Silicone surfactants for HR molded foams

Silicone surfactants for HR molded foams by G. Burkhart Download PDF EPUB FB2

Silicone surfactants for HR molded foam. 8 Product Features and benefits VORASURF™ DC Additive Surfactant for polyester flexible slabstock foam applications with low emission requirements • Can be used in flexible molded foam for cell opening, and for rigid foam applications.

The VORASURF™ family of silicone surfactants in flexible molded foam additive applications improve flexible polyurethane foam processing, performance, & quality. Markets Products Support.

Products In Catalog; Technical Content; View All Products and Content VORASURF™ HR Additive. Niax* Silicone Surfactants for HR Molded Foam. Product Properties; Product Description; Product Properties.

Niax Silicone: HR TDI: TDI / MDI: HR MT: HR MDI: L High rebound molding sponge, Flexible molded high resilient foam, Moulded foam and HR slabstock foam. SilibasePU Partial opening for MDI system, Low activity, Low atomization.

Polyether Polyol: H2O: High rebound molding sponge, Flexible molded high resilient foam, Moulded foam and HR slabstock foam. Surfactants orient themselves in the interfacial region between the two phases. During the formation of PU foam it is believed that the silicone surfactant functions at four discrete phases: dispersion of reactants, Silicone surfactants for HR molded foams book, stabilization, and cell opening in flexible PU foams (Figure ).

Siltech offers a range of SILSTAB ® silicone surfactants for use in formulating high resilience (HR) moulded flexible foams. These products offer the producers: • a variety of stabilizing and. Silicone Surfactants For High Resilience Foam: Niax Silicone: Product Description: L Universal HR silicone, can give easy-to-crush foam.

L Low VOC HR silicone, can provide excellent processing stability and foam permeability. L HR silicone for PHD and SAN systems. L Wide processing HR silicone, can give easy-tocrush.

• An extensive toolbox of proven Dow silicone surfactants for flexible, rigid and microcellular polyurethane foam •y of global resources, game-changing science and technical know-how Arra • An exceptional range of value-added polyurethane systems, components and additives. high-density molded foam; also can be used for high- density rigid molded foam 1, 0 Soluble X X Dow Corning® Additive General-purpose surfactant for TDI HR molded foam and TM systems 27 Insoluble X Dow Corning® Additive Surfactant for appliance and insulation panels, including pour-in-place applications 54 We offer high foaming surfactants for dyeing and polymer foams with good electrolyte compatibility.

Product listing. REWOPOL® B REWOPOL® B is used as wetting agent and emulsifier for polymer or particle containing dispersions. TEGO® Addibit L N. Surfactants with higher silicone content will provide lower surface tension and thus help increase the number of air bubbles introduced during mixing.

These air bubbles serve as the starting point for foam cell growth. As a result, the cured polyurethane foam made with higher silicone content surfactant has a smaller bubble size.

Five novel silicone surfactants that boast enhanced performance with flexible and molded PUR foams are available from Dow Coming Corp., Midland, Mich. These new non-hydrolyzable silicone surfactants are said to be based on proven technology that. VORASURF™ DC Additive is a general-purpose silicone surfactant.

Used for production of flexible HR molded foam and TDI-based HR molded foam. Sound consists of pressure waves in air in the frequency range 50 Hz to 10 kHz. Metal open-cell foams, based on Polyurethane (PU) foams, are used for heat exchangers.

Airflow measurements are also used to characterize the open-cell content of foams. Silicone surfactants control face opening in PU foams, affecting the air-flow values.

A method for making a rigid polyurethane foam by reacting a polyisocyanate and a polyol in the presence of a urethane catalyst, a blowing agent and a silicone surfactant characterized by employing as a blowing agent a C1-C4 HFC or HCFC, preferably HFCfa, and as the silicone surfactant a polyether-polysiloxane copolymer having a total surfactant molecular weight of 12, to.

Dow's silicone additives and surfactants enable improved foam properties by bringing a range of flexibility and rigidness to foam and complement Univar Solutions existing elastomers product line. Stabilizers for Polyurethane Foams At this year's UTECH Asia, BYK-Chemie will show a new additive line for the production of polyurethane foams.

The stabilizers called SILBYK ® are silicone surfactants for these application areas: PUR Slabstock Foam; PUR Rigid Foam; PUR Molded Foam; PUR Microcellular Foam. X1 is a silicone surfactant which is a prior art material according to U.S. Pat. 4, having the formula Me 3 Si(OSiMe 2) x (OSiMeG) y OSiMe 3.

wherein G denotes --CH 2 CH 2 CH 2 (OCH(CH 3)CH 2) 2 OCH 3 which surfactant is typically used in making HR flexible molded foams. In the Examples below, the silicone surfactants of Table 1 B. HR molded foam, High efficiency surfactant: L, B UNITIVE S Flexible molded foam and slab stock foam: DC, L, B UNITIVE S Low fogging flexible molded foam with TDI: DC UNITIVE S Standard flexible molded foam with TDI: DC UNITIVE S Low emission, Polyester Slab-stock: DC UNITIVE KE Cell.

Without silicone surfactant With silicone surfactant Cream time [s] 57 60~62 Gel time [s] ~ Tack-free time [s] ~ Figure 1. Densities (a) and density distributions (b) of the RPUFs vs.

surfactant concentration Figure 2. Surface tensions of the RPUFs vs. surfactant concentration. Hand mix flexible molded foam parts were prepared by pouring the reactive mixture into a heated aluminum mold at 70 °C.

The mold had internal dimensions of 12 in x 12 in x 4 in. Solvent based release. During the session on slabstock foam on ApDr. Gabriel Kiss will present “New Developments in Silicone Surfactants for High Resilience Slabstock Foams.”. Forty-three experimental silicone surfactants were evaluated in five different foam formulations.

New EP-K,and products reportedly proved superior to competitive surfactants and to existing Goldschmidt products in processing latitude, flowability, bulk stability, and fogging/VOCs.