摘要:
Various uses of fluorinated olefin having an MRI value of less than ethane, in combination with one or more other components, including other fluoroalkenes, hydrocarbons; hydrofluorocarbons (HFCs), ethers, alcohols, aldehydes, ketones, methyl formate, formic acid, water, trans-1,2-dichloroethylene, carbon dioxide and combinations of any two or more of these, in a variety of applications, including as blowing agents, are disclosed.
摘要:
The present disclosure provides advantageous graphene/graphite stabilized composites (e.g., graphene/graphite stabilized emulsion-templated foam composites), and improved methods for fabricating such graphene/graphite stabilized composites. More particularly, the present disclosure provides improved methods for fabricating pristine, graphene/graphite/polymer composite foams derived from emulsions stabilized by graphene/graphite kinetic trapping. In exemplary embodiments, the present disclosure provides that, instead of viewing the insolubility of pristine graphene/graphite as an obstacle to be overcome, it is utilized as a means to create or fabricate water/oil emulsions, with graphene/graphite stabilizing the spheres formed. These emulsions are then the frameworks used to make foam composites that have shown bulk conductivities up to about 2 S/m, as well as compressive moduli up to about 100 MPa and breaking strengths of over 1200 psi, with densities as low as about 0.25 g/cm3.
摘要翻译:本公开提供了有利的石墨烯/石墨的复合材料稳定化的(例如,石墨烯/石墨稳定的乳液模板化泡沫复合材料),和改进的用于制造石墨烯的搜索方法/石墨复合材料的稳定化。 更具体地,本公开提供了用于制造由石墨烯/石墨的动力学捕获稳定的乳液衍生的原始,石墨烯/石墨/聚合物复合泡沫体的改进方法。 在示例性的实施方案中,本发明提供了,而不是观看原始石墨烯/石墨作为障碍物的不溶性被克服,它被用来作为一种手段来创建或制造水/油乳剂,与石墨烯/石墨稳定球体FORMED , 这些乳液然后用于制备泡沫复合材料thathave所示散装电导率高达约2 S /米,以及压缩模量高达约100兆帕,超过1200磅的断裂强度的框架,其密度低至约0.25克 /立方厘米。
摘要:
Provided is a method for recycling a styrenic resin extruded foam. The method includes extrusion-foaming a styrenic resin containing 1 to 75% by weight of a recycled styrenic resin that has been reduced in volume by thermal shrinking and/or thermal melting of a styrenic resin foam and a foaming agent to yield a styrenic resin extruded foam. The styrenic resin extruded foam contains an aliphatic bromine-containing polymer as a flame retardant and further contains an epoxy compound (a) in an amount of 4 to 20 parts by weight, a polyhydric alcohol partial ester (b) in an amount of 0 to 20 parts by weight, a phenolic stabilizer (c) in an amount of 4 to 20 parts by weight, and a phosphite stabilizer (d) in an amount of 0 to 0.9 parts by weight, relative to 100 parts by weight of the flame retardant, as stabilizers.
摘要:
Rigid polyurethane foam is made in a vacuum assisted process using a blowing agent mixture that includes water and a hydrofluoroolefin and/or hydrofluorochloroolefin. In preferred embodiments, the blowing agent mixture further includes a hydrocarbon such as cyclopentane.
摘要:
There is provided polyvinylidene fluoride resin expanded beads which have a high expansion ratio, do not shrink easily, and are capable of obtaining a molded article of the expanded beads that is excellent in mold reproducibility and dimensional stability. The polyvinylidene fluoride resin expanded beads include a polyvinylidene fluoride resin as a base resin, in which a flexural modulus of the polyvinylidene fluoride resin is 450 MPa or more, a melt flow rate (MFR) of the polyvinylidene fluoride resin is 1 g/10 min or more at 230°C and 2.16 kg load, an apparent density of the expanded beads is 25 to 150 g/L, and a closed cell content of the expanded beads is 80% or more.
摘要:
Ein Verfahren zur Herstellung von Schaumstoffplatten mit einer Dichte im Bereich von 20 bis 45 kg/m 3 , umfassend die Stufen: a. Erzeugen einer Polymerschmelze aus einem Styrolpolymeren oder Mischungen von Styrolpolymeren, b. Einbringen von 0 bis 5 Gew.-%, bezogen auf die Polymerschmelze, eines IR-Absorbers und 0 bis 10 Gew.-%, bezogen auf die Polymerschmelze, einer bromierten, organischen Verbindung als Flammschutzmittel, sowie gegebenenfalls weiteren Zusatzstoffen, wie Nukleierungsmittel oder Weichmacher, c. Einbringen von 1 bis 12 Gewichtsanteilen pro 100 Gewichtteile der in Stufe (a) und (b) erzeugten Polymerschmelze einer Treibmittelmischung, welche aus 5 bis 70 Gew.-% eines oder mehrerer Hydrofluorolefine und 95 bis 30 Gew.-% eines oder mehrerer Cotreibmittel besteht, zur Ausbildung einer schäumbaren Schmelze, d. Extrusion der schäumbaren Schmelze in einen Bereich niedrigeren Drucks unter Aufschäumen zu dem Extrusionsschaumstoff.
摘要:
The present invention aims to provide a foamable resin composition which enables foam molding at high expansion ratios and reduction of open cells. The present invention also aims to provide a foam molded body produced from the foamable resin composition. The present invention is a foamable resin composition including a thermoplastic resin, thermal expansion microcapsules, and a chemical foaming agent, wherein Ts is not lower than 120°C, Tmax is not lower than 190°C, and Ts - Tc is not lower than -30°C and not higher than 6°C, where Ts denotes a foaming starting temperature of the thermal expansion microcapsules, Tmax denotes a maximum foaming temperature of the thermal expansion microcapsules, and Tc denotes a decomposition temperature of the chemical foaming agent.