	US 12,285,961 B2
	Heat transfer agents in an image-forming composition
Richard Cook, Widnes Cheshire (GB); and Martin Walker, Widnes Cheshire (GB)
Assigned to DataLase Ltd., Widnes Cheshire (GB)
Appl. No. 17/756,925
Filed by DataLase Ltd., Widnes Cheshire (GB)
PCT Filed Dec. 11, 2020, PCT No. PCT/GB2020/053186 § 371(c)(1), (2) Date Jun. 6, 2022, PCT Pub. No. WO2021/116702, PCT Pub. Date Jun. 17, 2021.
Claims priority of application No. 1918274 (GB), filed on Dec. 12, 2019.
Prior Publication US 2023/0037133 A1, Feb. 2, 2023
Int. Cl. B41M 5/28 (2006.01); B41M 5/323 (2006.01); B41M 5/34 (2006.01); B41M 5/46 (2006.01); C09D 11/101 (2014.01)

CPC B41M 5/323 (2013.01) [B41M 5/283 (2013.01); B41M 5/285 (2013.01); B41M 5/34 (2013.01); B41M 5/465 (2013.01); C09D 11/101 (2013.01)]

29 Claims

1. A composition comprising: a near-infrared radiation absorbing compound; a colour-forming compound; and a heat transfer agent operable to facilitate heat transfer from the near-infrared radiation absorbing compound to the colour-forming compound; wherein the ratio of near-infrared radiation absorbing compound to heat transfer agent in the laser-reactive composition is 1:1 to 1:100, and the heat transfer agent is present in the composition as solid particles, and

wherein the heat transfer agent is selected from a metal oxide, a metal pyrophosphate, and a metal phosphate,

wherein the heat transfer agent has a D50 particle size distribution value of 5 μm or less,

wherein the composition further comprises one or more binder and carrier component, and

wherein the one or more binder and carrier component has a glass transition temperature of from −60 to 120° C.