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KR-102961031-B1 - Vibration-Damping Rubber and Composition Thereof

KR102961031B1KR 102961031 B1KR102961031 B1KR 102961031B1KR-102961031-B1

Abstract

The present invention relates to anti-vibration rubber and its composition, and more specifically, to anti-vibration rubber and its composition having excellent vibration damping ability to reduce noise and vibration generated in home appliances, which are used in compressors of home appliances. The above vibration-damping rubber is a vibration-damping rubber comprising halogenated butyl rubber and hydrogenated petroleum resin, wherein the vibration-damping rubber is a vibration-damping rubber in which, in a temperature dispersion measurement of dynamic viscoelasticity at a frequency of 10 Hz, the temperature at which the loss factor is maximum is between -15°C and 5°C, the maximum loss factor in the said temperature range is 1.2 to 1.5, and the loss factor at 40°C is less than 0.5, and as a rubber composition for manufacturing the above vibration-damping rubber, the composition comprises 20 to 40 parts by weight of hydrogenated petroleum resin per 100 parts by weight of halogenated butyl rubber, one or more vulcanizing agents selected from sulfur (free sulfur), amine disulfide, polymeric polysulfide, and sulfur olefin adducts, 3 to 10 parts by weight of zinc oxide and stearic acid per 100 parts by weight of halogenated butyl rubber as activators, and as a vulcanization accelerator The present invention is characterized by comprising a benzothiazole-based accelerator and a thiuram-based accelerator, and comprising carbon black and inorganic particles as fillers, and comprising one or more amine-based anti-aging agents selected from the group consisting of N-isopropyl-N'-phenyl-p-phenylenediamine and N-1,3-dimethylbutyl-N'-phenyl-p-phenylenediamine and 2,2,4-trimethyl-1,2-dihydroquinoline as anti-aging agents, and comprising a rubber product manufactured from the present invention.

Inventors

  • 한승우
  • 이명하
  • 이영석
  • 정우정

Assignees

  • (주)진양오일씰

Dates

Publication Date
20260511
Application Date
20250613

Claims (13)

  1. A rubber composition for manufacturing a vibration-damping rubber having a temperature at which the loss factor is maximum in a temperature dispersion measurement of dynamic viscoelasticity at a frequency of 10 Hz, wherein the temperature at which the loss factor is maximum is between -15°C and 5°C, and the maximum loss factor in the said temperature range is 1.2 to 1.5, comprising 20 to 40 parts by weight of hydrogenated petroleum resin per 100 parts by weight of butyl halogenated rubber, and further comprising a vulcanizing agent, an activator, a vulcanization accelerator, a filler, and an anti-aging agent. The glass transition temperature (Tg) of the above hydrogenated petroleum resin is 66℃, and The above-mentioned anti-aging agents are N-isopropyl-N'-phenyl-p-phenylenediamine and 2,2,4-trimethyl-1,2-dihydroquinoline (2,2,4-trimethyl-1,2-dihydroquinoline) is included in a weight ratio of 1:1.5, and A vibration-damping rubber composition comprising 1 to 4 parts by weight of the above anti-aging agent per 100 parts by weight of butyl halogenated rubber.
  2. In Article 1, The above halogenated butyl rubber includes butyl chloride, and The above vulcanizing agent comprises 0.5 to 3 parts by weight per 100 parts by weight of halogenated butyl rubber, wherein one or more vulcanizing agents selected from sulfur (free sulfur), amine disulfide, polymeric polysulfide, and sulfur olefin adducts are included. A vibration-damping rubber composition characterized by containing 3 to 10 parts by weight of zinc oxide and stearic acid as the above-mentioned activators per 100 parts by weight of butyl halogenated rubber.
  3. In Article 2, A vibration-damping rubber composition characterized by a weight ratio of zinc oxide and stearic acid, which are activators, of 4 to 6:1.
  4. In Article 1, A vibration-damping rubber composition characterized by including benzothiazole-based accelerators and thiuram-based accelerators as vulcanization accelerators, and carbon black and inorganic particles as fillers.
  5. In Article 4, A vibration-damping rubber composition characterized by including amorphous silica surface-modified with silane as the inorganic particle, wherein the silane is either vinylsilane or aminosilane.
  6. In Article 4, A vibration-damping rubber composition characterized by the content ratio of the above-mentioned benzothiazole-based accelerator and thiuram-based accelerator being 1:0.6 to 1 by weight.
  7. In Article 6, The above benzothiazole-based promoter is one or more selected from 2-mercaptobenzothiazole, sodium-2-mercaptobenzothiazole, zinc salt 2-mercaptobenzothiazole, cyclohexylamine salt 2-mercaptobenzothiazole, N-tertbutyl-2-benzothiazole sulfenamide, and N-oxydiethylene-2-benzothiazole sulfenamide, and The above thiuram-based accelerator is one or more selected from tetramethyl thiuram monosulfide, tetraethyl thiuram disulfide, tetrabutyl thiuram disulfide and dipentamethylene thiuram disulfide, forming a vibration-damping rubber composition.
  8. A vibration-damping rubber product characterized by being manufactured from a vibration-damping rubber composition selected from any one of claims 1 to 7.
  9. In Paragraph 8, The above anti-vibration rubber product has a hardness (Shore A) of 40 to 70 as measured according to KS M 6518, a tensile strength of 80 to 120 kgf/㎠, and an elongation of 450 to 600%.
  10. In Paragraph 8, Anti-vibration rubber product having a hardness change (Shore A) of +5 or less, a tensile strength change rate of -10% or less, and an elongation change rate of -20% or less after an aging test (100℃, 72 hours).
  11. A vibration-damping rubber pad characterized by being manufactured from a vibration-damping rubber composition selected from any one of claims 1 to 7.
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Description

Vibration-Damping Rubber and Composition Thereof The present invention relates to anti-vibration rubber and its composition, and more specifically, to anti-vibration rubber and its composition having excellent vibration damping ability to reduce noise and vibration generated in home appliances, which are used in compressors of home appliances. Generally, home appliances such as air conditioners, refrigerators, and dryers that use refrigerants include a compressor. The compressor compresses the refrigerant in a gaseous state that has absorbed heat, and the compressed refrigerant is converted into a liquid state. During the process of the liquid refrigerant vaporizing, heat is absorbed and released to the outside, and this process is repeated. In particular, a lot of noise and vibration are generated during the process of compressing the refrigerant, and in order to reduce noise and vibration, it is required to improve the noise and vibration damping function of the rubber parts mounted on the compressor and the mating part (support part). As prior art, Published Patent Application No. 10-2020-0062457 describes a vibration-damping rubber composition comprising raw rubber including natural rubber and optional butadiene rubber, an inorganic filler including boron nitride, an organic filler including carbon black, an activator, a sulfur-containing compound, and an anti-aging agent. Registered Patent Publication No. 10-1846707 describes a vibration-damping rubber composition comprising natural rubber and butadiene rubber as raw rubbers, and comprising carbon black, carbon nanotubes, an anti-aging agent, an activator, and a crosslinking agent. Japanese Patent Publication No. 2005-179525 describes a rubber composition for vibration damping that comprises a polymer (A) having a glass transition temperature in the range of -80 to 0°C and a solubility parameter in the range of 7.5 to 8.5, a polymer (B) having a glass transition temperature in the range of 10 to 60°C and a solubility parameter of 8.5 or higher, and a polymer (C) having a melting point in the range of 50 to 160°C and a solubility parameter of 8.5 or higher. However, there is a continuing demand for rubber products for vibration damping that have a further improved function of absorbing noise and vibration. Figure 1 is a graph showing the loss coefficient of the anti-vibration rubber according to the present invention. Embodiments of the present invention will be described in detail below. However, this is merely illustrative and the present disclosure is not limited to the specific embodiments described illustratively. The terms used in this disclosure have been selected to be as widely used as possible, taking into account the function of this disclosure; however, these may vary depending on the intent of those skilled in the art, case law, the emergence of new technologies, etc. Unless otherwise defined, technical and scientific terms used may have the meaning commonly understood by those skilled in the art to which this disclosure pertains. In the present disclosure and claims, terms such as “comprising” or “having” mean that the features or components described in the specification are present, and unless specifically limited, do not exclude the possibility that one or more other features or components may be added. Singular expressions used in the present disclosure and claims include plural expressions unless the context clearly specifies them to be singular. Additionally, plural expressions include singular expressions unless the context clearly specifies them to be plural. Additionally, the numerical ranges used in this disclosure include lower and upper limits and all values within the range, increments logically derived from the form and width of the defined range, all of the specified values, and all possible combinations of upper and lower limits of the numerical range defined in different forms. Unless otherwise specifically defined in this disclosure, values outside the numerical range that may occur due to experimental error or rounding of values are also included in the defined numerical range. In addition, unless otherwise specifically designated, all content-related figures refer to weight ratios. The present invention is described below. A vibration-damping rubber of one embodiment of the present invention comprises a butyl rubber halogenated and a hydrogenated petroleum resin, wherein the vibration-damping rubber comprises a temperature at which the loss factor is maximum in a temperature dispersion measurement of dynamic viscoelasticity at a frequency of 10 Hz, a temperature of -15°C or higher and 5°C or lower, a maximum loss factor of 1.2 to 1.5 in the said temperature range, and a loss factor of less than 0.5 at 40°C. From the perspective of vibration damping performance, a higher loss factor is preferable. Here, "loss factor (tanδ)" is one of the evaluation indicators for the vibration isolation characteristics of a vibration iso