A kind of back coating material for thermal transfer barcode ribbon and its preparation method and application
A technology of heat transfer printing and barcode, applied in the direction of coating, printing, ink ribbon, etc., can solve the problems of heat resistance and adhesion that have not been seen yet, and achieve low printing noise, good adhesion, and good heat resistance Effect
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[0031] The present invention also provides a preparation method for the back coating material for the thermal transfer barcode ribbon described in the above technical solution, comprising the following steps:
[0032] Mixing methoxysilane, methacrylate, styrene, an organic solvent and a catalyst to carry out an emulsion polymerization reaction to obtain the back coating material for the thermal transfer barcode carbon ribbon;
[0033] The methoxysilane is one or more of allyltrimethoxysilane, allyltrimethoxysilane and methacryloxytrimethoxysilane.
[0034] In the present invention, unless otherwise specified, all raw material components are commercially available products well known to those skilled in the art.
[0035] In the present invention, the methacrylate is one or more of methyl methacrylate, ethyl methacrylate, butyl methacrylate and trimethylsilyl methacrylate; when the methacrylate When the acrylic acid esters are two or more of the above-mentioned specific options...
Embodiment 1
[0047] Mix 135g of methacryloxytrimethoxysilane, 150g of trimethylsilylmethacrylate, 15g of styrene, 700g of toluene and 1g of AIBN; take 100g of the resulting mixture, heat it to the reflux of toluene, and after the reaction is initiated, control The remaining mixture was added dropwise in the state of toluene reflux, and after the dropwise addition was completed, the reaction was kept under reflux for 4 hours to obtain a back-coating material for a thermal transfer barcode ribbon with a solid content of 28%.
[0048] The number average molecular weight Mn of the polymer having the structure shown in formula I in the back coating material for the thermal transfer barcode carbon ribbon is 62179, and the weight average molecular weight Mw is 83704. Among them, m=27~31, n 1 =197~210, n 2 = 0, l 1 =126~130, l 2 = 0; R 1 For trimethylsilyl.
Embodiment 2
[0050] 100g methacryloxytrimethoxysilane, 35g allyltrimethoxysilane, 15g styrene, 90g methyl methacrylate, 60g butyl methacrylate, 15g styrene, 400g toluene, 300g butanone Mix with 1g ABVN evenly; take 100g of the obtained mixture, heat it to toluene reflux, and after the reaction is initiated, add the remaining mixture dropwise under the condition of toluene reflux. Thermal transfer barcode ribbon with back coating material.
[0051] The number average molecular weight Mn of the compound having the structure shown in formula I in the back coating material for the thermal transfer barcode carbon ribbon is 64225, and the weight average molecular weight Mw is 85146. Among them, m=27~31, n 1 =187~193, n 2 =86~92, l 1 =92~96, l 2 =42~46;R 1 is methyl, R 2 is butyl;
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