摘要:
This invention relates to rigid isocyanate-based polymer foam and composites thereof comprising a carbon black component comprising at least 50 weight percent of a fluorinated carbon black. Said foam having improved thermal properties, specifically, rigid polyurethane and/or polyisocyanurate foams for use in said insulation applications.
摘要:
The present invention is to a process of producing a molded rigid polyurethane foam for application in appliance, having a reduced thermal conductivity at densities between 33 and 38 kg/m 3 . The molded rigid polyurethane foam have a ratio of applied foam density (kg/m 3 ) to lambda (mW/mK), measured at 10°C, 24 hours after foam production from 1.65 and to 2.15 and are obtained by the process of injecting into a closed mold cavity under reduced pressure a reaction mixture at a packing factor of 1.1 to 1.9 and the reaction mixture comprises: A) an organic polyisocyanate; B) a physical blowing agent; C) a polyol composition containing at least one polyol with a functionality of 3 or greater and a hydroxyl number between 200 and 800 and a water content of 0 to 2.5 weight percent of the total polyol composition; D) catalyst; and E) auxiliary substances and/or additives.
摘要翻译:本发明涉及一种生产应用于器具的模塑硬质聚氨酯泡沫的方法,其密度在33和38kg / m 3之间时具有降低的热导率。 模制的硬质聚氨酯泡沫体在泡沫产生后24小时在10℃下测量的泡沫体密度(kg / m 3)与λ(mW / mK)的比值为1.65至2.15,并通过注入 在减压下在封闭系数为1.1至1.9的反应混合物中封闭模腔,并且反应混合物包含:A)有机多异氰酸酯; B)物理发泡剂; C)多元醇组合物,其包含至少一种官能度为3或更大且羟值为200至800且多元醇组合物的总含水量为0至2.5重量%的多元醇; D)催化剂; 和E)辅助物质和/或添加剂。
摘要:
A storage stable isocyanate-reactive composition has ethylene oxide content from 1 wt% to 50 wt%, based on the total weight of an isocyanate-reactive component that includes a polyol component, a catalyst component, and a blowing agent component. The polyol component includes at least one polyol, the catalyst component includes at least one amine catalyst, and the blowing agent component includes at least one hydrohaloolefin based blowing agent. The isocyanate-reactive component is storable at least at one of room temperature and a higher temperature for a period of at least 1 day with a less than 10 second change in gel time when reacted with an isocyanate component at an isocyanate index from 100 to 150, compared to when the same isocyanate-reactive component is stored for a period of less than 1 day at room temperature and reacted with the same isocyanate component at the same isocyanate index from 100 to 150.
摘要:
This invention relates to rigid isocyanate-based polymer foam and composites thereof comprising a carbon black component comprising at least 50 weight percent of a fluorinated carbon black. Said foam having improved thermal properties, specifically, rigid polyurethane and/or polyisocyanurate foams for use in said insulation applications.
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:
A method of making a molded rigid polyurethane foam comprising injecting into a closed mold cavity a reaction mixture at a packing factor of 1.03 to 1.9, wherein the mold cavity is under a pressure of from 300 to 950 mbar, wherein the reaction mixture comprises an organic polyisocyanate,a polyol composition, a catalyst, optionally auxiliary substances and/or additives, and a chemical blowing agent component in an amount of from 1 to 5 weight percent based on the total weight of the components excluding polyisocyanate, the chemical blowing agent component comprising at least one chemical blowing agent, wherein the chemical blowing agent component is the sole blowing agent.