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
CN101016368AActive Publication Date: 2007-08-15WANHUA CHEM BEIJING +2
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
WANHUA CHEM BEIJING
Publication Date
2007-08-15
Patent Text Reader

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.
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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
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