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Sound insulating material and sealing material

A technology of sound insulation and rubber composition, which is applied in the direction of sealing devices, household seals, film/sheet adhesives, etc., and can solve problems such as corrosion of sound insulation objects, and achieve the effects of inhibiting corrosion, improving sound insulation, and reducing corrosion

Inactive Publication Date: 2014-05-28
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when EPDM is cross-linked with sulfur, depending on the type of sound-insulating object, the sulfur remaining in the EPDM foam may corrode the sound-insulating object.

Method used

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  • Sound insulating material and sealing material
  • Sound insulating material and sealing material
  • Sound insulating material and sealing material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～10 and comparative example 1～4

[0134] (1) Manufacture of sound insulation materials

[0135] According to the compounding amount recorded in the compounding recipe shown in Table 1, polymers, processing aids, pigments, flame retardants, fillers and softeners were compounded and kneaded with a 3L pressurized kneader to prepare a primary mixture.

[0136] Separately mix crosslinking agent, crosslinking auxiliary agent, foaming agent and foaming auxiliary agent (in the case of comparative examples 1, 3 and 4, also mix vulcanization retarder), mix the resultant in the primary mixture, and use 10 inches of mixing Roll kneading to prepare a rubber composition (secondary mixture) (kneading process).

[0137] Next, the rubber composition was extruded into a sheet with a thickness of about 8 mm using a single-screw extrusion molding machine (45 mmφ) to produce a rubber composition sheet (forming step).

[0138] Next, the rubber composition sheet was preheated at 140° C. for 20 minutes in a hot air circulation oven....

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Abstract

This sound insulating material can be obtained by means of foaming a rubber composition containing an ethylene-propylene-diene rubber. The sulfur atom content calculated by means of fluorescence x-ray measurement is no greater than 1000 ppm by mass. The 50% compression load value is 0.1-10 N / cm<2> inclusive. The air permeability is no greater than 10 cm<3> / minute / cm<2>.

Description

technical field [0001] The present invention relates to a sound insulating material and a sealing material. Specifically, it relates to a sound insulating material and a sealing material including the sound insulating material. Background technique [0002] Conventionally, EPDM foams obtained by foaming ethylene-propylene-diene rubber (hereinafter sometimes abbreviated as EPDM) are known as sound insulating materials for various industrial products. [0003] The EPDM foam is generally produced by foaming EPDM with a foaming agent and crosslinking it with sulfur. However, when EPDM is cross-linked with sulfur, depending on the type of sound-insulating object, the sound-insulating object may be corroded due to sulfur remaining in the EPDM foam. [0004] Therefore, in order to reduce corrosion, for example, an EPDM foam has been proposed that contains EPDM, a quinone-based crosslinking agent, an organic peroxide-based crosslinking agent, and crosslinking aids such as thiazoles...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/04B32B5/18B32B27/00C08K5/14C08K5/33C08L23/16C08L71/02C09K3/10G10K11/16G10K11/162C09J7/26
CPCC08J9/04C09K3/10G10K11/162C08J9/0028C08J2201/026C08J2323/16C09K2200/0642B32B7/12B32B25/08B32B25/16B32B2250/02B32B2250/24B32B2266/0207B32B2307/102B32B2307/54B32B2307/724B32B2581/00C09J7/26C08L23/16C08F36/04
Inventor 岩濑崇行平井文太
Owner NITTO DENKO CORP