A polylactic acid resin composition comprising 100 parts by weight of a polylactic acid, (A) 0 to 10 parts by weight of a phenol antioxidant, and (B) 0.01 to 10 parts by weight of at least one amide compound selected from the group consisting of (b-1) an acyclic amide, (b-2) a cyclic amide, (b-3) an acyclic hydrazide, and (b-4) a cyclic hydrazide or (b-5) a compound represented by formula (P):
1
wherein R
a
and R
b
each represent a hydrogen atom, a hydroxyl group, an alkyl group having 1 to 8 carbon atoms, an alkoxy group having 1 to 8 carbon atoms or an aryl group having 6 to 18 carbon atoms, or they are connected to each other to form a ring to make a condensed ring having a total carbon-atom number of 10 to 18; R represents a single bond, an n-valent hydrocarbon group having 2 to 30 carbon atoms, an n-valent heterocyclic group or a group of formula:
2
wherein R′ represents an n-valent hydrocarbon group having 1 to 30 carbon atoms or an n-valent heterocyclic group; X represents a single bond or an alkylene group having 1 to 20 carbon atoms; and n represents 1, 2 or 3,
and n represents 1, 2 or 3.
一种聚
乳酸树脂组合物,包括 100 份(重量)聚
乳酸,(A) 0 至 10 份(重量)
苯酚抗氧剂,和(B) 0.01 至 10 份(重量)至少一种酰胺化合物,该酰胺化合物选自由(b-1)无环酰胺、(b-2)环酰胺、(b-3)无环酰
肼和(b-4)环酰
肼或(b-5)式(P)代表的化合物组成的组:
1
其中 R
a
和 R
b
分别代表氢原子、羟基、具有 1 至 8 个碳原子的烷基、具有 1 至 8 个碳原子的烷氧基或具有 6 至 18 个碳原子的芳基,或者它们相互连接形成一个环,以构成一个总碳原子数为 10 至 18 的缩合环;R 代表单键、具有 2 至 30 个碳原子的正价烃基、正价杂环基或式
2
其中 R′代表具有 1 至 30 个碳原子的正价烃基或正价杂环基; X 代表单键或具有 1 至 20 个碳原子的亚烷基; n 代表 1、2 或 3、
和 n 代表 1、2 或 3。