Open-loop method for producing a controlled blend of polyol and

Details Open-loop method for producing a controlled blend of polyol and Open-loop method for producing a controlled blend of polyol and

1996-08-02

1999-09-28

Cooney, Jr., John M.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

521159, 264 451, 25218224, C08J 904

Patent

active

059589914

ABSTRACT:
A novel methodology and apparatus have been discovered which is of value in the production of polyurethane foam. This invention relates to a one-pass, on-demand process and apparatus for producing a controlled, homogeneous blend of the polyol-blowing agent mixture used in the manufacture of polyurethane foam using either a low-boiling point or high-boiling point blowing agent. A method is provided to control the amount of each material in the mixture, ensure homogeneous blending of the two materials after mixing, a pressure control means to maintain blowing agents in their liquid state (where necessary), and a monitoring means which allows rapid verification of the operating status of the entire system. The process is comprised of:

REFERENCES:
patent: 5444100 (1995-08-01), Takezawa et al.

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