Preparation method of polyurethane microporous elastomer
A technology of microporous elastomer and polyurethane, which is applied in the field of materials, can solve the problems of limited application, difficulty in meeting the demand for low-temperature compression set performance, poor low-temperature flexibility, etc., and achieve excellent low-temperature flexibility, excellent low-temperature compression set performance, and optimized The effect of the preparation process
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Example Embodiment
[0017] Example 1
[0018] Prepolymer preparation: After melting 100 parts by weight of PTMEG with a hydroxyl value of 56 mg KOH / g at 80 ° C, 40 parts by weight XDI is added, and after maintaining this temperature for 30 minutes, a clear and transparent polyurethane prepolymer is obtained. While stirring, it is cooled to 60 ° C to obtain a transparent and clear mixed prepolymer.
[0019] Preparation of chain spreader: In 60 °C molten 100 parts by weight of PTMEG with a hydroxyl value of 56 mg KOH / g, add 5 parts by weight of water, 0.5 parts by weight of foam stabilizer, and 0.4 parts by weight of catalyst, and mix them for 2 hours to obtain a chain spreader.
[0020] Preparation of polyurethane microporous elastomer products: 80 °C prepolymer and 50 °C chain expander according to the weight ratio of 100:35 mixed, stirred, foaming reaction, reaction time 30min, after curing to obtain the finished product, for evaluation.
Example Embodiment
[0021] Example 2
[0022] On the basis of Example 1, in the chain expander component, the weight of the water is reduced to 2.5, the added diol is changed from PTMEG to 1,4-butanediol, the part by weight of which is 4, other conditions remain unchanged.
Example Embodiment
[0023] Example 3
[0024] On the basis of Example 1, when preparing the prepolymer, a PCL with a hydroxyl value of 56 mgKOH / g is used, other conditions remain unchanged.
PUM
Property | Measurement | Unit |
---|---|---|
Hydroxyl value | aaaaa | aaaaa |
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