Normal temperature solidifying fluorine-carbon coating for rubber roller

Abstract

The invention pertains to the technical field of surface processing materials, disclosing a normal-temperature solidifying fluorocarbon paint applied to rubber rollers. The normal-temperature solidifying paint, consists of component A and component B. Component A consists of fluorocarbon resin (50 to 80 percent) containing hydroxides in the molecular structure, organic silicone resin (3 to 15 percent) containing hydroxides in the molecular structure, extinct powder (2 to 9 percent), sumatriptan (1 to 6 percent), solidifying agent (0.3 to 2 percent) and solvent (10 to 30 percent). Hydroxy content of the fluorocarbon resin covers 1.5 percent to 2.5 percent and hydroxyl content of the organic silicone resin covers 0.5 to 1 percent; the component B is fatty poly-isocyanatopropane solidifying agent, the isocyanatopropane content is 12 to 19.6 percent; the mass ratio between the component A and the component B is 3 to 8:1. The paint is solidified by heating under normal-temperature or low temperature, and a variety of optional raw materials are available for rubber rollers; the friction coefficient of coating is 0.2 to 0.4, meeting the requirements of the rubber roller of a printer on surface friction coefficient; in terms of release property of coating, the ink ribbon is not bonded under room-temperature; the ink ribbon is not bonded in 3 second under 150 DEG C; the paint is coated on the rubber roller of the printer, and the printed pictures have the advantages of fresh colors, bleeding and color contamination-free property and sound definition. And the rubber rollers has no abnormity after 20,000 aging tests.

Description

technical field [0001] The invention relates to coatings, in particular to a normal temperature curing fluorocarbon coating for rubber rollers. Background technique [0002] The coating used on the surface of the rubber roller of the printer requires an appropriate friction coefficient and the performance of not sticking to the ribbon at room temperature or high temperature. At present, the coating used on the surface of the rubber roller of the printer is a one-component high-temperature curing fluorocarbon coating, and its curing temperature reaches above 220°C. Since the processing size of the rubber roller of the printer is very precise, the raw rubber used for the rubber roller will change in size due to the inability to withstand such a high temperature. At present, only silicone rollers can be used for the coating of one-component high-temperature curing fluorocarbon coatings without deformation , so that the choice of rubber roller raw materials is greatly limited. ...

AI Technical Summary

Problems solved by technology

Since the processing size of the rubber roller of the printer is very precise, the raw rubber used for the rubber roller will change in size due to the inability to withstand such a high temperature. At present, only silicone rollers can be used for the coating of one-component high-temperature curing fluorocarbon coatings without deformation , so that the choice of rubber roller raw materials is greatly limited

In addition, due to the expensive raw materials of silica gel and high-temperature curing fluorocarbon coatings and the energy consumption required by high temperatures, the cost of finished rubber rollers remains high.

Although the rubber roller made of one-component high-temperature curing fluorocarbon coating has a low friction coefficient, its performance of non-stick ribbon at high temperature is not stable, which brings great difficulties to processing control, and the yield rate is relatively low. Low