EP0351852A2
Expired / Lapsed
EP
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Method of manufacturing polyurethane foam
Assignee: Human Industry Corp
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Filing: 1989-07-20
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Granted: —
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Expires: 2009-07-20
Abstract
Abstract A method of manufacturing polyurethane foams comprising the steps of mixing a polyol and an organic isocyanate without casuing them to substantially react each other thereby to obtain a nonreacted mixture, mixing the nonreacted mixture with a foaming agent, a catalyst, a foam stabilizer and other necessary additires such as a pigment, a fire retardant and a filler, and injecting the resultant mixture to foam and crosslink. The polylol and the organic isocyanate may be preliminarily mixed with a gas such as an inert gas or air. The nonreacted mixture containing the polyol and organic isocyanate may be subjected to again at a temperature of -10to 25°C for 12 to 27 hours.
Inventors
- 👤 Sadao Kumasaka
- 👤 Satomi Tada
- 👤 Koretoshi Katsuki
- 👤 Osamu Fujii
- 👤 Shigeo Kuga
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 22:03
CPC Classifications
B; B29; B29B; B29B7/00; B29B7/74; B29B7/7404; B29B7/7433; B29B7/7409; B29B7/7428; B29B7/7476; B29B7/7485; Y; Y10; Y10S; Y10S521/00; Y10S521/914; Y10S521/917
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
179 words
A method of manufacturing a polyurethane foam by supplying a polyol, an organic isocyanate, a foaming agent, a catalyst, a foam stabilizer, and the other necessary additives such as a pigment, a fire retardant, and a filler to a mixer, mixing and stirring the polyol, the organic isocyanate, the foaming agent, the catalyst, the foaming stabilizer, and the other necessary additi ves such as the pigment, the fire retardant, and the filler, and injecting a foamable solution, comprising the steps of: (i) supplying the polyol and the organic isocyanate from different lines to a blender and causing the blender to mix the polyol and the organic isocyanate to obtain a nonreacted mixture containing the polyol and the organic isocyanate; (ii) supplying the nonreacted mixture to the mixer and causing the mixer to mix the nonreacted mixture with the foaming agent, the catalyst, the foam stabilizer, and others necessary additives such as the pigment, the fire retardant, and the filler; and (iii) injecting the resultant mixture obtained in the step (ii) from the mixer to foam and crosslink the mixture.
Claim 2
Independent Claim
179 words
A method of manufacturing a polyurethane foam by supplying a polyol, an organic isocyanate, a foaming agent, a catalyst, a foam stabilizer, and the other necessary additives such as a pigment, a fire retardant, and a filler to a mixer, mixing and stirring the polyol, the organic isocyanate, the foaming agent, the catalyst, the foaming stabilizer, and the other necessary additi ves such as the pigment, the fire retardant, and the filler, and injecting a foamable solution, comprising the steps of: (i) supplying the polyol and the organic isocyanate from different lines to a blender and causing the blender to mix the polyol and the organic isocyanate to obtain a nonreacted mixture containing the polyol and the organic isocyanate; (ii) supplying the nonreacted mixture to the mixer and causing the mixer to mix the nonreacted mixture with the foaming agent, the catalyst, the foam stabilizer, and others necessary additives such as the pigment, the fire retardant, and the filler; and (iii) injecting the resultant mixture obtained in the step (ii) from the mixer to foam and crosslink the mixture.
Claim 3
Dependent Claim
29 words
A method according to claim 1, characterized in that the step (i) is performed under a condition which substantially inhibits a reaction between the polyol and the organic isocyanate.
Claim 4
Dependent Claim
45 words
A method according to claim 2, characterized in that the step (i) is performed in (a) an atmosphere at -10 C to 25°C, (b) an inert gas atmosphere, (c) an atmosphere which is substantially shielded from moisture, or any combination of conditions (a) to (c).
Claim 5
Dependent Claim
41 words
A method according to claim 1, characterized in that the step (ii) comprises the step of adding and mixing an adjusting organic isocyanate when the catalyst, or water, the foaming agent, and the form stabilizer are added to the solution mixture.
Claim 6
Dependent Claim
39 words
A method according to claim 1, characterized by further comprising the step of causing another blender to mix the nonreacted mixture produced in the step (i) with a gelling catalyst and supplying the resultant mixture to the step (ii).
Claim 7
Dependent Claim
17 words
A method according to claim 5, characterized in that the gelling catalyst consists of a tin compound.
Claim 8
Dependent Claim
47 words
A method according to claim 1, characterized by further comprising the step of supplying a gelling catalyst from another line to the blender in the step (i), mixing the gelling catalyst with the polyol and the organic isocyanate, and supplying the resultant mixture to the step (ii).
Claim 9
Dependent Claim
17 words
A method according to claim 7, characterized in that the gelling catalyst consists of a tin compound.
Claim 10
Dependent Claim
42 words
A method according to claim 1, characterized by further comprising the step of supplying the nonreacted mixture produced in the step (i), stirring and aging the nonreacted mixture at -10-25°C for 12-72 hours, and supplying the aged mixture to the step (ii).
Claim 11
Dependent Claim
33 words
A method according to claim 9, characterized by further comprising the step of mixing the aged mixture with a gelling catalyst in another blender, and supplying the resultant mixture to the step (ii).
Claim 12
Dependent Claim
17 words
A method according to claim 10, characterized in that the gelling catalyst consists of a tin compound.
Claim 13
Dependent Claim
51 words
A method according to claim 1, characterized in that the blender in the step (i) also serves as an aging tank, and further comprising the step of stirring and aging the nonreacted mixture in the blender at -10∼25 C for 12∼27 hours, and supplying the aged mixture to the step (ii).
Claim 14
Dependent Claim
45 words
A method according to claim 12, characterized by further comprising the step of mixing the aged mixture with a gelling catalyst supplied from another line, mixing the aged mixture with the gelling catalyst in another blender, and supplying the resultant mixture to the step (ii).
Claim 15
Dependent Claim
17 words
A method according to claim 13, characterized in that the gelling catalyst consists of a tin compound.
Claim 16
Dependent Claim
46 words
A method according to claim 1, characterized by further comprising the step of supplying a gas from another line to the blender in step (i), stirring and mixing the gas with the polyol and the organic isocyanate, and supplying the resultant mixture to the step (ii).
Claim 17
Dependent Claim
25 words
A method according to claim 15, characterized in that the gas is a material selected from the group consisting of an inert gas and air.
Claim 18
Dependent Claim
37 words
A method according to claim 15, characterized by further comprising the step of stirring and mixing the resultant mixture with a gelling catalyst in the blender in advance, and supplying the resultant mixture to the step (ii).
Claim 19
Dependent Claim
43 words
A method according to claim 1, characterized by further comprising the step of stirring and mixing the nonreacted mixture produced in the step (i) with a gas supplied from another line in another blender, and supplying the resultant mixture to the step (ii).
Claim 20
Dependent Claim
25 words
A method according to claim 18, characterized in that the gas is a material selected from the group consisting of an inert gas and air.
Claim 21
Dependent Claim
46 words
A method according to claim 1, characterized by further comprising the step of stirring and mixing the nonreacted mixture produced in the step (i) with a gas and a gelling catalyst which are supplied from different lines, and supplying the resultant mixture to the step (ii).
Claim 22
Dependent Claim
25 words
A method according to claim 20, characterized in that the gas is a material selected from the group consisting of an inert gas and air.
References Cited (Backward Citations)
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