Thermoplastic material comprising polychromic substances

Details Thermoplastic material comprising polychromic substances Thermoplastic material comprising polychromic substances

2011-03-01

2011-03-01

Walke, Amanda C. (Department: 1722)

Radiation imagery chemistry: process, composition, or product th

Imaging affecting physical property of radiation sensitive...

Radiation sensitive composition or product or process of making

C430S009000, C430S270150, C430S330000, C430S905000, C430S913000, C430S944000, C430S945000

Reexamination Certificate

active

07897320

ABSTRACT:
The present invention relates to thermoplastic material comprising polymer and at least one polychromic substance, wherein the polychromic substance is a functionalised diacetylene having the formula which has the general structure:in-line-formulae description="In-line Formulae" end="lead"?X—C≡C—C≡C—Y—(CO)n-QZin-line-formulae description="In-line Formulae" end="tail"?wherein X is H or alkyl, Y is a divalent alkylene group, Q is O, S or NR, R is H or alkyl, and Z is alkyl, and n is 0 or 1.The present invention further relates to a method of processing thermoplastic material to form a plastic article, wherein the method comprises the step of processing the thermoplastic material at a temperature greater than the melt temperature of the thermoplastic, wherein the thermoplastic material comprises polymer and at least one polychromic substance as defined above; and further comprising the step of irradiating the plastic article to colour at least a region of the plastic article.

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International Search Report mailed Jun. 24, 2009, 4 pages.

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