小西化学工業 List of Products and Services

Microparticles can be deployed in various applications in a dispersed state, but they have a tendency to re-agglomerate due to interactions between the microparticles. Inorganic microparticles are hydrophilic, which allows them to interact strongly with the hydroxyl groups of water-soluble phenolic resins. Additionally, the electrostatic repulsion between the sulfonic acid groups of the water-soluble phenolic resins enables the dispersed microparticles to remain stable and dispersed in the aqueous solution for an extended period without re-agglomerating. *Please feel free to download detailed materials or contact us for inquiries.*

• others

Our water-soluble phenolic resin demonstrates high robustness due to the hydrogen bonding strength between the hydroxyl groups of DHDPS and the carbonyl or amino groups of the aromatic polyamide film, in addition to crosslinking using the methylol groups at the ends of the resol-type water-soluble phenolic resin. After chlorination of the aromatic polyamide film, surface treatment with water-soluble phenolic resin allows the resin to adhere to the film, improving the blocking rate of hardness components in water. *Please feel free to download the catalog or contact us for more information.

• others

Our water-soluble phenolic resin demonstrates high adhesion even to substrates without bonding agents, such as polyester and cellulose. In addition to the hydrogen bonding strength between the hydroxyl groups of DHDPS and the carbonyl or hydroxyl groups of the substrate, the crosslinking (thermosetting) utilizing the methylol groups at the ends of the resol-type water-soluble phenolic resin results in high robustness. After surface treatment with the water-soluble phenolic resin, if a substance with antibacterial properties (such as amine hydrochloride) is supported, the strong interaction between the antibacterial agent and the water-soluble phenolic resin can impart excellent wash durability and antibacterial properties to textile products. *Please feel free to download detailed materials or contact us for more information.

• others

We would like to introduce "binder for cationic substances" as an example of the applications of water-soluble phenolic resin from Konishi Chemical Industry Co., Ltd. We have found that water-soluble phenolic resins exhibit high adhesion even to substrates without bonding groups, such as polyester and cellulose. In addition to the hydrogen bonding strength between the hydroxyl groups of DHDPS and the carbonyl or hydroxyl groups of the substrate, the crosslinking (thermosetting) utilizing the methylol groups at the ends of resol-type water-soluble phenolic resin demonstrates high robustness. 【Features】 - Optimization of the molar ratio and molecular weight of DHDPS and sulfonic compounds - High adhesion to substrates without bonding groups - High robustness *For more details, please refer to the PDF materials or feel free to contact us.

• others

As an example of the applications of our water-soluble phenolic resin, we would like to introduce the "Nylon Fixing Agent." Our water-soluble phenolic resin is a resol resin made from dihydroxydiphenyl sulfone (DHDPS) and phenol sulfonic acid. DHDPS has an electron-withdrawing sulfonyl group at its center, which gives it a much stronger hydrogen bonding capability at both ends compared to ordinary compounds like phenol, cresol, or tannic acid, allowing it to form strong hydrogen bonds with the azo groups of acid dyes. By utilizing the ionic bonding strength between the terminal amino groups of nylon fibers and the sulfonic acid groups of the water-soluble phenolic resin, as well as the hydrogen bonding strength between the azo groups of acid dyes and the hydroxyl groups of the water-soluble phenolic resin, we can fix the dye to the fibers. *For more details, please refer to the PDF materials or feel free to contact us.*

• others

"Polysilsesquioxane (PSQ)" is a thermosetting silicone resin synthesized from trifunctional organosilane compounds. It is a silicon-based organic-inorganic hybrid material with high heat resistance, high hardness, and transparency, and its unit structures come in three types depending on the number of siloxane bonds. We have developed an industrial manufacturing method that precisely controls the molecular weight of PSQ and the ratio of unit structures (T3 structure ratio) within a certain range. We design and customize the structure to meet the desired physical properties and usage conditions of our customers. 【Features】 ■ Thermosetting silicone resin synthesized from trifunctional organosilane compounds ■ Silicon-based organic-inorganic hybrid material with high heat resistance, high hardness, and transparency ■ Three types of unit structures depending on the number of siloxane bonds ■ Developed an industrial manufacturing method to precisely control the molecular weight of PSQ and the ratio of unit structures within a certain range ■ Design and customize the structure to meet the desired physical properties and usage conditions of our customers *For more details, please refer to the PDF document or feel free to contact us.

• others

"Polysilsesquioxane (PSQ)" is a high-performance resin composed of siloxane bonds (Si-O-Si) synthesized from tri-functional organosilane compounds. It exhibits high light transmittance in the visible light range and has the characteristic of being resistant to degradation even under long-term light exposure conditions. 【Features】 ■ High heat resistance ■ High light resistance ■ Transparency ■ High hardness ■ Low refractive index ■ Low dielectric constant *For more details, please refer to the PDF document or feel free to contact us.

• others

This document is a list of development plant equipment from Konishi Chemical Industry. It includes detailed information on equipment numbers, materials, capacities (L), wing shapes, temperatures (°C), and pressures (MPa) for the new pilot plant that started operation in 2018: 4PEX (the second development plant), as well as the first development plant and the medium experiment (former development plant). Please download the catalog and take a look. [Contents] ■ 4PEX (Second Development Plant) ■ First Development Plant ■ Medium Experiment (Former Development Plant) *For more details, please refer to the PDF document or feel free to contact us.

• others

Our company offers a seamless product development process that integrates research and development with production technology, from the laboratory examination stage to industrialization involving investment, through R&D.E (Engineering). 【Konishi Chemical Industry's Contract System】 Based on our design and development management regulations, we implement a development method (concurrent engineering) that optimizes the entire development process up to mass production by advancing various tasks simultaneously from the lab to industrialization. Design and Development Management Regulations ◎ Cross-organizational information sharing at each stage, including design, prototyping, and production. ◎ At each stage, discussions on regulations, hazards, environment, quality, and commercialization are conducted, with management decisions being involved earlier. ◎ Tasks are advanced in parallel without waiting for the completion of the previous stage. ◎ Insights from later stages are fed back to earlier processes to resolve issues in advance. We achieve a balance of meticulous work without omissions and high efficiency (shortening processes, reducing costs), resulting in reliable product development. We anticipate and address challenges that our customers may face in the future. *For more details, please refer to the PDF materials or feel free to contact us.

• others

Vanadium-based redox flow batteries (RFBs) are expected to be promising as large secondary batteries due to their excellent charge-discharge cycle durability and safety. Currently, the electrolyte membrane material commonly used is perfluorocarbon sulfonic acid polymer, but its high cost is believed to hinder widespread practical application. Hydrocarbon-based materials with sulfonic acid groups introduced into aromatic polymers are being investigated. Our company has produced a dense membrane of S-PES and evaluated its performance as an electrolyte membrane for RFBs. As a result, the membrane durability was found to be as strong as that of perfluorocarbon membranes, and the crossover (proton selectivity) showed approximately five times better results compared to perfluorocarbon membranes. *For more details, please refer to the PDF document or feel free to contact us.*

• Other resource recycling

A membrane was fabricated by blending sulfonated polyether sulfone (S-PES) with polyether sulfone (PES), and its performance as a water treatment membrane was evaluated. To confirm the effect of sulfonation on membrane hydrophilicity, model foulants (alginate, humic acid, bovine serum albumin) were supplied to a hollow fiber membrane module. As a result, the S-PES/PES blend membrane showed a smaller reduction rate in water permeability compared to the PES membrane, making it less prone to fouling. *For more details, please refer to the PDF document or feel free to contact us.*

• others

KONISHI Chemical Industry Co., Ltd. has developed sulfonated polyether sulfone 'S-PES' by sulfonating polyether sulfone (PES). The sulfonic acid group exhibits ion exchange capacity and hydrophilicity, imparting new functions to existing polymer compounds. A novel sulfonation method for aromatic polymers has been developed, successfully achieving a high sulfonic acid group introduction rate while preventing a decrease in molecular weight. (Patent No. 5824734) 【Quality Example】 ■ Appearance: Light brown powder ■ Sulfonic acid group introduction rate: 30% ■ Weight average molecular weight: 130,000 ■ Moisture: ≦3% ■ Development stage: Pilot results available *For more details, please refer to the PDF document or feel free to contact us.

• others

Our flagship product, "4,4’-Dihydroxy diphenyl sulfone (DHDPS)," has an electron-withdrawing sulfonyl group at its center, which gives the hydroxyl groups at both ends a very strong hydrogen bonding capability compared to ordinary compounds like phenol, cresol, and tannic acid. Focusing on the characteristics of "DHDPS," we have developed various anionic water-soluble resins by copolymerizing it with sulfonic acid compounds. We expect it to be applied in many uses as an anionic surface treatment agent with excellent adhesion to substrates. 【Product Lineup (Partial)】 ■DHDPS/Phenolsulfonic acid resin (Mass-produced) ■Phenolsulfonic acid resin-R (Laboratory product) ■Phenolsulfonic acid resin-N (Laboratory product) ■DHDPS resin (Laboratory product) *For more details, please refer to the PDF document or feel free to contact us.

• others