For OCF formulations, silicone stabilizers built upon silicon‑carbon chemical bonds that resist hydrolysis should be adopted. Traditional Si‑O‑C type silicone surfactants for rigid foams are susceptible to hydrolysis. If incorporated, they will lose functionality during long‑term storage inside aerosol cans, which in turn causes poor foaming performance.
Silicone‑based foam stabilizers plays a key role in the OCF system:
- 1.They emulsify the mixture of prepolymer and DME / propane‑butane propellants, delivering compatible system stability and satisfying shelf‑life requirements inside sealed cans.
- 2.They produce fine, evenly distributed cell structures while minimizing subsurface voids, large cavities and coarse foam cells.
- 3.They adjust the balance between open‑cell and closed‑cell fractions. This prevents common defects including post‑foaming shrinkage, foam collapse and insufficient resilience.
- 4.They improve foam flow characteristics and expansion ratio, boosting product performance for on‑site application under low‑temperature winter conditions.
- 5.They strengthen adhesion between foam and substrates and reduce gaps formed at material interfaces.
Most OCF on the market formulations primarily use open-cell silicone stabilizer, with a small amount of closed-cell type compounded in to balance hardness and shrinkage.
XH-1880is a well‑established and stable open‑cell silicone stabilizer with these key application features:
- 1.Compatible with propane‑butane blended propellant systems
- 2.Outstanding emulsifying capacity
- 3.Creates fine and uniform foam cell morphology
- 4.Powerful foam stabilization effect to lower void formation
- 5.Delivers high open‑cell content and reliable dimensional stability
Storage Guidelines & Safety Notes
Keep materials sealed and stored in cool environments. Protect from water ingress. Strictly control moisture levels of all raw feedstocks. Do not mix this product with conventional hydrolyzable rigid‑foam stabilizers when manufacturing OCF.
Typical end‑uses for OCF include filling, sealing, bonding and fixing door‑window frames, masonry works. It is also applied for sealing cable boxes, electrical enclosures, air‑conditioning ducts, chilled and hot‑water insulated pipes, tile adhesion, general household repairs, as well as bonding exterior thermal‑insulation boards.
Privacy settings