We are a high-tech enterprise dedicated to the industry of Polyvinylpyrrolidone K17, Crospovidone Sds, Povidone Idone and have a complete and scientific quality management system. We have built a healthier and scientific governance structure for sustainable development, focusing on our main business while promoting the synergistic development of each business unit. Setting appropriate control and equity balance is conducive to enhance the value of the company. In accordance with the management policy of facing the society, diversified operation and all-round development, our company has entered the market in an all-round way.

PVP K90 powder check

1.K value

Take l.00g of this product (calculated as anhydrous), accurately weigh it, put it in a 100ml measuring flask, add an appropriate amount of water to dissolve it, and place it in a constant temperature water bath at 25°C ± 0.05°C for 1 hour, then add water to dilute to the mark. Inspect according to the law (General Principle 0633 three methods), the measured relative viscosity is calculated by the following formula, and the K value should be 27.0~32.0.

2.PH value

Take 1.0g of this product (calculated as anhydrous), add 20ml of water to dissolve, and check according to law (General Rule 0631), the pH value should be 3.0-7.0.

3.Aldehyde

Take about 20.0g of this product (calculated as anhydrous), put it in a round bottom flask, add 180ml of 4.5mol/L sulfuric acid solution, heat to reflux for 45 minutes, let cool; take another hydroxylamine hydrochloride solution (take hydroxylamine hydrochloride 6.95g, add water Dissolve and dilute to 100ml, adjust the pH value to 3.l) 20ml with ammonia test solution, put it in an Erlenmeyer flask, then put the Erlenmeyer flask in an ice bath, connect the distillation device, insert the lower end of the condenser into the hydroxylamine hydrochloride solution Under the liquid surface, heat and distill until the total volume of the receiving liquid is about 120ml, stop the distillation, and titrate the distillate with sodium hydroxide titrant (0.1mol/L) to a pH of 3.1, and use the result of the titration For blank test calibration, the consumption of sodium hydroxide titrant (0.lmol/L) shall not exceed 9.lml.

We will continue to explore innovation, product updates, depending on customer demand for their own responsibility, carefully designed to provide reliable and high-quality PU Adhesive/Shoe Adhesive/Adhesive (PA01/PA02). Our company has always adhered to the business philosophy of establishing a mutually beneficial strategic partnership with customers, creating value for customers with first-class services, and achieving a win-win situation with customers. We continue to deepen the cohesion and common vision of our employees and enhance the soft power of corporate competition.

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