Vibration damper composition

A composition and polymer technology, applied in the direction of non-rotational vibration suppression, film/sheet adhesive, other chemical processes, etc., can solve problems such as not easy to manufacture

Inactive Publication Date: 2003-06-04
KANEKA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Lamination with adhesives is suitable for processing damping materials into sheets, but is not readily adaptable to other shapes

Method used

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  • Vibration damper composition
  • Vibration damper composition

Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0120] Preparation Example 1: Preparation of Diblock Copolymers Containing Polystyrene Blocks and Polyisobutylene Blocks

[0121] Into a 2 L reactor equipped with a stirrer were charged 589 mL of methylcyclohexane (previously dried over molecular sieves), 613 mL of n-butyl chloride (previously dried over molecular sieves) and 0.550 g of cumyl chloride. After cooling the reactor to -70°C, 0.35 ml of α-picoline (2-picoline) and 179 ml of isobutene were added. Then 9.4 ml of titanium tetrachloride was further added, whereby polymerization was started. The reaction was carried out at -70°C for 2.0 hours under constant stirring. To the reaction mixture was added 59 ml of styrene and further reacted for 60 minutes, at the end of which a large amount of methanol was added to stop the reaction. The solvent was removed from the reaction mixture and the polymer was dissolved in toluene and washed with 2 portions of water. The washed toluene solution was poured into methanol to precip...

preparation Embodiment 2

[0123] Preparation Example 2: Preparation of a tri-block copolymer containing polystyrene block-polyisobutylene block-polystyrene block

[0124] A 2 L reactor equipped with a stirrer was charged with 570 ml of methylcyclohexane (previously dried over molecular sieves), 590 ml of n-butyl chloride (previously dried over molecular sieves) and 0.400 g of dicumyl chloride. After cooling the reactor to -70°C, 0.34 ml of α-picoline (2-picoline) and 174 ml of isobutene were added. Then 10.3 ml of titanium tetrachloride was further added, whereby polymerization was started. The reaction was carried out at -70°C for 2.0 hours under constant stirring. To the reaction mixture was added 58 ml of styrene and further reacted for 60 minutes, at the end of which a large amount of methanol was added to stop the reaction. The solvent was removed from the reaction mixture and the polymer was dissolved in toluene and washed with 2 portions of water. The washed toluene solution was poured into m...

Embodiment 1～8 and comparative example 1～7

[0127] According to the formula shown in Table 1, the block copolymer (A) (SIB-1 prepared in Preparation Example 1), thermoplastic elastomer, thermoplastic resin, tackifying resin and plasticizer were kneaded together, using Labo- Plastomill (manufactured by Toyo Precision Machinery) was kneaded at 170° C. for 15 minutes to produce a rubber composition. The rubber compositions were each compression molded at 170°C to prepare sheets. Moldability is good. A 5 mm x 6 mm x 1.7 mm sample was cut from each sheet.

[0128] Measurement of Dynamic Viscoelasticity

[0129] Using two samples per group, the dynamic viscoelasticity of each composition was measured at a frequency of 0.5 Hz and a shear strain of 0.05% in accordance with JIS K-6394. As an instrument for measurement, a dynamic viscoelasticity meter DVA-200 (manufactured by ITMetric Control) can be used. Regarding the storage modulus (G'), the (G') value at 0°C can be calculated (G' 0℃ ) and (G') value at 40°C (G' 40℃ ) r...

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Abstract

The present invention has for its object to provide a damping material which, despite a high damping capacity at and around room temperature, has a small temperature dependence of rigidity at and around room temperature and a damping material having hot-melt processability and a good balance between damping capacity and temperature dependence of rigidity at and around room temperature. This invention provides a damper material composition wherein the ratio of the storage modulus (G') value at 0 DEG C to the corresponding value at 40 DEG C as found by the measurement of dynamic viscoelasticity in the shear mode, namely (G'0 DEG C / G'40 DEG C), is not greater than 15 and the loss tangent (tan delta) value as found by said measurement is not smaller than 0.4 at 0 DEG C to 40 DEG C.

Description

technical field [0001] The present invention relates to a damping material composition used as a shock absorber (viscoelastic shock absorber) capable of absorbing shock displacement and vibration of frame structure components in the field of construction, and a shock absorber and double Surface vibration dampening adhesive tape. Background technique [0002] In the field of construction, we have witnessed the development of shock absorbers incorporating effective vibration reduction mechanisms in buildings for absorbing vibrations caused by earthquakes, typhoons, etc. Vibration-damping materials used for shock absorbers are required to have high vibration-damping capabilities to absorb shock displacement of buildings and vibrations of frame structure components, while considering environmental conditions and also require rigidity to have little temperature dependence at and near room temperature. [0003] High-molecular-weight materials generally have high vibration-damping...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/04C08L53/00C08L53/02
CPCC08L53/02C08L53/00Y10T428/31692C08L23/04C08L2666/24
Inventor 矢口茂木村胜彦青山泰三
Owner KANEKA CORP
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