An adhesive agent produced by crosslinking an adhesive agent composition containing a polyester resin (i) having a structural portion derived from a polycarboxylic acid compound (a) and a structural portion derived from a polyol component (b), wherein the polyester resin (i) contains a structural portion derived from at least one selected from the group consisting of a dimer acid compound, a sebacic acid compound, and a dimer diol in a proportion of not less than 60 wt. % based on the weight of the polyester resin (i), wherein the polyol component (b) includes a glycol (b1) having an even carbon number (excluding the dimer diol), wherein the polyester resin (i) has an ester group concentration of not less than 2 mmol/g. The adhesive agent has an adhesive force (α) of not less than 1 N/25 mm as measured under predetermined conditions.

The invention relates to the use of a branched polyester having an average of at least 2.8 terminal groups as additive for a curable pre-polymer composition, wherein the branched polyester acts as de-foaming agent.

Aromatic polyester polyols with high functionality, moderate viscosity, and high aromatic content suitable as the sole polyol in the production of polyurethane foams without the use of any polyether polyols are disclosed. This unique combination of properties makes them suit for use as the sole polyol in the production of polyurethane foams. With reduction of flame retardants, these foams based on sole aromatic polyol can have E-84 class one fire properties. The aromatic polyester polyols of this invention are characterized as having a functionality of greater than 2.8 while having a moderate viscosity ranging from 4,000-10,000 cps @ 25 C. A typical high functional polyester polyol of the present invention has a hydroxyl number in the range of 320-400, viscosity of 4,000-10,000 cps @ 25 C, functionality of greater than 2.8 and percent phenyl content greater than 14.75.

Aromatic polyester polyols with high functionality, moderate viscosity, and high aromatic content suitable as the sole polyol in the production of polyurethane foams without the use of any polyether polyols are disclosed. This unique combination of properties makes them suit for use as the sole polyol in the production of polyurethane foams. With reduction of flame retardants, these foams based on sole aromatic polyol can have E-84 class one fire properties. The aromatic polyester polyols of this invention are characterized as having a functionality of greater than 2.8 while having a moderate viscosity ranging from 4,000-10,000 cps @ 25 C. A typical high functional polyester polyol of the present invention has a hydroxyl number in the range of 320-400, viscosity of 4,000-10,000 cps @ 25 C, functionality of greater than 2.8 and percent phenyl content greater than 14.75.

A method for manufacturing polyester polyhydric alcohol is provided. The method for manufacturing the polyester polyhydric alcohol includes steps as follows. A polybasic acid and a first polyhydric alcohol are mixed for a first oligomerization reaction, so as to form a first oligomer mixture. A second polyhydric alcohol is added into the first oligomer mixture for a second oligomerization reaction when a remaining amount of the first polyhydric alcohol in the first oligomer mixture is lower than or equal to 1 mol %, so as to form a second oligomer mixture. A catalyst is added into the second oligomer mixture for a polycondensation reaction, so as to obtain a polyester polyhydric alcohol product. The polyester polyhydric alcohol product has an Alpha value of lower than 30.

A solid crosslinked polyester composition is disclosed wherein the crosslinked polyester is environmentally degradable in less than about 180 days. The crosslinked polyester is the polyesterification reaction product between one or more multi-hydroxylic alcohols, one or more hydroxy acids, and one or more multi-carboxylic acid compounds. Alternately, the crosslinked polyester is the polyesterification reaction product between one or more multi-hydroxylic alcohols, one or more hydroxy acids, one or more multi-carboxylic acid compounds, and a cyclic ester.

A solid crosslinked polyester composition is disclosed wherein the crosslinked polyester is environmentally degradable in less than about 180 days. The crosslinked polyester is the polyesterification reaction product between one or more multi-hydroxylic alcohols, one or more hydroxy acids, and one or more multi-carboxylic acid compounds. Alternately, the crosslinked polyester is the polyesterification reaction product between one or more multi-hydroxylic alcohols, one or more hydroxy acids, one or more multi-carboxylic acid compounds, and a cyclic ester.

The present invention relates to the use of a liquid composition comprising one or more monomers for the production of a polyester, of a polyamide or of a polyesteramide, where at least one monomer is at least trifunctional, as binder in the binder-jetting process. The invention further relates to a process for the production of a shaped body by binder jetting.

The present invention relates to the use of a liquid composition comprising one or more monomers for the production of a polyester, of a polyamide or of a polyesteramide, where at least one monomer is at least trifunctional, as binder in the binder-jetting process. The invention further relates to a process for the production of a shaped body by binder jetting.

The method is described herein for forming a polymer, comprising providing a first monomer comprising a polyol having at least two hydroxyl groups; providing a second monomer comprising a polyalkyl ester of a polycarboxylic acid having at least two alkyl ester groups; mixing the first monomer and the second monomer to form a reaction mixture; and reacting the first monomer and the second monomer in the mixture by transesterification to form a polyester polymer, which may, if desired be crosslinked. The polymers may also be copolymerized with other monomers. Polymers and copolymers formed from the method herein, as well as articles formed therefrom are also described. Such polymers and articles may be biocompatible and/or bioresorbable.