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2020-11
03
Q: How to calculate the amount of chain extender when making polyurethane?
Question:How to calculate the amount of chain extender when making polyurethane?Answer:Just use according to the instructions in the manual.Ethylenediamine can be prepared by reacting 1,2-dichloroethane with ammonia, or by reacting 1,2-dibromoethane with ammonia. Ethylene diamine is an important che
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2020-11
03
Q: What is the difference between chain extenders and crosslinkers?
Q: What is the difference between chain extenders and crosslinkers?Answer: The dual functionality of chain extenders enables linear growth of molecular chains. Crosslinking agents have multifunctionality and form a bulk structure.
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2020-11
03
What chain extender is used for polyurethane elastomer MDI
There are mainly two types of chain extenders for polyurethane elastomers: diamines and diols. Among them, the most important type of diamine is MOCA. In the process of producing MOCA, a certain proportion of MDA is generally carried, and MDA is also one of the chain extenders that can be used alone
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2020-11
03
Full understanding of the article on chain extenders
Also known as chain extender, it is a substance that can react with functional groups on linear polymer chains to expand molecular chains and increase molecular weight. Commonly used to improve the mechanical and process properties of polyurethane, polyester and other products.Chinese name:Chain ext
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2020-11
03
Principles and Applications of Chain extenders
Chain extenderIntroduction:Also known as chain extender, it is a substance that can react with functional groups on linear polymer chains to expand molecular chains and increase molecular weight. Commonly used to improve the mechanical and process properties of polyurethane, polyester and other prod
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2020-11
03
Complete analysis of hydrophobic agents for water-based coatings
Introduction:Water based coating hydrophobic agent is a mixed compound that, after surface modification by scientific technology, disperses in water to form a stable dispersion. When added to the coating, it can form a special water-resistant structure on the film-forming surface of the coating (cha
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2020-11
02
Common hydrophobic agents and their usage methods
Common hydrophobic agents include:Fatty acid metal soap, paraffin wax, polyolefin, organosilicon resin, fluorocarbon polymer.The surface coated with organic silicon resin and fluorocarbon polymer has excellent hydrophobicity, with a contact angle of up to 140°~160°。The hydrophobicity of hydrophob
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2020-11
02
The effect and application of BASF chain extenders on chain extension and thickening of biodegradable materials
(one) Extrusion and Particle Extraction Process of PLA with Chain extenders and Zinc stearate BASF Chain extenders in Biodegradable Materials-PLA PBS、PHA、PHB、PCLCurrently produced domestically and internationallyThe most common problem with PLA is its low molecular weight,The main reason is that
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