Resin composition and molded product thereof

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):

• 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;
• 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, and
• a3) 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, if desired, 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
• [Chem. 2]
• 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
• [Chem. 3]
• 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 general 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
• [Chem. 5]
• 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 polyepoxide
• or 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 98/2 to 50/50 in terms of weight ratio.