compounds ##STR2## or ring-substituted C.sub.1 -C.sub.8 -alkyl, C.sub.1 -C.sub.8 -alkoxy, aryl, chlorine or fluorine derivatives thereof, r and s each being 0 or 1, A being oxygen or a chemical bond and X being chlorine or fluorine.
摘要:
Fiber-reinforced materials are produced by a process in which a heat-stable thermoplastic aromatic polyether A containing reactive groups, preferably nitrile groups and/or sulfur bridges and/or arylthio or alkylthio groups, if required together with a heat-stable thermoplastic polymer B which does not contain any reactive groups, is applied onto reinforcing fibers, the resulting semi-finished product is shaped, and the plastic matrix in the molding obtained is crosslinked so that there is virturally no increase in its glass transition temperature although the amount of soluble material is decreased to less than 60%, determined by extraction in boiling dichloromethane for one hour.
摘要:
In the preparation of block copolyethers which contain sulfonyl and keto groups by polycondensation of aromatic dihalogen compounds and bisphenols in the presence of an alkali metal carbonate in N-methylpyrrolidin-2-one as a solvent, an amorphous polyether sulfone block having a molecular weight Mn of from 1,500 to 30,000 is prepared in a first stage, and, in a second stage, a polyetherketone block is polymerized onto the living chain ends, the molar ratio of sulfonyl to keto groups being from 90:10 to 40:60.