申请人:Salman Husein
公开号:US20110059545A1
公开(公告)日:2011-03-10
The present invention relates to a time temperature indicator for indicating a temperature change over time comprising one dimeric or trimeric spiropyran indicator of the formula I or II wherein R
1
-R
4
independently of one another is hydrogen, —C
1
C
6
alkoxy, halogen, CF
3
, —C
1
C
6
alkyl or —NO
2
, R
5
is hydrogen, halogen, —C
1
-C
6
alkoxy, —COOH, —COO—C
1
-C
6
alkyl, —CF
3
or phenyl; R
11
is hydrogen or R
11
and R
5
form together a phenyl ring; R
a
is —C
1
-C
6
alkyl R
b
is —C
1
-C
6
alkyl, or together with R
a
form a 5-6 membered ring L is a divalent linker; L′ is a trivalent linker.
本发明涉及一种时间温度指示器,用于指示随时间的温度变化,包括式I或II的二聚或三聚螺环丙酮指示剂,其中R1-R4各自独立地是氢、-C1C6烷氧基、卤素、CF3、-C1C6烷基或-NO2,R5是氢、卤素、-C1-C6烷氧基、-COOH、-COO-C1-C6烷基、-CF3或苯基;R11是氢或R11和R5共同形成一个苯环;Ra是-C1-C6烷基,Rb是-C1-C6烷基,或与Ra形成一个5-6成员环;L是二价连接剂;L'是三价连接剂。