1. Product advantages

♦ High purity, all above 98.5%, no impurities after dissolution

♦ We will test each batch to ensure quality

♦ OEM and private brand services designed for free

♦ Various cap colors available

♦ We can also provide MT1 peptide powder

2. Factory advantages

♦ Professional research team

♦ More than 5 doctors in high-tech R&D laboratories

♦ More than 1000 m2 of factory production line to ensure stable supply

♦ More than 1200 factories to manufacture products and control quality

3. Service advantages

♦ 24-hour online service

♦ Track package information and update it for customers

♦ Professional sales team

♦ Accept small order service

♦ Redelivery service if detained by customs

Physical and chemical properties of polyaspartic acid

Density 1.5± 0.1g /cm3

Boiling point 264.1±30.0 °C at 760 mmHg

Molecular formula (C3H5ClO·C2H7N·H3N)x

Molecular weight 133.103

Flash point 113.5±24.6 °C

Accurate mass 133.037506

LogP minus 0.67

Vapor pressure 0.0±1.1 mmHg at 25°C

Refractive index 1.531

stability

Light yellow transparent water solution, pH 9.5, has excellent dispersion of multiple inorganic and organic ions in water, can be biodegradable to non-toxic substances, is a very ideal water treatment agent.

Preparation of polyaspartic acid

There are generally two kinds of PASP synthesis.

(1) L-aspartic acid anhydrous thermal polymerization L-aspartic acid (L-ASP) is a white leaf crystalline powder, which exists in the nature of beet molasses, milk albumin, albumin, bovine cheese and other proteins. L-ASP can be produced by immobilized aspartase using fumaric acid as substrate. Aspartic acid is one of the few amino acids that can be homopolymerized by heating.

When heated to 350 ~ 400℃, in the presence of catalyst or no catalyst, aspartic acid can produce linear thermoplastic polycondensation product polysuccinimide. The random copolymer can be obtained by hydrolyzing polysuccinimide with alkali solution. And usually only has L  amino acid compared to natural protein, full of racemic with polymer. The reaction process is easy to control and repeatable. The conversion rate of monomer to polymer can reach more than 95%. The molecular weight of the polymer can be adjusted by adding catalyst to form melt phase during polymerization.

(2) maleic acid thermal polymerization of polysuccinimide can also be produced by the thermal polymerization of maleic acid and ammonia at 160℃, so that the relative molecular weight of the resulting polyaspartic acid is usually less than 2500.