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1. 发明授权

US4386153A Light-sensitive photopolymerizable composition 失效
标题翻译：光敏光聚合组合物
公开(公告)号：US4386153A
公开(公告)日：1983-05-31
申请号：US240433
申请日：1981-03-04
申请人： Fumiaki Shinozaki , Yasuo Washizawa , Tomoaki Ikeda , Sho Nakao , Syunichi Kondoh
发明人： Fumiaki Shinozaki , Yasuo Washizawa , Tomoaki Ikeda , Sho Nakao , Syunichi Kondoh
IPC分类号： C08F2/00 , C08F2/50 , G03F7/031 , H01L21/027 , G03C1/68
CPC分类号： G03F7/031 , Y10S430/12 , Y10S430/124
摘要： A light-sensitive composition comprising addition polymerizable ethylenically unsaturated double bond-containing compounds and a photopolymerization initiator comprising (1) at least one compound selected from the group consisting of benzanthrone, substituted benzanthrones (the substituents of which include halogen atoms, alkyl groups having 1 to 5 carbon atoms and alkoxy groups having 1 to 5 carbon atoms), 1,2-benzanthraquinone and substituted benzanthraquinones (substituents of which include halogen atoms, alkyl groups having 1 to 5 carbon atoms and alkoxy groups having 1 to 5 carbon atoms) and (2) at least one compound selected from the group consisting of 4,4'-di-substituted amino-benzophenones represented by the following general formula (a), p-substituted amino-benzaldehyde derivatives represented by the following general formula (b), 2-(p-substituted amino-phenyl)-1,3-dioxolanes represented by the following general formula (c), 4,4'-bis(substituted amino)-N-benzylideneanilines represented by the following general formula (d) and 2-[4-(substituted amino)cinnamoyl]naphthalenes represented by the following general formula (e): ##STR1## wherein R and R', which may be the same or different, each represents a methyl group or an ethyl group, and R.sup.0 represents a hydrogen atom, a hydroxy group, a --CR.sup.1 R.sup.2 R.sup.3 group, where R.sup.1, R.sup.2 and R.sup.3, which may be the same or different, each represents a hydrogen atom or an alkyl group having 1 to 3 carbon atoms, or an --OR.sup.4 group, where R.sup.4 represents an alkyl group having 1 to 5 carbon atoms.
摘要翻译：一种包含可加成聚合的烯属不饱和双键的化合物和光聚合引发剂的感光性组合物，其包含（1）选自由以下的化合物组成的组中的至少一种化合物：苯并蒽酮，取代的苯并蒽酮（其取代基包括卤素原子，至5个碳原子和具有1至5个碳原子的烷氧基），1,2-苯并蒽醌和取代的苯并蒽醌（其取代基包括卤素原子，具有1至5个碳原子的烷基和具有1至5个碳原子的烷氧基）和（2）选自由以下通式（a）表示的4,4'-二取代氨基 - 二苯甲酮，由以下通式（b）表示的对取代氨基 - 苯甲醛衍生物，，由以下通式（c）表示的2-（对取代氨基 - 苯基）-1,3-二氧戊环，4,4'-双（取代氨基）-N-亚苄基苯胺r （d）和由下列通式（e）表示的2- [4-（取代氨基）肉桂酰基]萘表示：（a）图像（c）（c）（e）其中R和R'可以相同或不同，表示甲基或乙基，R 0表示氢原子，羟基，-CR 1 R 2 R 3 基团，其中可以相同或不同的R 1，R 2和R 3各自表示氢原子或具有1至3个碳原子的烷基或-OR 4基团，其中R 4表示具有1至5个碳原子的烷基原子

2. 发明授权

US4439515A Light-sensitive ethylenically unsaturated materials containing benzanthrones and novel sensitizers 失效
标题翻译：含有苯并蒽和新型敏化剂的光敏烯属不饱和物质
公开(公告)号：US4439515A
公开(公告)日：1984-03-27
申请号：US484818
申请日：1983-04-14
申请人： Fumiaki Shinozaki , Yasuo Washizawa , Tomoaki Ikeda , Sho Nakao , Syunichi Kondoh
发明人： Fumiaki Shinozaki , Yasuo Washizawa , Tomoaki Ikeda , Sho Nakao , Syunichi Kondoh
IPC分类号： C08F2/00 , C08F2/50 , G03F7/031 , H01L21/027 , G03C1/68
CPC分类号： G03F7/031 , Y10S430/12 , Y10S430/124
摘要： A light-sensitive composition comprising addition polymerizable ethylenically unsaturated double bond-containing compounds and a photopolymerization initiator comprising (1) at least one compound selected from the group consisting of benzanthrone, substituted benzanthrones (the substituents of which include halogen atoms, alkyl groups having 1 to 5 carbon atoms and alkoxy groups having 1 to 5 carbon atoms), 1,2-benzanthraquinone and substituted benzanthraquinones (substituents of which include halogen atoms, alkyl groups having 1 to 5 carbon atoms and alkoxy groups having 1 to 5 carbon atoms) and (2) at least one compound selected from the group consisting of 4,4'-di-substituted amino-benzophenones represented by the following general formula (a), p-substituted amino-benzaldehyde derivatives represented by the following general formula (b), 2-(p-substituted amino-phenyl)-1,3-dioxolanes represented by the following general formula (c), 4,4'-bis(substituted amino)-N-benzylideneanilines represented by the following general formula (d) and 2-[4-(substituted amino)cinnamoyl]naphthalenes represented by the following general formula (e): ##STR1## wherein R and R', which may be the same or different, each represents a methyl group or an ethyl group, and R.sup.0 represents a hydrogen atom, a hydroxy group, a --CR.sup.1 R.sup.2 R.sup.3 group, where R.sup.1, R.sup.2 and R.sup.3, which may be the same or different, each represents a hydrogen atom or an alkyl group having 1 to 3 carbon atoms, or an --OR.sup.4 group, where R.sup.4 represents an alkyl group having 1 to 5 carbon atoms.
摘要翻译：一种包含可加成聚合的烯属不饱和双键的化合物和光聚合引发剂的感光性组合物，其包含（1）选自由以下的化合物组成的组中的至少一种化合物：苯并蒽酮，取代的苯并蒽酮（其取代基包括卤素原子，至5个碳原子和具有1至5个碳原子的烷氧基），1,2-苯并蒽醌和取代的苯并蒽醌（其取代基包括卤素原子，具有1至5个碳原子的烷基和具有1至5个碳原子的烷氧基）和（2）选自由以下通式（a）表示的4,4'-二取代氨基 - 二苯甲酮，由以下通式（b）表示的对取代氨基 - 苯甲醛衍生物，，由以下通式（c）表示的2-（对取代氨基 - 苯基）-1,3-二氧戊环，4,4'-双（取代氨基）-N-亚苄基苯胺r （d）和由下列通式（e）表示的2- [4-（取代氨基）肉桂酰基]萘表示：（a）图像（c）（c）（e）其中R和R'可以相同或不同，表示甲基或乙基，R 0表示氢原子，羟基，-CR 1 R 2 R 3 基团，其中可以相同或不同的R 1，R 2和R 3各自表示氢原子或具有1至3个碳原子的烷基或-OR 4基团，其中R 4表示具有1至5个碳原子的烷基原子

3. 发明授权

US4298679A Light-sensitive composition 失效
标题翻译：感光组合物
公开(公告)号：US4298679A
公开(公告)日：1981-11-03
申请号：US57149
申请日：1979-07-12
申请人： Fumiaki Shinozaki , Yasuo Washigawa , Tomoaki Ikeda , Sho Nakao , Syunichi Kondoh
发明人： Fumiaki Shinozaki , Yasuo Washigawa , Tomoaki Ikeda , Sho Nakao , Syunichi Kondoh
IPC分类号： C08F2/00 , C08F2/50 , G03F7/031 , H01L21/027 , G03C1/68
CPC分类号： G03F7/031 , Y10S430/12 , Y10S430/124
摘要： A light-sensitive composition comprising addition polymerizable ethylenically unsaturated double bond-containing compounds and a photopolymerization initiator comprising (1) at least one compound selected from the group consisting of benzanthrone, substituted benzanthrones (the substituents of which include halogen atoms, alkyl groups having 1 to 5 carbon atoms and alkoxy groups having 1 to 5 carbon atoms), 1,2-benzanthraquinone and substituted benzanthraquinones (substituents of which include halogen atoms, alkyl groups having 1 to 5 carbon atoms and alkoxy groups having 1 to 5 carbon atoms) and (2) at least one compound selected from the group consisting of 4,4'-di-substituted amino-benzophenones represented by the following general formula (a), p-substituted amino-benzaldehyde derivatives represented by the following general formula (b), 2-(p-substituted amino-phenyl)-1,3-dioxolanes represented by the following general formula (c), 4,4'-bis(substituted amino)-N-benzylideneanilines represented by the following general formula (d) and 2-[4-(substituted amino)cinnamoyl]naphthalenes represented by the following general formula (e): ##STR1## wherein R and R', which may be the same or different, each represents a methyl group or an ethyl group, and R.sup.0 represents a hydrogen atom, a hydroxy group, a --CR.sup.1 R.sup.2 R.sup.3 group, where R.sup.1, R.sup.2 and R.sup.3, which may be the same or different, each represents a hydrogen atom or an alkyl group having 1 to 3 carbon atoms, or an --OR.sup.4 group, where R.sup.4 represents an alkyl group having 1 to 5 carbon atoms.
摘要翻译：一种包含可加成聚合的烯属不饱和双键的化合物和光聚合引发剂的感光性组合物，其包含（1）选自由以下的化合物组成的组中的至少一种化合物：苯并蒽酮，取代的苯并蒽酮（其取代基包括卤素原子，至5个碳原子和具有1至5个碳原子的烷氧基），1,2-苯并蒽醌和取代的苯并蒽醌（其取代基包括卤素原子，具有1至5个碳原子的烷基和具有1至5个碳原子的烷氧基）和（2）选自由以下通式（a）表示的4,4'-二取代氨基 - 二苯甲酮，由以下通式（b）表示的对取代氨基 - 苯甲醛衍生物，，由以下通式（c）表示的2-（对取代氨基 - 苯基）-1,3-二氧戊环，4,4'-双（取代氨基）-N-亚苄基苯胺r （d）和由下列通式（e）表示的2- [4-（取代氨基）肉桂酰基]萘表示：（a）图像（c）（c）（e）其中R和R'可以相同或不同，表示甲基或乙基，R 0表示氢原子，羟基，-CR 1 R 2 R 3 基团，其中可以相同或不同的R 1，R 2和R 3各自表示氢原子或具有1至3个碳原子的烷基或-OR 4基团，其中R 4表示具有1至5个碳原子的烷基原子

4. 发明授权

US4175971A Light-sensitive photopolymerizable composition 失效
标题翻译：光敏光聚合组合物
公开(公告)号：US4175971A
公开(公告)日：1979-11-27
申请号：US832864
申请日：1977-09-13
申请人： Fumiaki Shinozaki , Yasuo Washigawa , Tomoaki Ikeda , Sho Nakao , Syunichi Kondoh
发明人： Fumiaki Shinozaki , Yasuo Washigawa , Tomoaki Ikeda , Sho Nakao , Syunichi Kondoh
IPC分类号： C08F2/00 , C08F2/50 , G03F7/031 , H01L21/027 , G03C1/68 , C08F2/46
CPC分类号： G03F7/031 , Y10S430/12 , Y10S430/124
摘要： A light-sensitive composition comprising addition polymerizable ethylenically unsaturated double bond-containing compounds and a photopolymerization initiator comprising (1) at least one compound selected from the group consisting of benzanthrone, substituted benzanthrones (the substituents of which include halogen atoms, alkyl groups having 1 to 5 carbon atoms and alkoxy groups having 1 to 5 carbon atoms), 1,2-benzanthraquinone and substituted benzanthraquinones (substituents of which include halogen atoms, alkyl groups having 1 to 5 carbon atoms and alkoxy groups having 1 to 5 carbon atoms) and (2) at least one compound selected from the group consisting of 4,4'-di-substituted amino-benzophenones represented by the following general formula (a), p-substituted amino-benzaldehyde derivatives represented by the following general formula (b), 2-(p-substituted amino-phenyl)-1,3-dioxolanes represented by the following general formula (c), 4,4'-bis(substituted amino)-N-benzylideneanilines represented by the following general formula (d) and 2-[4-(substituted amino)cinnamoyl]naphthalenes represented by the following general formula (e): ##STR1## where R and R', which may be the same or different, each represents a methyl group or an ethyl group, and R.sup.0 represents a hydrogen atom, a hydroxy group, a --CR.sup.1 R.sup.2 R.sup.3 group, where R.sup.1, R.sup.2 and R.sup.3, which may be the same or different, each represents a hydrogen atom or an alkyl group having 1 to 3 carbon atoms, or an --OR.sup.4 group, where R.sup.4 represents an alkyl group having 1 to 5 carbon atoms.
摘要翻译：一种包含可加成聚合的烯属不饱和双键的化合物和光聚合引发剂的感光性组合物，其包含（1）选自由以下的化合物组成的组中的至少一种化合物：苯并蒽酮，取代的苯并蒽酮（其取代基包括卤素原子，至5个碳原子和具有1至5个碳原子的烷氧基），1,2-苯并蒽醌和取代的苯并蒽醌（其取代基包括卤素原子，具有1至5个碳原子的烷基和具有1至5个碳原子的烷氧基）和（2）选自由以下通式（a）表示的4,4'-二取代氨基 - 二苯甲酮，由以下通式（b）表示的对取代氨基 - 苯甲醛衍生物，，由以下通式（c）表示的2-（对取代氨基 - 苯基）-1,3-二氧戊环，4,4'-双（取代氨基）-N-亚苄基苯胺r （d）和由下列通式（e）表示的2- [4-（取代氨基）肉桂酰基]萘表示：（a）图像（c）（c）（e）其中R和R'可相同或不同，表示甲基或乙基，R 0表示氢原子，羟基，-CR 1 R 2 R 3 基团，其中可以相同或不同的R 1，R 2和R 3各自表示氢原子或具有1至3个碳原子的烷基或-OR 4基团，其中R 4表示具有1至5个碳原子的烷基原子

5. 发明授权

US4290870A Photopolymerizable compositions 失效
标题翻译：光聚合组合物
公开(公告)号：US4290870A
公开(公告)日：1981-09-22
申请号：US40370
申请日：1979-05-18
申请人： Syunichi Kondoh , Akihiro Matsufuji , Akira Umehara
发明人： Syunichi Kondoh , Akihiro Matsufuji , Akira Umehara
IPC分类号： C08F2/00 , C08F2/50 , C08F2/54 , C09D4/00 , C09D11/00 , C09D11/10 , C09J4/00 , G03F7/031 , G03C1/68 , G03C1/70
CPC分类号： C08F2/50 , G03F7/031
摘要： A photopolymerizable composition comprising (1) an addition-polymerizable compound having at least one ethylenically unsaturated double bond and (2) a photopolymerization initiator as essential components, the improvement which comprises the photopolymerization initiator comprising a combination of (a) a 5-isoxazolone represented by the general formula (1) and (b) an aromatic carbonyl compound, a dialkylamino aromatic carbonyl compound represented by any of formulae (2) to (5), a compound represented by the formula (6) or 2-(.alpha.-thioxophenetylidene)-3-methylnaphtho[1,2-d][1,3]-thiazoline: ##STR1## wherein in the formula (1), A.sup.1 and A.sup.2 each represent an alkyl group, an alkylcarbonyl group, an alkoxycarbonyl group, an aryl group, an arylcarbonyl group or a hydrogen atom and may be the same or different; in the formulae (2) to (5) R.sup.1 and R.sup.2 each represent an alkyl group and may be the same or different, R.sup.3 represents an alkyl group, an aryl group, an aralkyl group, an alkoxy group, an aryloxy group or a 5- or 6-membered hetero-aromatic ring, and X represents a substituent having a Hammett's .sigma. value in the range of about -0.9 to +0.7; and in the formula (6) R.sup.4 represents an alkyl group, or an alkenyl group, R.sup.5 represents an alkyl group, an aryl group, a thienyl group or a furyl group, and Z represents an atomic group necessaary to form a nitrogen-containing heterocyclic ring; is disclosed.
摘要翻译：一种可光聚合组合物，其包含（1）具有至少一个烯属不饱和双键的加成聚合性化合物和（2）光聚合引发剂作为必要成分，其改进包括光聚合引发剂，其包含（a）代表的（a）5-异恶唑酮由通式（1）和（b）表示的芳族羰基化合物，由式（2）至（5）中任一个表示的二烷基氨基芳族羰基化合物，由式（6）表示的化合物或2-（α-硫代亚乙烯基）-3甲基萘并[1,2-d] [1,3]噻唑啉：（1）（2）（3）（4）（6）其中式（1）中，A1和A2各自表示烷基，烷基羰基，烷氧基羰基，芳基，芳基羰基或氢原子，可以相同或不同; 在式（2）至（5）中，R 1和R 2各自表示烷基，可以相同或不同，R 3表示烷基，芳基，芳烷基，烷氧基，芳氧基或5 - 或6元杂 - 芳环，X表示哈米特σ值在约-0.9至+0.7范围内的取代基; 在式（6）中，R 4表示烷基或烯基，R 5表示烷基，芳基，噻吩基或呋喃基，Z表示需要形成含氮杂环的原子团环; 被披露。

6. 发明授权

US4148658A Photopolymerizable composition comprising multi-photoinitiator system 失效
标题翻译：包含多光引发剂体系的光聚合组合物
公开(公告)号：US4148658A
公开(公告)日：1979-04-10
申请号：US855638
申请日：1977-11-29
申请人： Syunichi Kondoh , Akihiro Matsufuji , Akira Umehara , Akira Sato , Akira Ogawa
发明人： Syunichi Kondoh , Akihiro Matsufuji , Akira Umehara , Akira Sato , Akira Ogawa
IPC分类号： C08F2/00 , C08F2/50 , G03F7/004 , G03F7/031 , G03C1/68 , G03C5/00
CPC分类号： C08F2/50 , G03F7/031 , Y10S430/146
摘要： A photopolymerizable composition comprising, as essential components, (A) at least one compound having one or more addition polymerizable ethylenically unsaturated double bonds and (B) a photopolymerization initiator composition comprising (i) a combination of at least one compound (a) and at least one compound (b), (ii) a combination of at least one compound (a) and at least one compound (c) or (iii) a combination of at least one compound (a), at least one compound (b) and at least one compound (c);Wherein compound (a) is a benzoylmethylenebenzothiazolylidenethiazolidone compound selected from the group consisting of 2-benzoylmethylene-5-benzothiazolylidenethiazolidin-4-one and the substituted derivatives thereof represented by the following general formula (I): ##STR1## wherein R.sup.1, R.sup.2 and X are as defined in the specification; COMPOUND (B) IS A TERTIARY OR POLYAMINE COMPOUND SELECTED FROM THE GROUP CONSISTING OF TERTIARY AMINES REPRESENTED BY THE FOLLOWING GENERAL FORMULA (II): ##STR2## wherein R.sup.3, R.sup.4 and R.sup.5 are as defined in the specification; andCompound (c) is a disubstituted aminoarylcarbonyl compound selected from a defined group.
摘要翻译：一种可光聚合组合物，其包含作为必要组分的（A）至少一种具有一个或多个可加成聚烯键式不饱和双键的化合物和（B）光聚合引发剂组合物，其包含（i）至少一种化合物（a）和至少一种化合物（b），（ii）至少一种化合物（a）和至少一种化合物（c）的组合或（iii）至少一种化合物（a），至少一种化合物（b）和至少一种化合物（c）; 其中化合物（A）为由下列通用化合物（I）表示的由2-苯甲酰基乙烯基-5-苯并噻唑并二恶唑啉-4-酮及其取代衍生物所组成的组所选择的苯甲酰基苯乙烯苯并噻唑并二恶唑烷酮化合物：其中R1， R2和X如说明书中所定义; 化合物（B）是由下列通用化合物（II）表示的由仲胺组成的组选择的仲胺或多胺化合物：其中R3，R4和R5如说明书中所定义; 和化合物（C）是从定义的基团中选择的分解的氨基甲苯基化合物。

7. 发明授权

US4259432A Photopolymerizable compositions having combined photoinitiators 失效
标题翻译：具有组合光引发剂的光聚合组合物
公开(公告)号：US4259432A
公开(公告)日：1981-03-31
申请号：US82361
申请日：1979-10-05
申请人： Syunichi Kondoh , Akihiro Matsufuji , Yuji Ohara , Akira Umehara
发明人： Syunichi Kondoh , Akihiro Matsufuji , Yuji Ohara , Akira Umehara
IPC分类号： C08F2/00 , C08F2/50 , C08F2/54 , G03F7/031 , G03F7/038 , G03C1/68
CPC分类号： G03F7/031 , Y10S430/106 , Y10S430/117
摘要： In a photopolymerizable composition comprising (1) an addition-polymerizable compound having at least one ethylenically unsaturated double bond and (2) a photopolymerization initiator as essential components, the improvement which comprises that said photopolymerization initiator is a combination of (a) p-dialkylamino aromatic carbonyl compounds represented by the general formulae (1) to (4), (b) 5-isoxazolones represented by the general formula (5) and (c) 2,4,6-substituted-1,3,5-triazines represented by the general formula (6): ##STR1## where R.sup.1, R.sup.2 and R.sup.3 each represents an alkyl group or a substituted alkyl group, which may be the same or different from one another, X represents a substituent having a Hammett's .sigma. value in the range from -0.9 to 0.7, m represents 1 or 2, A.sup.1 and A.sup.2 each represents an alkyl group, a substituted alkyl group, an alkylcarbonyl group, an alkoxycarbonyl group, an aryl group, a substituted aryl group, an arylcarbonyl group or a hydrogen atom, which may be the same or different from each other, and R.sup.4, R.sup.5 and R.sup.6 each represents an alkyl group, a substituted alkyl group, an aryl group, a substituted aryl group or an aralkyl group, which may be the same or different from each other, but at least one of them represents a mono-, di- or trihalomethyl group.
摘要翻译：在包含（1）具有至少一个烯属不饱和双键的加成聚合性化合物和（2）光聚合引发剂作为必要成分的光聚合性组合物中，包括所述光聚合引发剂是（a）对二烷基氨基由通式（1）至（4）表示的芳族羰基化合物，（b）由通式（5）和（c）表示的5-异恶唑酮，表示为2,4,6-取代的1,3,5-三嗪（6）其中R1，R2和R3（6）表示：（1）各自表示烷基或取代的烷基，其可以相同或不同，X表示哈米特σ值在-0.9至0.7范围内的取代基，m表示1或2，各自为A1和A2 表示烷基，取代的烷基，烷基羰基，烷氧基羰基，芳基，取代的a Ryl基，芳基羰基或氢原子，可以相同或不同，R4，R5和R6各自表示烷基，取代的烷基，芳基，取代的芳基或芳烷基基团可以相同或不同，但其中至少一个表示一，二或三卤代甲基。

8. 发明授权

US4264710A Photopolymerizable compositions containing inhibitor compounds having thioureylene groups 失效
公开(公告)号：US4264710A
公开(公告)日：1981-04-28
申请号：US136642
申请日：1980-04-02
申请人： Syunichi Kondoh , Takeshi Takayama , Akira Umehara , Tadao Shishido , Isamu Itoh
发明人： Syunichi Kondoh , Takeshi Takayama , Akira Umehara , Tadao Shishido , Isamu Itoh
IPC分类号： C08F2/00 , C08F2/50 , G03C1/00 , G03F7/004 , G03F7/027 , G03C1/68
CPC分类号： G03F7/027 , Y10S430/118
摘要： A photopolymerizable composition is described comprising (1) an addition-polymerizable compound having at least one ethylenically unsaturated double bond, (2) a photopolymerization initiator, and (3) a post-exposure polymerization inhibitor compound including a thioureylene group, such as a compound selected from the group consisting of thiourea and thiourea derivatives represented by the general formula (I), thiosemicarbazide and thiosemicarbazide derivatives represented by the general formula (II), and thiosemicarbazone derivatives represented by the general formula (III): ##STR1## wherein: R.sup.1 and R.sup.2, which may be the same or different each represents a hydrogen atom, an alkyl group having from 1 to 6 carbon atoms, a substituted alkyl group having from 1 to 6 carbon atoms, a phenyl group, a naphthyl group, a substituted phenyl group or a monovalent group derived from an O-, S- or N-containing 5- or 6-member heterocyclic nucleus,R.sup.3 represents a hydrogen atom, an alkyl group having from 1 to 6 carbon atoms, a substituted alkyl group having from 1 to 6 carbon atoms, a phenyl group, a naphgroup or a substituted phenyl group,R.sup.4 represents a hydrogen atom or an alkyl group having from 1 to 6 carbon atoms,R.sup.5 represents a hydrogen atom, an alkyl group having from 1 to 6 carbon atoms, a phenyl group, a naphthyl group, a monovalent group derived from an 0-, N- or S-containing 5- or 6-member heterocyclic nucleus, an alkylcarbonyl group having from 2 to 7 carbon atoms or a benzoyl group,R.sup.6 represents a hydrogen atom, an alkyl group having from 1 to 6 carbon atoms, a phenyl group or a naphthyl group,R.sup.7 represents a hydrogen atom or an alkyl group having from 1 to 6 carbon atoms, andR.sup.8 represents an alkyl group having from 1 to 6 carbon atoms, a phenyl group, a naphthyl group or a substituted phenyl group.

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