阅读说明：本技术 一种高粘度聚合物基阻尼材料离型剂及其制备方法 (High-viscosity polymer-based damping material release agent and preparation method thereof ) 是由 马驰 唐文睿 吴家豪 于 2021-09-10 设计创作，主要内容包括：一种高粘度聚合物基阻尼材料离型剂及其制备方法,涉及一种阻尼材料离型剂及其制备方法,该离型剂包含5.0%～15.0%质量份的主离型剂聚偏氟乙烯、1.0%～10.0%质量分的助脱模剂切片石蜡、0.1%～10.0%质量份的分散剂、65.0%～94.9%质量份的溶剂,所配制的离型剂在铸铝模具上对含有大量无机组分的聚氨酯、丙烯酸酯或环氧树脂等高粘度聚合物基阻尼制品可在120℃以下长期使用,离型效果均为I级,离型次数可达10次以上,且其生产成本低,制备工艺简单、存储性好、离型性优良,可有效的提高高粘度聚合物基阻尼制品的离型效率。(The release agent comprises 5.0-15.0 mass percent of main release agent polyvinylidene fluoride, 1.0-10.0 mass percent of assistant release agent sliced paraffin, 0.1-10.0 mass percent of dispersing agent and 65.0-94.9 mass percent of solvent, and the prepared release agent can be used for polyurethane, acrylic ester or epoxy resin high-viscosity polymer-based damping products containing a large amount of inorganic components for a long time below 120 ℃ on an aluminum casting die, the release effect is I grade, the release frequency can reach more than 10 times, the preparation process is simple, the storage property is good, the release property is excellent, and the release efficiency of the high-viscosity polymer-based damping products can be effectively improved.)

1. The high-viscosity polymer-based damping material release agent is characterized by comprising a main release agent, a dispersing auxiliary agent and a solvent; the main release agent is formed by compounding polyvinylidene fluoride powder and sliced paraffin, wherein the polyvinylidene fluoride powder accounts for 5.0-15.0% of the release agent by mass, and the sliced paraffin accounts for 1.0-10.0% of the release agent by mass; the dispersing aid is one or a mixture of more of polyquaternary ammonium salt, polylauryl diethanol amine, glycerin fatty acid ester, propylene glycol fatty acid ester, xylitol ester, stearoyl lactylate, sorbitol ester, zinc stearate, oleic acid, polyoxyethylene sorbitol beeswax, oxyethylene sorbitan monooleate (Tween series), sorbitan fatty acid ester (Span series) and fatty alcohol polyoxyethylene ether (AO series) glycol fatty acid ester, and the mass percentage of the dispersing aid in the release agent is 0.1-10.0%.

2. The high viscosity polymer-based damping material release agent according to claim 1, wherein the solvent comprises one or more of glycol ether, n-octane, xylene, mineral spirits, ethers or lipids.

3. A preparation method of a high-viscosity polymer-based damping material release agent is characterized by comprising the following preparation processes:

adding a solvent and a dispersing aid into a reactor at the temperature of 20-40 ℃, fully stirring for 10-20 min at a constant temperature, then adding sliced paraffin into the reactor, stirring for 10-20 min at the stirring speed of 500 r-2000 r/min, raising the temperature to 50-80 ℃ after the system is fully dissolved and mixed, adding polyvinylidene fluoride powder into the reactor for multiple times according to the proportion, fully stirring for 0.5-1 h (the rotating speed is 2000 r/min), taking out, immediately re-emulsifying for 30min by using a high-speed emulsifying machine, and thus obtaining the polymer-based damping material release agent.

Technical Field

The invention relates to a damping material release agent and a preparation method thereof, in particular to a high-viscosity polymer-based damping material release agent and a preparation method thereof.

Background

Damping materials are materials that dissipate solid mechanical vibrational energy into thermal energy, primarily for vibration and noise control. The sound-absorbing and vibration-damping material has good sound-absorbing and vibration-damping characteristics, so that the sound-absorbing and vibration-damping material is widely applied to industries such as automobiles, trains, transportation facilities, mechanical manufacturing, aerospace, earthquake prevention and disaster reduction and the like. Among all types of damping materials, polymer-based damping materials are widely used because of their best damping properties. However, in the process of forming the polymer-based damping material, a release agent is needed to prevent the adhesion between the polymer matrix and the mold, and particularly, in order to improve the damping performance of the polymer-based damping material, a large amount of inorganic functional particles are often added into a polymer system, so that the viscosity of the system is rapidly increased, and a high-viscosity reaction material is usually required to be subjected to a curing reaction at a high temperature, so that the release of the product in the forming process becomes more difficult. In addition, many damping materials usually have a porous structure, and the strength of the material itself is low, which can cause serious defects on the surface of the product if the release effect is not ideal. Therefore, the development of the novel liquid release agent which has good release effect, is not easy to remain on the surface of the mold, is environment-friendly and safe, and can ensure that the surface of the foam product has an open-cell structure has important practical application value. The release agent of the high-viscosity polymer-based damping material most commonly used in the market at present is a wax release agent, and the composition of the release agent is mainly composed of paraffin. For example, patent CN 101913215a discloses a vibration-damping polyurethane release agent special for automobile ornaments and a preparation method thereof, wherein the release agent mainly comprises 10.0% of stearic acid compounds, 5.0% of paraffin, 0.2% of paraffin emulsifier and 85.0% of solvent. Although the wax-based release agent can be smoothly released when in use, the wax-based release agent is easy to decompose and pollute a mould when the temperature of the mould is higher due to low melting point of a paraffin component in the release agent after being used for many times, and the release effect is not ideal for a complex high-viscosity system foaming product. Patent CN200910140592.6 discloses a release for forming polyurethane damping foam, which comprises the following main components: 0.01 to 10 parts by weight of oil-soluble oligomer, 1.0 to 25 parts by weight of oleophilic resin and 0.01 to 10 parts by weight of surfactant, and 5 to 20 parts by weight of ethers and 50 to 60 parts by weight of water. The release agent for the polymer-based damping material prepared by adopting the proportion has good stability and can be smoothly released, but the release agent is not suitable for high-temperature release due to the complex preparation mode and the high-temperature volatile substances contained in the components of the release agent.

Disclosure of Invention

The invention aims to provide a high-viscosity polymer-based damping material release agent and a preparation method thereof.

The purpose of the invention is realized by the following technical scheme:

a high-viscosity polymer-based damping material release agent comprises a main release agent, a dispersing aid and a solvent; the main release agent is formed by compounding polyvinylidene fluoride powder and sliced paraffin, wherein the polyvinylidene fluoride powder accounts for 5.0-15.0% of the release agent by mass, and the sliced paraffin accounts for 1.0-10.0% of the release agent by mass; the dispersing aid is one or a mixture of more of polyquaternary ammonium salt, polylauryl diethanol amine, glycerin fatty acid ester, propylene glycol fatty acid ester, xylitol ester, stearoyl lactylate, sorbitol ester, zinc stearate, oleic acid, polyoxyethylene sorbitol beeswax, oxyethylene sorbitan monooleate (Tween series), sorbitan fatty acid ester (Span series) and fatty alcohol polyoxyethylene ether (AO series) glycol fatty acid ester, and the mass percentage of the dispersing aid in the release agent is 0.1-10.0%.

The high-viscosity polymer-based damping material release agent comprises a solvent, wherein the solvent comprises one or a mixture of more of glycol ether, n-octane, xylene, solvent oil, ether or grease.

A preparation method of a high-viscosity polymer-based damping material release agent comprises the following preparation processes:

adding a solvent and a dispersing aid into a reactor at the temperature of 20-40 ℃, fully stirring for 10-20 min at a constant temperature, then adding sliced paraffin into the reactor, stirring for 10-20 min at the stirring speed of 500 r-2000 r/min, raising the temperature to 50-80 ℃ after the system is fully dissolved and mixed, adding polyvinylidene fluoride powder into the reactor for multiple times according to the proportion, fully stirring for 0.5-1 h (the rotating speed is 2000 r/min), taking out, immediately re-emulsifying for 30min by using a high-speed emulsifying machine, and thus obtaining the polymer-based damping material release agent.

The invention has the advantages and effects that:

1. the invention solves the problems of low melting point of paraffin components in a wax-based release agent, easy decomposition at higher mold temperature and low release efficiency on a high-viscosity system in the conventional polymer-based damping material release agent, and provides a method for compounding high-temperature-resistant polyvinylidene fluoride powder and slice paraffin so as to obtain the high-viscosity polymer-based damping material release agent.

2. The release agent comprises 5.0-15.0 mass% of polyvinylidene fluoride as a main release agent, 1.0-10.0 mass% of assistant release agent sliced paraffin, 0.1-10.0 mass% of dispersing agent and 65.0-94.9 mass% of solvent, and can be used for a long time below 120 ℃ on an aluminum casting mold for high-viscosity polymer-based damping products such as polyurethane, acrylic ester or epoxy resin containing a large amount of inorganic components, the release effect is I level, the release frequency can reach more than 10 times, the production cost is low, and the release efficiency of the high-viscosity polymer-based damping products can be effectively improved.

3. The innovation of the invention is represented in the following steps: the polyvinylidene fluoride powder with high melting point is used for partially replacing the traditional paraffin material, and the high melting point sliced paraffin is added to prepare the novel damping material release agent, so that the novel damping material release agent has an excellent demolding effect on the high-viscosity polymer-based damping material needing high-temperature processing. And surfactant such as polyquaternium is utilized to improve the interface effect and improve the storage stability of the product. The release agent for the high-viscosity polymer-based damping material prepared by the invention has the advantages of low production cost, good high-temperature resistance and good emulsion stability, and simultaneously greatly reduces the time required by the preparation of the high-viscosity polymer-based damping material, reduces the residue of the release agent on the surface of a polymer, and meets the performance requirements of high-viscosity polymer-based damping material products on the release agent.

Drawings

FIG. 1 is a photograph showing the effect of a release agent of a high viscosity polymer-based damping material prepared in example 1 of the present invention after being left for 30 days;

FIG. 2 is a photograph showing the effect of the release agent for a high viscosity polymer-based damping material prepared in comparative example 1 of the present invention after being left for 30 days;

FIG. 3 is a photo of the release effect of the release agent of the high viscosity polymer-based damping material prepared in example 1 of the present invention;

FIG. 4 is a photo showing the release effect of the release agent of the high viscosity polymer-based damping material prepared in comparative example 1 of the present invention.

Detailed Description

The present invention will be described in detail with reference to the embodiments shown in the drawings.

Example 1

Adding 0.1g of hexa-polytriazine hexadecyl trimethyl quaternary ammonium salt, 0.5g of Span60 and 89.4g of n-octane into a reactor at the temperature of 30 ℃, stirring for 10min at constant temperature, then adding 1.0g of sliced paraffin into the reactor, fully stirring for 15min (the stirring speed is 5000 r/min), raising the temperature to 65 ℃ after the system is fully dissolved and mixed, adding 9.0g of polyvinylidene fluoride powder into the reactor for 3 times, fully stirring for 30min (the rotating speed is 2000 r/min), taking out, and immediately re-emulsifying for 30min by using a high-speed emulsifying machine to prepare the release agent of the polymer-based damping material.

Emulsion stability: after being centrifuged for 5 minutes by a centrifuge at 3000r/min, the emulsion is placed for 30 days at room temperature, and the release agent emulsion prepared by the formula is not demulsified and not delaminated.

And (3) release effect: heating the mould to 110 ℃, uniformly spraying a release agent on the surface of the mould, drying the solvent by using a spray gun, quickly and uniformly stirring the high-viscosity high-molecular damping material (polyurethane-based) A, B material according to the mass ratio of 5:3, pouring the mixture into the mould, carrying out heat preservation foaming for 2 minutes, opening the mould and taking out the high-molecular damping foam product. The release agent prepared by the formula has a release effect of I grade on high-viscosity polymer-based damping materials (the upper die and the lower die can be quickly separated, no foam product residue is left on the surface of the die, and the product has a flat surface, neat edges and corners and no damage). The number of release times was 21.

Example 2

Adding 1.0g of Tween60, 1.0g of Span60 and 88.0g of n-octane oil into a reactor at the temperature of 30 ℃, stirring for 10min at constant temperature, then adding 2.0g of sliced paraffin into the reactor, fully stirring for 15min (the stirring speed is 5000 r/min), raising the temperature to 65 ℃ after the system is fully dissolved and mixed, adding 8.0g of polyvinylidene fluoride powder into the reactor by 3 times, fully stirring for 30min (the rotating speed is 2000 r/min), taking out, immediately re-emulsifying for 30min by using a high-speed emulsifying machine, and thus obtaining the polymer-based damping material release agent.

Emulsion stability: after being centrifuged for 5 minutes by a centrifuge at 3000r/min, the emulsion is placed for 30 days at room temperature, and the release agent emulsion prepared by the formula is not demulsified and not delaminated.

And (3) release effect: heating the poly mould to 120 ℃, uniformly spraying a release agent on the surface of the poly mould, drying the solvent by using a spray gun, quickly and uniformly stirring the high-viscosity high-molecular damping material (polyurethane-based) A, B material according to the mass ratio of 5:3, pouring the mixture into the mould, carrying out heat preservation foaming for 3 minutes, opening the mould and taking out the high-molecular damping foam product. The release agent prepared by the formula has a release effect of I grade on high-viscosity polymer-based damping materials (the upper die and the lower die can be quickly separated, no foam product residue is left on the surface of the die, and the product has a flat surface, neat edges and corners and no damage). The number of release times was 15.

Example 3

Adding 1.0g of AEO7, 1.0g of Span80 and 88.0g of xylene into a reactor at the temperature of 30 ℃, stirring at constant temperature for 10min, then adding 1.5g of sliced paraffin into the reactor, fully stirring for 15min (the stirring speed is 5000 r/min), raising the temperature to 65 ℃ after the system is fully dissolved and mixed, adding 8.5g of polyvinylidene fluoride powder into the reactor by 3 times, fully stirring for 30min (the rotating speed is 2000 r/min), taking out, immediately re-emulsifying for 30min by using a high-speed emulsifying machine, and thus obtaining the polymer-based damping material release agent.

Emulsion stability: after being centrifuged for 5 minutes by a centrifuge at 3000r/min, the emulsion is placed for 30 days at room temperature, and the release agent emulsion prepared by the formula is not demulsified and not delaminated.

And (3) release effect: heating the mould to 110 ℃, uniformly spraying a release agent on the surface of the mould, drying the solvent by using a spray gun, rapidly and uniformly stirring and pouring a high-viscosity high-polymer damping material (epoxy resin-based) A, B material into the mould according to the mass ratio of 8:2, preserving heat for 20 minutes, opening the mould and taking out the high-polymer damping product. The release effect of the high-viscosity polymer-based damping material prepared by the formula is I level (the upper die and the lower die can be quickly separated, no foam product residue is left on the surface of the die, the surface of the product is flat, the edges and corners are neat, and the product is not damaged). The number of release times was 10.

Example 4

Adding 1.0gAE07, 1.0g of zinc stearate and 88g of No. 120 solvent oil into a reactor at the temperature of 30 ℃, stirring for 10min at constant temperature, then adding 3.0g of sliced paraffin into the reactor, fully stirring for 15min (the stirring speed is 5000 r/min), raising the temperature to 60 ℃ after the system is fully dissolved and mixed, adding 7.0g of polyvinylidene fluoride powder into the reactor for 3 times, fully stirring for 30min (the rotating speed is 2000 r/min), taking out, immediately re-emulsifying for 30min by using a high-speed emulsifying machine, and thus obtaining the polymer-based damping material release agent.

Emulsion stability: after being centrifuged for 5 minutes by a centrifuge at 3000r/min, the emulsion is placed for 30 days at room temperature, and the release agent emulsion prepared by the formula is not demulsified and not delaminated.

And (3) release effect: heating the mould to 110 ℃, uniformly spraying a release agent on the surface of the mould, blowing the solvent dry by a spray gun, quickly and uniformly stirring a high-viscosity high-molecular damping material (polyurethane-based) A, B material according to the mass ratio of 5:4, pouring the mixture into the mould, carrying out heat preservation foaming for 2 minutes, opening the mould and taking out a polyurethane foam product. The release agent prepared by the formula has a release effect of I grade on high-viscosity polymer-based damping materials (the upper die and the lower die can be quickly separated, no foam product residue is left on the surface of the die, and the product has a flat surface, neat edges and corners and no damage). The number of release times was 12.

Comparative example 1

Adding 2.0g of zinc stearate and 88g of n-octane into a reactor at the temperature of 30 ℃, stirring at a constant temperature for 10min, then heating to 60 ℃, adding 10.0g of sliced paraffin into the reactor in 3 times, fully stirring for 30min (the stirring speed is 5000 r/min), taking out, and immediately re-emulsifying for 30min by using a high-speed emulsifying machine to obtain the product.

Emulsion stability: the emulsion was centrifuged for 5 minutes and then separated; the mixture is kept stand for 2 days at room temperature, and then the layering phenomenon appears.

And (3) release effect: heating the mould to 110 ℃, uniformly spraying a release agent on the surface of the mould, drying the solvent by using a spray gun, quickly and uniformly stirring the high-viscosity high-molecular damping material (polyurethane-based) A, B material according to the mass ratio of 5:3, pouring the mixture into the mould, carrying out heat preservation foaming for 2 minutes, opening the mould and taking out the high-molecular damping foam product. The release effect of the high-viscosity polymer-based damping material prepared by the formula is II level (the upper die and the lower die can be separated, a small amount of foam product residues are left on the surface of the die, and the surface of the product is uneven in foam holes and is slightly damaged). The number of release times was 4.

The above-mentioned embodiments of the present invention are only for clearly illustrating the technical solutions and the technical contents of the present invention, and all modifications made according to the present invention are within the scope of the claims of the present invention as long as they do not depart from the scope of the technical solutions of the present invention.

TABLE 1 emulsion stability and Release Effect of different Release agent lanes

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