摘要:
Compounds of the formula I, II, III and IIIa ##STR1## in which Ar.sup.1 is an unsubstituted or substituted aromatic radical and at least one of the radicals R.sup.1 and R.sup.2 is an alkenyl, cycloalkenyl or arylmethyl group, are effective photoinitiators for photopolymerization of unsaturated compounds. They are particularly suitable for photocuring of pigmented systems.
摘要:
A Process for the selective preparation acrylate- or methacrylate-homo- or acrylate- or methacrylate-co-oligomers with a weight average molecular weight (Mw) from 1000 to 20000, a polydispersity≦3 and a conversion of the monomers to polymers greater than or equal to 70%, or for the selective preparation of polyvinylacetate and its hydrolysis product polyvinylalcohol with a weight average molecular weight (Mw) from 1000 to 25000, a polydispersity≦3 and a conversion of the monomers to polymers greater than or equal to 70%, is characterized in that a mixture of the corresponding monomers is irradiated in the presence of a specific photoinitiator or photoinitiator mixture at a temperature from −20 to 70° C. in an inert solvent or inert solvent mixture, with light of a wavelength from 305 to 450 nm, wherein the contents of monomers in the reaction mixture is up to 70%.
摘要:
There is disclosed a process for the preparation of compounds of formula I[R Fe R.sup.2 ].sub.q.sup..sym. X.sup.q.crclbar. (I),wherein R is an anion of formula C.sub.5 H.sub.4 R.sup.1 or C.sub.9 H.sub.7, R.sup.1 is hydrogen, C.sub.1 -C.sub.6 -alkyl or halogen, R.sup.2 is a .pi.-arene, X is an anion of valency q and q is 1, 2 or 3, by reacting ferrocene or a ferrocene derivative (C.sub.5 H.sub.4 R.sup.3)Fe(C.sub.5 H.sub.4 R.sup.1) or (C.sub.9 H.sub.7).sub.2 Fe, in which R.sup.3 has one of the meanings of R.sup.1, with at least one mole of a .pi.-arene R.sup.2, followed by the optional replacement of the anion X.sup.q.crclbar. in a manner known per se, the reaction of the ferrocene or ferrocene derivative being carried out in the presence of(a) at least 1.2 mol of a mixture of Al trihalide and Zr(IV) or Hf(IV) tetrahalide, in the presence or absence of a metallic reducing agent, such that at least 0.2 mol of Zr(IV) or Hf(IV) tetrahalide and at least 0.1 mol of Al trihalide are present, or of(b) at least 1.0 mol of a Zr(IV) or Hf(IV) tetrahalide as sole Lewis acid in conjunction with at least 1.0 mol of a metallic reducing agent, the amounts being based in each case on 1 mol of ferrocene or a ferrocene derivative.The compounds of formula I containing non-nucleophilic anions can be used as photoinitiators for cationically polymerizable compounds.
摘要:
There is disclosed a process for the preparation of compounds of formula I[R Fe R.sup.2 ].sub.q.sup..sym. X.sup.q.crclbar. (I),wherein R is an anion of formula C.sub.5 H.sub.4 R.sup.1 or C.sub.9 H.sub.7, R.sup.1 is hydrogen, C.sub.1 -C.sub.6 -alkyl or halogen R.sup.2 is a .pi.-arene, X is an anion of valency q and q is 1, 2 or 3, by reacting ferrocene or a ferrocene derivative (C.sub.5 H.sub.4 R.sup.3)Fe(C.sub.5 H.sub.4 R.sup.1) or (C.sub.9 H.sub.7).sub.2 Fe, in which R.sup.3 has one of the meanings of R.sup.1, with at least one mole of a .pi.-arene R.sup.2, followed by the optional replacement of the anion X.sup.q.crclbar. in a manner known per se, the reaction of the ferrocene or ferrocene derivative being carried out in the presence ofa) at least 1.2 mol of a mixture of Al trihalide and Zr(IV) or Hf(IV) tetrahalide, in the presence or absence of a metallic reducing agent, such that at least 0.2 mol of Zr(IV) or Hf(IV) tetrahalide and at least 0.1 mol of Al trihalide are present, or ofb) at least 1.0 mol of a Zr(IV) or Hf(IV) tetrahalide as sole Lewis acid in conjunction with at least 1.0 mol of a metallic reducing agent, the amounts being based in each case on 1 mol of ferrocene or a ferrocene derivative.The compounds of formula I containing non-nucleophilic anions can be used as photoinitiators for cationically polymerisable compounds.
摘要翻译:公开了制备式I化合物[R Fe R2] q(+)Xq( - )(I)的方法,其中R是式C5H4R1或C9H7的阴离子,R1是氢,C1-C6烷基 或卤素R 2是π-芳烃,X是通过使二茂铁或二茂铁衍生物(C5H4R3)Fe(C5H4R1)或(C9H7)2Fe)反应的化合价q和q为1,2或3的阴离子,其中R3具有一个 R 1的含义与至少1摩尔的仲芳基R2,然后以本身已知的方式任选地取代阴离子Xq( - ),二茂铁或二茂铁衍生物的反应在 在存在或不存在金属还原剂的情况下,存在a)至少1.2mol的三卤化铝和Zr(IV)或Hf(IV)四卤化物的混合物,使得至少0.2mol的Zr(IV)或Hf (IV)和至少0.1摩尔的三卤化铝,或b)至少1.0摩尔的Zr(IV)或Hf(IV)四卤化物作为唯一的路易斯酸,以及至少1.0摩尔的金属还原 代理,金额 基于每种情况下1摩尔二茂铁或二茂铁衍生物。 含有非亲核阴离子的式I化合物可用作阳离子可聚合化合物的光引发剂。
摘要:
Titanocenes of the formula I ##STR1## in which R.sup.1 are cyclopentadienyl.sup..crclbar. groups and R.sup.2 and R.sup.3 are aromatic radicals which are substituted in both ortho-positions by fluorine and, in addition, are substituted by an acyloxy group are suitable as photoinitiators for the photopolymerization of ethylenically unsaturated compounds.
摘要:
Compounds of the formula I, II, III and IIIa ##STR1## in which Ar.sup.1 is an unsubstituted or substituted aromatic radical and at least one of the radicals R.sup.1 and R.sup.2 is an alkenyl, cycloalkenyl or arylmethyl group, are effective photoinitiators for photopolymerization of unsaturated compounds. They are particularly suitable for photocuring of pigmented systems.
摘要:
Compounds of the formula I, II, III and IIIa ##STR1## in which Ar.sup.1 is an unsubstituted or substituted aromatic radical and at least one of the radicals R.sup.1 and R.sup.2 is an alkenyl, cycloalkenyl or arylmethyl group, are effective photoinitiators for photopolymerization of unsaturated compounds. They are particularly suitable for photocuring of pigmented systems.
摘要:
Fluorine-free titanocene compounds of the formula I or II ##STR1## in which both R.sub.1 radicals are preferably, independently of one another, cyclopentadienyl.sup..crclbar., which is unsubstituted or substituted by alkyl,alkoxy or --Si(R.sub.2).sub.3, and both R.sub.2 radicals are, in particular, alkyl, ##STR2## Z is --NR.sub.10 --, --0-- or --S--, Y is Cl, Br, I, CN, SCN, --O--CO--CH.sub.3, --O--CO--phenyl or --O--SO.sub.2 --CH.sub.3,n is 1 or 2,m is 0 or 1, where the sum of n and m must be 2,R.sub.3, R.sub.4 and R.sub.5 are in particular, independently of one another, hydrogen, Cl, alkyl, cycloalkyl, adamantyl, phenyl, pyrryl or biphenylyl, where these radicals are unsubstituted or substituted by alkyl, Cl, alkylthio, --NR.sub.8 R.sub.9, phenyl, phenylthio or C.sub.1 -C.sub.10 alkoxy, or R.sub.3, R.sub.4 and R.sub.5 are alkenyl, alkoxy, cycloalkoxy, phenoxy, benzyloxy, tetrahydrofurfuryloxy, alkylthio, cycloalkylthio, benzylthio or phenylthio, where R.sub.3 and R.sub.4 are not simultaneously hydrogen, andif Q is a pyrimidyl radical, at least one radical R.sub.3 or R.sub.4 is alkoxy, cycloalkoxy, phenoxy, benzyloxy, tetrahydrofurfuryloxy or alkenyloxy, andif Z is --NR.sub.10 --, R.sub.3 and R.sub.4 are Cl Br or I, both radicals R.sub.6, independently of one another, are alkyl or alkenyl or both radicals R.sub.6 together with the nitrogen atom to which they are bonded, form a morpholino radical,R.sub.7 is alkyl, cycloalkyl or phenyl,R.sub.8 is phenyl or .alpha.-tertiary C.sub.4 -C.sub.6 alkyl,R.sub.9 is, in particular, hydrogen, alkyl, cycloalkyl, phenyl or a ##STR3## radical, where, in addition, the two R.sub.9 radicals in --N(R.sub.9).sub.2 are identical or different and, together with the nitrogen atom to which they are bonded, may form a 5- or 6-membered heterocyclic ring which, in addition to the nitrogen atom, may also contain further nitrogen, oxygen or sulfur atoms,R.sub.10 is as defined for R.sub.9 or additionally, in particular, is phenyl which is unsubstituted or substituted by Cl, C.sub.1 -C.sub.12 alkyl, C.sub.1 -C.sub.10 alkoxy, C.sub.1 -C.sub.8 alkylthio, phenylthio, morpholino or --N(C.sub.1 -C.sub.4 alkyl).sub.2,X is --O--, --S--, ##STR4## methylene or ethylene, and A is C.sub.1 -C.sub.12 alkylene or --X--A--X-- is a direct bond, are suitable as photoinitiators for photopolymerisation of compounds containing ethylenically unsaturated double bonds.
摘要:
Compounds of the formula I, II, III and IIIa ##STR1## in which Ar.sup.1 is an unsubstituted or substituted aromatic radical and at least one of the radicals R.sup.1 and R.sup.2 is an alkenyl, cycloalkenyl or arylmethyl group, are effective photoinitiators for photopolymerization of unsaturated compounds. They are particularly suitable for photocuring of pigmented systems.
摘要:
Disclosed are compositions from which radically initiated oligomers/polymers having a controlled molecular weight, low polydispersity and a vinyl or dienyl end group are prepared. Further subjects of the invention are a process for controlled radical polymerization, oligomers/polymers obtainable by said process and the use of specific addition fragmentation agents for the polymerization process. The addition fragmentation agents are new in part and these are also subject of the present invention. The addition fragmentation agents are of the formula (Ia), (Ib) or (Ic) where Y is a group which activates the double bond towards Michael addition.