Table of contents
1. Hangzhou Rainbow Import and Export Co., Ltd.
2. Nantong Zhonghe Chemical New Materials
3. Lianyungang Ronghe New Materials
1. Hangzhou Rainbow Import and Export Co., Ltd.
In 1992, the company's predecessor, Zhejiang Sunflower New Materials Co., Ltd., was established, specializing in PVP production. Mr. Wu Jiaxiang, the chief expert of the national PVP research and development project, served as the general manager. In 2002, the company was restructured into a private enterprise and Hangzhou Sunflower Technology Development Co., Ltd. (STD) was established to continue to develop and produce PVP series of technical and cosmetic products. The company has a GMP production line with an annual output of 600 tons of low molecular weight povidone (povidone K12, K15, K17, K25, K30), 800 tons of high molecular weight povidone (povidone K60, K90, K120), 300 tons of high stability povidone iodine, and 100 tons of sodium chondroitin sulfate.
Product Features
As a professional manufacturer, Hangzhou Rainbow Import & Export Co., Ltd. is mainly engaged in import and export trade, mainly producing chemical products such as povidone, cross-linked povidone, povidone iodine, chondroitin sulfate, etc. The characteristics of these products are as follows:
1. Povidone: It is a linear 1-vinyl-2-pyrrolidone synthetic polymer that can absorb toxins. It is usually made into injections and used for certain poisoning diseases.
2. Cross-linked povidone: It is a water-insoluble synthetic cross-linked N-vinyl-2-pyrrolidone homopolymer. It is a white or off-white powder, almost odorless, and hygroscopic. It is insoluble in water, ethanol, chloroform or ether. It has a high capillary/water content, a large specific surface area, extremely strong hydration ability, high and rapid water absorption, strong water absorption and expansion ability, and a swelling coefficient of 2.25-2.30. It also has the same complexing ability as polyvinyl pyrrolidone and can complex a variety of substances. It is often used as a water-insoluble tablet disintegrant, dry adhesive, filler and excipient, etc. It can also be used as a dissolution promoter.
3. Povidone iodine: There are many dosage forms. The solution can be used for skin fungal infections, suppurative dermatitis, small-area mild burns and scalds, and small-area skin and mucosal wounds. The suppository is used for candidal vulvovaginal disease, bacterial vaginosis, mixed infection vaginitis, and hemorrhoids; gels, creams, and vaginal effervescent tablets are used for candidal vulvovaginal disease, bacterial vaginosis, and mixed infection vaginitis; the film is used to treat candidal vaginitis; the gargle is used for oral diseases such as stomatitis, oral ulcers, pharyngitis, pericoronitis, and periodontitis. It can also be used for disinfection before oral surgery and daily oral disinfection and health care.
4. Chondroitin sulfate: There are oral preparations, injections, and eye drops. Oral preparations can lower blood lipids, treat hyperlipidemia, prevent and treat various cardiovascular diseases, treat various pains, promote healing of traumatic wounds, assist in the treatment of diseases such as nephritis and chronic hepatitis, and also have anti-tumor effects; injections are mainly used for the auxiliary treatment of atherosclerotic diseases, neuralgia, neuralgia, and joint pain; eye drops have the effect of promoting corneal wound healing, exudate absorption and eliminating inflammation, and are used for diseases such as keratitis, corneal injury, and corneal ulcers.
Company's popular products
Product Standards
| Solution Appearance (10%) | Bs,Rs or BY₅ | Impurity C | 0.001%max |
| Aldehyde | 500ppm max | Loss on drying | 5.0%max |
| Peroxide | 400ppm max | Sulfated ash | 0.1%max |
| Hydrazine | 1ppm max | K value | 25.2-30.8 |
| Impurity A | 0.5%max | VAc content | 35.3%-41.4% |
| Impurity B | 0.001%max | Nitrogen content | 7.0%-8.0% |
Service Concept
1. Customer first: As an import and export enterprise, we will focus on meeting customer needs, and be committed to providing high-quality commodity procurement and import and export services for domestic and foreign customers, striving to meet customer requirements in terms of product variety, quality, price, delivery time, etc., and take customer satisfaction as an important criterion for measuring service quality.
2. Integrity management: In business activities, we uphold the principle of integrity, truthfully provide customers with information on products, service content and prices, do not defraud or conceal, strictly fulfill contractual agreements, ensure fairness, justice and transparency of transactions, and establish long-term and stable cooperative relationships with customers.
3. Professional and efficient: The company's team members have professional import and export business knowledge and rich industry experience, can provide customers with professional consulting and solutions, efficiently handle orders, customs declarations, logistics and other links, reduce customers' time costs and energy consumption, and ensure that goods can be imported and exported quickly and smoothly.
4. Innovation and enterprising: Pay attention to market dynamics and industry development trends, continuously innovate service models and business content, actively explore new markets and business opportunities, provide customers with more diversified product and service options, drive corporate development with innovation, and create greater value for customers.
5. Win-win cooperation: We attach importance to the cooperative relationship with suppliers, customers, logistics partners and other parties. By establishing a good cooperation mechanism, we can achieve resource sharing, complementary advantages, jointly explore the market, maximize the interests of all parties in the cooperation, and promote the coordinated development of the industry.
2. Nantong Zhonghe Chemical New Materials
Nantong Zhonghe Chemical New Materials Co., Ltd. is a chemical enterprise mainly engaged in R&D and trade. The establishment time has not been clearly disclosed. It is mainly engaged in the import and export of polymer materials and fine chemical products. The company is located in Sutong Science and Technology Industrial Park, Nantong City, Jiangsu Province. Its core business covers the fields of medicine, coatings, personal care, flavors and fragrances, and provides products such as diethylaminoethyl methacrylate, dipropylene glycol dibenzoate, and dibutyl maleate. The products cover many fields but lack technical barriers, and the foundation of environmental protection and compliance is weak. The production scale and market competitiveness are both at the middle and lower levels of the industry.
●Product features
1. Wide product line coverage:
The product types are diverse, involving pharmaceutical intermediates, environmentally friendly solvents, functional additives, etc., but the core technology barriers or exclusive patents are not clearly mentioned in the public information.
Some products (such as trihydroxypropane triglycidyl ether) have a purity of 99%, but the market competition for similar products is fierce and the price transparency is low.
2. Technology and compliance：
It supports customized production, but does not disclose advanced production processes or automation equipment investment, and may rely on traditional synthesis technology.
It has passed ISO 9001 quality management system certification, but does not mention compliance capabilities of higher standards (such as FDA, GMP), and there are limitations in international market expansion.
3. Environmental protection and sustainability:
Although bio-based materials (such as erythritol) and environmentally friendly solvents are mentioned, energy-saving and emission reduction measures or green technology innovations in the production process are not clearly stated, and environmental protection investment may be limited.
3. Lianyungang Ronghe New Materials
Located in Lianyungang Economic and Technological Development Zone, Jiangsu Province. The company's business scope covers the research and development, production and sales of polymer materials and chemical products (excluding dangerous goods), as well as self-operated and agency import and export business of various commodities and technologies. As a local small and medium-sized enterprise, its technical capabilities and market position are at the bottom of the industry.
●Product features
1. Business direction speculation:
Combined with the industrial layout of Lianyungang Economic Development Zone (such as carbon fiber, membrane materials, spandex, etc.), it is speculated that the company may be involved in the processing or trade of polymer materials, such as functional plastics, synthetic fibers or composite materials.
Specific product types (such as polyimide, polyurethane, etc.) and application fields (such as electronics, medical, industry).
2. Technology and compliance:
The company's patented technology, core process or international certification (such as ISO, FDA) information, technical capabilities are questionable.
The production scale is small, and it may be mainly OEM or primary processing, lacking independent research and development capabilities.
Jiangsu Congzhong Chemical Co., Ltd. was established in 2023 with a registered capital of 15 million yuan. It is located in Suzhou, Jiangsu Province. It is a private enterprise mainly engaged in the trade of chemical products. The company's business scope covers the technical research and development of biochemical products, the promotion of new material technology and the sales of chemical products (excluding hazardous chemicals). Jiangsu Congzhong Chemical focuses on trade and distribution of basic chemical products. It lacks technical accumulation and independent production capabilities, and has weak market competitiveness. It mainly serves regional small and medium-sized enterprises and is at the middle and lower levels in the industry.
●Product features
1. Wide business coverage but lack of technical barriers:
Product types include epoxy active diluents (such as trihydroxypropane triglycidyl ether, polyethylene glycol diglycidyl ether), environmentally friendly solvents (such as white oil, anti-white water), chemical cleaning agents (such as paint strippers, screen washing water), etc., covering multiple industries such as electronics, printing, and hardware electroplating.
The purity of some products (such as copper oxide and vinblastine sulfate) is marked as 99%, but no specific process technology or patent support is provided. It is speculated that conventional synthesis or outsourced raw material processing is the main method.
2. Dependence on external supply chain:
The company's official website has limited information and does not display production equipment or laboratories. In fact, it may be centered on trade agency and simple packaging, and lacks large-scale production capacity.
Although the Yueyang base mentions the production of epoxy active diluents, it does not explain the scale of production capacity or automation level. It may rely on traditional processes and have low output.
3. Market positioning is low-end：
Product prices are at a medium level in the industry (e.g. copper oxide is quoted at 46,000 yuan/ton), mainly competing through cost advantages, without reflecting technology premium.
The customer base is mainly small and medium-sized enterprises (such as handbag, shoe material, toy manufacturing companies), and has not entered the high-end field or cooperated with well-known companies.
Hubei Jianchu Biopharmaceutical Co., Ltd. was established in 2014 with a registered capital of RMB 5 million. It is located in Wuhan, Hubei Province. The company's core business is the research and development and trade of chemical intermediates, pharmaceutical intermediates and fine chemical products, mainly involving photoinitiators, UV absorbers, biological buffers, amino acid derivatives and other fields. Its products cover the pharmaceutical, cosmetics, pesticide, electronics and other industries. With the trade of basic chemical products and primary research and development as the core, its technology accumulation and production scale are at the middle and lower levels of the industry, lacking differentiated competitiveness and having a weak market position.
●Product features
1. The product line covers a wide range but the technical content is limited:
The products include photoinitiators (such as 4-hydroxyvinyloxybenzophenone methacrylate), UV absorbers (such as BP-6, octocrylene), pharmaceutical intermediates (such as 5,6-dihydroxyindole), etc., but the core patent technology or exclusive production process is not clearly mentioned in the public information.
Some products are marked with a purity of 99% (such as 4-hydroxyvinyloxybenzophenone methacrylate), but the technical route used is not stated. It is speculated that the traditional synthesis process is mainly used and there is a lack of technical barriers.
2. Reliance on external cooperation and basic research and development:
The company has cooperative relations with many domestic universities (such as Dalian University of Technology and Zhejiang University), but the content of the cooperation is mostly concentrated on the basic research level, and no major technological breakthroughs or industrialization results have been disclosed.
The R&D team is mainly composed of undergraduates and above, but lacks industry leaders or doctoral research leaders, and has weak independent innovation capabilities.
3. Market positioning is low-end:
The products are mainly aimed at small and medium-sized enterprises, and the application areas are concentrated in traditional industries (such as daily chemicals and textile auxiliaries), and have not entered the field of high-end medical or electronic materials.
Although it is claimed that the products are exported to Europe, the United States, Japan and South Korea, no specific customer cases or market share data are provided, and the export scale may be limited.
VP/VA copolymer is common in personal care products, and many people have some questions about it. For example, some people worry whether it is harmful to hair. In fact, under normal use, it generally does not cause damage to hair and can also play a certain styling role.
Some people also wonder whether it is a silicone substance. VP/VA copolymer and silicone are different chemical components, and their properties and functions are also different.
Regarding whether it is safe, it is safe under the premise of complying with relevant standards and specifications, and is widely used in various cosmetics and personal care products.
Some people also want to know whether it is good for hair. VP/VA copolymer can form a protective film on the surface of hair, help reduce static electricity, and make hair smoother and easier to comb.
Q: Does VP/VA copolymer cause allergies?
A: Although most people will not be allergic to products containing this ingredient, some individuals may have allergic reactions due to physical differences. It is recommended to do an allergy test on a small area of skin before using new products.
Q: Can VP/VA copolymer be found in conditioners?
A: It is more used in styling products such as hair spray and mousse, and is relatively rare in conditioners.
Q: What role does VP/VA copolymer play in skin care products?
A: In skin care products, it can be used as a thickener and stabilizer to help adjust the product texture and make the formula more stable.
Q: Is VP/VA copolymer easy to wash off?
A: It can be washed off the hair and skin with normal shampooing, and there will be no large amount of residue.