申请人:Asahi Kasei Kogyo Kabushiki Kaisha
公开号:EP0274410A2
公开(公告)日:1988-07-13
There is disclosed expandable vinylidene chloride-based resin particles comprising 100 parts by weight of a non-crystalline vinylidene chloride-based resin composition arid 1 to 40 parts by weight of a volatile organic blowing agent or a composition thereof, said resin composition consisting of
a tetrahydrofuran-soluble component [A] which is a random copolymer having a weight-average molecular weight of 10,000 to 600,000 and constituted of different units represented severally by the following general formulae
and
wherein; R1 denotes alkyl of 1 to 4 carbon atoms, cyclohexyl, phenyl, or
each of R6 and R7 being -CH3, -C2H5, -Cl, -Br, -OCH3, or -H; each of R2 and R4 denotes -H or -CH3; R3 denotes halogen, -CN,
n being an integer 1 to 8 and Rs' being -H or -OH;
a tetrahydrofuran-insoluble component [B] which is a random copolymer constituted of different units represented severally by the general formulae (a), (b), and (c) and the following general formula
wherein; (a), (b), (c), Ri, R2, R3, R4, R6 and R7 are defined as above
and Rs denotes phenylene,
m being an integer of 2 to 3, ℓ being an integer of 2 to 5, and k being an integer of 2 to 6;
the proportions of components [A] and [B] satisfying the conditions:
[A] + [B] = 1000/0 by weight
[A] ≧ 20% by weight and said resin composition having a glass transition temperature of at least 85°C, and foarms produced therefrom.
本发明公开了可膨胀的偏二
氯乙烯基树脂颗粒,该颗粒由 100 重量份的非结晶偏二
氯乙烯基树脂组合物和 1 至 40 重量份的挥发性有机发泡剂或其组合物组成,所述
树脂组合物包括
四氢呋喃可溶组分[A],它是一种无规共聚物,其重量-平均分子量为 10,000 至 600,000,由以下通式分别代表的不同单元构成
和
其中;R1 表示 1 至 4 个碳原子的烷基、环己基、苯基,或
R6和R7各自表示-
CH3、-
C2H5、-Cl、-Br、-O 或-H; R2和R4各自表示-H或- ; R3表示卤素、-CN、
n 为 1 至 8 的整数,Rs'为-H 或-OH;
四氢呋喃不溶组分[B],它是由通式(a)、(b)和(c)分别代表的不同单元和下式通式构成的无规共聚物
其中;(a)、(b)、(c)、Ri、R2、R3、R4、R6 和 R7 的定义同上
Rs 表示亚苯基
m 为 2 至 3 的整数,ℓ 为 2 至 5 的整数,k 为 2 至 6 的整数;
满足以下条件的组分 [A] 和 [B] 的比例:
按重量计,[A] + [B] = 1000/0
[A]≧20%(重量百分比),且所述
树脂组合物的
玻璃化转变温度至少为 85°C,以及由此生产的泡沫。