| 摘要 |
Provided is a resin composition from which a melt molded product which is excellent in transparency, gas barrier property and flexibility and has biodegradability can be obtained. The present invention relates to a resin composition, which comprises a polyvinyl alcohol-based resin (i) comprising a structural unit represented by the following general formula (1) and an aliphatic-aromatic polyester (ii) comprising a specific component, wherein each of R1, R2 and R3 independently represents a hydrogen atom or an organic group, X represents a single bond or a bonding chain, and each of R4, R5 and R6 independently represents a hydrogen atom or an organic group.; |
| 主权项 |
1. A resin composition, which comprises a polyvinyl alcohol-based resin (i) comprising a 1,2-diol structural unit represented by the following formula (1) in an amount of 1 to 15% by mol and an aliphatic-aromatic polyester (ii): wherein each of R1, R2 and R3 independently represents a hydrogen atom or an alkyl group having from 1 to 4 carbon atoms, X represents a single bond or an alkylene group having 6 or less carbon atoms, and each of R4, R5 and R6 independently represents a hydrogen atom or an alkyl group having from 1 to 4 carbon atoms; wherein the aliphatic-aromatic polyester (ii) includes a polyester comprising, as essential components: A) an acid component composed of
a1) 40 to 75 mol % of at least one aliphatic dicarboxylic acid or its/their ester-forming derivatives or mixtures thereof,a2) 25 to 60 mol % of at least one aromatic dicarboxylic acid or its/their ester-forming derivative or mixtures thereof, anda3) 0 to 5 mol % of a sulfonated compound; B) a diol component composed of at least one C2- to C12-alkanediol or mixtures thereof; and, optionally, one or more components selected from C) a component selected from
c1) at least one dihydroxy compound comprising ether functions and having the formula I
HO—[(CH2)n—O]m—H (I) where n represents 2, 3 or 4 and m represents an integer from 2 to 250,
c2) at least one hydroxy-carboxylic acid of the formula II
HO—[C(O)-G-O]p—H (II) where p represents an integer from 1 to 1500 and G represents a radical selected from the group consisting of phenylene, o-hydroxyphenylene, —(CH2)q—, where q is an integer from 1 to 5, —C(R)H— and —C(R)HCH2, where R represents methyl or ethyl,
c3) at least one amino-C2- to C12-alkanol or at least one amino-C5- to C10-cycloalkanol or mixtures thereof,c4) at least one diamino-C1- to C8-alkane,c5) at least one 2,2′-bisoxazoline of the formula III where R1 represents a single bond, a (CH2)z alkylene group, where z=2, 3 or 4, or a phenylene group,
c6) at least one amino carboxylic acid selected from the group consisting of natural amino acids, polyamides obtainable by polycondensation of a dicarboxylic acid having 4 to 6 carbon atoms and a diamine having 4 to 10 carbon atoms, compounds of the formula IV
HO—[C(O)-T-O]s—H (IV)where s represents an integer from 1 to 1500 and T represents a radical selected from the group consisting of phenylene, —(CH2)u—, where u represents an integer from 1 to 12, —C(R2)H— and —C(R2)HCH2, where R2 represents methyl or ethyl,or mixtures of c1) to c6); and D) a component selected from:
d1) a compound having at least three groups capable of ester formation,d2) a di- or polyisocyanate,d3) a di- or polyepoxideor mixtures of d1) to d3), wherein a content ratio (i)/(ii) of the polyvinyl alcohol-based resin (i) to the aliphatic-aromatic polyester (ii) is from 95/5 to 60/40 in terms of weight ratio. |
