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Title:
LIGHT COLOR MODIFIED ISOCYANATE MIXTURE AND PREPARATION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2019/076099
Kind Code:
A1
Abstract:
Disclosed are a light color modified isocyanate mixture and a preparation method therefor. The method comprises the following steps: a) reacting isocyanate groups of a raw material isocyanate under the action of a phosphorus heterocyclic catalyst, and finally obtaining a modified isocyanate reaction liquid containing carbodiimide and/or uretonimine derivatives; and b) adding halosilane organics and a sulfonic anhydride-compounded terminating agent to the reaction liquid obtained in step a so as to terminate the reaction of carbodiimidization. The modified isocyanate prepared by the method has the characteristics of a liquid state at room temperature, being stable in storage at room temperature and high temperature, and low color number.

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Inventors:
ZHOU YE (CN)
WANG WENBO (CN)
XIA YILU (CN)
ZHANG HONGKE (CN)
LIU XIAOGAO (CN)
NIU GUIYING (CN)
WANG HUIHUI (CN)
LIU XUETING (CN)
Application Number:
PCT/CN2018/098253
Publication Date:
April 25, 2019
Filing Date:
August 02, 2018
Export Citation:
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Assignee:
WANHUA CHEMICAL GROUP CO LTD (CN)
International Classes:
C07C263/18; C07C265/14; C07C267/00; C07D229/00
Domestic Patent References:
WO2007006622A12007-01-18
WO2007076998A12007-07-12
WO2008009669A12008-01-24
Foreign References:
CN107879951A2018-04-06
CN102718683A2012-10-10
CN1721395A2006-01-18
US4088665A1978-05-09
CN1502605A2004-06-09
CN102858747A2013-01-02
CN102964566A2013-03-13
US20050282993A12005-12-22
CN101003496A2007-07-25
CN1789241A2006-06-21
CN101553517A2009-10-07
US6120699A2000-09-19
US2853473A1958-09-23
EP0515933A21992-12-02
CN1721395A2006-01-18
US4120884A1978-10-17
CN1789241A2006-06-21
CN102718683A2012-10-10
US2663737A1953-12-22
Other References:
See also references of EP 3699169A4
Attorney, Agent or Firm:
BOSS & YOUNG PATENT AND TRADEMARK LAW OFFICE (CN)
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