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Application number: CN201611259612.8 Application date: December 30, 2016
Publication Number: CN106832383A Publication Date: June 13, 2017
[Applicant] Dongguan Jiaqian New Material Technology Co., Ltd. [Address] 2nd Floor, Building 11, Innovation Technology Park, Songshan Lake High-tech Industrial Development Zone, Dongguan City, Guangdong Province 523000
[Inventor] Wang Haiyan
[Patent Agency] Beijing Zhonghe Chengcheng Intellectual Property Agency Co., Ltd. 11246 [Agent] Lian Ping
[Country and Province Code] 44
[Abstract] The present invention discloses a method for preparing formaldehyde-free flame-retardant composite artificial board, comprising the following steps: first, preparing a water-resistant adhesive; dicing and crushing raw pomelo peel; sun-drying and crushing crop straw; mixing pomelo peel particles, crop straw particles, phenolic resin powder, water-resistant adhesive, and perlite powder; paving the mixture in a mold; hot pressing at 140-150°C and 3-6 MPa for 5-11 minutes; and releasing the pressure; then hot pressing at 170-180°C and 7-9 MPa for 8-13 minutes, followed by cooling and pressure relief to obtain an artificial board blank; then soaking the artificial board blank in a tea polyphenol aqueous solution, ultrasonically treating the blank at normal pressure, removing the blank and aging it; and finally hot pressing at 185-200°C and 9-10 MPa for 2-5 minutes, followed by pressure relief and cooling to obtain the composite artificial board. The composite artificial board produced by the present invention has high compressive strength, good impact resistance, no free formaldehyde release, good flame retardancy, and low production cost.
[Sovereign Item] A method for preparing formaldehyde-free flame-retardant composite artificial board, characterized in that it comprises the following steps: (1) Preparation of adhesive a) reacting 100#150 parts of isocyanate and 50#75 parts of polyester polyol at 65°C for 1#2h, heating to 80#85°C, and keeping warm for 1#2h to prepare polyurethane prepolymer; b) adding 30#45 parts of hydrophilic chain extender to the polyurethane prepolymer prepared above, carrying out chain extension reaction at 60#70°C for 2#4h, then adding 10#15 parts of small molecule diol chain extender, heating to 80# 85 ℃ reaction for 2#4h, then cool to 50 ℃, add 20#30 parts of neutralizer for neutralization, keep warm, add deionized water for emulsification for 5#10min at a speed of 1000#1200r/min to obtain a polyurethane aqueous prepolymer emulsion; c) add 50#110 parts of degraded collagen solution to the above-prepared polyurethane aqueous prepolymer emulsion while stirring at a speed of 300#500r/min, then continue stirring at a speed of 150#200r/min, heat to 65 ℃, keep warm for 1#2h, and then cool to 5 0℃, vacuum remove volatiles under negative pressure to obtain a water-resistant adhesive; (2) dice and crush the raw pomelo peel, then process it in a dryer to obtain granular pomelo peel, place it in a dryer to dry, and use a vibrating square hole sieve to separate pomelo peel particles with a pore size of 2.5 to 10 mm. Dry the crop straw and crush it into 3#6mm particles; (3) according to weight, mix 20#40 parts of pomelo peel particles, 35#66 parts of crop straw particles, 5#8 parts of phenolic resin powder, 1#3 parts of water-resistant adhesive, and 0.5#1.5 parts of perlite powder, and stir them evenly. Lay it in a mold, hot press it at 140#150℃ and 3#6MPa for 5#11min, and release the pressure; then heat it to 170#180℃ at a heating rate of 5#12℃/min, hot press it at 7#9MPa for 8#13min, release the pressure and cool it to obtain an artificial board blank; (4) soak the above artificial board blank in a tea polyphenol aqueous solution, ultrasonically treat it at normal pressure for 30#60min, take it out and age it for 2#3h; then hot press it at 185#200℃ and 9#10MPa for 2#5min, release the pressure and cool it to obtain a composite artificial board.