Polymer sulfur coated controlled release fertilizer and preparing method thereof

• Main Authors: LYU YUNFENG, LYU RUIZHE, CAO YUQING
• Format: Patent
• Language: Chinese; English
• Published: 11.01.2017
• Subjects: CHEMISTRY; FERTILISERS; FERTILISERS CHARACTERISED BY THEIR FORM; FERTILISERS PRODUCING CARBON DIOXIDE; INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; MANUFACTURE THEREOF; METALLURGY; MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENTSUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVINGA SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES,SOIL-CONDITIONERS, WETTING AGENTS; NITROGENOUS FERTILISERS

The invention discloses a polymer sulfur coated slow-release fertilizer and a manufacturing method thereof, first of all, implement granulated fertilizer coating through melting urea, next, reaction of two or above polymer precursors on the surface of granulated fertilizer coated with urine will be achieved to form polymer wrapper, after that, coat the polymer wrapper with modified molten sulfur, and the outermost layer coating is with naturally modified polymer wax combination, which greatly reduces coating materials dosage, improves controlled release properties and nutrient content, the product toughness, abrasive resistance and impact resistance is favorable, low comprehensive cost, membrane materials can be degraded, and of eco-environment protection. 本发明公开种聚合物硫包衣缓释肥料及制造方法，首先颗粒肥料经过熔融尿液进行涂覆，其次，由两种或以上聚合物前体在涂有尿液的颗粒肥料表面反应形成聚合物包裹层，再次，使用经改性的熔融硫对聚合物包裹层进行涂覆，最外层用天然改性聚合蜡组合物进行涂覆，大大减少包裹材料用量，提高控释性能，提高养分含量，产品韧性、耐磨性及抗冲击性好，综合成本低，膜材可降解，生态环保。