A semi-permanent silicone release agent and preparation method thereof

A semi-permanent, silicone technology, applied in the manufacturing field, can solve the problems of increasing the emission of volatile organic compounds, destroying the surface integrity of the product, reducing the service life of the mold, etc., to improve the storage stability, improve the demoulding efficiency, and improve the use. effect of temperature

Active Publication Date: 2020-08-21
厦门翔矽新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unfortunately, the use of single-use mold release agents creates a number of problems: (1) As the release agent is used repeatedly, it can build up on the mold surface to form deposits that can obscure the detailed features of the mold, which can lead to The surface features of the mold cannot be cleaned and copied onto the surface of the polymer product, so as to destroy the integrity of the product surface
(2) Due to the existence of fouling, regular cleaning of the mold is required, which leads to an increase in manpower and material resources and a reduction in production capacity; in addition, in the process of cleaning the mold, the mold will be damaged to an unacceptable degree, thereby reducing the mold service life
(3) Since the disposable release agent will be transferred to the surface of the polymer material product, it will affect the subsequent processing of the product
(4) Since the disposable release agent needs to be reapplied to the surface of the mold before each product is manufactured, this greatly increases the demand for the release agent, and also increases the emission of volatile organic compounds, which increases the production cost, And the pressure on environmental protection will also increase, so it is urgent to improve

Method used

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  • A semi-permanent silicone release agent and preparation method thereof

Examples

Experimental program
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Effect test

example 1

[0027] Take 50g of perfluoropolyether and put it into a three-necked flask, then add 240mL of deionized water, stir at 300r / min and raise the temperature to 60°C, keep it warm for 4 hours, put it into a rotary evaporator, evaporate under reduced pressure to remove water and hydrofluoric acid, To obtain perfluoropolyether carboxylic acid, take 5 g of perfluoropolyether carboxylic acid, 3 g of trifluoroethyl methacrylate, 1 g of sodium perfluorooctanoate, and 2 g of sodium perfluorooctane sulfonate, add them to 50 g of acetone, and stir at 300 r / min for 20 min , to obtain the fluorinated modified solution, get 15g tetramethyldisiloxane, 24g methyltrimethoxysilane, 18g phenyltrimethoxysilane, 5g ethyl orthosilicate, and put 50g fluorinated modified solution into the reaction In the still, stir at 200r / min for 20min, then add 18mL of deionized water, 20g of absolute ethanol, 0.20g of hydrochloric acid with a mass fraction of 10%, and react at 80°C for 5h. Distill the low boilers u...

example 2

[0029] Take 55g of perfluoropolyether and put it into a three-neck flask, then add 280mL of deionized water, stir at 360r / min and raise the temperature to 70°C, keep it warm for 4 hours, put it into a rotary evaporator, evaporate under reduced pressure to remove water and hydrofluoric acid, To obtain perfluoropolyether carboxylic acid, take 5g of perfluoropolyether carboxylic acid, 4g of trifluoroethyl methacrylate, 1g of sodium perfluorooctanoate, and 2g of sodium perfluorooctane sulfonate, add them to 60g of acetone, and stir at 360r / min for 25min , to obtain the fluorinated modified solution, get 20g tetramethyldisiloxane, 30g methyltrimethoxysilane, 25g phenyltrimethoxysilane, 10g ethyl orthosilicate, and put 55g fluorinated modified solution into the reaction In the still, stir at 240r / min for 25min, then add 20mL deionized water, 25g absolute ethanol, 0.24g mass fraction of 10% hydrochloric acid, react at 85°C for 6h, put it into a rotary evaporator after the reaction is ...

example 3

[0031]Take 60g of perfluoropolyether and put it into a three-necked bottle, then add 300mL of deionized water, stir at 400r / min and raise the temperature to 80°C, keep it warm for 5 hours, put it into a rotary evaporator, evaporate under reduced pressure to remove water and hydrofluoric acid, To obtain perfluoropolyether carboxylic acid, take 6g of perfluoropolyether carboxylic acid, 5g of trifluoroethyl methacrylate, 2g of sodium perfluorooctanoate, and 3g of sodium perfluorooctane sulfonate, add them to 80g of acetone, and stir at 400r / min for 30min , to obtain the fluorinated modified solution, get 25g tetramethyldisiloxane, 36g methyltrimethoxysilane, 32g phenyltrimethoxysilane, 15g ethyl orthosilicate, and put 60g fluorinated modified solution into the reaction In the still, stir at 300r / min for 30min, then add 25mL of deionized water, 30g of absolute ethanol, 0.25g of hydrochloric acid with a mass fraction of 10%, and react at 90°C for 8h. Distill the low boilers under r...

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Abstract

The invention relates to a semi-permanent organosilicone release agent and a preparation method thereof, and belongs to the technical field of manufacturing. Organic fluorine is added into synthetic organosilicone resin to serve as a functional monomer, fluorine-carbon side chains are enriched on the surface, fluorine atoms with the highest electronegativity surround the carbon chain to form a spiral structure, the hydrophobic effect is achieved, and meanwhile, the carbon chain is protected from being easily damaged by chemical media; through the chemical bonding effect between hydroxyl groupsand silicon atoms, the release agent which is high in surface activity, thermal stability and chemical inertness is prepared; along with volatilization of petroleum ether, macromolecular particles are gradually gathered and finally form the release agent; hydroxyl and the silicon atoms form covalent bonds and are combined with Si-O and Si-O-Si in organosilicone, thus, the surface becomes more compact, invasion of material molecules is effectively stoped through the compact release agent, and scale depositing is avoided; and the situation that the release agent is transferred to the surface ofa high molecular material product, and follow-up processing of the product is influenced is avoided, and the demolding efficiency is improved.

Description

technical field [0001] The invention relates to a semi-permanent silicone release agent and a preparation method thereof, belonging to the technical field of manufacture. Background technique [0002] The mold release agent is a functional processing aid that assists release. It is located between the mold and the molded product, and can prevent rubber, resin, plastic and other elastomers and other materials from sticking to the surface of the mold. In industrial production, in order to weaken the adhesion or adsorption between the product and the mold, a release agent is usually applied on the surface of the mold to form an interface film layer between the contact surface of the product and the mold. Good stability, the formed effective isolation film can form a chemical connection with the surface of the mold to isolate the mold and the product, thereby weakening the peeling force and allowing the molded parts to fall off quickly and easily. [0003] Release agent is an i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C33/64B29C33/60C08G77/46
CPCB29C33/60B29C33/64C08G77/46
Inventor 姜香王文新朱华
Owner 厦门翔矽新材料有限公司
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