Release coating material

Abstract

The invention relates to a release coating material, which consists of the following components in percentage by weight: 0.5 to 0.7 percent of octadecylcarbamate, 0.075 to 0.125 percent of polyvinyl alcohol, 0.075 to 0.125 percent of amino ester and 99.1 to 99.3 percents of toluene. The release coating material has the advantages that: the release coating material has good compatibility with a solvent, is easily dispersed after being dissolved, does not produce a precipitate and is uniform in coating and good in release effect; and the solvent can be recycled.

Description

technical field [0001] The invention relates to a release coating material, in particular to the components of the release coating material. Background technique [0002] The function of the release coating material is: after the release coating material is fully mixed with the solvent, it is evenly coated on the back substrate of the product by using the coating equipment, so that the product can be used after the glue is applied. Only when the product is unrolled smoothly can it be posted and used normally. [0003] The release coating material is used to produce substrates such as cloth base, film, paper and aluminum foil. It must be diluted with a reasonable solvent to a reasonable concentration and coated on the substrate. After coating, the solvent needs to be volatilized with heat to cure the silicone . [0004] The problem of the release type is that when the tape is in use, the unwinding force is too light or too heavy. At the same time, it is one of the importan...

AI Technical Summary

Problems solved by technology

[0007] First, the problem of silicon transfer is easy to occur, which seriously affects the viscosity of the glue; the silicon on the surface of the product is not well cured, and the adhesion is poor, so it is stuck by the glue on the product and adsorbed to the surface of the glue; so there is a layer on the surface of the glue Release agent, causing the glue not to stick

It is easy to produce too light release force, which will affect the normal unwinding. When working at high altitude, once the tape is unrolled, it will slip to the bottom, which seriously troubles the user's work and brings great inconvenience to the user;

[0008] Second, the silicon solution is easy to precipitate and uneven, resulting in more uneven silicon coating, which often makes it impossible to unwind the parent roll when rewinding, resulting in a lot of waste; because of uneven silicon coating, the unwinding of the product cannot be unwound and is rejected. Abandoned, resulting in serious waste of products

[0009] Third, polymethyl vinyl siloxane is difficult to cure, resulting in unstable quality. The curing time is more than 48 hours, occupying a large amount of storage capacity, and the curing temperature is too high. It needs to reach a high temperature of 120°C to 180°C to cure well. However, the octadecyl carbamate of the present invention can be completely cured only at a curing temperature of 50°C to 70°C.

Therefore, the original process resulted in a very high cost of burning power and energy consumption;

[0010] Fourth, the amount of silicon solvent is large

However, the original process solvent can no longer be used in polymethylvinyl siloxane after recovery, resulting in that the silicon solvent cannot be recycled, because there is 0.5-1% polymerization inhibitor in the polytoluyl vinyl siloxane solution, The characteristic of this polymerization inhibitor is the function of polymerization curing and preventing curing, but it is easy to volatilize when encountering high temperature. When recycling, it needs to volatilize toluene with steam at 130 ° C, but the polytoluene vinyl siloxane solution is released with the addition of the polymerization inhibitor. After volatilization, it is cooled and liquefied and mixed into toluene. When the toluene is recovered and used, the content of the polymerization inhibitor in the polytoluene siloxane solution exceeds 1%, which seriously prevents the polytoluene siloxane solution from solidifying. Causes the polystyryl siloxane solution to transfer easily after coating

A large amount of solvents are discharged into the air, causing serious environmental pollution. At the same time, the high cost has brought great pressure to the company's product sales