Silicone oil demoulding agent is silicone oil as the base oil and dispersed components, a variety of auxiliaries prepared silicone oil secondary processing products, oil type, emulsion type, solvent type, grease type, aerosol type and other forms.Widely used in rubber, plastic and shell casting industries.Compared with other types of release agent, silicone oil release agent has the following characteristics: small surface tension, easy to spread, in the tiny part of the mold can also form a very thin film;It is insoluble with most polymer materials and has excellent demoulding performance.Good heat resistance and chemical stability, no chemical reaction to the material in contact, no corrosion of the mold.No smoke and smell when used;No pollution to the surface of the forming product, and can give luster;Less coating, good demoulding durability;No physiological activity.

First, there are several kinds of silicone oil for oil type release agent:

      1、 dimethyl silicone oil: widely used in rubber, plastic processing and fine casting industries.The demoulding resistance increases with the increase of the molar mass of silicone oil, and the low molar mass of silicone oil has a good affinity with the surface.Therefore, when used directly, dimethyl silicone oil with viscosity of both properties (25℃) 100-30000cp can be selected and diluted to 0.2%-2% by volume fraction with solvent.For rubber products with low forming temperature can use viscosity (25℃) 100-1000CP dimethyl silicone oil, for forming temperature is higher than fine casting and multi material such as gypsum, paper products and so on should be used higher than 1000CP dimethyl silicone oil.The dilution solvent should be selected according to the model processing temperature. Toluene, xylene, industrial gasoline, trichloroethylene and other low boiling point solvents can be selected at about 100℃.Fine casting and other high temperature occasions, can choose mineral turpentine and other high boiling solvent.

      2、Thiol-hydrocarbon silicone oil: Thiol-propyl silicone oil with a mole fraction of 0.05-0.4% and a viscosity of 100-10,000 Cp (25℃) has higher heat resistance and lower surface tension than dimethyl silicone oil, and has high demouldability and anti-oxidation and anti-corrosion properties on metal surfaces, making it suitable for demouldability of silicone rubber, fluorine rubber and various engineering plastics.

      3、amino modified silicone oil: polyurethane and other high adhesion plastic, rubber products forming demoulding agent varieties, can be used alone or with dimethyl silicone oil or MQ type silicone resin, to improve demoulding durability.

      4、 long chain alkyl silicone oil and α -methyl styrene modified silicone oil: the two are the basic components of coating silicone oil release agent.Because of their excellent extreme pressure lubricity, they can be used as release agents for metal dies used in aluminum products.

      5、polyether modified silicone oil: as a demoulding agent has the characteristics of easy coating, no solvent pollution and safety problems, demoulding agent on the surface of formed products can be washed away with water for further surface processing.It can be used for forming polyurethane foam and other rubber and plastic materials.

Two, solution type release agent

      Solution release agent is made by dissolving or dispersing silicone oil and additives in organic solvents. The content of active ingredients is generally 5-50%.According to different kinds of silicone oil, viscosity and additives, it can be divided into several series.Mainly used for shell casting, die casting, rubber and plastic products forming.

Solution silicone oil release agent to a variety of silicone oil as the main component, can also add other improved release additives such as wax, mica powder, talcum powder, clay, MQ silicone resin and polymethyl semisiloxane powder and so on.

      1、dimethyl silicone oil to add polyethylene wax, stearate, melting point -5℃, boiling point 120℃ paraffin hydrocarbon as a solvent with demolstering agent, can improve the adhesion of polyurethane foam demolstering and forming the surface state of products.

      2、dimethyl silicone oil and MQ silicone resin mixed with organic solvents prepared solution release agent, to improve the release durability has a very good effect.Such as silicone oil and MQ silicone resin according to the mixture of 80:20, the release agent prepared with solvent dilution, coated on the surface of the mold can be ABS, PPS, PA6, PBT, PC, POM and other thermoplastic resin and ethylene propylene rubber, nitrile rubber, acrylic rubber and other continuous 7-11 times, However, dimethyl silicone oil solution without MQ type silicone can be demoulded only 2-3 times.

      3、dimethyl silicone oil or methyl phenyl silicone oil and polymethyl semisiloxane spherical powder with solution silicone oil release agent, can improve the release durability and improve the migration of silicone oil.

      4、silicone oil to add mica powder, clay and other industrial gasoline preparation of the release agent, used in the tire vulcanization process between the side of the tire body and the elastic air bag between the release, can increase the isolation effect and extrusion fluidity, so that the elastic air bag can easily peel off from the inside of the tire, prolong the service life of the air bag.

Three, emulsion silicone oil release agent

      1、general emulsion release agent, by dimethyl silicone oil and surfactant in water by high-speed stirrer, colloid mill, homogenizing pump emulsifying equipment with phase emulsification method preparation.

      2、Type dimethyl silicone oil, and MQ silicone resin mixture, and anionic surfactants in water phase inversion emulsification method preparation of emulsion type silicone release agent, forming external release agent for polyurethane coating on the type box can form hard skin, high melting point, has the very good demoulding persistence, and under the high temperature of 50 ℃ above demoulding sex is not falling.

      3、 the active ingredient in the coating emulsion silicone oil release agent is long chain alkyl modified silicone oil or α -methyl styrene modified silicone oil.

      4、Emulsion silicone oil release agent prepared by emulsion polymerization of dimethylcyclosiloxane oligomer.

Four, paste silicone oil demoulding agent for silicone oil mixed with gas phase silica or precipitation silica prepared paste demoulding agent, has higher heat resistance and demoulding durability than oil, solvent and emulsion silicone oil demoulding agent.Suitable for high temperature and high pressure forming;And, because it has lubricity at the same time, it is especially suitable for vulcanization of curved rubber hose.Can also be used as polyester, nylon and other synthetic fiber melt spinning process of the spinneret hole release agent.

      Five, aerosol silicone oil release agent is dimethyl silicone oil, methyl phenyl silicone oil or long chain alkyl silicone oil as the active ingredient, freon-11, freon-22 or freon substitute as a propellant packaged in the aerosol tank.