Development and Application of Water-soluble Polymer Powder

Since the 1970s, adhesives for building use in China have mostly used polyvinyl alcohol 107 glue. By the mid-1990s, some people used powder thickeners such as modified starch glue, modified cellulose and cooked rubber powder. Acts as an adhesive. With the advancement of science and technology, the level of industrial production is improving and environmental awareness is increasing. The practical application shows that the application of 107 glue in building materials is getting more and more serious, mainly 107 glue contains formaldehyde and other toxic substances; while the modified starch glue, modified cellulose and cooked rubber powder have low viscosity and are not water resistant. They are not suitable for use in the building materials industry and have been ordered to be eliminated. This provides a unique market opportunity for new technologies and new products for environmental protection.

1 Characteristics and main technical parameters of polymer water-soluble rubber powder

In order to meet the needs of the market, in many years of practice, we successfully developed a polymer water-soluble rubber powder. The product is a white powder that dissolves in cold water and forms a gel in a short period of time. Because the product is made of natural rubber compound and polymer material supplemented with auxiliary agent, it is non-toxic, harmless and non-radioactive. It also has good adhesion, thickening, leveling, moisturizing and extraordinary film formation. Water resistance, but also in the architectural coatings and related building materials products play anti-aging, anti-cracking effect.

2 Polymer production process of water-soluble rubber powder

2.1 The composition of polymer water-soluble rubber powder

Base material; natural agar, hydroxypropyl sesbania gum, inorganic gel, thickening powder, film forming agent (total 30% to 40%).

Filler: modified plant fiber powder, PVA-9 powder (total 60% to 70%).
Auxiliaries: water powder, wood fiber (appropriate amount).

Practice has proved that the polymer water-soluble rubber powder compounded by the above base materials, fillers and auxiliaries has good adhesiveness and good adhesion after being dissolved in cold water, resulting in a high performance. The glued body.

2.2 Production of Polymer Water-soluble Powders

The base materials, fillers and auxiliaries selected can reach the required number of meshes. No crushing, heating, and reaction are required during the production. Only a variety of materials are weighed in proportion and placed in a closed mixer. Mix evenly. It is pollution-free and energy-saving during production, convenient for storage and transportation, and can save a lot of manpower and material resources.

3 The application of polymer water-soluble rubber powder


(1) It can replace polyvinyl alcohol 107, 801, 803 series glue, modified starch glue, modified cellulose and cooked rubber powder, etc., used as adhesive, film former and leveling agent in architectural coatings and interior and exterior wall putties. Agent, moisturizer.

(2) It can replace expensive hydroxyethyl cellulose, hydroxypropyl cellulose and carboxymethyl cellulose at home and abroad. It has good compatibility, thickening, viscosity increasing and leveling in latex paints. , film formation, water resistance, and the cost is only 1/3 of the above products.

(3) It is used in cement mortar, cement tile, gypsum product, and waterproof material. It has properties such as viscosity increase, water retention, workability, workability, and firmness. Its performance is better than related products at home and abroad, and its price is lower.

(4) It can also replace scouring alkali, oxidized starch glue, polyvinyl formal glue and traditional culture glue for bonding carton, paper tube and paper. The ratio of the powder to the cold water is about 1:70 to 80, and the cost price per ton of liquid glue is only about 300 yuan t-1.

(5) For oil drilling, ceramics, pesticides, compound fertilizers, textiles, batteries, etc., and the cost is reduced by 1/2.
Powder adhesives have been widely used abroad. In recent years, the development of powdered waterborne adhesives in China has been rapid, and the application fields have also gradually expanded. Water-soluble polymer powder is non-toxic, harmless, non-alkaline, excellent in product performance, low in price, and widely used. It is in line with modern green environmental protection requirements and GB18583-2001 ("Restriction of harmful substances in interior decoration materials adhesives"), GB18582 -2001 ("Restriction of Harmful Substances in Interior Decoration Materials for Interior Wall Coatings"), a new generation of adhesives under the national mandatory standards.

Source: 21st Century Fine Chemicals Network