Title:
POLY/MONO-HYPOPHOSPHITE HYDROGEN DIPHOSPHITE COMPOUND, AND PREPARATION AND USE THEREOF
Document Type and Number:
WIPO Patent Application WO/2022/077813
Kind Code:
A1
Abstract:
A poly/mono-hypophosphite hydrogen diphosphite compound, and the preparation and use thereof. The structural formula of the compound is shown in formula (I) as follows, wherein x is an integer of 1-6, n, y and p are integers of 1-4, and M is Ca, Mg, Al, Zn, Fe, Sn or Ti. The preparation method comprises: dissolving phosphorous acid and hydrophosphite in water, then adding concentrated phosphoric acid at 80-90ºC for reaction, drying moisture at a low temperature, and dehydrating same at a high temperature for reaction, washing and drying same. The compound has the advantages of a very high thermal decomposition temperature, a high phosphorus content, a good flame retardant property, a synergistic effect with diethyl aluminum hypophosphite, a low water absorptivity and a low acidity, and can be used as a halogen-free flame retardant component of a high polymer material.
Inventors:
LEI HUA (CN)
LI JINZHONG (CN)
LI JINZHONG (CN)
Application Number:
PCT/CN2021/075177
Publication Date:
April 21, 2022
Filing Date:
February 04, 2021
Export Citation:
Assignee:
JIANGSU LISIDE NEW MAT CO LTD (CN)
UNIV ZHEJIANG (CN)
UNIV ZHEJIANG (CN)
International Classes:
C01B25/38; C01B25/40; C08K3/32; C08L67/00; C09D5/18; C09K21/04; D06M11/70; D06M101/06
Foreign References:
| CN112093786A | 2020-12-18 | |||
| CN104114485A | 2014-10-22 | |||
| CN109467751A | 2019-03-15 | |||
| CN111116988A | 2020-05-08 | |||
| CN109181293A | 2019-01-11 | |||
| CN1546371A | 2004-11-17 | |||
| GB665174A | 1952-01-16 | |||
| US3310503A | 1967-03-21 | |||
| CN107936297A | 2018-04-20 | |||
| CN107760023A | 2018-03-06 |
Other References:
See also references of EP 4011827A4
Attorney, Agent or Firm:
HANGZHOU TIANQIN INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)
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