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Number:
First OBSH-75
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- Chemical composition: 4,4-Dioxobis(benzenesulfonhydrazide)
- Complex carrier: EPDM
- Characteristics: Commonly used organic foaming agents for rubber; suitable for medium- and low-temperature foam-forming processes without accelerators. Decomposition occurs at 158°C, with a gas yield of 93.0–105.0 ml/g. It is easy to weigh, readily dispersible, does not fly during use, leaves no pollution, and maintains its color integrity.
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- Product Description
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Whether you need a reliable rubber blowing agent for automotive EPDM sponge seals or a clean chemical blowing agent for plastics for EVA foam midsoles, OBSH delivers consistent cell structure and full compliance with VOC regulations.
OBSH Foaming Process: From Foam bowing to High‑Quality blowing Foam
Thermal Initiation
At 140–160°C, OBSH decomposes endothermically, initiating the foam blowing process.Nucleation
Generates a large amount of gas, forming uniform bubble nuclei – this is the critical first step of foam blowing.Cell Growth
Gas continues to diffuse, cells grow uniformly, and foam blowing enters the stable expansion stage.Cell Stabilization
Upon cooling, a closed‑cell blowing foam is formed, with fine cells, no odor, and no discolorationAdvantage：
-non-blooming fast curing accelerator for rubber compounds
-non-staining accelerator for injection molding.
-effective. and stable plasticzer and process aid for most elastomers.
-process aid for NR,SBR,PDM,NBR and EVA,PVC,PE,PS .
Application：
--Automotive EPDM sponge sealing strips
OBSH enables odorless, fine‑celled EPDM sponge seals with low VOC, passing OEM requirements.--EVA sports shoe midsoles and slippers
OBSH creates lightweight, resilient EVA foam midsoles with uniform cells and no discoloration.--PVC foam boards and wallpapers
OBSH delivers clean PVC foam boards and wallpapers with smooth surface and color stability.--Wire and cable foamed insulation
OBSH provides fine closed‑cell foam for wire insulation, enhancing dielectric performance without odor.--Food‑contact grade foamed packaging
OBSH produces non‑toxic, odorless foamed packaging meeting FDA/EU food contact standards.--Yoga mats, anti‑slip mats, and toys
OBSH gives soft, non‑staining foam for yoga mats, anti‑slip mats, and toys – safe for skin contact.Foaming challenges? Contact us for samples or technical support. First Rubber is ready to help.
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