CN-121976615-A - High-bearing polyurethane vibration isolation support and preparation method thereof

CN121976615ACN 121976615 ACN121976615 ACN 121976615ACN-121976615-A

Abstract

The invention provides a high-bearing polyurethane vibration isolation support and a preparation method thereof, wherein the vibration isolation support comprises an upper packaging plate, a lower packaging plate and a vibration isolation intermediate, the vibration isolation intermediate is fixed between the upper packaging plate and the lower packaging plate to form the vibration isolation support, and the preparation method comprises the following steps of S1, preparation of polyurethane A material, S2, preparation of polyurethane B material, S3, preparation of modified nano CaCO 3 , S4, preparation of steel plates, S5, preparation of the upper packaging plate and the lower packaging plate, and casting and forming of the vibration isolation support. According to the invention, modified nano CaCO 3 particles are adopted to carry out single-system enhancement modification on polyurethane materials, and simultaneously, an open-pore steel plate is selected to replace a traditional solid steel plate, so that the overall quality of the support is reduced, the bonding strength of polyurethane and a metal plate is improved, and finally, the polyurethane vibration isolation support with high bearing, light weight, fireproof, mildew-proof and other comprehensive excellent performances is prepared, so that the polyurethane vibration isolation support is economical and practical.

Inventors

WANG HONGYING
ZHANG FAMING
SU CHENGLIN
CHEN GANG
LI QIANG
CHEN XIN
WANG YINGJIE
ZHANG YAFEI
LI WENZHE

Assignees

陕西长美科技有限责任公司

Dates

Publication Date: 20260505
Application Date: 20260207

Claims (8)

1. The utility model provides a high-load polyurethane vibration isolation support which characterized in that includes: an upper package plate; A lower package plate; and the vibration isolation intermediate body is fixed between the upper packaging plate and the lower packaging plate to form a vibration isolation support.
2. The high-load polyurethane vibration isolation support according to claim 1, wherein the vibration isolation intermediate is formed by mutually adhering and fixing a plurality of steel plates and vibration isolation fillers.
3. The method for preparing the high-load polyurethane vibration isolation support according to any one of claims 1 to 2, which is characterized by comprising the following steps: s1, preparing a polyurethane material A; Weighing 170 parts by weight of the polyol, 25-29 parts by weight of chain extender, 2-6 parts by weight of catalyst, 5-8 parts by weight of flame retardant and 7-9 parts by weight of mildew inhibitor, sequentially adding the components into a reaction kettle, closing a valve, heating the reaction kettle to 85 ℃, and stirring and mixing for 1.5 hours to obtain polyurethane A material; s2, preparing a polyurethane material B; Heating polyol in a drying box to be liquefied for standby, adding 220-230 parts by weight of the polyol into a reaction kettle, heating to 80 ℃, preserving heat, vacuumizing for 3 hours, then adding 227-280 parts by weight of modified MDI, adding 90 parts by weight of modified CaCO 3 nano particles, uniformly stirring, and reacting for 3-4 hours to obtain polyurethane B material; s3, preparing modified nano CaCO 3 ; Adding nano CaCO 3 powder into absolute ethyl alcohol to prepare suspension, adding sodium hexametaphosphate solution into the suspension, carrying out ultrasonic treatment, regulating the pH value of a mixed solvent to 8-10, adding methyl methacrylate, uniformly stirring, adding a KPS initiator, carrying out constant-temperature stirring reaction, standing and cooling after the reaction is finished, collecting precipitate, and drying to obtain modified nano CaCO 3 particles; S4, preparing a steel plate; selecting a round steel plate, mechanically turning the round steel plate into a steel plate with a specific shape, and pre-treating the round steel plate for later use; S5, preparing an upper packaging plate and a lower packaging plate; Performing sand blasting treatment on the upper packaging plate and the lower packaging plate, and coating a silane coupling agent on the contact surface of the upper packaging plate and the lower packaging plate with vibration isolation filler for standby; s6, pouring and forming the vibration isolation support; The upper packaging plate, the lower packaging plate and the steel plate of the middle layer are fixed in the die through the positioning tool, after the die is pressurized and fixed, the polyurethane A material and the polyurethane B material are heated respectively, after the viscosity of each component is detected to reach the standard, the components are pressurized and mixed uniformly through the material injection machine to prepare vibration isolation filler, and then the vibration isolation filler is injected into the die for preserving heat for 12 hours, so that the polyurethane is ensured to fully react and solidify, and the preparation operation of the high-bearing polyurethane vibration reduction support is completed.
4. The method for preparing the high-bearing polyurethane vibration isolation support according to claim 3, wherein the heating temperature of the polyol in S1 and S2 in a drying box is controlled to be 80-90 ℃, and the heating time is 60min.
5. The preparation method of the high-bearing polyurethane vibration isolation support according to claim 3, wherein nano CaCO 3 powder in S3 is added into absolute ethyl alcohol to prepare suspension with the mass fraction of 5% -10%; adding sodium hexametaphosphate solution with the mass fraction of 0.5% -1% into the suspension, and adjusting the pH value of the mixed solvent to 8-10 after ultrasonic treatment for 30 min; adding 1-5% of methyl methacrylate with the mass of CaCO 3 %, uniformly stirring, adding 0.5-1% (based on the mass of the methyl methacrylate) of KPS initiator, heating the system to 60-80 ℃, preserving heat, stirring at constant temperature for 2-4 hours, standing, cooling, collecting precipitate, and drying to obtain modified nano CaCO 3 particles.
6. The method for preparing the high-bearing polyurethane vibration isolation support according to claim 3, wherein a round steel plate with the diameter of 400-410mm and the thickness of 5mm is selected as the S4, and the specific shape of the steel plate subjected to mechanical turning is specifically a round solid steel plate, an A1 type perforated steel plate, an A2 type perforated steel plate or an A3 type perforated steel plate.
7. The method for preparing the high-load polyurethane vibration isolation support according to claim 6, wherein the pretreatment is to carry out oil removal treatment on the steel plate processed into a specific shape by adopting a NaOH solution with the concentration of 5%, rust removal is carried out by adopting a HCl solution with the concentration of 10% after drying, and finally the surface is roughened by sand blasting.
8. The method for preparing the high-load polyurethane vibration isolation support according to claim 3, wherein the heating temperature of the polyurethane A material and the polyurethane B material in the step S6 is 40-80 ℃.

Description

High-bearing polyurethane vibration isolation support and preparation method thereof Technical Field The invention belongs to the technical field of vibration isolation of constructional engineering, and particularly relates to a high-bearing polyurethane vibration isolation support and a preparation method thereof. Background The rubber vibration isolation support has the problems of insufficient vertical bearing capacity, poor fatigue resistance, easy aging after long-term use and the like, and is difficult to meet the strict requirements of fields such as high-rise buildings, rail transit and the like on vibration reduction. In the existing rubber support patents, natural rubber is often modified by adding a plasticizer and an anti-aging agent, but the performance of the support is continuously attenuated along with the extension of the service time, the vibration reduction effect is gradually reduced, and the performance identity is poor in the service life. Although the vibration reduction support with polyurethane material as the core can overcome part of the defects of the natural rubber support, the traditional polyurethane support still has the problem of insufficient vertical bearing capacity. Meanwhile, the main bearing structure of the building foundation has strict requirements on the density, fire resistance and mildew resistance of the vibration isolator, and the existing materials are difficult to meet the performance indexes at the same time, so that the development of the novel high-bearing polyurethane vibration isolation support has important practical significance. Based on the above, a high-bearing polyurethane vibration isolation support and a preparation method thereof are provided. Disclosure of Invention The invention aims to solve the technical problems of the prior art, and provides a high-bearing polyurethane vibration isolation support and a preparation method thereof, so as to solve the problems in the background art. In order to solve the technical problems, the invention adopts the following technical scheme: According to the first aspect, the high-bearing polyurethane vibration isolation support comprises an upper packaging plate, a lower packaging plate and a vibration isolation intermediate body, wherein the vibration isolation intermediate body is fixed between the upper packaging plate and the lower packaging plate to form the vibration isolation support. As a further explanation of the invention, the vibration isolation intermediate is composed of a plurality of steel plates and vibration isolation fillers which are adhered and fixed with each other. In a second aspect, a method for preparing a high-load polyurethane vibration isolation support, comprising the following steps: s1, preparing a polyurethane material A; Weighing 170 parts by weight of the polyol, 25-29 parts by weight of chain extender, 2-6 parts by weight of catalyst, 5-8 parts by weight of flame retardant and 7-9 parts by weight of mildew inhibitor, sequentially adding the components into a reaction kettle, closing a valve, heating the reaction kettle to 85 ℃, and stirring and mixing for 1.5 hours to obtain polyurethane A material; s2, preparing a polyurethane material B; Heating polyol in a drying box to be liquefied for standby, adding 220-230 parts by weight of the polyol into a reaction kettle, heating to 80 ℃, preserving heat, vacuumizing for 3 hours, then adding 227-280 parts by weight of modified MDI, adding 90 parts by weight of modified CaCO 3 nano particles, uniformly stirring, and reacting for 3-4 hours to obtain polyurethane B material; s3, preparing modified nano CaCO 3; Adding nano CaCO 3 powder into absolute ethyl alcohol to prepare suspension, adding sodium hexametaphosphate solution into the suspension, carrying out ultrasonic treatment, regulating the pH value of a mixed solvent to 8-10, adding methyl methacrylate, uniformly stirring, adding a KPS initiator, carrying out constant-temperature stirring reaction, standing and cooling after the reaction is finished, collecting precipitate, and drying to obtain modified nano CaCO 3 particles; S4, preparing a steel plate; selecting a round steel plate, mechanically turning the round steel plate into a steel plate with a specific shape, and pre-treating the round steel plate for later use; S5, preparing an upper packaging plate and a lower packaging plate; Performing sand blasting treatment on the upper packaging plate and the lower packaging plate, and coating a silane coupling agent on the contact surface of the upper packaging plate and the lower packaging plate with vibration isolation filler for standby; s6, pouring and forming the vibration isolation support; The upper packaging plate, the lower packaging plate and the steel plate of the middle layer are fixed in the die through the positioning tool, after the die is pressurized and fixed, the polyurethane A material and the polyurethane B material are heated respectively, after the vis