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Physically-foamed rubber block for filling cavity

A technology of physical foaming and physical foaming agent, which is applied in the field of heated foamed rubber blocks, and can solve problems such as environmental pollution, instability, and high activity of foaming agents

Inactive Publication Date: 2014-02-19
三友(天津)高分子技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because it is necessary to obtain a larger volume expansion ratio after being heated, a large amount of chemical foaming agent and foaming activator need to be added to the rubber block, which causes the activity of the foaming agent in the foaming rubber block to be higher and less Stable, it is easy for the rubber block to foam in advance under the ambient temperature of storage and transportation, resulting in the deformation of the rubber block, and the early consumption of the foaming agent in the rubber block, so that the rubber block cannot provide sufficient foaming ratio in normal use. To meet the role of sealing cavity
At the same time, during the foaming process when heated, a large amount of chemical foaming agent decomposes and releases smoke, which contains toxic gas components such as formaldehyde, nitric oxide, and carbon monoxide, polluting the environment

Method used

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  • Physically-foamed rubber block for filling cavity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The cavity filling physical foam rubber block consists of the following components in parts by weight:

[0033] EPDM rubber 100 parts

[0034] Thermally expandable microcapsules MSH-550 30 parts

[0035] Calcium carbonate 120 parts

[0036] Talc powder 120 parts

[0037] Naphthenic oil 20 parts

[0038] 80 parts paraffin oil

[0039] Diisononyl phthalate 60 parts

[0040] Coumarone resin 10 parts

[0041] C5 resin 10 parts

[0042] Decabromodiphenylethane 10 parts

[0043] 2 parts antimony trioxide

[0044] Zinc borate 2 parts

[0045] Aluminum hydroxide 60 parts

[0046] Zinc oxide 5 parts

[0047] 2 parts stearic acid

[0048] Accelerator DM 1.5 parts

[0049] Accelerator PZ 1 part

[0050] Accelerator TRA 0.5 part

[0051] Accelerator TMTD 3 parts

[0052] sulfur 2 parts

[0053] 0.5 parts of carbon black.

[0054] The preparation method step of embodiment 1 is as follows:

[0055] Step 1: Mixing: First add EPDM rubber into the internal mixer for 2...

Embodiment 2

[0059] The cavity filling physical foam rubber block consists of the following components in parts by weight:

[0060] 100 parts of styrene-butadiene rubber

[0061] Thermally expandable microcapsules MSH-500 20 parts

[0062] Talcum powder 90 parts

[0063] Naphthenic oil 50 parts

[0064] Diisononyl phthalate 50 parts

[0065] C5 resin 10 parts

[0066] 3 parts zinc oxide

[0067] 2 parts stearic acid

[0068] Accelerator DM 2 parts

[0069] Accelerator TMTD 2 parts

[0070] sulfur 4 parts

[0071] Carbon black 1 part.

[0072] The preparation method step of embodiment 2 is as follows:

[0073] Step 1: Mixing: Add styrene-butadiene rubber to the mixer for 2 minutes by weight, then add zinc oxide, stearic acid, and carbon black in proportion, mix for 2 minutes, and then add talcum powder, After the naphthenic oil, diisononyl phthalate, and C5 resin are mixed evenly, when the temperature of the warehouse reaches 100°C, the glue is removed.

[0074] Step 2: Start re...

Embodiment 3

[0077] The cavity filling physical foam rubber block consists of the following components in parts by weight:

[0078] Polybutadiene rubber 100 parts

[0079] Thermally expandable microcapsules M401 25 parts

[0080] Calcium carbonate 60 parts

[0081] Naphthenic oil 30 parts

[0082] 30 parts paraffin oil

[0083] Diisononyl phthalate 30 parts

[0084] 8 parts terpene resin

[0085] Aluminum hydroxide 20 parts

[0086] Zinc oxide 5 parts

[0087] 2 parts stearic acid

[0088] Accelerator M 1.5 parts

[0089] Accelerator TRA 1 part

[0090] Accelerator TMTD 1 part

[0091] sulfur 2 parts

[0092] Carbon black 2 parts.

[0093] The preparation method step of embodiment 3 is as follows:

[0094] Step 1: Mixing: Add polybutadiene rubber to the internal mixer for 2 minutes by weight, then put in zinc oxide, stearic acid, and carbon black in proportion, mix for 2 minutes, and then put in carbonic acid in proportion Calcium, naphthenic oil, paraffin oil, diisononyl pht...

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PUM

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Abstract

The invention discloses a physically-foamed rubber block for filling cavity. The foamed rubber block is prepared from the following steps: taking rubber as base material, respectively adding physical forming agent, packing, plasticizer, thickening agent, flame retardant, active agent, promoting agent, vulcanizing agent and carbon block, mixing, and shaping to obtain rubber blocks of desired size. The physically-foamed rubber block provided by the invention foams when being heated and has high foaming ratio, so that the rubber block has good effect in filling and sealing cavities; and the foamed body has good adhesion force to steel plates or galvanized sheet. In comparison with the rubber block using chemical foaming agent, the rubber block provided by the invention has long service life by adding the physical foaming agent, and has the advantage of low smoke during foaming, so that the physically-foamed rubber block has high environmental performance.

Description

technical field [0001] The invention relates to a heated foamed rubber block for filling the cavities of various components, in particular to a physical foamed rubber block for cavity filling. Background technique [0002] When the vehicle is running at high speed, the high-speed airflow will bypass the hollow of the car (such as the front pillar (A-pillar), center pillar (B-pillar), rear pillar (C-pillar), wheel arch, lower longitudinal beam, etc.) Passing through will cause the body to vibrate, which will generate strong noise and affect the comfort of driving. In order to reduce the above-mentioned noise, the above-mentioned cavity is generally filled with a foam sealing material at present to suppress vibration and absorb and isolate noise. The foam sealing material to be filled can be polyurethane foam, or before the welding process, a preformed thermal foaming composition is installed on the cavity section to be filled, or a preformed thermal foaming rubber bl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L9/06C08L9/00C08L23/16C08J9/14C08K13/02
Inventor 唐斌李士学王永明高之香李建武吴子刚李崇张卫军
Owner 三友(天津)高分子技术有限公司