On May 21, 2026, information from the State Intellectual Property Office showed that Keshun Waterproof Technology Co., Ltd. successfully applied for a patent called “Polymer Asphalt Composite Waterproof Membrane and Preparation Method”. The authorization announcement number is CN120941849B, and the authorization announcement date is May 19, 2026.
The application publication number is CN120941849A, the application number is CN202511141877.7, the application publication date is May 19, 2026, and the application date is August 14, 2025.
The following are related patent pictures:
The patent summary shows that the waterproofing membrane includes an asphalt self-adhesive waterproofing layer, an oil impermeable layer and a polymer waterproofing layer.
The oil anti-seepage layer is arranged on one of the two sides of the asphalt self-adhesive waterproof layer that is opposite to it along its thickness direction, and the polymer waterproof layer is arranged on the side of the oil anti-seepage layer that is away from the asphalt self-adhesive waterproof layer.
Furthermore, the oil impermeable layer includes two or more osmotic pressure gradient layers provided between the asphalt self-adhesive waterproof layer and the polymer waterproof layer.
Through such a structural design, the oil anti-seepage layer forms a multi-layer gradient of osmotic pressure in the direction of oil migration. The change in osmotic pressure is used to prevent oil from migrating from the asphalt self-adhesive waterproof layer to the polymer waterproof layer, thus preventing the yellowing and performance changes of the polymer waterproof layer, making the waterproof membrane have good waterproofing effect and service life.
Keshun Co., Ltd. was established on October 10, 1996 and listed on the Shenzhen Stock Exchange on January 25, 2018. Its registered address and office address are both in Foshan City, Guangdong Province.
As a leading domestic supplier of new building waterproofing materials, the company has the advantages of the entire industry chain, and its products and services are well recognized by the market.
The main business of Keshun Co., Ltd. is the research and development, production and sales of new building waterproof materials and the provision of waterproof engineering construction services. The Shenwan industry it belongs to is building materials – decoration and building materials – waterproof materials. The concept sectors it belongs to include science and technology enterprises with equal shares and equal rights, small-cap balance, and new materials.
In 2025, Keshun Co., Ltd. will achieve operating income of 6.044 billion yuan, ranking second among three companies in the industry.
Oriental Yuhong, which ranks first in the industry, has revenue of 27.579 billion yuan, the industry average is 12.011 billion yuan, and the median is 6.044 billion yuan.
Among its main businesses, waterproofing membrane revenue is 3.072 billion yuan, accounting for 50.82%; waterproof coating revenue is 1.588 billion yuan, accounting for 26.27%.
In terms of net profit, it will be -548 million yuan in 2025, ranking third in the industry. The first in the industry, Karen Shares, has a net profit of 38.475 million yuan, and the second place, Oriental Yuhong, has a net profit of 37.9821 million yuan. The industry average is -157 million yuan, and the median is 37.9821 million yuan.
The following is another related patent picture:
Keshun Waterproof Technology Co., Ltd. has many patents recently.
From invention patents to utility model patents, a variety of materials and processes are involved.
For example, invention patents such as “A conductive waterproofing membrane and its preparation method and application”, “Composition for polyurethane composite glue, polyurethane composite glue and its application”, as well as utility model patents such as “Tired waterproofing membrane forming equipment” and “Roof skylight waterproof structure”.
These patents cover many aspects such as waterproofing membranes, coatings, and construction techniques, fully demonstrating Keshun’s innovative capabilities and technical strength in the field of waterproofing materials.
