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Silicon release agent and preparation method thereof

A technology of release agent and organic solvent, which is applied in the field of silicon release agent and its preparation, can solve the problems that cannot cover molded plastics, silicon release agent release performance, and insufficient anti-fouling performance, so as to achieve easy removal and easy release mod effect

Active Publication Date: 2018-07-24
漳州丰笙新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The above-mentioned fluorine release agent or silicon release agent still has many mold release effects, insufficient antifouling performance, or cannot cover the shortcomings of all formed plastics

Method used

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  • Silicon release agent and preparation method thereof
  • Silicon release agent and preparation method thereof
  • Silicon release agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Preparation of Release Agent 1:

[0063] In a 500ml round-bottomed flask equipped with an electromagnetic stirrer, a condenser, a thermometer, and a nitrogen gas injection supply device, nitrogen gas (0.5 Ltr / min) was circulated slightly, a magnet was put in and stirring was started, and 13.0 grams of poly(dimethacrylate) containing methacrylate was dropped. Methylsiloxane, 0.52 g of 1,1,3,3-tetramethyl dihydrodisiloxane (1,1,3,3-Tetramethyl dihydrodisiloxane), 32.0 g of tetrahydrofuran and 230 g of n-heptane. Stirring was continued at room temperature for 10 minutes to form a homogeneous solution. Next, add 0.105 g of a platinum catalyst solution containing substituents, keep stirring at a temperature of 60-65°C for 40 minutes, then add 0.65 g of vinyltrimethoxysilane, and keep stirring at a temperature of 60-65°C for 40 minutes to form The addition product solution with siloxane and siloxane backbone is finally formulated to have a volatile content of 5%, and the ins...

Embodiment 2

[0065] Preparation of release agent 2:

[0066] In a 500ml round-bottomed flask equipped with an electromagnetic stirrer, condenser, thermometer, and nitrogen injection supply device, nitrogen gas (0.5 Ltr / min) was circulated slightly, a magnet was placed and stirring was started, and 10.5 grams of monovinyl polydimethylsilane was added Oxygen (Mono-vinyl terminated PDMS), 1.2 grams of terminal dihydrogen polysiloxane, 30 grams of tetrahydrofuran and 212 grams of n-heptane. Stirring was continued at room temperature for 10 minutes to form a homogeneous solution. Next, add 0.105 g of a platinum catalyst containing an organic substituent, stir at a temperature of 50-60°C for 40 minutes, then add 1.65 g of allyl trimethoxysilane, and keep the temperature at 60-65°C. Warm stirring for 40 minutes to form a silicon addition product solution, which was finally formulated to have a volatile content of 5%, was filtered through a 100 micron (micron) filter to remove insolubles, and obt...

Embodiment 3

[0068] Preparation of release agent 3:

[0069] In a 600ml round-bottomed flask equipped with an electromagnetic stirrer, condenser, thermometer, and nitrogen injection supply device, nitrogen gas (0.5 Ltr / min) was circulated slightly, a magnet was placed and stirring was started, and 24.0 grams of polydimethylmethacrylate containing base siloxane, 6.50 grams of terminal dihydrogen polysiloxane, 42 grams of tetrahydrofuran and 420 grams of n-heptane. Stirring was continued at room temperature for 10 minutes to form a homogeneous solution. Next, add 0.105 g of a platinum catalyst solution containing substituents, keep stirring at a temperature of 40 to 50°C for 40 minutes, and then add 1.00 g of 3-methacryloxy propyltrimethoxy -silane), kept warm and stirred at 60-65°C for 90 minutes to form an addition product solution with a backbone of siloxane and silane, and finally prepared a volatile content of 5%, passing through a 100 micron (micron) filter The insolubles were remove...

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Abstract

The invention discloses a silicon release agent and a preparation method of the silicon release agent. The main ingredients of the silicon release agent are expressed through the following chemical general formula: A-L-B or A-L-Rf, the L is a bifunctional crosslinking agent (Linker); the A comprises an alkoxy silane conjugate having a hydrolysed siloxane functional group structure or an active oxygen-containing functional group conjugate; the B comprises a siloxane conjugate comprising an active functional group, or a carbon-containing oxane conjugate, or a Vinyl / Allyl / (methyl) acrylate conjugate, or an amido-containing carbon oxide conjugate; the Rf comprises a fluorine-containing carbon alkane conjugate, or a fluothane ether molecule, or a fluorinated conjugate ingredient. The silicon release agent can be applied to molding a plastic rubber resin, the polyurethane resin demolds quite easily when the silicon release agent is evenly coated on a polyurethane resin forming mold, and an even thermoset polyurethane resin molding material having no crack, gap or unfilled corner is obtained.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a silicon release agent (Mold releasing agent) and a preparation method thereof. Background technique [0002] With the progress and development of polymer plastics and special-purpose engineering plastic materials, the technology and application of these materials are more complex, and the shape and strength of their molding are required to be higher, so they must be formed under pressure, and the mold shape used It is more delicate and complex, resulting in a higher level of subsequent demoulding requirements. Therefore, the development technology of the release agent is constantly improving and innovating. [0003] Known technology: According to the patent report of US 4840675 (Daikin Kogyo Company, 1989yr), the silicone oil of Dowcoming Toray, KS-707 (Dow coming), wax, fluorine compound, surfactant, solvent and other raw materials are compounded to make release agent . Pos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C33/62
CPCB29C33/62
Inventor 何日兴丁力维
Owner 漳州丰笙新材料有限公司
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