Thermally printable paper article with elastic interspersing layer

Patent metadata

Field	Value
Publication number	US-10131172-B2
Application number	US-201715593612-A
Country	US
Kind code	B2
Filing date	May 12, 2017
Priority date	May 20, 2016
Publication date	Nov 20, 2018
Grant date	Nov 20, 2018

Abstract

The present invention relates to a thermally printable paper article with an elastomeric underlayer, which imparts improved printing performance.

First claim

The invention claimed is:

1. A coated paper article comprising:
a) a 40-μm to 500-μm thick paper substrate;
b) a 2-μm to 10-μm thick pigmented heat insulating layer comprising insulating particles selected from the group consisting of hollow sphere polymer particles, clay particles, and zeolite particles disposed over the paper substrate; and
c) a 1-μm to 30-μm thick layer, comprising thermosensitive recording material and interconnecting elastomeric polymer particles which is disposed over the pigmented heat insulating layer;
wherein the interconnecting elastomeric polymer particles have a core shell morphology, wherein the weight-to-weight ratio of the core to the shell is in the range of from 80:20 to 98:2; wherein the core comprises, based on the weight of the core, from 90 to 99.9 weight percent structural units of a monomer selected from the group consisting of ethyl acrylate, butyl acrylate, 2-ethylhexyl acrylate, and 2-propylheptyl acrylate, and from 0.1 to 10 weight percent structural units of a multiethylenically unsaturated monomer; and wherein the shell comprises structural units of at least one monomer selected from the group consisting of methyl methacrylate, styrene, acrylonitrile, and t-butyl methacrylate.

2. The coated paper article of claim 1 wherein the insulating particles are hollow sphere polymer particles or clay particles.

3. The coated paper article of claim 2 wherein the weight-to-weight ratio of the core to the shell is in the range of from 90:10 to 96:4; wherein the core comprises, based on the weight of the core, from 95 to 99.8 weight percent structural units of a monomer selected from the group consisting of ethyl acrylate, butyl acrylate, 2-ethylhexyl acrylate, and 2-propylheptyl acrylate, and from 0.1 to 10 weight percent structural units of a diethylenically unsaturated monomer.

4. The coated paper article of claim 3 wherein the core comprises, based on the weight of the core, from 95 to 99.5 weight percent structural units of butyl acrylate and from 0.5 to 5 weight percent structural units of the diethylenically unsaturated monomer; and wherein at least 90 percent of the shell comprises structural units of methyl methacrylate.

5. The coated paper article of claim 3 wherein the core comprises, based on the weight of the core, from 95 to 99.5 weight percent structural units of butyl acrylate and from 0.5 to 5 weight percent structural units of the diethylenically unsaturated monomer, which diethylenically unsaturated monomer is allyl methacrylate or divinylbenzene; and wherein at least 98 percent of the shell comprises structural units of methyl methacrylate.

Assignees

• Dow Global Technologies Llc
• Rohm & Haas

Inventors

• Einsla Brian
• Hejl Andrew
• Li Lanfang
• Roper Iii John A
• Smith Rebecca
• Yang Jian

Classifications

• D21H19/64

  Inorganic compounds · CPC title

• B41M5/502 Primary

  characterised by structural details, e.g. multilayer materials (supports, backcoats or intermediate layers for thermal dye transfer donor and receiver sheets B41M5/41, B41M5/42) · CPC title

• B41M2205/32

  Thermal receivers · CPC title

• B41M5/42

  Intermediate, {backcoat}, or covering layers {(B41M5/405 takes precedence; multilayer thermal transfer systems in general B41M5/38214)} · CPC title

• B41M2205/04

  Direct thermal recording [DTR] · CPC title