Patent US5604267A successfully refreshed from Google Patents.
US5604267A
Expired / Lapsed
US
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Process for producing froth polyurethane foam
Assignee: Lyondell Chemical Technology LP
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Filing: 1995-08-30
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Granted: 1997-02-18
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Expires: 2015-08-30
Abstract
Abstract High quality, consistent polyurethane froth foams, both filled and unfilled, are prepared by directing polyol, isocyanate, and optionally other polyurethane-forming ingredients to a high pressure mix head prior to introducing the mixture to a froth foaming head. Changes in stoichiometry may be made rapidly without shut-down. An in-line blender incorporated filler into the polyol stream minimizing density differentials normally encountered in the holding tank, maintaining low and reproducible viscosity, and allowing for greater amounts of filler than otherwise possible.
Inventors
- 👤 Robert D. Duffy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:51
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/36; C08J9/365; B; B29; B29B; B29B7/00; B29B7/74; B29B7/7404; B29B7/7409; B29B7/7428; B29B7/7433; B29B7/76; B29B7/7615; B29B7/7621; B29B7/7631; B29B7/80; B29B7/88; B29B7/90; B29C; B29C44/00; B29C44/02; B29C44/04; B29C44/06; C08J9/30; C08J2375/00; C08J2375/04; Y; Y10; Y10S; Y10S521/00; Y10S521/917; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/31504; Y10T428/31551; Y10T428/31554
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
80 words
A process for the preparation of polyurethane froth foam, comprising: (a) delivering polyurethane reactive components comprising an isocyanate component and a polyol component to a high pressure mix head; (b) delivering compressed gas to said high pressure mix head to form a frothable polyurethane reactive mixture; (c) delivering said frothable polyurethane reactive mixture to a froth foaming head; (d) frothing said frothable polyurethane reactive mixture to form a frothed polyurethane reactive mixture; and (e) recovering a froth foamed polyurethane product.
Claim 2
Dependent Claim
80 words
A process for the preparation of polyurethane froth foam, comprising: (a) delivering polyurethane reactive components comprising an isocyanate component and a polyol component to a high pressure mix head; (b) delivering compressed gas to said high pressure mix head to form a frothable polyurethane reactive mixture; (c) delivering said frothable polyurethane reactive mixture to a froth foaming head; (d) frothing said frothable polyurethane reactive mixture to form a frothed polyurethane reactive mixture; and (e) recovering a froth foamed polyurethane product.
Claim 3
Dependent Claim
16 words
The process of claim 1 wherein said polyurethane froth foam is a filled polyurethane froth foam.
Claim 4
Dependent Claim
64 words
The process of claim 1, further comprising at least partially curing said froth foamed polyurethane product to form an at least partially cured polyurethane product following which steps (a) to (d) are repeated to form a second frothed polyurethane reactive mixture, said second frothable polyurethane reactive mixture applied to said at least partially cured polyurethane product to form a multilayer froth foamed polyurethane product.
Claim 5
Dependent Claim
23 words
The process of claim 1 wherein said polyol and said filler are blended in-line prior to delivery to said high pressure mix head.
Claim 6
Dependent Claim
28 words
The process of claim 4 wherein said filler is present in an amount of from 50 parts to about 450 parts per 100 parts by weight of polyol.
Claim 7
Dependent Claim
21 words
The process of claim 1 further comprising delivering to said high pressure mix head one or more additional polyurethane reactive components.
Claim 8
Dependent Claim
133 words
A process for the preparation of filled polyurethane froth foam, comprising: (a) supplying a feed stream of isocyanate reactive polyol; (b) blending a filler with said feed stream of isocyanate reactive polyol in line to produce a polyol/filler blend; prior to (c) injecting said polyol/filler-containing polyol/filler blend together with one or more additional feed streams comprising an organo di- or polyisocyanate or mixture thereof, one or more urethane-promoting catalysts, and optionally cross-linkers, chain extenders, auxiliaries and additives, and a frothing amount of compressed air into a high pressure mix head to form a frothable polyurethane reactive mixture; (d) delivering said frothable polyurethane reactive mixture to a froth foam head and preparing a curable, filled polyurethane froth foam; (e) curing said curable, filled polyurethane froth foam to form a filled polyurethane froth foam product.
Claim 9
Dependent Claim
133 words
A process for the preparation of filled polyurethane froth foam, comprising: (a) supplying a feed stream of isocyanate reactive polyol; (b) blending a filler with said feed stream of isocyanate reactive polyol in line to produce a polyol/filler blend; prior to (c) injecting said polyol/filler-containing polyol/filler blend together with one or more additional feed streams comprising an organo di- or polyisocyanate or mixture thereof, one or more urethane-promoting catalysts, and optionally cross-linkers, chain extenders, auxiliaries and additives, and a frothing amount of compressed air into a high pressure mix head to form a frothable polyurethane reactive mixture; (d) delivering said frothable polyurethane reactive mixture to a froth foam head and preparing a curable, filled polyurethane froth foam; (e) curing said curable, filled polyurethane froth foam to form a filled polyurethane froth foam product.
Claim 10
Dependent Claim
27 words
The process of claim 7, wherein said filler is present in an amount of from 50 to about 450 parts per 100 parts by weight of polyol.
Claim 11
Dependent Claim
16 words
The process of claim 1 wherein compressed gas is further supplied to said froth foam head.
Claim 12
Independent Claim
151 words
An apparatus suitable for the preparation of filled polyurethane froth foam, said apparatus comprising: (a) a high pressure mix head having three or more high pressure inlets and an outlet; (b) an isocyanate component feed line connected to one of said three or more high pressure inlets; (c) a polyol component feed line connected to one of said three or more high pressure inlets; (d) an in-line blender positioned between a polyol source and said inlet of said high pressure mix head connected to said polyol feed line, said blender supplied with powdered filler, said blender effective to blend said filler into a polyol of said polyol feed line; (e) a compressed gas line connected to one of said three or more high pressure inlets; (f) a froth foam head having an inlet and an outlet, said froth foam head inlet connected to said outlet of said high pressure mix head.
Claim 13
Independent Claim
151 words
An apparatus suitable for the preparation of filled polyurethane froth foam, said apparatus comprising: (a) a high pressure mix head having three or more high pressure inlets and an outlet; (b) an isocyanate component feed line connected to one of said three or more high pressure inlets; (c) a polyol component feed line connected to one of said three or more high pressure inlets; (d) an in-line blender positioned between a polyol source and said inlet of said high pressure mix head connected to said polyol feed line, said blender supplied with powdered filler, said blender effective to blend said filler into a polyol of said polyol feed line; (e) a compressed gas line connected to one of said three or more high pressure inlets; (f) a froth foam head having an inlet and an outlet, said froth foam head inlet connected to said outlet of said high pressure mix head.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-02-18 | 2000-08-19 | 2001-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-02-18 | 2004-08-19 | 2005-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-02-18 | 2008-08-19 | 2009-02-18 | $7700.00 | Window Closed / Lapsed |