To provide a technique of improving adhesion of a resin molded article including a polyalkylene terephthalate resin to a silicon adhesive. A polyalkylene terephthalate resin is used in which an aromatic dicarboxylic acid excluding terephthalic acid, and/or an ester compound thereof is subjected to copolymerization as a modified component, and the content of the modified component relative to the total dicarboxylic acid component is at least 13 mol % and no more than 35 mol %. It is preferable if the modified polyalkylene terephthalate resin is a modified polybutylene terephthalate resin, and the aromatic dicarboxylic acid and/or an ester compound thereof is isophthalic acid and/or an ester compound thereof.

A branched carboxylic acid functional polyester resin P is described herein along with thermosetting powder coating compositions (PCC A) comprising a binder K, the binder K comprising the polyester resin P and a crosslinker X. The invention further relates to a cured PCC A. In addition, processes for making said PCC A and processes for coating an article with said PCC A are described as well as articles having coated thereon the PCC A and an articles having coated and cured thereon the PCC A.

The invention relates to a branched carboxylic acid functional polyester resin P as described herein. The invention further relates to a thermosetting powder coating composition (PCC A) comprising a binder K, said binder K comprising the P and a crosslinker X. The invention further relates to a cured PCC A. The invention further relates to a process for making said PCC A and processes for coating an article with said PCC A. The invention further relates to an article having coated thereon said PCC A as well as to an article having coated and cured thereon said PCC A. The invention further relates to a thermosetting powder coating composition B (PCC B) comprising a physical mixture of the thermosetting powder coating composition A (PCC A) with a separate, distinct thermosetting powder coating composition A1 (PCC A1). The invention further relates to a process for making said thermosetting powder coating composition B and processes for coating an article with said PCC B. The invention further relates to a cured PCC B. The invention further relates to an article having coated thereon said thermosetting powder coating composition B as well as to an article having coated and cured thereon said thermosetting powder coating composition B. The invention further relates to use of: the polyester resin P, the PCC A, the cured PCC A, the PCC B, the cured PCC B, articles coated with the PCC A, articles coated with the PCC B, articles having coated and cured thereon the PCC A, articles having coated and cured thereon the PCC B. The invention further relates to the use of the polyester resin P for matt powder coatings. The invention further relates to the use of the PCC B for matt powder coatings.

The invention relates to a branched carboxylic acid functional polyester resin P as described herein. The invention further relates to a thermosetting powder coating composition (PCC A) comprising a binder K, said binder K comprising the P and a crosslinker X. The invention further relates to a cured PCC A. The invention further relates to a process for making said PCC A and processes for coating an article with said PCC A. The invention further relates to an article having coated thereon said PCC A as well as to an article having coated and cured thereon said PCC A. The invention further relates to a thermosetting powder coating composition B (PCC B) comprising a physical mixture of the thermosetting powder coating composition A (PCC A) with a separate, distinct thermosetting powder coating composition A1 (PCC A1). The invention further relates to a process for making said thermosetting powder coating composition B and processes for coating an article with said PCC B. The invention further relates to a cured PCC B. The invention further relates to an article having coated thereon said thermosetting powder coating composition B as well as to an article having coated and cured thereon said thermosetting powder coating composition B. The invention further relates to use of: the polyester resin P, the PCC A, the cured PCC A, the PCC B, the cured PCC B, articles coated with the PCC A, articles coated with the PCC B, articles having coated and cured thereon the PCC A, articles having coated and cured thereon the PCC B. The invention further relates to the use of the polyester resin P for matt powder coatings. The invention further relates to the use of the PCC B for matt powder coatings.

Provided are a polyester resin having high heat resistance and degree of crystallinity, a preparation method thereof, and a resin molded article formed therefrom, the resin molded article having superior heat resistance and mechanical strength and maintaining high transparency.

The present invention provides a polyester resin having a self-emulsifying function which is able to form an aqueous emulsion without using any emulsifier and organic solvent. The present invention also provides a water dispersion, an aqueous adhesive, an aqueous ink, a laminate and a packaging material containing the above polyester resin, as well as a method for preparing the water dispersion.

The present invention provides a polyester resin having a self-emulsifying function which is able to form an aqueous emulsion without using any emulsifier and organic solvent. The present invention also provides a water dispersion, an aqueous adhesive, an aqueous ink, a laminate and a packaging material containing the above polyester resin, as well as a method for preparing the water dispersion.

A composition is provided for producing a 3-D printable material comprised of a marine biodegradable base polymer and a gelling agent in a ratio preselected to achieve a desired rate of degradation of a structure printed from the material. Suitable polymers include polycaprolactone (PCL), polyhydroxyalkanoate (PHA), or polybutylene succinate (PBS). The gelling agent is typically agar. Faster rates of degradation of the structure are obtained with larger proportions of gelling agent in the composition. The composition may also include biological materials to further promote or control the biodegradation of the structure, and other additives such as nutrients for microorganisms or solidifying agents. 3-D printing of the material occurs at relatively lower temperatures to avoid damage to the biological materials.

A copolymerized polyester resin containing a unit (A) represented by the following formula (1), a diol unit (B), and a unit (C) derived from a dicarboxylic acid or an ester-forming derivative of the dicarboxylic acid, wherein a content of the unit (A) based on total units of the copolymerized polyester resin is 10 to 95 mol %, and the copolymerized polyester resin satisfies the following conditions (1) to (3): (1) a glass transition temperature of the copolymerized polyester resin is 90 C. or higher; (2) an amount of heat generated by the copolymerized polyester resin at cooling crystallization is 5 J/g or less; and (3) an absolute value of photoelastic coefficient of the copolymerized polyester resin is 4010.sup.12 Pa.sup.1 or less: ##STR00001## wherein R.sub.1 is a hydrogen atom, CH.sub.3, or C.sub.2H.sub.5, R.sub.2 and R.sub.3 are each independently a hydrogen atom or CH.sub.3, and n is 0 or 1.

A copolymerized polyester resin containing a unit (A) represented by the following formula (1), a diol unit (B), and a unit (C) derived from a dicarboxylic acid or an ester-forming derivative of the dicarboxylic acid, wherein a content of the unit (A) based on total units of the copolymerized polyester resin is 10 to 95 mol %, and the copolymerized polyester resin satisfies the following conditions (1) to (3): (1) a glass transition temperature of the copolymerized polyester resin is 90 C. or higher; (2) an amount of heat generated by the copolymerized polyester resin at cooling crystallization is 5 J/g or less; and (3) an absolute value of photoelastic coefficient of the copolymerized polyester resin is 4010.sup.12 Pa.sup.1 or less: ##STR00001## wherein R.sub.1 is a hydrogen atom, CH.sub.3, or C.sub.2H.sub.5, R.sub.2 and R.sub.3 are each independently a hydrogen atom or CH.sub.3, and n is 0 or 1.