摘要:
The present invention provides a soft polyurethane foam obtained by foam molding a foaming stock solution containing a polyol, a polyisocyanate, a foaming agent, and a catalyst. The polyol includes a polyether polyol A having a weight average molecular weight (Mw) of 3,000 to 8,000 and 3 to 4 functional groups and a polyether polyol B having a weight average molecular weight (Mw) of 1,000 to 4,000 and 2 functional groups. The polyisocyanate includes diphenylmethane diisocyanate.
摘要:
The present invention relates to a cosmetic-supporting structure, including a reticulated porous foam and a silicone coating layer, serving as an outer frame, on an outer surface of the foam, serving as an inner frame, a method of manufacturing the same, and a cosmetic product containing the same.
摘要:
Extruded polystyrene foams are made with an added brominated styrene-butadiene polymer as a flame retardant. The blowing agent is a mixture of carbon dioxide, ethanol and water, which may also contain a C4-C5 hydrocarbon. The blowing agent mixture overcomes a tendency of the brominated styrene-butadiene to form very small cells. This allows the foam to expand fully to form good quality, low density extruded foam.
摘要:
The invention relates to a process for preparing a flame-resistant polymer-modified polyol having a solids content of 1 to 65 wt.% wherein (i) at least one polyisocyanate and (ii) an olamine are reacted in (iii) a base polyol having at least two active hydrogen containing groups of which more than 50% are primary active hydrogen containing groups and wherein the olamine has at least one phosphonic ester group attached to a tertiary nitrogen atom and contains at least two hydroxyl groups. The invention further relates to a flame-resistant polymer-modified polyol obtainable with the process of the invention, to a process for preparing optionally foamed plastics using the polymer-modified polyol of the invention, and to the use of a polymer-modified polyol for the preparation of flexible polyurethane foams.
摘要:
The present invention relates to a process for manufacturing a solid thermoset foam, comprising the following successive steps; (a) providing an expandable and thermosetting composition containing a sugar, an acid catalyst chosen from strong acids, phosphoric acid and acid mineral salts, (b) introducing the expandable and thermosetting composition into a mould or applying the expandable composition to a support made of a film having a thickness at least equal to 1 mm, (c) heating the expandable and thermosetting composition at a temperature at least equal to 140°C so as to form a block of solid thermoset foam.
摘要:
The present invention provides a composition for a soft urethane foam to prepare a soft urethane foam, comprising a polyol, and a foamed soft urethane foam using the same, wherein the polyol is any one selected from among a hydrocarbon polyol, a vegetable oil, and a vegetable-oil-derived dimer acid, or a mixture of a hydrocarbon polyol with any one selected from among a vegetable oil and a vegetable-oil-derived dimer acid. The present invention provides an impregnation material for impregnation of a cosmetic composition, which can control the polarity of the impregnation material for impregnating a hydrophilic cosmetic composition, and an impregnation-use urethane foam composition for preparing the same.
摘要:
Gegenstand der Erfindung ist ein Verfahren zum physikalischen Schäumen von Silikonkautschukkörpern mittels Flüssigsilikonkautschuk (100), wobei das Verfahren erfindungsgemäß wenigstens die folgenden Schritte aufweist: - Zugabe von Wasser (3) in den Flüssigsilikonkautschuk (100) unter Bildung einer Emulsion (101), - Zuführen der Emulsion (101) an eine Extrudereinheit (11), - Erwärmen der Emulsion (101) in der Extrudereinheit (11) bis unter eine Verdampfungstemperatur des Wassers (3) und - Einspritzen der Emulsion (101) in ein Werkzeug (12) unter a) Vulkanisation des Flüssigsilikonkautschuks (100), unter b) Erhitzung des Wassers (3) bis über eine Verdampfungstemperatur des Wassers (3) und unter c) Bildung eines formstabilen Silikonkautschukkörpers (102).
摘要:
An emulsifier-free process for the preparation of water expandable polymer beads, including: a) providing an emulsifier-free starting composition comprising styrene, b) prepolymerizing the starting composition to obtain a prepolymer composition, c) mixing an aqueous blowing agent with the prepolymer composition at an elevated temperature to obtain an inverse emulsion of water droplets in the prepolymer composition, wherein the aqueous blowing agent comprises water and a water soluble initiator dissolved in the water and the water droplets comprise spheres of a styrene polymer, wherein the water soluble initiator partly decomposes due to the elevated temperature leading to the formation of the inverse emulsion of water droplets in the prepolymer composition, d) suspending the inverse emulsion in an aqueous medium to yield an aqueous suspension of suspended droplets and e) polymerizing monomers in the droplets of the suspension obtained by step d) to obtain the water expandable polymer beads.
摘要:
Disclosed are methods and compositions for forming a flexible, open cell foams which utilize a thermosetting composition comprising one or more components capable of forming a thermoset matrix and a blowing agent comprising at least one chemical blowing agent, such as water, and at least one physical blowing agent includes at least one of HFO-1336mzz, HFO-S1438mzz (preferably E-HFO-1438mzz) and HFO-1447fz, to form a flexible foam.