Polyurethane hard foamed plastics and its preparing method
A technology of rigid foam plastics and foam plastics, applied in the field of foam plastics, can solve the problems of flammability and explosion of cyclopentane, poor thermal insulation performance, etc., and achieve good energy saving effect and low thermal conductivity effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Embodiment 1
[0025] Mix and prepare a mixture composed of various monomer polyethers in a 1000-liter combined polyether storage tank, cool 20 parts of HFC-245fa to 5-10°C, and put it into the combined polyether storage tank that has prepared the combined polyether. Premix in tank for 30 minutes. The composition of the mixture composed of various monomer polyethers in the tank is: 10 parts of amine ether (hydroxyl value 700-770), 9 parts of glycerol polyether (hydroxyl value 330-350), sucrose polyether (hydroxyl value 420- 450) 21 parts, glycerol sucrose polyether (hydroxyl value 400-450) 38 parts, plus appropriate amount of foam stabilizer, water and catalyst, the specific weight parts are: foam stabilizer: 2.3-2.5 parts, water: 1.5-2.6 parts , a total of 0.8 to 2.0 parts of various amine catalysts, usually 3 to 4 kinds are used, which can be: 0.05 to 0.13 parts of dimethylaminodiethyl ether (or pentamethyldiethylenetriamine), N, N-di Methylcyclohexylamine: 0.3-0.6 parts, diethylene glyco...
Embodiment 2
[0027] Mix and prepare the combined polyether in the tank first, and the parts are: 11 parts of amine ether (hydroxyl value 700-770), 10 parts of glycerol polyether (hydroxyl value 330-350), sucrose polyether (hydroxyl value 420-450) 22 parts, 40 parts of glycerol sucrose polyether (hydroxyl value 400-450), and the parts of foam stabilizer, catalyst and water are the same as in Example 1. Inject 24 parts of HFC-245fa foaming agent with a temperature of 15-22°C and the above-mentioned combined polyether into the MEF static mixer of Cannon Company (pressure ≤ 1.5Mpa, flow rate 30-45L / min), and the static mixer also Static mixer products from companies such as Hennecke, OMS or Perros can be used, and then mixed and foamed with polyisocyanate (the same amount as in Example 1) through the injection head of a high-pressure foaming machine, and the rest of the process is the same as in Example 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, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com