US4302272A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for heat sealing polyurethane foam
Assignee: Bayer Corp
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Filing: 1980-01-14
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Granted: 1981-11-24
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Expires: 2000-01-14
Abstract
Abstract The instant invention is directed to a process for heat sealing flexible polyurethane foam, comprising: A. reacting and foaming a polyurethane foam produced by the steps comprising reacting: (I) an organic polyisocyanate; (II) a polyol having a molecular weight of 2,000 to 8,000 comprising the adduct obtained by sequentially reacting: (a) a polyhydroxyl initiator, with a functionality of 2 to 5 and a weight average molecular weight as determined by gel permeation chromatography of from 62 to 200; with (b) 10 to 90%, most preferably 10 to 50%, by weight, based on the total oxide present in (b)+(c)+(d), a first alkylene oxide; and subsequently reacting the product with (c) 10 to 80%, preferably 20 to 50% by weight, based on the total oxide present in (b)+(c)+(d), 4,4,4-trichloro-1,2-epoxybutane and/or epihalohydrin; and subsequently reacting the product with (d) 10 to 60%, most preferably 10 to 40%, by weight, based on the total oxide present in (b)+(c)+(d), a second alkylene oxide. (III) foaming agent; and optionally (IV) catalyst; B. heating a portion of the surface of said flexible polyurethane foam of (A) above its melting or fusion point; and C. cooling said flexible polyurethane foam below its melting or fusion point.
Inventors
- 👤 Barry A. Phillips
- 👤 Keith G. Spitler
- 👤 Richard E. Keegan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:09
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/50; C08G18/5003; C08G18/5006; C08G18/5009; B; B32; B32B; B32B5/00; B32B5/18; B29; B29C; B29C44/00; B29C44/34; B29C44/56; C08J; C08J5/00; C08J5/12; C08J5/121; B32B2266/00; B32B2266/02; B32B2266/0214; B32B2266/0278; C08J2375/00; C08J2375/04; Y; Y10; Y10S; Y10S521/00; Y10S521/904; Y10S521/914; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
218 words
A process for heat sealing flexible polyurethane foam to a substrate comprising: A. reacting and foaming a flexible polyurethane foam produced by the steps comprising reacting: (I) an organic polyisocyanate; (II) a polyol having a molecular weight of 2,000 to 8,000 comprising the adduct obtained by sequentially reacting: (a) a polyhydroxyl initiator, with a functionality of 2 to 5 and a weight average molecular weight as determined by gel permeation chromatography of from 50 to 200; with (b) 10 to 90%, by weight based on the total oxide present in (b)+(c)+(d), a first alkylene oxide; and subsequently reacting the product with (c) 10 to 80%, by weight, based on the total oxide present in (b)+(c)+(d), 4,4,4-trichloro-1,2-epoxybutane and/or epihalohydrin; and subsequently reacting the product with (d) 10 to 60%, by weight, based on the total oxide present in (b)+(c)+(d), a second alkylene oxide; (III) foaming agent; and optionally (IV) catalyst; B. allowing said resulting polyurethane foam to cure; C. heating a portion of the surface of said flexible polyurethane foam of (B) above its melting or fusion point; and D. contacting the melted or fused surface of said polyurethane flexible foam with a substrate whereby a flexible polyurethane foam/substrate laminate is formed; and E. cooling said flexible polyurethane foam/substrate laminate below the melting or fusion point of said foam.
Claim 2
Dependent Claim
218 words
A process for heat sealing flexible polyurethane foam to a substrate comprising: A. reacting and foaming a flexible polyurethane foam produced by the steps comprising reacting: (I) an organic polyisocyanate; (II) a polyol having a molecular weight of 2,000 to 8,000 comprising the adduct obtained by sequentially reacting: (a) a polyhydroxyl initiator, with a functionality of 2 to 5 and a weight average molecular weight as determined by gel permeation chromatography of from 50 to 200; with (b) 10 to 90%, by weight based on the total oxide present in (b)+(c)+(d), a first alkylene oxide; and subsequently reacting the product with (c) 10 to 80%, by weight, based on the total oxide present in (b)+(c)+(d), 4,4,4-trichloro-1,2-epoxybutane and/or epihalohydrin; and subsequently reacting the product with (d) 10 to 60%, by weight, based on the total oxide present in (b)+(c)+(d), a second alkylene oxide; (III) foaming agent; and optionally (IV) catalyst; B. allowing said resulting polyurethane foam to cure; C. heating a portion of the surface of said flexible polyurethane foam of (B) above its melting or fusion point; and D. contacting the melted or fused surface of said polyurethane flexible foam with a substrate whereby a flexible polyurethane foam/substrate laminate is formed; and E. cooling said flexible polyurethane foam/substrate laminate below the melting or fusion point of said foam.
Claim 3
Dependent Claim
19 words
The process of claim 1 wherein said alkylene oxide of (b) and (d) is ethylene oxide and/or propylene oxide.
Claim 4
Dependent Claim
15 words
The process of claim 1, wherein said polyhydroxyl initiator (a) has a functionality of 3.
Claim 5
Dependent Claim
12 words
The process of claim 3, wherein said polyhydroxyl initiator (a) is glycerol.
Claim 6
Dependent Claim
13 words
The process of claim 1, wherein said organic polyisocyanate (I) is toluene diisocyanate.
Claim 7
Dependent Claim
10 words
The process of claim 1, wherein component (c) is 4,4,4-trichloro-1,2-epoxybutane.
Claim 8
Dependent Claim
10 words
The process of claim 1, wherein component (c) is epihalohydrin.
Claim 9
Dependent Claim
16 words
The process of claim 1, wherein said polyol has a molecular weight of 5,500 to 7,000.
Claim 10
Dependent Claim
23 words
The process of claim 1, wherein component (b) is 10 to 50%; (c) is 20 to 50%; and (d) is 10 to 40%.
Claim 11
Dependent Claim
186 words
A process for melting or fusing portions of flexible polyurethane foam, comprising: A. preparing a polyurethane foam by the steps comprising reacting: (I) an organic polyisocyanate; (II) a polyol having a molecular weight of 2,000 to 8,000 comprising the adduct obtained by sequentially reacting: (a) a polyhydroxyl initiator, with a functionality of 2 to 5 and a weight average molecular weight as determined by gel permeation chromatography of from 62 to 200; with (b) 10 to 90%, by weight, based on the total oxide present in (b)+(c)+(d), a first alkylene oxide; and subsequently reacting the product with (c) 10 to 80%, by weight, based on the total oxide present in (b)+(c)+(d), 4,4,4-trichloro-1,2-epoxybutane and/or epihalohydrin; and subsequently reacting the product with (d) 10 to 60%, by weight, based on the total oxide present in (b)+(c)+(d), a second alkylene oxide; (III) foaming agent; and optionally (IV) catalyst; B. allowing said resulting polyurethane foam to cure; C. heating a portion of the surface of said flexible polyurethane foam of (B) above its melting or fusion point; and D. cooling said flexible polyurethane foam below its melting or fusion point.
Claim 12
Dependent Claim
186 words
A process for melting or fusing portions of flexible polyurethane foam, comprising: A. preparing a polyurethane foam by the steps comprising reacting: (I) an organic polyisocyanate; (II) a polyol having a molecular weight of 2,000 to 8,000 comprising the adduct obtained by sequentially reacting: (a) a polyhydroxyl initiator, with a functionality of 2 to 5 and a weight average molecular weight as determined by gel permeation chromatography of from 62 to 200; with (b) 10 to 90%, by weight, based on the total oxide present in (b)+(c)+(d), a first alkylene oxide; and subsequently reacting the product with (c) 10 to 80%, by weight, based on the total oxide present in (b)+(c)+(d), 4,4,4-trichloro-1,2-epoxybutane and/or epihalohydrin; and subsequently reacting the product with (d) 10 to 60%, by weight, based on the total oxide present in (b)+(c)+(d), a second alkylene oxide; (III) foaming agent; and optionally (IV) catalyst; B. allowing said resulting polyurethane foam to cure; C. heating a portion of the surface of said flexible polyurethane foam of (B) above its melting or fusion point; and D. cooling said flexible polyurethane foam below its melting or fusion point.
Claim 13
Dependent Claim
19 words
The process of claim 10 wherein said alkylene oxide of (b) and (d) is ethylene oxide and/or propylene oxide.
Claim 14
Dependent Claim
15 words
The process of claim 10, wherein said polyhydroxyl initiator (a) has a functionality of 3.
Claim 15
Dependent Claim
12 words
The process of claim 12, wherein said polyhydroxyl initiator (a) is glycerol.
Claim 16
Dependent Claim
13 words
The process of claim 10, wherein said organic polyisocyanate (I) is toluene diisocyanate.
Claim 17
Dependent Claim
10 words
The process of claim 10, wherein component (c) is 4,4,4-trichloro-1,2-epoxybutane.
Claim 18
Dependent Claim
10 words
The process of claim 10, wherein component (c) is epihalohydrin.
Claim 19
Dependent Claim
16 words
The process of claim 10, wherein said polyol has a molecular weight of 5,500 to 7.000.
Claim 20
Dependent Claim
23 words
The process of claim 10, wherein component (b) is 10 to 50%; (c) is 20 to 50%; and (d) is 10 to 40%.
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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) | 1984-11-23 | 1985-05-25 | 1985-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-23 | 1989-05-25 | 1989-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-23 | 1993-05-25 | 1993-11-24 | $7700.00 | Window Closed / Lapsed |