Patent ID: 8529682
Filing Date: 2013-09-10
Classification: C09D,Y10T

Abstract:
1. A process for preparing an indicator composition comprising: contacting solid particles of a diacetylenic indicator agent dispersed in a liquid medium with a non-gaseous reactivity-enhancing adjuvant without heating to provide an indicator composition; wherein the solid particles of the diacetylenic indicator agent in the indicator composition have an increased polymerization reactivity as compared to an indicator composition that is identical except that it lacks the non-gaseous reactivity enhancing adjuvant; wherein the diacetylenic indicator agent comprises about 1 wt. % to about 30 wt. % of the indicator composition; wherein the diacetylenic indicator agent is insoluble in the liquid medium and is polymerizable in response to ambient temperature heat exposure to exhibit an appearance change; wherein the diacetylenic indicator agent is an acetylenic compound having the structure: wherein n is an integer from 1 to 10 and R′ is a linear alkyl group having 1 to 18 carbon atoms or wherein the diacetylenic agent is an acetylenic compound selected from the group consisting of 2,4-hexadiyn-1,6-bis(ethylurea), 2,4-hexadiyn-1,6-bis(propylurea), 2,4-hexadiyn-1,6-bis(butylurea), 2,4-hexadiyn-1,6-bis(octylurea), 2,4-hexadiyn-1,6-bis(dodecylurea), 2,4-hexadiyn-1,6-bis(octyldecylurea), 5,7-dodecadiyn-1,12 diol bis(n-octadecyl urethane), 2,4-hexadiyn-1,6-diol bis(phenylurethane), 2,4-hexadiyn-1,6-diol bis(p-methoxybenzene sulfonate), 9-(N-carbazolyl)-5,7-nonadiyn-1-ol phenylurethane, o,o′-diacetylenyldiphenyl glutarate, 2,4-hexadiyn-1,6-diol-bis-p-toluene sulfonate, 2,4-hexadiyn-1,6-diol-bis-(p-chlorobenzene sulfonate), (N,N-diacetyl)-diaminodiphenyldiacetylene, and di-(phenylureido)-diphenyldiacetylene; wherein the non-gaseous reactivity-enhancing adjuvant comprises a polymerization initiator in the amount from about 0.2 wt. % to about 10 wt. % based on the weight of the indicator composition; and the polymerization initiator is selected from the group consisting of azonitrile, alkyl peroxide, peroxyester, hydroperoxide, acyl peroxide, ketone peroxide, peroxyketal, peroxydicarbonate, redox initiator, and combinations thereof or the polymerization initiator is selected from the group consisting of a polymerization initiator having a 10-hour half-life of not more than about 50° C., an azo initiator having a 10-hour half-life of not more than about 50° C., an organic peroxide having a 10-hour half-life of not more than about 50° C., a room-temperature ketone peroxide polymerization initiator and combinations thereof.