An object of the present invention is to provide a polycarbonate resin composition and a molded article, which are excellent in jet-blackness, image sharpness, impact resistance, scratch resistance owing to high hardness, flame retardancy and heat retention stability. The present invention provides a resin composition comprising a polycarbonate resin comprising a structural unit derived from a cyclic ether structure-containing dihydroxy compound and a coloring agent, which is a polycarbonate resin composition having an L* value of 6 or less as measured by the reflected light method of JIS K7105; and a molded article using the resin composition. The resin composition and the molded article of the present invention can be used over a wide range of fields allowing a product to be imparted with a high-grade appearance and a dignified impression.

A multi-layer sheet suitable as sealable or peelable sheet specially used for closing foodstuff containers. This multi-layer sheet comprises a polymeric substrate layer and a seal or a peel-seal layer. The multilayer composite film has at least two main component layers, namely in order, a polymeric substrate layer for mechanical strength and a heat-sealable layer applied by extrusion-coating, comprising a polyester of at least one aromatic dicarboxylic acid and at least one aliphatic dicarboxylic acid and at least one aliphatic diol. The polyester substrate layer comprises a crystallizable polyester base layer and an amorphous polyester sealable skin layer. The heat-sealable layer is slow-crystallizing with a glass transition temperature 50 F. or lower and melting point 250-320 F.

A multi-layer sheet suitable as sealable or peelable sheet specially used for closing foodstuff containers. This multi-layer sheet comprises a polymeric substrate layer and a seal or a peel-seal layer. The multilayer composite film has at least two main component layers, namely in order, a polymeric substrate layer for mechanical strength and a heat-sealable layer applied by extrusion-coating, comprising a polyester of at least one aromatic dicarboxylic acid and at least one aliphatic dicarboxylic acid and at least one aliphatic diol. The polyester substrate layer comprises a crystallizable polyester base layer and an amorphous polyester sealable skin layer. The heat-sealable layer is slow-crystallizing with a glass transition temperature 50 F. or lower and melting point 250-320 F.

The present invention relates to an alkyd resin comprising the condensation product of at least the following components (A) a polybasic acid, (B) a polyhydric alcohol, and (C) a linear C.sub.12-C.sub.60 hydrocarbo monocarboxylic acid, and optionally (D) at least one component other than any of components A to C characterized in that at least a part of the polybasic acid (A) is a (optionally hydrogenated) Diels Alder adduct of citraconic acid with C.sub.4-C.sub.14 conjugated diene, a (optionally hydrogenated) Diels Alder adduct of citraconic anhydride with C.sub.4-C.sub.14 conjugated diene, a half ester of such a Diels Alder adduct and/or a diester of such a Diels Alder adduct.

To provide a polyester polyol from which a polyurethane having acid resistance and alkali resistance can be produced.

A polyester polyol containing 1,3-propanediol having an alicyclic skeleton in a side chain, 3-methyl-1,5-pentanediol and a dibasic acid component as constituent components.

This invention relates to a curable coating composition comprising: I. at least one acetoacetate functional polyester further comprising the residues of a. a hydroxyl component comprising: i. a diol in an amount ranging from 70 to 100 mole %, based on the total moles of (i) and (ii); and ii. a polyol in an amount ranging from 0 to 30 mole %, based on the total moles of (i) and (ii); b. a carboxyl component comprising a polycarboxylic acid compound, a derivative of polycarboxylic acid compound, or a combination thereof; and c. an alkyl acetoacetate, a diketene, or a combination thereof in an amount ranging from about 5 to about 50 weight %, based on the total weight of (a), (b), and (c). II. a curing agent having two or more aldehyde functional groups, and III. a basic catalyst.

This invention relates to a curable coating composition comprising: I. at least one acetoacetate functional polyester further comprising the residues of a. a hydroxyl component comprising: i. a diol in an amount ranging from 70 to 100 mole %, based on the total moles of (i) and (ii); and ii. a polyol in an amount ranging from 0 to 30 mole %, based on the total moles of (i) and (ii); b. a carboxyl component comprising a polycarboxylic acid compound, a derivative of polycarboxylic acid compound, or a combination thereof; and c. an alkyl acetoacetate, a diketene, or a combination thereof in an amount ranging from about 5 to about 50 weight %, based on the total weight of (a), (b), and (c). II. a curing agent having two or more aldehyde functional groups, and III. a basic catalyst.

Provided are a retardation film that has a high heat resistance, has excellent formability and handleability even in a single-layer structure, has a negative thickness-direction retardation Rth value, and is suitable as a negative A-plate or a positive C-plate and a method for producing the film. The retardation film is formed of a stretched film of a polyester resin, contains a unit (A1) represented by the formula (1) as a diol unit (A) and a unit (B1) represented by the formula (2a) or (2b) as a dicarboxylic acid unit (B), and is a negative A-plate or a positive C-plate. ##STR00001## In the formulae, Z.sup.1 and Z.sup.2 represent an aromatic hydrocarbon ring, R.sup.1, R.sup.2a, R.sup.2b, R.sup.3a and R.sup.3b represent a substituent, k, p1 and p2 denotes an integer of 0 to 8, q denotes an integer of 0 to 4, m1, m2, n1 and n2 denotes an integer of not less than 0, A.sup.1a and A.sup.1b represents an alkylene group, and A.sup.2a, A.sup.2b and A.sup.3 represents a divalent hydrocarbon group.

Provided are a retardation film that has a high heat resistance, has excellent formability and handleability even in a single-layer structure, has a negative thickness-direction retardation Rth value, and is suitable as a negative A-plate or a positive C-plate and a method for producing the film. The retardation film is formed of a stretched film of a polyester resin, contains a unit (A1) represented by the formula (1) as a diol unit (A) and a unit (B1) represented by the formula (2a) or (2b) as a dicarboxylic acid unit (B), and is a negative A-plate or a positive C-plate. ##STR00001## In the formulae, Z.sup.1 and Z.sup.2 represent an aromatic hydrocarbon ring, R.sup.1, R.sup.2a, R.sup.2b, R.sup.3a and R.sup.3b represent a substituent, k, p1 and p2 denotes an integer of 0 to 8, q denotes an integer of 0 to 4, m1, m2, n1 and n2 denotes an integer of not less than 0, A.sup.1a and A.sup.1b represents an alkylene group, and A.sup.2a, A.sup.2b and A.sup.3 represents a divalent hydrocarbon group.

The present disclosure relates to a melt-spun high-viscosity PET/low-viscosity PET two-component elastic fiber and a preparation method therefor. The preparation method adopts a six-reactor process. Terephthalic acid and ethylene glycol undergo first and second esterification reactions and first and second prepolymerization reactions, and an obtained ethylene terephthalate prepolymer is respectively introduced into a high-viscosity final polymerization reactor and a low-viscosity final polymerization reactor for polymerization reaction to obtain a high-viscosity melt and a low-viscosity melt, respectively, and then the two melts are spun together. The viscosity of the high-viscosity component can be significantly improved, and a wider range of viscosity difference between the high-viscosity and low-viscosity polyester melts can be obtained. A difference between the intrinsic viscosity of the high-viscosity melt and the intrinsic viscosity of the low-viscosity melt is 0.100-0.550; the prepared PET/PET two-component elastic fiber has high quality and high crimp shrinkage rate.