Molding glue as well as preparation method and application method thereof

Abstract

The invention provides a mold moistening rubber and a preparation method and an application method thereof, and belongs to the technical field of mold moistening glues.The mold moistening rubber is composed of a component A and a component B, the component A is prepared from the following raw materials in parts by weight: 100 parts of base rubber, 5 to 30 parts of filler, 8 to 40 parts of methyl silicone oil, 0 to 10 parts of high vinyl silicone oil and 0.002 to 0.05 part of a Karst platinum catalyst; the component B is prepared from the following raw materials in parts by weight: 100 parts of base rubber, 5 to 30 parts of filler, 8 to 40 parts of methyl silicone oil, 0 to 10 parts of high vinyl silicone oil, 6 to 20 parts of hydrogen-containing silicone oil and 0.01 to 2 parts of inhibitor; the weight ratio of the component A to the component B is 0.7-1.2; and the component A and / or the component B also comprises 0.1-5 parts of thermal expansion microspheres. According to the invention, the problems of poor fluidity, strong odor, easy damage, poor mold moistening effect on special-shaped parts, high use temperature and the like of the mold moistening glue in the prior art can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of mold lubricating glue, and more specifically, to a mold lubricating glue and a preparation method and an application method thereof. Background Art

[0002] Thermosetting carbon fiber composites are widely used in aerospace, automotive, electronic and electrical fields due to their advantages such as high specific strength and high specific modulus. In the wearable industry, with the improvement of living standards, people's demand for products is getting higher and higher. While meeting the performance of the product, comfort and lightness are issues that people are widely concerned about. Therefore, more and more thermosetting carbon fiber products are used in the electronics industry.

[0003] Since epoxy resin has excellent bonding properties, when the product reaches a certain amount, scale will form on the mold surface, causing the surface of the product to darken. After the mold is cleaned, the mold surface is dry and easy to stick to the film, affecting the quality of the product. Before turning to production, mold lubrication glue is needed to prevent the product from sticking to the mold. At the same time, it can protect and lubricate the mold, making it easier to demold thermosetting carbon fiber products and extending the service life of the mold. With the development of the carbon fiber industry, the demand and requirements for carbon fiber mold lubrication glue are getting higher and higher.

[0004] Currently, the existing mold lubricating glue is generally solid rubber, which has poor fluidity, strong odor, easy breakage, poor mold lubrication effect on special-shaped parts, and high operating temperature. Therefore, it is urgent to develop a mold lubricating glue suitable for various temperature gradients to achieve good mold lubrication effect. Summary of the invention

[0005] In view of the above problems, the purpose of the present invention is to provide a mold lubricating glue and a preparation method and an application method, so as to solve the problems in the prior art that the existing mold lubricating glue has poor fluidity, strong odor, easy breakage, poor mold lubrication effect on special-shaped parts and high operating temperature.

[0006] The present invention provides a mold lubricating glue, which is composed of component A and component B;

[0007] The component A comprises the following raw materials in parts by weight:

[0008] 100 parts of base rubber, 5-30 parts of filler, 8-40 parts of methyl silicone oil, 0-10 parts of high vinyl silicone oil, 0.002-0.05 parts of Custer platinum catalyst;

[0009] The component B comprises the following raw materials in parts by weight:

[0010] 100 parts of base rubber, 5-30 parts of filler, 8-40 parts of methyl silicone oil, 0-10 parts of high vinyl silicone oil, 6-20 parts of hydrogen-containing silicone oil, 0.01-2 parts of inhibitor;

[0011] Wherein, the weight ratio of component A to component B is 0.7-1.2;

[0012] Component A and / or component B also include 0.1-5 parts of heat-expandable microspheres.

[0013] In addition, a preferred solution is that the base gum in component A and the base gum in component B are both polysiloxane.

[0014] In addition, a preferred solution is that the filler in component A and the filler in component B are both synthesized by mixing the following raw materials in parts by weight: 5-30 parts of fumed silica, 0.01-0.2 parts of zinc stearate and 0.01-10 parts of calcium oxide.

[0015] In addition, a preferred solution is that the viscosity of the high vinyl silicone oil in component A is 200-200000 cs, and the high vinyl silicone oil is composed of a mixture of side chain vinyl silicone oil and terminal side chain vinyl silicone oil in any proportion.

[0016] In addition, a preferred solution is that the viscosity of the high vinyl silicone oil in component B is 200-200000 cs and it is a terminal side chain vinyl silicone oil.

[0017] In addition, a preferred embodiment is that the hydrogen-containing silicone oil is a hydrogen-containing silicone oil containing Si-H on the side chain or a hydrogen-containing silicone oil containing Si-H on both ends and the side chain.

[0018] In addition, a preferred solution is that the diameter of the heat-expandable microspheres is 1-100 μm.

[0019] In addition, a preferred embodiment is that the inhibitor is an alkynol compound.

[0020] The present invention also provides a method for preparing the above-mentioned mold lubricating glue, comprising the following steps:

[0021] Component A is prepared according to the raw material ratio of component A; component B is prepared according to the raw material ratio of component B; wherein,

[0022] The preparation method of component A comprises:

[0023] Prepare raw materials according to the raw material ratio of component A, add other raw materials to the base rubber, mix them evenly under vacuum conditions, and obtain component A;

[0024] The preparation method of component B comprises:

[0025] Prepare raw materials according to the raw material ratio of component B, add other raw materials to the base rubber, mix them evenly under vacuum conditions, and obtain component B;

[0026] The component A and the component B are mixed according to a ratio and then subjected to a vacuum degassing treatment to obtain a mold lubricating glue.

[0027] The present invention provides an application method of the above-mentioned mold lubricating glue, comprising the following steps:

[0028] After the hot pressing mold is cleaned, the mold lubricating glue is added into the hot pressing mold;

[0029] The hot pressing mold is heated so that the silicone oil precipitated from the mold lubricant after hot pressing and vulcanization on the surface of the mold cavity is evenly adhered to the surface of the mold cavity, and the mold lubricant after hot pressing and vulcanization is torn off from the surface of the hot pressing mold to complete the lubrication of the hot pressing mold.

[0030] It can be seen from the above technical scheme that the mold lubricating glue, preparation method and application method provided by the present invention can be applied to various temperature gradients through the compounding of components A and B; and has the advantages of tear resistance, non-toxicity, tastelessness, good fluidity, etc.; through the addition of heat-expandable microspheres, it can not only effectively fill the mold cavity, reduce the amount of material used, and reduce costs, but also through the pore structure of the material, it is conducive to the migration of the mold lubricant to the contact surface with the mold cavity, so that it is easy to detach from the mold cavity, and the heat-expandable microspheres can make the mold lubricating glue expand during the vulcanization process, increase the pressure in the mold, so as to facilitate the removal of the mold surface residue when taking out the product. When the mold lubricating glue provided by the present invention is used for material processing in a hot pressing mold, there is no need to apply a release agent on the mold surface, and it is environmentally friendly.

[0031] In order to achieve the above and related purposes, one or more aspects of the present invention include the features that will be described in detail later. The following description and the accompanying drawings describe some exemplary aspects of the present invention in detail. However, these aspects indicate only some of the various ways in which the principles of the present invention can be used. In addition, the present invention is intended to include all these aspects and their equivalents. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] By referring to the following description in conjunction with the accompanying drawings, and with a more complete understanding of the present invention, other objects and results of the present invention will become more apparent and easily understood.

[0033] Figure 1 A flow chart of a method for preparing a mold lubricant according to an embodiment of the present invention;

[0034] Figure 2 The figure is a flow chart of a method for applying a mold lubricant according to an embodiment of the present invention. DETAILED DESCRIPTION

[0035] In the following description, for the purpose of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. However, it is apparent that these embodiments may also be implemented without these specific details.

[0036] In view of the problems of the above-mentioned prior art, such as poor fluidity, strong odor, easy breakage, poor mold lubrication effect on special-shaped parts and high operating temperature, a mold lubrication glue and its preparation method and application method are proposed.

[0037] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0038] In order to illustrate the mold lubricating glue and the preparation method and application method provided by the present invention, Figure 1 The process of preparing the mold lubricant according to an embodiment of the present invention is shown; Figure 2 The application method flow of the mold lubricant according to an embodiment of the present invention is shown.

[0039] The mold lubricating glue provided by the present invention is composed of component A and component B;

[0040] Component A includes the following raw materials in parts by weight:

[0041] 100 parts of base rubber, 5-30 parts of filler, 8-40 parts of methyl silicone oil, 0-10 parts of high vinyl silicone oil, 0.002-0.05 parts of Custer platinum catalyst;

[0042] Component B includes the following raw materials in parts by weight:

[0043] 100 parts of base rubber, 5-30 parts of filler, 8-40 parts of methyl silicone oil, 0-10 parts of high vinyl silicone oil, 6-20 parts of hydrogen-containing silicone oil, 0.01-2 parts of inhibitor;

[0044] Wherein, the weight ratio of component A to component B is 0.7-1.2;

[0045] Component A and / or component B also include 0.1-5 parts of heat-expandable microspheres.

[0046] That is, the mold lubricating glue provided by the present invention is composed of component A and component B in a weight ratio of 0.7-1.2, and any one of the above components A and B also includes 0.1-5 parts of heat-expandable microspheres, or both the above components A and B include 0.1-5 parts of heat-expandable microspheres.

[0047] By adding heat-expandable microspheres, not only can the mold cavity be effectively filled, the amount of material used can be reduced, and the cost can be reduced, but also through the pore structure of the material, it is conducive to the migration of the mold lubricant to the contact surface with the mold cavity, so that it is easy to detach from the mold cavity, and the heat-expandable microspheres can make the mold lubricant expand during the vulcanization process, increase the pressure in the mold, so as to facilitate the removal of the mold surface residue when the product is taken out. The mold lubricant provided by the present invention is compounded by the components of component A and component B, and can be applied to various temperature gradients; and has the advantages of tear resistance, non-toxic, tasteless, good fluidity, etc.; in the prior art, when the hot pressing mold is used, after the previous product is demoulded, the hot pressing mold needs to be cleared, and when the hot pressing mold is used again, in order to ensure that the product is smoothly demoulded, it is necessary to apply a release agent in the hot pressing mold after the mold is cleared. The release agent currently on the market generally contains F elements, which is unfriendly to the environment and harmful to the human body. After the mold lubricant provided by the present invention is used to clear the hot pressing mold, there is no need to apply a release agent to the mold, which is environmentally friendly and harmless to the human body. As a preferred embodiment of the present invention, the base gum in component A and the base gum in component B are both polysiloxane.

[0048] Specifically, polysiloxane has excellent thermal stability, good chemical stability and low surface tension, which makes the mold lubricant as a whole have wettability, anti-adhesion and good fluidity. When the hot pressing mold is heated and vulcanized, it is ensured to flow into every corner of the mold cavity, so that the silicone oil precipitated from the mold lubricant is evenly adhered to the entire mold cavity surface, and the mold lubrication effect is good, which can effectively solve the problem of uneven mold lubrication of hot pressing molds for special-shaped parts with complex structures.

[0049] Furthermore, the base rubber in component A and the base rubber in component B are preferably polysiloxane containing Si-Vi. Si-Vi bonds can exhibit excellent mechanical properties under high pressure conditions, have good ductility, and can exhibit excellent tear resistance after hot pressing and vulcanization of the mold lubricating glue.

[0050] As a preferred embodiment of the present invention, the filler in component A and the filler in component B are both synthesized by mixing the following raw materials in parts by weight: 5-30 parts of fumed silica, 0.01-0.2 parts of zinc stearate and 0.01-10 parts of calcium oxide.

[0051] Specifically, the strength of the overall material of the mold lubricant can be improved by adding fumed silica, the stability of the mold lubricant can be improved by adding an appropriate amount of calcium oxide, and the molding demolding property can be improved by adding zinc stearate, thereby reducing the surface friction of the mold lubricant without affecting the basic properties of the mold lubricant.

[0052] As a preferred embodiment of the present invention, the high vinyl silicone oil in component A has a viscosity of 200-200000 cs, and is composed of side chain vinyl silicone oil and terminal side chain vinyl silicone oil mixed in any proportion.

[0053] Specifically, the side chain vinyl silicone oil has good flexibility, high temperature resistance and wear resistance due to the vinyl group in its molecular structure. It makes the mold lubricant more soft and elastic, can still maintain stable performance under high temperature environment, and can also enhance the wear resistance of the mold lubricant. The terminal side chain vinyl silicone oil has smoothness, softness, brightness and heat and weather resistance. When used in combination with the side chain vinyl silicone oil, it can increase the softness and smoothness of the mold lubricant.

[0054] As a preferred embodiment of the present invention, the high vinyl silicone oil in component B has a viscosity of 200-200000 cs and is a terminal side chain vinyl silicone oil.

[0055] Specifically, the high vinyl silicone oil in component B uses terminal side chain vinyl silicone oil to increase the softness and smoothness of the mold lubricant, and can also quickly react with the hydrogen-containing silicone oil in the component to increase the preparation speed of component B.

[0056] As a preferred embodiment of the present invention, the hydrogen-containing silicone oil is a hydrogen-containing silicone oil containing Si-H at the side chain or a hydrogen-containing silicone oil containing Si-H at both ends and the side chain.

[0057] Specifically, hydrogen-containing silicone oil containing Si—H in the side chain or hydrogen-containing silicone oil containing Si—H at both ends and the side chain can be polymerized with the base rubber to prepare the organosilicon intermediate.

[0058] As a preferred embodiment of the present invention, the diameter of the heat-expandable microspheres is 1-100 μm.

[0059] Specifically, by adding heat-expandable microsphere material, not only can the mold cavity be effectively filled, but also the amount of mold lubricant used can be greatly reduced to reduce costs. At the same time, its own pore structure is conducive to the migration of the mold lubricant to the contact surface with the mold cavity, so that it is easy to detach from the mold cavity. In addition, the heat-expandable microspheres cause the silicone rubber mold lubricant to expand during the vulcanization process, increasing the pressure inside the mold so that the residue on the mold surface can be removed when the product is taken out.

[0060] As a preferred embodiment of the present invention, the inhibitor is an alkynol compound.

[0061] The method for preparing the above-mentioned mold lubricating glue provided by the present invention comprises the following steps:

[0062] Step S1, preparing component A according to the raw material ratio of component A; preparing component B according to the raw material ratio of component B; wherein,

[0063] The preparation method of component A comprises:

[0064] Prepare raw materials according to the raw material ratio of component A, add other raw materials to the base rubber, mix them evenly under vacuum conditions, and obtain component A;

[0065] The preparation method of component B comprises:

[0066] Prepare raw materials according to the raw material ratio of component B, add other raw materials to the base glue, mix them evenly under vacuum conditions to obtain component B; step S2, mix component A and component B according to the ratio, and perform vacuum degassing to obtain mold lubricating glue.

[0067] The application method of the mold lubricating glue provided by the present invention comprises the following steps:

[0068] Step A1, after cleaning the hot pressing mold, adding mold lubrication glue into the hot pressing mold;

[0069] Step A2, heating the hot pressing mold so that the silicone oil precipitated from the mold lubricant after hot pressing and vulcanization on the mold cavity surface is evenly attached to the mold cavity surface, and the mold lubricant after hot pressing and vulcanization is torn off from the surface of the hot pressing mold to complete the lubrication of the hot pressing mold.

[0070] In order to better explain the mold lubricating glue and its technical effects provided by the present invention in detail, the following examples are given:

[0071] Example 1

[0072] Preparation of Component A:

[0073] Add 5 parts of filler, 8 parts of methyl silicone oil, 0.002 parts of Custer platinum catalyst and 0.1 parts of thermal expansion microspheres to 100 parts of polysiloxane, mix well under vacuum conditions to obtain component A.

[0074] The filler is synthesized by mixing the following raw materials in parts by weight: 30 parts of fumed silica, 0.2 parts of zinc stearate and 10 parts of calcium oxide.

[0075] High vinyl silicone oil is composed of side chain vinyl silicone oil and terminal side chain vinyl silicone oil mixed in any proportion.

[0076] The diameter of the heat-expandable microspheres is 1 μm.

[0077] Preparation of component B:

[0078] Add 20 parts of filler, 5 parts of high vinyl silicone oil, 25 parts of methyl silicone oil, 10 parts of hydrogen silicone oil, 1 part of inhibitor, and 3 parts of thermal expansion microspheres to 100 parts of polysiloxane, mix well under vacuum conditions, and obtain component B. Among them,

[0079] The filler is synthesized by mixing the following raw materials in parts by weight: 30 parts of fumed silica, 0.2 parts of zinc stearate and 10 parts of calcium oxide.

[0080] High vinyl silicone oil is a terminal side chain vinyl silicone oil.

[0081] The hydrogen-containing silicone oil is a hydrogen-containing silicone oil containing Si-H at the side chain or a hydrogen-containing silicone oil containing Si-H at both ends and the side chain.

[0082] The diameter of the heat-expandable microspheres is 50 μm.

[0083] The inhibitor is an acetylenic alcohol compound.

[0084] Component A and component B are mixed at a weight ratio of 0.7, and then subjected to vacuum degassing treatment to obtain a mold lubricating glue.

[0085] Example 2

[0086] 30 parts of filler, 40 parts of methyl silicone oil, 10 parts of high vinyl silicone oil, 0.05 parts of Custer platinum catalyst and 5 parts of thermal expansion microspheres were added to 100 parts of polysiloxane, and mixed evenly under vacuum conditions to obtain component A. Among them,

[0087] The filler is synthesized by mixing the following raw materials in parts by weight: 30 parts of fumed silica, 0.2 parts of zinc stearate and 10 parts of calcium oxide.

[0088] High vinyl silicone oil is composed of side chain vinyl silicone oil and terminal side chain vinyl silicone oil mixed in any proportion.

[0089] The diameter of the heat-expandable microspheres is 100 μm.

[0090] Preparation of component B:

[0091] Add 30 parts of filler, 10 parts of high vinyl silicone oil, 40 parts of methyl silicone oil, 20 parts of hydrogen silicone oil, 2 parts of inhibitor, and 5 parts of thermal expansion microspheres to 100 parts of polysiloxane, mix well under vacuum conditions, and obtain component B. Among them,

[0092] The filler is synthesized by mixing the following raw materials in parts by weight: 30 parts of fumed silica, 0.2 parts of zinc stearate and 10 parts of calcium oxide.

[0093] High vinyl silicone oil is a terminal side chain vinyl silicone oil.

[0094] The hydrogen-containing silicone oil is a hydrogen-containing silicone oil containing Si-H at the side chain or a hydrogen-containing silicone oil containing Si-H at both ends and the side chain.

[0095] The diameter of the heat-expandable microspheres is 100 μm.

[0096] The inhibitor is an acetylenic alcohol compound.

[0097] Component A and component B are mixed in a weight ratio of 1.2, and then subjected to vacuum degassing treatment to obtain a mold lubricating glue.

[0098] Example 3

[0099] 20 parts of filler, 20 parts of methyl silicone oil, 5 parts of high vinyl silicone oil, 0.01 parts of Custer platinum catalyst and 3 parts of thermal expansion microspheres were added to 100 parts of polysiloxane, and mixed evenly under vacuum conditions to obtain component A. Among them,

[0100] The filler is synthesized by mixing the following raw materials in parts by weight: 30 parts of fumed silica, 0.2 parts of zinc stearate and 10 parts of calcium oxide.

[0101] High vinyl silicone oil is composed of side chain vinyl silicone oil and terminal side chain vinyl silicone oil mixed in any proportion.

[0102] The diameter of the heat-expandable microspheres is 50 μm.

[0103] Preparation of component B:

[0104] Add 20 parts of filler, 5 parts of high vinyl silicone oil, 20 parts of methyl silicone oil, 10 parts of hydrogen silicone oil, 1 part of inhibitor, and 3 parts of thermal expansion microspheres to 100 parts of polysiloxane, mix well under vacuum conditions, and obtain component B. Among them,

[0105] The filler is synthesized by mixing the following raw materials in parts by weight: 30 parts of fumed silica, 0.2 parts of zinc stearate and 10 parts of calcium oxide.

[0106] High vinyl silicone oil is a terminal side chain vinyl silicone oil.

[0107] The hydrogen-containing silicone oil is a hydrogen-containing silicone oil containing Si-H at the side chain or a hydrogen-containing silicone oil containing Si-H at both ends and the side chain.

[0108] The diameter of the heat-expandable microspheres is 50 μm.

[0109] The inhibitor is an acetylenic alcohol compound.

[0110] Component A and component B are mixed in a weight ratio of 1:1, and then subjected to vacuum degassing treatment to obtain a mold lubricating glue.

[0111] Example 4

[0112] 20 parts of filler, 20 parts of methyl silicone oil, 5 parts of high vinyl silicone oil, 0.01 parts of Custer platinum catalyst and 3 parts of thermal expansion microspheres were added to 100 parts of polysiloxane, and mixed evenly under vacuum conditions to obtain component A. Among them,

[0113] The filler is synthesized by mixing the following raw materials in parts by weight: 30 parts of fumed silica, 0.2 parts of zinc stearate and 10 parts of calcium oxide.

[0114] High vinyl silicone oil is composed of side chain vinyl silicone oil and terminal side chain vinyl silicone oil mixed in any proportion.

[0115] The diameter of the heat-expandable microspheres is 50 μm.

[0116] Preparation of component B:

[0117] Add 20 parts of filler, 5 parts of high vinyl silicone oil, 20 parts of methyl silicone oil, 10 parts of hydrogen silicone oil and 1 part of inhibitor to 100 parts of polysiloxane, mix well under vacuum conditions to obtain component B.

[0118] The filler is synthesized by mixing the following raw materials in parts by weight: 30 parts of fumed silica, 0.2 parts of zinc stearate and 10 parts of calcium oxide.

[0119] High vinyl silicone oil is a terminal side chain vinyl silicone oil.

[0120] The hydrogen-containing silicone oil is a hydrogen-containing silicone oil containing Si-H at the side chain or a hydrogen-containing silicone oil containing Si-H at both ends and the side chain.

[0121] The inhibitor is an acetylenic alcohol compound.

[0122] Component A and component B are mixed in a weight ratio of 1:1, and then subjected to vacuum degassing treatment to obtain a mold lubricating glue.

[0123] Example 5

[0124] Add 20 parts of filler, 20 parts of methyl silicone oil, 5 parts of high vinyl silicone oil, and 0.01 parts of Custer platinum catalyst to 100 parts of polysiloxane, and mix them evenly under vacuum conditions to obtain component A.

[0125] The filler is synthesized by mixing the following raw materials in parts by weight: 30 parts of fumed silica, 0.2 parts of zinc stearate and 10 parts of calcium oxide.

[0126] High vinyl silicone oil is composed of side chain vinyl silicone oil and terminal side chain vinyl silicone oil mixed in any proportion.

[0127] Preparation of component B:

[0128] Add 20 parts of filler, 5 parts of high vinyl silicone oil, 20 parts of methyl silicone oil, 10 parts of hydrogen silicone oil, 1 part of inhibitor, and 3 parts of thermal expansion microspheres to 100 parts of polysiloxane, mix well under vacuum conditions, and obtain component B. Among them,

[0129] The filler is synthesized by mixing the following raw materials in parts by weight: 30 parts of fumed silica, 0.2 parts of zinc stearate and 10 parts of calcium oxide.

[0130] High vinyl silicone oil is a terminal side chain vinyl silicone oil.

[0131] The hydrogen-containing silicone oil is a hydrogen-containing silicone oil containing Si-H at the side chain or a hydrogen-containing silicone oil containing Si-H at both ends and the side chain.

[0132] The diameter of the heat-expandable microspheres is 50 μm.

[0133] The inhibitor is an acetylenic alcohol compound.

[0134] Component A and component B are mixed in a weight ratio of 1:1, and then subjected to vacuum degassing treatment to obtain a mold lubricating glue.

[0135] Example 6

[0136] Add 20 parts of filler, 20 parts of methyl silicone oil, 5 parts of high vinyl silicone oil, and 0.01 parts of Custer platinum catalyst to 100 parts of polysiloxane, and mix them evenly under vacuum conditions to obtain component A.

[0137] The filler is synthesized by mixing the following raw materials in parts by weight: 30 parts of fumed silica, 0.2 parts of zinc stearate and 10 parts of calcium oxide.

[0138] High vinyl silicone oil is composed of side chain vinyl silicone oil and terminal side chain vinyl silicone oil mixed in any proportion.

[0139] Preparation of component B:

[0140] Add 20 parts of filler, 5 parts of high vinyl silicone oil, 20 parts of methyl silicone oil, 10 parts of hydrogen silicone oil and 1 part of inhibitor to 100 parts of polysiloxane, mix well under vacuum conditions to obtain component B.

[0141] The filler is synthesized by mixing the following raw materials in parts by weight: 30 parts of fumed silica, 0.2 parts of zinc stearate and 10 parts of calcium oxide.

[0142] High vinyl silicone oil is a terminal side chain vinyl silicone oil.

[0143] The hydrogen-containing silicone oil is a hydrogen-containing silicone oil containing Si-H at the side chain or a hydrogen-containing silicone oil containing Si-H at both ends and the side chain.

[0144] The inhibitor is an acetylenic alcohol compound.

[0145] Component A and component B are mixed in a weight ratio of 1:1, and then subjected to vacuum degassing treatment to obtain a mold lubricating glue.

[0146] The same amount of the mold lubricating glue prepared in Examples 1-6 was added to four hot pressing molds with the same structure and after mold cleaning, and the six molds were heated to between 110-200° C. and vulcanized for 5-10 minutes, and then the vulcanized mold lubricating glue was taken out.

[0147] In Example 1-5, when the molding lubricating glue is taken out, the lubricating glue can bring out the dirt remaining on the mold surface, and no adhesion to the mold surface is found. In the subsequent product processing, the mold can be demolded smoothly without using a release agent. In Example 6, when the molding lubricating glue is taken out, the molded lubricating glue has no residue, and in the subsequent product processing, there is partial adhesion during demolding without using a release agent.

[0148] It should be noted that this embodiment is only for the purpose of explaining in detail the mold lubricating glue, preparation method and application method provided by the present invention in practical applications, and does not limit the technical solution provided by the present invention.

[0149] It can be seen from the above specific embodiments that the mold lubricating glue, preparation method and application method provided by the present invention can be applied to various temperature gradients through the compounding of components A and B; and has the advantages of tear resistance, non-toxicity, tastelessness, good fluidity, etc.; through the addition of heat-expandable microspheres, it can not only effectively fill the mold cavity, reduce the amount of material used, and reduce costs, but also through the pore structure of the material, it is conducive to the migration of the mold lubricant to the contact surface with the mold cavity, so that it is easy to detach from the mold cavity, and the heat-expandable microspheres can make the mold lubricating glue expand during the vulcanization process, increase the pressure in the mold, so as to facilitate the removal of the mold surface residue when taking out the product. When the mold lubricating glue provided by the present invention is used for material processing in a hot pressing mold, there is no need to apply a release agent on the mold surface, and it is environmentally friendly.

[0150] As described above with reference to the accompanying drawings, the mold lubricating glue, preparation method and application method proposed in the present invention are described in an exemplary manner. However, those skilled in the art should understand that various improvements can be made to the mold lubricating glue, preparation method and application method proposed in the present invention without departing from the content of the present invention. Therefore, the protection scope of the present invention should be determined by the content of the attached claims.

Claims

1. A mold lubricating glue, characterized in that: It is composed of component A and component B; The component A comprises the following raw materials in parts by weight: 100 parts of base rubber, 5-30 parts of filler, 8-40 parts of methyl silicone oil, 0-10 parts of high vinyl silicone oil, 0.002-0.05 parts of Custer platinum catalyst; The component B comprises the following raw materials in parts by weight: 100 parts of base rubber, 5-30 parts of filler, 8-40 parts of methyl silicone oil, 0-10 parts of high vinyl silicone oil, 6-20 parts of hydrogen-containing silicone oil, 0.01-2 parts of inhibitor; Wherein, the weight ratio of component A to component B is 0.7-1.2; Component A and / or component B also include 0.1-5 parts of heat-expandable microspheres.

2. The mold lubricant according to claim 1, characterized in that: The base gum in component A and the base gum in component B are both polysiloxane.

3. The mold lubricating glue according to claim 1, characterized in that: The filler in component A and the filler in component B are both synthesized by mixing the following raw materials in parts by weight: 5-30 parts of fumed silica, 0.01-0.2 parts of zinc stearate and 0.01-10 parts of calcium oxide.

4. The mold lubricating glue according to claim 1, characterized in that: The high vinyl silicone oil in the component A has a viscosity of 200-200000 cs, and is composed of side chain vinyl silicone oil and terminal side chain vinyl silicone oil mixed in any proportion.

5. The mold lubricant according to claim 1, characterized in that: The high vinyl silicone oil in the component B has a viscosity of 200-200000 cs and is a terminal side chain vinyl silicone oil.

6. The mold lubricant according to claim 1, characterized in that: The hydrogen-containing silicone oil is a hydrogen-containing silicone oil containing Si-H in the side chain or a hydrogen-containing silicone oil containing Si-H at both ends and the side chain.

7. The mold lubricant according to claim 1, characterized in that: The diameter of the heat-expandable microspheres is 1-100 μm.

8. The mold lubricant according to claim 1, characterized in that: The inhibitor is an alkynol compound.

9. A method for preparing a mold lubricant according to any one of claims 1 to 8, characterized in that: The steps include: Prepare component A according to the raw material ratio of component A; Component B is prepared according to the raw material ratio of component B; wherein, The preparation method of component A comprises: Prepare raw materials according to the raw material ratio of component A, add other raw materials to the base rubber, mix them evenly under vacuum conditions, and obtain component A; The preparation method of component B comprises: Prepare raw materials according to the raw material ratio of component B, add other raw materials to the base rubber, mix them evenly under vacuum conditions, and obtain component B; The component A and the component B are mixed according to a ratio and then subjected to a vacuum degassing treatment to obtain a mold lubricating glue.

10. A method for applying the mold lubricant according to any one of claims 1 to 8, characterized in that: The steps include: After the hot pressing mold is cleaned, the mold lubricating glue is added into the hot pressing mold; The hot pressing mold is heated so that the silicone oil precipitated from the mold lubricant after hot pressing and vulcanization on the surface of the mold cavity is evenly adhered to the surface of the mold cavity, and the mold lubricant after hot pressing and vulcanization is torn off from the surface of the hot pressing mold to complete the lubrication of the hot pressing mold.

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