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Secondary amine chain extension cross-linking agent and polyurethane elastic material

A technology of polyurethane elasticity and cross-linking agent, which is applied in the field of chain extension cross-linking agent and polyurethane, can solve the problems of decreased product strength and hardness, decreased intermolecular hydrogen bonding force, and extended operating window, etc. The effect of improving water resistance and increasing strength

Active Publication Date: 2022-02-15
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Among them, the secondary amine similar to the above-mentioned MDBA structure has lower activity than that of the same family of primary amines, and the operating window is extended; but compared with small molecule alcohols, Its activity is still relatively high
Moreover, compared with the primary amine, the secondary amine has one less hydrogen bond donor "H" in the allophanate group formed with the isocyanate group, so the hydrogen bond force between molecules is reduced, which reduces the strength and hardness of the product.

Method used

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  • Secondary amine chain extension cross-linking agent and polyurethane elastic material
  • Secondary amine chain extension cross-linking agent and polyurethane elastic material
  • Secondary amine chain extension cross-linking agent and polyurethane elastic material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Embodiment 1 Preparation of chain extension crosslinking agent A

[0040] Add 150g of 4,4'-bis-sec-butylaminodiphenylmethane (Wanhua Chemical) and 30g of diglycidyl hexahydrophthalate (Yantai Donghua New Material) into a three-necked flask, heat to 80°C, After 30 minutes, 0.010 g of boron trifluoride monoethylamine (Aladdin's reagent) was added and reacted for 6 hours to obtain chain extension crosslinker A. Nitrogen protection was carried out during the reaction. Use NicoletiS5 Fourier Transform Infrared Spectrometer (U.S. Thermo fisher brand) to test the above product, and the infrared spectrogram is shown in figure 1 , through infrared spectrogram analysis, it can be seen that the epoxy group in the raw material has reacted completely, and the target group hydroxyl is formed. Adopt Bruker AVANCEⅢ400Hz nuclear magnetic resonance spectrometer to carry out carbon spectrum analysis to product, solvent is CDCl3, the result is as follows figure 2 shown.

Embodiment 2

[0041] Example 2 Preparation of chain extension cross-linking agent B

[0042] Add 160g of 4,4'-bis-sec-butylaminodiphenylmethane (Wanhua Chemical) and 25g of diglycidyl hexahydrophthalate (Yantai Donghua New Materials) into a three-necked flask, heat to 70°C, After 30 minutes, 0.015 g of boron trifluoride monoethylamine (Aladdin's reagent) was added and reacted for 5 hours to obtain chain extension cross-linking agent B. Nitrogen protection was carried out during the reaction.

Embodiment 3、4 and comparative example 1、2

[0043] Embodiment 3,4 and comparative example 1,2 TDI system polyurethane elastic material preparation

[0044] The formula of isocyanate prepolymer component (Group A) is as follows in Table 1:

[0045] Table 1 isocyanate prepolymer component formula

[0046] raw material Grade / Name parts by weight Polyether polyol C2020 60 Polyether polyol F3056D 20 plasticizer ATBC 15 polyisocyanate TDI-80 15 Total 110

[0047] Add polyether polyols C2020 and F3056D into the flask according to the formula in Table 2, vacuum dehydrate at 105°C for 2 hours, cool down to 70°C, add TDI-80, heat up to 90°C and react for 5 hours, add ATBC, cool down to 50°C and discharge to obtain Isocyanate prepolymer component.

[0048] The formula of the combined material components (group B) is shown in Table 2:

[0049] Table 2 Combination material composition formula

[0050]

[0051] Mix the raw materials according to the formula in Table 2, hea...

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Abstract

The invention discloses a secondary amine chain extension cross-linking agent and a polyurethane elastic material. The structural formula of the secondary amine chain extension cross-linking agent is shown in the specification, and the preparation method comprises the following step: in the presence of a catalyst, reacting 4, 4'-bis(sec-butylamino) diphenyl methane with hexahydrophthalic acid diglycidyl ester. The operability of the secondary amine chain extension cross-linking agent and the strength, heat resistance and the like of the prepared polyurethane elastic material can be improved.

Description

technical field [0001] The invention relates to the fields of chain-extending cross-linking agents and polyurethanes, in particular to secondary amine chain-extending cross-linking agents and prepared polyurethane elastic materials. Background technique [0002] Aromatic amines are often used as chain extenders in polyurethane (urea) systems. The benzene ring in the aromatic amine structure and the allophanate group formed with the isocyanate group can endow the product with excellent physical and mechanical properties. However, with the development of the industry and the progress of society, the occupational safety and health issues of aromatic amine chain extenders / crosslinkers have been widely concerned. For example, benzidine and 3,3'-dichloro-4,4'-diaminodiphenylmethane (MOCA) are listed as Group I carcinogens by the International Cancer Research Institute under the World Health Organization - clearly carcinogenic to humans role, and there is no minimum safety limit, ...

Claims

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Application Information

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IPC IPC(8): C08G18/32C08G18/10C08G18/66C07C219/14C07C213/04
CPCC08G18/10C08G18/6688C07C219/14C07C2601/14C08G18/3275
Inventor 滕向刘赵兴张聪颖陈杰赵国平刘大伟
Owner WANHUA CHEM GRP CO LTD
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