申请人:E. I. Du Pont de Nemours and Company
                            
                            
                                公开号:US05459029A1
                            
                            
                                公开(公告)日:1995-10-17
                            
                            An improved imidazolium hardener is described. These novel hardners are specifically advantageous for hardening, or crosslinking, a hydrophilic colloid in a photographic element. The advance in the art is realized in A hardening agent chosen from the set consisting of: ##STR1## wherein: Y.sup.1 represents an alkyl of 6-24 carbons, aryl of 6-24 carbons, aralkyl of 7 to 25 carbons, the atoms chosen from C, N, O, and S necessary to form a 5- or 6-membered ring, or --L.sup.1 CR.sup.13 CH.sub.2 ; L.sup.1 is a linking group; R.sup.1 is hydrogen, alkyl of 1 to 24 carbons, aryl of 6 to 24 carbons, aralkyl of 7 to 25 carbons or halogen; R.sup.2 and R.sup.3 independently represent alkyl of 1-24 carbons, aryl of 6-24 carbons, aralkyl of 7 to 25 carbons or R.sup.2 and R.sup.3 independently may represent, or be taken together to represent the atoms chosen from C, N, O and S necessary to form a 5- or 6-membered ring; R.sup.4 and R.sup.5 independently represent hydrogen, alkyl of 1 to 24 carbons, nitro, carboxyl, mercapto, --OR.sup.11, or the atoms chosen from C, N, O, and S necessary to form a 5- or 6-membered ring or R.sup.4 and R.sup.5 may be taken together to represent the atoms chosen from C, N, O, and S necessary to form a 5- or 6-membered ring; R.sup.11 represents hydrogen or an alkyl of 1-5 carbons; R.sup.13 represents hydrogen or an alkyl of 1-24 carbons; X.sup.- is a counterion; and ##STR2## wherein: Y.sup.2 is an alkyl of 1-24 carbons, aryl of 6-24 carbons, aralkyl of 7 to 25 carbons, the atoms chosen from C, N, O, and S necessary to form a 5- or 6-membered ring or L.sup.2 CR.sup.14 CH.sub.2 ; L.sup.2 is a linking group; Y.sup.3 represents O or S; R.sup.6 is hydrogen, alkyl of 1 to 24 carbons, aryl of 6 to 24 carbons, aralkyl of 7 to 25 carbons or halogen; R.sup.7 and R.sup.8 independently represent alkyl of 1-24 carbons, aryl of 6-24 carbons, aralkyl of 7 to 25 carbons or the atoms chosen from C, N, O, and S necessary to form a 5- or 6-membered ring or R.sup.7 and R.sup.8 may be taken together to represent the atoms C, N, O and S necessary to form a 5- or 6-membered ring; R.sup.9 and R.sup.10 independently represent hydrogen, alkyl of 1 to 24 carbons, nitro, carboxyl, mercapto, --OR.sup.12, the atoms chosen from C, N, O, and S necessary to form a 5- or 6-membered ring or taken together R.sup.9 and R.sup.10 may represent the atoms chosen from C, N, O, and S necessary to form a 5- or 6-membered ring; R.sup.12 represents hydrogen or an alkyl of 1-5 carbons; R.sup.14 represents hydrogen or an alkyl of 1-24 carbons; X.sup.- is a counterion; n is an integer chosen from 0 and 1.
                            本文描述了一种改进的
咪唑硬化剂。这些新型硬化剂特别适用于在摄影元素中硬化或交联亲
水胶体。该技术的进步在于从以下组合中选择的硬化剂:##STR1## 其中:Y.sup.1代表6-24个碳原子的烷基、6-24个碳原子的芳基、7-25个碳原子的芳基烷基,所选的C、N、O和S原子必须形成5或6元环,或--L.sup.1 CR.sup.13 CH.sub.2;L.sup.1是连接基;R.sup.1是氢、1-24个碳原子的烷基、6-24个碳原子的芳基、7-25个碳原子的芳基烷基或卤素;R.sup.2和R.sup.3分别表示1-24个碳原子的烷基、6-24个碳原子的芳基、7-25个碳原子的芳基烷基,或R.sup.2和R.sup.3独立地表示或可取代所选的C、N、O和S原子,以形成5或6元环;R.sup.4和R.sup.5独立地表示氢、1-24个碳原子的烷基、硝基、羧基、巯基、--OR.sup.11,或所选的C、N、O和S原子必须形成5或6元环,或R.sup.4和R.sup.5可一起表示所选的C、N、O和S原子,以形成5或6元环;R.sup.11表示氢或1-5个碳原子的烷基;R.sup.13表示氢或1-24个碳原子的烷基;X.sup.-是一个反离子;和##STR2## 其中:Y.sup.2是1-24个碳原子的烷基、6-24个碳原子的芳基、7-25个碳原子的芳基烷基,所选的C、N、O和S原子必须形成5或6元环,或L.sup.2 CR.sup.14 CH.sub.2;L.sup.2是连接基;Y.sup.3表示O或S;R.sup.6是氢、1-24个碳原子的烷基、6-24个碳原子的芳基、7-25个碳原子的芳基烷基或卤素;R.sup.7和R.sup.8独立地表示1-24个碳原子的烷基、6-24个碳原子的芳基、7-25个碳原子的芳基烷基或所选的C、N、O和S原子,必须形成5或6元环,或R.sup.7和R.sup.8可一起表示所选的C、N、O和S原子,以形成5或6元环;R.sup.9和R.sup.10独立地表示氢、1-24个碳原子的烷基、硝基、羧基、巯基、--OR.sup.12,所选的C、N、O和S原子必须形成5或6元环,或R.sup.9和R.sup.10可一起表示所选的C、N、O和S原子,以形成5或6元环;R.sup.12表示氢或1-5个碳原子的烷基;R.sup.14表示氢或1-24个碳原子的烷基;X.sup.-是一个反离子;n是选择自0和1的整数。