Method for preparing polyurethaneurea elastic fiber with improved heat settability and polyurethaneurea elastic fiber prepared by the same
An elastic fiber, polyurethane urea technology, applied in the field of polyurethane urea elastic fiber, can solve the problems of unfavorable spinning, low yarn uniformity, modulus and elastic recovery deterioration, etc., to improve hand feel, high and low temperature heat setting efficiency, improve The effect of yarn uniformity
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Example Embodiment
[0042] Example 1
[0043] In a nitrogen atmosphere, 32g of 2,4'-diphenylmethane diisocyanate, 427g of 4,4'-diphenylmethane diisocyanate and 2000g of polytetramethylene ether glycol (molecular weight = 1800) The reaction was stirred at 90°C for 180 minutes to prepare a polyurethaneurea prepolymer having isocyanate groups at both ends. The prepolymer was cooled to room temperature, and 3614 g of dimethylacetamide was added to obtain a polyurethaneurea prepolymer solution. Subsequently, 33.6g (0.56mol) of ethylenediamine, 10.4g (0.14mol) of 1,2-diaminopropane, and 5.14g of diethylamine were dissolved in 656g of dimethylacetamide and heated at 10°C or lower It is added to the prepolymer solution at temperature to prepare a polyurethane urea solution.
[0044] Based on the solid content of the obtained polymer, 1.5% by weight of ethylenebis(oxyethylene)bis-(3-(5-tert-butyl-4-hydroxy-m-tolyl)-propionate), 0.5% by weight of 5,7-di-tert-butyl-3-(3,4-dimethylphenyl)-3H-benzofuran-2-one,...
Example Embodiment
[0046] Example 2
[0047] In a nitrogen atmosphere, 46g of 2,4'-diphenylmethane diisocyanate, 413g of 4,4'-diphenylmethane diisocyanate and 2000g of polytetramethylene ether glycol (molecular weight = 1800) The reaction was stirred at 90°C for 180 minutes to prepare a polyurethaneurea prepolymer having isocyanate groups at both ends. The prepolymer was cooled to room temperature, and 3614 g of dimethylacetamide was added to obtain a polyurethaneurea prepolymer solution. Subsequently, 33.6g (0.56mol) of ethylenediamine, 10.4g (0.14mol) of 1,2-diaminopropane, and 5.14g of diethylamine were dissolved in 656g of dimethylacetamide and heated at 10°C or lower It is added to the prepolymer solution at temperature to prepare a polyurethane urea solution.
[0048] Based on the solid content of the obtained polymer, 1.5% by weight of ethylenebis(oxyethylene)bis-(3-(5-tert-butyl-4-hydroxy-m-tolyl)-propionate), 0.5% by weight of 5,7-di-tert-butyl-3-(3,4-dimethylphenyl)-3H-benzofuran-2-one,...
Example
[0050] Examples 3 and 4
[0051] A polyurethaneurea elastic fiber was prepared in the same manner as in Example 1, except that the ratio of 2,4'-diphenylmethane diisocyanate to 4,4'-diphenylmethane diisocyanate was changed. The physical properties were evaluated in the same manner, and the results are shown in Table 1.
PUM
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap