Method of preparing full MDI polyurethane slow rebound foam

A slow rebound and polyurethane technology, applied in the field of polyurethane foam preparation, can solve problems such as unsatisfactory effect, foam shrinkage, and high price

Active Publication Date: 2007-08-15
WANHUA CHEM BEIJING +2
View PDF3 Cites 82 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method is common in the process of preparing slow-rebound foam, which makes the side of the molded foam easy to crack when the mold is opened, and also causes the foam to shrink, affecting the appearance and yield of the foam
Adding a cell opener is a common method to solve the problem of closed cells, but the commercially available cell opener is expensive, which increases the cost of raw materials, and sometimes the effect is not very satisfactory, which is also a factor that leads to the unstable storage of the combined polyether.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034]Polyol1 starts from glycerin, propylene oxide and ethylene oxide end capped copolyols, the functionality is 3, the EO content is 14%, and the hydroxyl value is 35 mg KOH / g;

[0035] Polyol2 starts from glycerin, propylene oxide and ethylene oxide random copolymerized polyols, the functionality is 3, the EO content is 13%, and the hydroxyl value is 24mg KOH / g;

[0036] Starting from polyol3 propylene glycol, propylene oxide polymerized polyol, the functionality is 2, the PO content is 100%, and the hydroxyl value is 56mg KOH / g;

[0037] polyol4 styrene, acrylonitrile copolymer graft modified polyether polyol, solid content 30%, hydroxyl value 24mg KOH / g;

[0038] polyol5 is a propylene oxide ring-opening polymerized polyol with a functionality of 3, a PO content of 100%, and a hydroxyl value of 240 mg KOH / g.

[0039] polyol6 propylene oxide, ethylene oxide copolyol, EO content 73%, functionality 3, hydroxyl value 42mg KOH / g;

[0040] polyol7 is a copolymerized polyol of...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
hydroxyl valueaaaaaaaaaa
hydroxyl valueaaaaaaaaaa
hydroxyl valueaaaaaaaaaa
Login to view more

Abstract

The invention discloses a making method of full-MDI polyurethane slow-rebound foam in the polyurethane foam making technical domain, which comprises the following parts: a. MDI system isocyanate with functional degree at 2.1-2.5, b. polyether polyol, c. foamer, d, catalyst and surface activator, wherein the composite polyether consists of bulk polyether product and relative adjuvant without physical foamer, which can be reserved as pillow, bustle and mattress for a long time.

Description

technical field [0001] The invention relates to a preparation method of an all-MDI polyurethane slow-rebound foam, which belongs to the technical field of polyurethane foam preparation. Background technique [0002] As we all know, polyurethane slow-resilience foam is called memory foam and viscoelastic foam. No pinching and tingling. Therefore, slow rebound foam is widely used as pillows, mattresses, cushions, etc., which is beneficial to human blood circulation and is a high-comfort health care foam. [0003] MDI, TDI or their mixtures can be used to prepare slow rebound foam. Compared with TDI, MDI has certain advantages in process technology. MDI has high reactivity and can reduce the amount of catalyst, thereby reducing the VOC of the foam; MDI has a relatively wide The index range, within which the hardness and resilience of the foam can be adjusted by changing the index. In addition, compared with TDI, MDI has an environmental protection advantage, which is benefic...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/70C08G18/48C08G18/24C08G101/00
Inventor 张谦和喻建明刘新建林芳茜崔能伟
Owner WANHUA CHEM BEIJING
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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