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Lignin-based block copolymerization molecular-grade combined polyether, preparation method thereof and application of lignin-based block copolymerization molecular-grade combined polyether in preparation of polyurethane flexible foam material

A technology for block copolymerization and combination of polyethers is applied in the fields of its preparation, lignin-based block copolymerization of molecular-level combined polyethers, the preparation of polyurethane soft foam materials, and the preparation of combined polyethers, which can solve the structure of polyurethane soft-hard copolymerization. Can not fully meet the requirements and other issues

Inactive Publication Date: 2020-09-15
GLORY HOME FURNISHING JIAXING
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Problems solved by technology

[0004] Nevertheless, in special application fields, the soft and hard copolymer structure of polyurethane still cannot fully meet the requirements.

Method used

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  • Lignin-based block copolymerization molecular-grade combined polyether, preparation method thereof and application of lignin-based block copolymerization molecular-grade combined polyether in preparation of polyurethane flexible foam material
  • Lignin-based block copolymerization molecular-grade combined polyether, preparation method thereof and application of lignin-based block copolymerization molecular-grade combined polyether in preparation of polyurethane flexible foam material
  • Lignin-based block copolymerization molecular-grade combined polyether, preparation method thereof and application of lignin-based block copolymerization molecular-grade combined polyether in preparation of polyurethane flexible foam material

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preparation example Construction

[0036] The core of the present invention is to provide a method for preparing a lignin-based block copolymerized molecular-level combination polyether, which is called Embodiment 1. The process flow diagram is shown in figure 1 , the method includes the following steps:

[0037] 1) Pretreatment of lignosulfonate:

[0038] Lignosulfonate and pretreatment reagent are mixed at a weight ratio of 1:2-10 at a temperature of 100-140 Pretreatment for 60-240 minutes at a pressure of 10-15MPa;

[0039] 2) Remove the pretreatment reagent:

[0040] The lignosulfonate obtained after the pretreatment is sloughed off the pretreatment reagent through vacuum distillation;

[0041] 3) Soft and hard copolymerization of lignosulfonate and polyether polyol:

[0042] Lignosulfonate and polyether polyol are copolymerized at a weight ratio of 1:1-5, and the copolymerization temperature is 120-180 The time is 1-4 hours, and the lignin-based block copolymerized molecular-level combination polyet...

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Abstract

The invention relates to lignin-based block copolymerization molecular-grade combined polyether, a preparation method thereof and application of the lignin-based block copolymerization molecular-gradecombined polyether in preparation of a polyurethane flexible foam material. According to the lignin-based block copolymerization molecular-grade combined polyether, lignosulfonate is used as a base material of the lignin-based block copolymerization molecular-grade combined polyether; the molecular chain of the lignin is cut off and embedded into the lignin by utilizing the solvation effect of the polyether polyol to form the molecular-grade combined polyether formed by co-polymerizing the aromatic polymer segment of the lignin and the aliphatic polymer segment of the polyether polyol. According to the preparation method, a molecular blending technology with a special structure is adopted, lignin molecular fragments of a microscopic hard segment and polymer polyol of a macroscopic soft segment are edited and spliced again, and the molecular-grade combined polyether is obtained through a block copolymerization method. The molecular combined polyether has the dual characteristics of strong support and softness, and perfectly solves the problem that the strong support and the softness of the polyurethane flexible foam material cannot be considered at the same time.

Description

technical field [0001] The invention relates to a preparation method of a combined polyether, in particular to a lignin-based block copolymerized molecular-level combined polyether, its preparation method and its application in the preparation of polyurethane soft foam materials, belonging to the technical field of polyurethane soft foam production . Background technique [0002] Lignin is a large class of natural polymers and the only aromatic natural polymer in nature, which plays a strong supporting role in the structure of plants. Lignosulfonate is the main waste in the paper industry, and its comprehensive utilization has always been a topic with great social and economic benefits. However, lignosulfonate is extremely difficult to degrade and process due to its special aromatic basic structural unit and strong bond energy. [0003] A large class of raw materials in the polyurethane industry are substances with active hydrogen, such as polyether polyols, polyester poly...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G81/00C08G18/64C08G101/00C09K23/50
CPCC08G81/00C08G18/6492
Inventor 邓泽华张雷丘国豪国海玲郑迁
Owner GLORY HOME FURNISHING JIAXING
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