NEOPENTYL GLYCOL MONO(HYDROXYPIVALATE) Chemical Properties

Melting point:

46-50°C

Boiling point:

292°C

Density 

1.01

Flash point:

292°C

solubility 

Soluble in methanol(almost transparency).

pka

14.15±0.10(Predicted)

form 

powder to crystal

color 

White to Almost white

Water Solubility 

239g/L at 25℃

Sensitive 

Hygroscopic

InChIKey

SZCWBURCISJFEZ-UHFFFAOYSA-N

LogP

0.858 at 25℃

CAS DataBase Reference

1115-20-4(CAS DataBase Reference)

EPA Substance Registry System

Neopental glycol monohydroxypivalate (1115-20-4)

Safety Information

Hazard Codes 

Xi

Risk Statements 

36-41

Safety Statements 

26-36-39

TSCA 

Yes

HS Code 

2909.49.6000

Hazardous Substances Data

1115-20-4(Hazardous Substances Data)

NEOPENTYL GLYCOL MONO(HYDROXYPIVALATE) Usage And Synthesis

Description

Neopentyl Glycol Mono(hydroxypivalate) is also known as Hydroxypivalic acid neopentyl glycol ester (HPN). The compound has properties similar to neopentyl glycol but in addition specific characteristics that are responsible for its increasing use. Manufacturers are Eastman Chemical, BASF, and Mitsubishi Gas. World capacity is estimated at 2000 – 2500 t/a. It is highly soluble in polar organic solvents. Both hydroxyl groups undergo the usual reactions of primary alcohols. As with neopentyl glycol, the quaternary structure contributes to the excellent stability of HPN derivatives.

Uses

Neopentyl Glycol Mono(hydroxypivalate) is used as a diol modifier in polyesters for powder, coil, and automotive coatings. HPN imparts the polyesters excellent weatherability, flexibility and resin solubility as well as lower melt viscosity and glass transition temperature. In powder coatings hydroxypivalic acid neopentyl glycol ester improves the appearance by increasing the flow and leveling, because it gives less cyclic compounds than neopentyl glycol during the polyester synthesis. Because of their improved flexibility polyesters containing HPN are used in automotive coatings to give enhanced stone chip resistance and in coil coatings with high demand on both flexibility and weather resistance. Acrylated hydroxypivalic acid neopentyl glycol ester is used in UV-curable coatings for inks and wood coating.

Preparation

Neopentyl Glycol Mono(hydroxypivalate) is produced by a Tishchenko reaction directly from hydroxypivaldehyde in the presence of a basic catalyst (e.g., aluminum oxide) or classically by thermal treatment. Alternatively, it can be synthesized by esterification of neopentyl glycol with hydroxypivalic acid. High-purity hydroxypivalic acid neopentyl glycol ester is obtained by subsequent distillation.

Flammability and Explosibility

Not classified

NEOPENTYL GLYCOL MONO(HYDROXYPIVALATE)(1115-20-4)Related Product Information

• 2-[4-(HYDROXYMETHYL)-2-NITROPHENOXY]ACETIC ACID METHYL ESTER
• 3-Hydroxypivalic acid
• TETRA-(BIS-METHYLOLPROPIONIC ACID DIALLYL ETHER)-PENTAERYTHRITOL ESTER
• 3-HYDROXY-2,2-DIMETHYLPROPYL 3-HYDROXY-2,2-DIMETHYLPROPIONATE DIACRYLATE
• NEO-PENTYLPIVALATE
• HYDROXYPIVALYL HYDROXYPIVALATE BIS[6-(ACRYLOYLOXY)HEXANOATE]
• NEOPENTYL GLYCOL MONO(HYDROXYPIVALATE)