摘要:
The present invention relates to the technical field of rigid polyurethane foams, and particularly to a rigid polyurethane foam prepared from the following raw materials in parts by weight through mixing and reaction: 135-165 parts of polyisocyanate, 100 parts of polyol composition, 10-16 parts of C-pentane, 1.8-2.3 parts of catalyst, 1.8-2.5 parts of silicone oil, 1.6-2.4 parts of water, and 1-chloro-3,3,3-trifluoropropene accounting for 1%-3% of the total weight of the raw materials. The present invention also relates to a preparation method of the rigid polyurethane foam and applications of the rigid polyurethane foam in the industries of refrigerators and ice lockers. The rigid polyurethane foam according to the present invention has smaller, finer and more uniform cells, so that the thermal conductivity (which can be as low as 0.01800 W/m.K or below) is greatly reduced and the strength of the foam is increased; in addition, the rigid polyurethane foam lowers energy consumption and is good in environmental friendliness; the rigid polyurethane foam according to the present invention has a positive role in promoting upgrading and updating of the existing C-pentane foaming technologies for refrigerators.
摘要翻译:本发明涉及硬质聚氨酯泡沫的技术领域,尤其涉及通过混合和反应从以重量份以下的原料制得的硬质聚氨酯泡沫体:135-165份多异氰酸酯,100份多元醇组合物,10- 16份C-戊烷,1.8-2.3份催化剂的,1.8-2.5份硅油,1.6-2.4份的水,和1-氯-3,3,3-三氟丙烯占1%-3的% 原料的总重量。 因此,本发明涉及硬质聚氨酯泡沫和在冰箱和冰储物柜的工业硬质聚氨酯泡沫塑料的应用中的一个制备方法。 硬质聚氨酯泡沫雅丁到本发明具有更小的,更精细和更均匀的细胞,所以没有热传导性(其可以是低至0.01800 W /米·K或以下)大大降低,泡沫的强度增加; 另外,硬质聚氨酯泡沫降低能量消耗,并且在环境友好好; 硬质聚氨酯泡沫gemäß到本发明具有在电视节目预告廷升级和现有的C-戊烷发泡技术冰箱的更新了积极作用。
摘要:
Disclosed is a combination of hydrofluoroolefins and/or hydrochlorofluoroolefins with stabilizers wherein the stabilizers minimize the degradation of the hydrofluoroolefins and hydrochlorofluoroolefins during storage, handling and use yet allow for atmospheric degradation. The combinations exhibit low or zero ozone depletion potential and lower global warming potential making them of interest as replacements for chlorofluorocarbons and hydrfluorocarbons. The combinations of the present invention comprise hydrofluoroolefins and/or hydrochlorofluoroolefins in combination with a stabilizer or stabilizers selected from free radical scavengers, acid scavengers, oxygen scavengers, polymerization inhibitors and combinations thereof.
摘要:
There is disclosed a phenol resin foam which contains a phenol resin and a foaming agent comprising at least one of a chlorinated hydrofluoroolefin and a non-chlorinated hydrofluoroolefin. With respect to the phenol resin foam, its density is 10 kg/m 3 or more and 150 kg/m 3 or less, its thermal conductivity under a 10°C environment is 0.0175 W/m·k or less, and its thermal conductivity under a 23°C environment is 0.0185 W/m·k or less.
摘要翻译:公开了含有酚醛树脂的酚醛树脂泡沫体和包含氯化氢氟烯烃或非氯化氢氟烯烃中的至少一种的发泡剂。 相对于酚醛树脂发泡体,密度为10kg / m 3以上且150kg / m 3以下,在10℃环境下的导热率为0.0175W / m·k以下,导热率 在23℃环境下为0.0185W / m·k以下。
摘要:
Process for preparing rigid polyurethane or urethane-modified polyisocyanurate foams from polyisocyanates and polyfunctional isocyanate-reactive compounds in the presence of blowing agents wherein the polyfunctional isocyanate-reactive compounds comprise a polyether polyol having a hydroxyl number of between 50 and 650 mg KOH/g obtained by reacting a polyfunctional initiator first with ethylene oxide and subsequently with propylene oxide wherein the propoxylation degree is between 0.33 and 2 mole propylene oxide per active hydrogen atom in the initiator and wherein the molar ratio of ethylene oxide to propylene oxide in said polyether polyol is at least 2.
摘要:
There is disclosed a phenol resin foam comprising a phenol resin, a hydrocarbon having 6 or less carbon atoms, and at least one halogenated hydroolefin selected from the group consisting of hydrofluoroolefins and hydrochlorofluoroolefins, and the phenol resin foam having the density of 10 kg/m 3 or more and 150 kg/m 3 or less, wherein the sum of the content of the hydrocarbon having 6 or less carbon atoms and the content of the hydrogenated hydroolefin is from 0.23 to 0.90 mol, the content of the hydrocarbon having 6 or less carbon atoms is from 0.03 to 0.85 mol, and the content of the halogenated hydroolefin is from 0.05 to 0.85 mol, per 22.4 × 10 -3 m 3 of spatial volume in the phenol resin foam.
摘要:
Catalyst compositions useful in the production of insulating polyurethane or polyisocyanurate foam are disclosed. The catalyst compositions impart increased stability of a mixture of the catalyst, a halogen-containing blowing agent, and a polyol. These catalyst compositions include amine/acid salts with a pH of