Flame-retardant release film and preparation method thereof

Abstract

The invention relates to a flame-retardant release film and a preparation method thereof. The release film comprises a base film and a release agent, and is characterized in that: the release agent comprises the following raw materials: an organosilicon main body polymer, a cross-linking agent, a catalyst, a bridging agent, a flame retardant, reflective powder and an organic solvent, wherein the flame retardant is a phosphorus-based flame retardant containing an alcoholic hydroxyl group. According to the invention, the flame retardant containing the alcoholic hydroxyl group is added into the release agent, and the alcoholic hydroxyl group reacts with isocyanato in the bridging agent under a heating condition, so that the flame retardant is successfully grafted to the organosilicon polymerhaving certain binding force with the base film, the migration and precipitation of the flame retardant can be greatly reduced during use, and a lasting flame-retardant effect is further achieved. Theinvention unexpectedly discovers that under the mutual cooperation of the base film layer with a certain cross-linked structure, the release agent with a cross-linked structure and the reflective powder, the release film has good reflectivity, and the recognition degree of the release film is enhanced, so that the release film is processed and used under the condition of lower light, and is suitable for places with reflective requirements.

Description

technical field

[0001] The invention belongs to the field of plastic films, in particular to a flame-retardant release film and its preparation. Background technique

[0002] The release film refers to a film with a detachable surface. The release film has no stickiness or slight stickiness after contact with specific materials under limited conditions. Release film is now widely used in packaging, printing, flexible electronic circuits, films for sealing materials, die-cutting and punching processing and other industries. However, at present, most of the release films are organic polymer materials, which are extremely flammable, especially in the case of high temperature, fire or static electricity. For example, when manufacturing printed circuit boards, it is necessary to lay a release film between the metal plates in advance to prevent The adhesion between the metal plates, and in actual processing, the metal plates are in a high temperature state, and the high temperat...

Examples

Embodiment 1

[0039] Preparation of HDPE:

[0040] 1) Add the main catalyst as supported TiCl to the tank reactor replaced by nitrogen 4 / MgCl 2 , the cocatalyst is triethylaluminum, the concentration of Ti is 2×10 -5 mol / L, Al:Ti (molar ratio) is 180;

[0041] 2) 80 parts of ethylene after drying, 1 part of propylene, 1 part of 1-butene, 12.5 parts of dimethyl allyl ammonium chloride, 2.5 parts of dimethyl diallyl ammonium chloride, and 181.82 parts of n-hexane Add 18.18 parts of mixed circulating diluent composed of ethyl acetate to the tank reactor, feed hydrogen, raise the temperature to 90°C, the total pressure is 1.8MPa, and the partial pressure of hydrogen is 2%;

[0042] 3) Take out the polymerization product of the previous step and perform flash evaporation. After the flash evaporation slurry is centrifuged, the solid filter cake is recovered. The solid filter cake is then sent to a dryer protected by nitrogen to remove volatile matter, and finally the dried powder is sent to t...

Embodiment 2

[0047] The rest are the same as in Example 1, except that the dosage of the bridging agent Dow Corning Syl-Off 7367 in the release agent is 10 parts.

Embodiment 3

[0049] The rest are the same as in Example 1, except that the dosage of the bridging agent Dow Corning Syl-Off 7367 in the release agent is 20 parts.

technical field

[0001] The invention belongs to the field of plastic films, in particular to a flame-retardant release film and its preparation. Background technique

[0002] The release film refers to a film with a detachable surface. The release film has no stickiness or slight stickiness after contact with specific materials under limited conditions. Release film is now widely used in packaging, printing, flexible electronic circuits, films for sealing materials, die-cutting and punching processing and other industries. However, at present, most of the release films are organic polymer materials, which are extremely flammable, especially in the case of high temperature, fire or static electricity. For example, when manufacturing printed circuit boards, it is necessary to lay a release film between the metal plates in advance to prevent The adhesion between the metal plates, and in actual processing, the metal plates are in a high temperature state, and the high temperat...

Examples

Embodiment 1

[0039] Preparation of HDPE:

[0040] 1) Add the main catalyst as supported TiCl to the tank reactor replaced by nitrogen 4 / MgCl 2 , the cocatalyst is triethylaluminum, the concentration of Ti is 2×10 -5 mol / L, Al:Ti (molar ratio) is 180;

[0041] 2) 80 parts of ethylene after drying, 1 part of propylene, 1 part of 1-butene, 12.5 parts of dimethyl allyl ammonium chloride, 2.5 parts of dimethyl diallyl ammonium chloride, and 181.82 parts of n-hexane Add 18.18 parts of mixed circulating diluent composed of ethyl acetate to the tank reactor, feed hydrogen, raise the temperature to 90°C, the total pressure is 1.8MPa, and the partial pressure of hydrogen is 2%;

[0042] 3) Take out the polymerization product of the previous step and perform flash evaporation. After the flash evaporation slurry is centrifuged, the solid filter cake is recovered. The solid filter cake is then sent to a dryer protected by nitrogen to remove volatile matter, and finally the dried powder is sent to t...

Embodiment 2

[0047] The rest are the same as in Example 1, except that the dosage of the bridging agent Dow Corning Syl-Off 7367 in the release agent is 10 parts.

Embodiment 3

[0049] The rest are the same as in Example 1, except that the dosage of the bridging agent Dow Corning Syl-Off 7367 in the release agent is 20 parts.

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