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Organic silicon paint crosslinking agent
2017-7-16 17:21:03
Organic silicon paint crosslinking agent
By controlling the organic silicone coating formula of organic silicon coating of crosslinking agent and silane coupling agent content, study their elastic modulus, hardness of coating materials, hydrophobicity, and the effect of water absorption and water immersion resistant performance.
Results show that when the organic silicon coating after crosslinking agent content is more than 4%, with the increase of organosilicon coating content of crosslinking agent, coating the elastic modulus decreased, shaw hardness increases, bibulous rate is increasing; The content of silane coupling agent increased, and the elastic modulus and water absorption rate of organic silicon coating increased, while shao's hardness and water contact Angle decreased.
The elastic modulus of the coating is the most sensitive to seawater immersion. The stability of organic silicon coating with 5% crosslinking agent and 8% silane coupling agent was significantly reduced in seawater.
Excessive crosslinking agent can increase the crosslinking degree of the silica oxygen chain, and the mesh structure becomes dense, increasing the hardness of the coating, which is not conducive to the anti-fouling performance of the coating. The addition of high silane coupling agent can lead to the increase of hydrophilic groups on the surface of the coating, decreasing water contact Angle and increasing adhesion of Marine bacteria.
7628 glass cloth was treated with gel solution through coupling agent, preloading is 155. Bake in the oven for 5min, then fold the above half crosslinked glass cloth neatly into the heat press with the vacuum device, and the crosslinking condition is 180. / 60 min; Chill the die and test the plate performance.
By testing the changes of gelation time and DSC scanning analysis, it can be seen that the DDM activity is the highest in the aromatic amine crosslinking agent, and the storage stability is the worst. DDS has the worst activity, the corresponding storage stability is better, but the crosslinking temperature is higher, 160? Under conditions, 2h cannot be fully cross-linked, requiring higher cross-linking conditions; Ethacure100 crosslinking agent is easy to use and has low viscosity, but the structure is asymmetrical and the dielectric property of crosslinking is decreased.
MOCA crosslinking agent has good solubility, latent and electrical properties. It can be used in resin casting mould plastic and laminate products. Ethacure100 crosslinking agent is a liquid at normal temperature and has good compatibility with other resins and has a good latent property. Therefore, it is expected to be widely used in the copper-clad industry.
With MES and TMPTA under the catalysis of Et3N, through a simple step, much branched poly thiol/E - 51 TGA curves of the crosslinked product should be synthesized with hyperbranched structure of thiol mercaptan, at the end of the epoxy crosslinking agent at room temperature.
Chinese name: Diethyl toluene diamine(DETDA)
Physical and chemical properties: light yellow transparent liquid, slightly soluble in water, soluble in alcohols, ethers, ketones and other polar organic solvents, and polyether, polyester polyol compatibility.
Density 1.022
Viscosity (20 ℃) ??mPa·ss290±10
Pour Point ℃-9
Boiling point of310°C
Chinese name: Diethyl toluene diamine(DETDA)
Physical and chemical properties: light yellow transparent liquid, slightly soluble in water, soluble in alcohols, ethers, ketones and other polar organic solvents, and polyether, polyester polyol compatibility.
Density 1.022
Viscosity (20 ℃) ??mPa·ss290±10
Pour Point ℃-9
Boiling point of310°C
Flash Point°C161.1°C
Use the RT - IR tracking much branched poly (mercaptan/E - 51 / Et3N crosslinking process at room temperature, compared with the traditional room temperature cross-linking agent, crosslinking before the system faster, 80 min thiol and epoxy conversion rate can reach 48% and 48% respectively. 3) TGA results showed that crosslinked products had high thermal stability and the initial decomposition temperature was 322 degrees Celsius.
Based on GB/t7124-2008, the tensile speed: 10mm/min, tensile shear strength was 8.9 MPa.
Polyester paints are mainly made of polyester resin. High-grade furniture is commonly used as unsaturated polyester paint, which is also known as the piano lacquer; The characteristics of unsaturated polyester paint are: a construction film thickness can be up to 1mm, which is unmatched by other paints; The paint film is plump, clear and transparent, its hardness and gloss are higher than other kinds of paint. Water resistance, heat resistance and short - time resistance to light flame performance better than other paints; The flexibility of unsaturated polyester lacquer is poor, the force is easy to crack easily, once the film damage is not easy to repair, it is important to protect the furniture when moving.
Polyurethane paint film is hard and wear-resistant, it has a high gloss after polishing. It is good for water resistance, heat resistance and acid resistance. It is a high quality wood for high quality wood.
Acrylic paint is a coating made from the copolymer of methacrylate and acrylate, which contains white varnish and white enamel with white color. Acrylic lacquer film is bright and hard, with good color protection and light protection. Water resistant, adhesion good, polished and polished paint film is smooth as mirror, and can be permanent.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
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