Provided are a bisphenol represented by the general formula (1), a method for producing the bisphenol, and a polyarylate resin, a (meth)acrylate compound and an epoxy resin which are derived from the bisphenol. In the formula (1), R.sub.1 to R.sub.4 are the same or different, and each represent an alkyl group, an aryl group or a halogen atom, n.sub.1 and n.sub.2 are the same or different, and each represent an integer of 1 to 4, and k.sub.1 to k.sub.4 are the same or different, and each represent 0 or an integer of 1 to 4. When at least one of k.sub.1 to k.sub.4 is 2 or more, corresponding R.sub.1 to R.sub.4 may be the same or different.

Provided are a bisphenol represented by the general formula (1), a method for producing the bisphenol, and a polyarylate resin, a (meth)acrylate compound and an epoxy resin which are derived from the bisphenol. In the formula (1), R.sub.1 to R.sub.4 are the same or different, and each represent an alkyl group, an aryl group or a halogen atom, n.sub.1 and n.sub.2 are the same or different, and each represent an integer of 1 to 4, and k.sub.1 to k.sub.4 are the same or different, and each represent 0 or an integer of 1 to 4. When at least one of k.sub.1 to k.sub.4 is 2 or more, corresponding R.sub.1 to R.sub.4 may be the same or different.

A thermoplastic polyester including: at least one 1,4:3,6-dianhydrohexitol unit (A); at least one cyclic diol unit (B) other than cyclohexanedimethanol units and 1,4:3,6-dianhydrohexitol units (A); and at least one aromatic carboxylic diacid unit (C), the polyester being free from ethylene glycol units. It also relates to the production method and use of same.

A resin composition and a filter element are provided. The resin composition includes a black coloring agent (A), an ethylenically-unsaturated monomer (B), a solvent (C), a resin (D), and a photoinitiator (E). The black coloring agent (A) includes a titanium black (A-1) and a carbon black (A-2). Based on a total usage amount of 100 parts by weight of the titanium black (A-1) and the carbon black (A-2), a usage amount of the titanium black (A-1) is 50 parts by weight to 75 parts by weight.

A resin composition and a filter element are provided. The resin composition includes a black coloring agent (A), an ethylenically-unsaturated monomer (B), a solvent (C), a resin (D), and a photoinitiator (E). The black coloring agent (A) includes a titanium black (A-1) and a carbon black (A-2). Based on a total usage amount of 100 parts by weight of the titanium black (A-1) and the carbon black (A-2), a usage amount of the titanium black (A-1) is 50 parts by weight to 75 parts by weight.

Provided are a thermosetting resin composition whose cured product exhibits a low dielectric constant and a low loss tangent as well as excellent flame retardancy, heat resistance, and thermal decomposition resistance, a cured product obtained from the thermosetting resin composition, and an active ester resin for use in the thermosetting resin composition. Specifically, the thermosetting resin composition contains, as essential components, an epoxy resin and an active ester resin having a resin structure that has a structural segment represented by formula (I) below and monovalent aryloxy groups at both terminals:

##STR00001##

Provided are a thermosetting resin composition whose cured product exhibits a low dielectric constant and a low loss tangent as well as excellent flame retardancy, heat resistance, and thermal decomposition resistance, a cured product obtained from the thermosetting resin composition, and an active ester resin for use in the thermosetting resin composition. Specifically, the thermosetting resin composition contains, as essential components, an epoxy resin and an active ester resin having a resin structure that has a structural segment represented by formula (I) below and monovalent aryloxy groups at both terminals:

##STR00001##

A resin including a unit of Chemical Formula 1, a method for preparing the same, a resin composition including the same, and a molded article including the resin composition are described:

##STR00001## wherein all the variables are described herein.

The present invention is related to the application of solid polymers or copolymers prepared from monomers having in their structure a polycyclic aromatic ring, an aromatic ring of the type of naphthalene, or polyesters, polyethers, polyamides or polyvynil derivatives having naphthalene units in their structure, in the hydrotreatment or hydrocracking of heavy hydrocarbons, such as heavy or extra-heavy crude oils or residues from the distillation of petroleum; these polymers or copolymers may be supported, anchored or in a physical mixture with metallic oxides such as alumina, silica, titania or kaolin, and they have an application as heterogeneous hydrogen donors in reactions of hydrotreatment or hydrocracking of heavy or extra-heavy crude oils, residues from the distillation of petroleum and cuts and streams deived from this distillation. These solid polymers or copolymers operate in the presence of hydrogen or methane-rich gas. These hydrogen donor polymers, being solid, may be recovered from the reaction mixture to be reused and have a thermal stability that allows for their use in reactions at temperatures above 450 C. These heterogeneous hydrogen donors improve the physical properties of crude oils, such as API gravity, viscosity, and distillates yield, inhibiting the formation of coke.

The invention provides a polyester resin for heat-shrinkable film which contains terephthalic acid as a main component of a dicarboxylic acid component, contains ethylene glycol as a main component of a diol component, and contains from 18 to 32% by mole of neopentyl glycol and from 7 to 15% by mole of diethylene glycol when a total amount of the whole diol component in total polyester resin components is taken as 100% by mole. The polyester resin has (i) an intrinsic viscosity (IV) of not less than 0.65 and less than 0.70 dl/g, (ii) a carboxyl end group concentration (AV) of 8-25 eq/t, (iii) a color b value of 1.0-8.0 in an L*a*b* color system, and (iv) aluminum and phosphorus atoms, wherein the aluminum atoms are present in an amount of 15-40 ppm, and wherein the molar ratio of the phosphorus atoms to the aluminum atoms is 1.8-2.6.