BIO-BASED POLYOL FOR POLYURETHANE, COATING LIQUID AND COATED CONTROLLED RELEASE FERTILIZER THEREOF

WIPO Patent Application WO/2023/109674

A1

Disclosed in the present invention are a bio-based polyol, a coating liquid, a coated controlled release fertilizer and a preparation method. The bio-based polyol is prepared according to the following method: adding biomass, a liquefying agent, a co-liquefying agent and an acidic catalyst according to a mass ratio of 100:100-500:1-10:2-15 into a reaction kettle for undergoing a reaction, cooling to 100°C or below by using an ice water bath after the reaction is finished, and collecting a supernatant. The coating liquid comprises the following raw materials: the bio-based polyol, an alkaline catalyst, other polyols and an auxiliary agent. The coated controlled release fertilizer is composed of a core and a membrane shell, wherein the core is a fertilizer particle, the membrane shell is formed by the coating liquid and a curing agent undergoing a solvent-free in-situ reaction, and the mass of the membrane shell is 2-8% of the mass of the coated controlled release fertilizer.

WO/2005/070998	POLYMER FOR USE IN CONDUITS AND MEDICAL DEVICES
JPS6241214	ROOM TEMPERATURE CURABLE COMPOSITION, ITS PRODUCTION AND ITSUSE FOR PRODUCING POLYURETHANE

LI LIXIA (CN)
PANG MINHUI (CN)
LIU DONGSHENG (CN)
ZOU GUOYUAN (CN)
ZHAO TONGKE (CN)
LI HONGYAN (CN)
DONG SHUQI (CN)
LIANG LINA (CN)
GU JIALIN (CN)

PCT/CN2022/137924

June 22, 2023

December 09, 2022

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BEIJING ACAD AGRIC & FORESTRY (CN)

C08G18/64; C05G3/40; C05G5/30; C08B15/00; C08H7/00

CN110590449A	2019-12-20
CN107266689A	2017-10-20
CN105646090A	2016-06-08
CN113004105A	2021-06-22
CN108516899A	2018-09-11

JEEKAI&PARTNERS (CN)

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