申请人:Takeda Chemical Industries, Ltd.
公开号:EP0078445A1
公开(公告)日:1983-05-11
A polyurethane foam produced by the reaction of a polyisocyanate and a polyether polyol in the presence of a catalyt, a cell regulating agent and water as a blowing agent, the polyether polyol of which consists of a halogenated polyether polyol (I) of the general formula:
[wherein x is a number of 0 to 7; y is a number of 2 to 3; A is a saturated or unsaturated, brominated polyol residue having a number of functional groups of y; R is hydrogen or an alkyl group having 1 to 5 carbon atoms] and (II) a polyether polyol having a number of functional groups of 2 to 8, a weight ratio of the added amounts of propylene oxide and ethylene oxide within the range of about 75 to 95/25 to 5 and a hydroxyl number of about 20 to 100 mgKOH/g, whereby a weight ratio of (I) to (II) is about 95 to 25/5 to 75 and the amount of water is about 5 to 20 parts by weight against 100 parts by weight of the polyol component.
The polyurethane foam has uniform and open cells and shows excellent physical properties in compressive strength, tensile strength, excellent sound absorption characteristics and flame resistance, and is therefore used as thermal insulation materials, acoustic absorption materials and shock absorption materials for houses, vehicles, etc.
一种聚氨酯泡沫塑料,由多异氰酸酯和聚醚多元醇在催化剂、泡孔调节剂和作为发泡剂的水存在下反应制得,其聚醚多元醇由通式为(I)的卤代聚醚多元醇组成:
[其中 x 为 0 至 7 的数字;y 为 2 至 3 的数字;A 为饱和或不饱和溴化多元醇残基,其官能团数为 y;R为氢或具有 1 至 5 个碳原子的烷基]和(II)具有 2 至 8 个官能团的聚醚多元醇,环氧丙烷和环氧乙烷的添加量的重量比在约 75 至 95/25 至 5 的范围内,羟基数约为 20 至 100 mgKOH/g,其中(I)与(II)的重量比约为 95 至 25/5 至 75,水量约为 5 至 20 份重量比 100 份重量比的多元醇组分。
这种聚氨酯泡沫具有均匀和开放的孔隙,在抗压强度、抗拉强度、吸音特性和阻燃性能方面显示出优异的物理性能,因此可用作房屋、车辆等的隔热材料、吸音材料和减震材料。