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Strong-support high-elasticity polyurethane flexible foam material and preparation method thereof

A technology of polyurethane soft foam and high elasticity, which is applied in the field of polyurethane soft foam material, strong support and high elasticity polyurethane soft foam material and its preparation, and can solve problems such as difficult balance, contradiction between softness and support

Inactive Publication Date: 2020-07-24
GLORY HOME FURNISHING JIAXING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, softness and support are contradictory to each other, and it is difficult to balance

Method used

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  • Strong-support high-elasticity polyurethane flexible foam material and preparation method thereof
  • Strong-support high-elasticity polyurethane flexible foam material and preparation method thereof
  • Strong-support high-elasticity polyurethane flexible foam material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Example 1 Preparation of Lignin-Based Block Copolymer Molecular-Level Combined Polyether

[0034] A method for preparing lignin-based block copolymerized molecular-level combined polyether, the process flow diagram is shown in figure 1 , the method includes the following steps:

[0035] 1) Pretreatment of lignosulfonate:

[0036] Lignosulfonate and pretreatment reagent are mixed in a weight ratio of 1:2-10, and pretreated for 60-240 minutes at a temperature of 100-140°C and a pressure of 10-15MPa;

[0037] 2) Remove the pretreatment reagent:

[0038] The lignosulfonate obtained after the pretreatment is sloughed off the pretreatment reagent through vacuum distillation;

[0039] 3) Soft and hard copolymerization of lignosulfonate and polyether polyol:

[0040] Lignosulfonate and polyether polyols are copolymerized at a weight ratio of 1:1-5, the copolymerization temperature is 120-180°C, and the time is 1-4 hours. After the reaction is completed, a lignin-based block...

Embodiment 8-10

[0057] A method for preparing a strongly supported and highly elastic flexible polyurethane foam material. The method uses the lignin-based block copolymerized molecular-level combined polyether prepared in Example 7 as a raw material. The raw material formula of the polyurethane flexible foam is shown in Table 3.

[0058] Table 3 (unit kg)

[0059]

[0060] The above-mentioned raw materials are mixed and stirred evenly in a high-speed mixer, and foamed at a material temperature of 15-25 degrees Celsius to obtain soft polyurethane foam. After testing, the technical indicators of the polyurethane soft foam are shown in Table 4. The one-dimensional density function curve of polyurethane foam is shown in figure 2 , according to the structure diagram of lignin-based polyurethane foam inferred from the SAXS map, see image 3 .

[0061] Table 4

[0062]

[0063] The data in Table 4 proves that compared with the standard sample, the polyurethane soft foam adopting lignin-b...

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Abstract

The invention relates to a polyurethane flexible foam material, particularly to a strong-support high-elasticity polyurethane flexible foam material and a preparation method thereof, and belongs to the technical field of polyurethane flexible foam production. The polyurethane flexible foam material is mainly prepared from the following raw materials in parts by weight: 80-120 parts of lignin-basedblock copolymerization molecular-grade combined polyether, 45-65 parts of isocyanate, 0.5-5 parts of a foaming catalyst, 1-10 parts of water, and 1-3 parts of a foam stabilizer, wherein 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 polyether polyol by utilizingthe solvation effect of the polyether polyol to form the aromatic polymer segment of the lignin, and the aromatic polymer segment of the lignin and the aliphatic polymer segment of the polyether polyol are co-polymerized to form the molecular-grade combined polyether. The foaming catalyst can be a common foaming catalyst in the field.

Description

technical field [0001] The invention relates to a flexible polyurethane foam material, in particular to a strong-supported and highly elastic polyurethane flexible foam material and a preparation method thereof, 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 polyols, and some vegetable oils with hydroxyl groups. These substances ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/50C08J9/08C08G101/00
CPCC08G18/5072
Inventor 邓泽华张雷丘国豪国海玲郑迁
Owner GLORY HOME FURNISHING JIAXING
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