Chemistry: electrical and wave energy – Processes and products – Processes of treating materials by wave energy
Patent
1973-09-24
1976-11-02
Tillman, Murray
Chemistry: electrical and wave energy
Processes and products
Processes of treating materials by wave energy
20415916, 20415919, 260 18TN, 260 285R, 260 316, 260 37N, 260 4253, 260827, 260857R, 260857UN, 260859R, 427 36, 427 37, 427 44, 427 54, 428423, 428425, 428458, 428476, C08F 800, C08G 1806, C08L 7506, C08L 7508
Patent
active
039896099
ABSTRACT:
A prepolymer containing unsaturated hydrocarbon groups is prepared and mixed on a roller mill with one or more acrylic ester monomers and various additives to make a coating formulation of a desired viscosity. In general, low viscosity formulations are used for overprint varnishes, on paper or foil, or, with pigments, for certain types of printing inks. Higher viscosity formulations are used to apply thick films on panels, tiles or other bodies. Thin films are cured to hardness by brief exposure to ultraviolet light. Thicker films require more energetic radiation such as plasma arc and electron beam radiation. The prepolymers particularly useful for making such radiation curable coatings are the reaction products of polyether polyols and bis- or polyisocyanates and hydroxy alkenes or acrylic (or methacrylic) hydroxy esters, and, likewise, reactive polyamides modified with dicarboxy alkenes, their anhydrides or esters. A small amount of wax incorporated in the coating formulations results in coatings with release characteristics similar to those of PTFE coatings.
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Dennison Manufacturing Company
Page Thurman K.
Tillman Murray
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