Plastic products with high strength and flexibility
A plastic product and high-strength technology, applied in the field of plastic products, can solve the problems of unfavorable strength of melamine resin fibers and other issues
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Embodiment 1
[0111] 1.1 Preparation of melamine resin ether suitable for thermoplastic processing
[0112] In a 30-liter stirred autoclave, a melamine dispersion was prepared by adding 1.0 kg of melamine to 13.9 kg of methanol at 95°C, and after adjusting its pH to 5.9 with 10% HCl, 2.5 kg of 37% formaldehyde solution preheated to 60°C was added to the stirred autoclave, and the reaction mixture was reacted at a reaction temperature of 95°C for a reaction time of 20min.
[0113] After cooling to 65 °C, the pH value was adjusted to 9 by adding 10% sodium hydroxide solution, and then after adding 2.23 kg of butanol, the etherified melamine resin condensate dissolved in the water-methanol mixture was transferred to In the first vacuum evaporator, the etherified melamine resin condensate solution was concentrated at 82° C. to obtain a highly concentrated melamine resin solution with a solid content of 76% by weight and a butanol content of 8% by weight.
[0114] The highly concentrated etheri...
Embodiment 2
[0122] 2.1 Preparation of melamine resin ether suitable for thermoplastic processing
[0123] Prepare the melamine dispersion in a 30 L stirred autoclave by adding 1.0 kg of melamine to 15 kg of methanol at 95 °C, after adjusting its pH to 6.1, preheat 3.0 kg under pressure to 92 °C A 37% formaldehyde solution was added into a stirred autoclave, and the reaction mixture was reacted at a reaction temperature of 95° C. for a reaction time of 6 min.
[0124] After cooling to 65 °C, the pH value was adjusted to 9.2 by adding 10% sodium hydroxide solution, and then after adding 0.6 kg of butanol, the etherified melamine resin condensate dissolved in the water-methanol mixture was transferred to In the first vacuum evaporator, the etherified melamine resin condensate solution was concentrated at 80° C. to obtain a highly concentrated melamine resin solution with a solid content of 78% by weight and a butanol content of 3% by weight.
[0125] The highly concentrated etherified melam...
Embodiment 3
[0133] 3.1 Preparation of blends of thermoplastically processable melamine resin ethers and grafted ethylene polymers
[0134] In a 30-liter stirred autoclave, a melamine dispersion was prepared by adding 1.0 kg of melamine to 13.9 kg of methanol at 95 °C, and after adjusting its pH to 5.9 with 10% HCl, the 2.5 kg of 37% formaldehyde solution preheated to 60° C. was added to the stirred autoclave, and the reaction mixture was reacted at a reaction temperature of 95° C. for a reaction time of 20 minutes.
[0135] After cooling to 65 °C, the pH value was adjusted to 9 by adding 10% sodium hydroxide solution, and after adding 2.23 kg of butanol, the etherified melamine resin condensate dissolved in the water-methanol mixture was transferred to In the first vacuum evaporator, the etherified melamine resin condensate solution was concentrated at 82° C. to obtain a highly concentrated melamine resin solution with a solid content of 76% by weight and a butanol content of 8% by weight...
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