SEIWA KASEI is R&D oriented company, as a matter of fact, over 50% of our employees are working in R&D section. We have undertaken the research and development of hydrolysate of protein. Based on many years of original know-how, we promptly deal with a wide variety of needs.

Since its founding in 1958, SEIWA KASEI has developed and provided functional materials for cosmetics and personal care products. Promois, which is peptide or its derivative, is made from all natural proteins, and it is the product that is made with hope for gharmonyh with mother nature. SEIWA KASEI commits to contribute to the improvement of quality of life and environmental protection which are also the aim of REACH regulation. For more details, please refer to ‘Status of Promois under the REACH regulation‘.

Promois®

“Promois” is a long selling product line of SEIWA KASEI, hydrolyzed protein and its derivatives originated from various resources such as collagen, keratin, silk, milk, pearl, soy, wheat, rice and sesame. Promois is characterized by its various derivatives such as quarternized, acylated, esterified and siliconized type. The wide range of our manufacturing expertise is patented worldwide and we have many applicable patents as well. We are proud of SEIWA KASEI as a sole company in the world which deals in all these protein derivatives and our creative technique is attractive to other various fields.
go to page for Promois

Ayacol®

“Ayacol” is glycerides and ester oil of glycerol or diglycerol with fatty acid.
go to for page for Ayacol

Matlube®

“Matlube” is low-viscosity ester oil. It produces softness and smoothness on skin. When Matlube is contained in a formulation, it enhances spreadability and functions to improve texture.
go to page for Matlube

Silasoma®

“Silasoma” is water dispersion of microcapsule containing UV filter. The microcapsule is new material of silicone system, silicone resin polypeptide, which we completed in 1997. It had been difficult to produce microcapsules with the material of silicone system in the past. However, we have succeeded to enable to have microcapsules by silicone resin polypeptide which is hybrid polymer consists of hydrolyzed protein and silicone. Since “Silasoma” consists of a hybrid of Hydrolyzed protein with remarkable affinity for hair and skin, and silicone with harmlessness, its innovative multi-functionality generates great possibility of a wide range of application for DDS(Drug Deliver System).
go to page for SILASOMA

PROTESIL®

By fusion technology of polypeptide and silicone, “PROTESIL” has been developed. Thanks for excellent adsorption to hair and skin, “PROTESIL” has various effects such as repairing and moisturizing.
go to page for PROTESIL

VISTANOL®

“VISTANOL” is characterized in that it has remarkable stability with very low peroxide value over time and it is highly superior in skin tolerance.
go to page for VISTANOL

Other

Preservative mixture, Amino acid mixture
go to page for Other