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Patent US4304875A successfully refreshed from Google Patents.
US4304875A
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US
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Polyurethane foaming composition comprising triorganosilylated polypentaerythritol stabilizer
Assignee: Rhone Poulenc Industries SA
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Filing: 1980-10-10
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Granted: 1981-12-08
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Expires: 2000-10-10
Abstract
Abstract A flexible, elastic, uniform polyurethane foam is cold foamed and set from a composition of matter comprising (i) a polyisocyanate, (ii) a polyether-polyol having a molecular weight ranging from 800 to 50,000 and at least 2.1 hydroxyl radicals per mol, of which hydroxyl radicals at least 35% are primary hydroxyl radicals, (iii) a stabilizing amount of an organosilicon stabilizer therefor, and (iv) a blowing agent; said organo silicon stabilizer being a triorganosilylated polypentaerythritol having the structural formula: (R.sub.3 SiOCH.sub.2).sub.4-a C{CH.sub.2 OCH.sub.2 C(CH.sub.2 OSiR 3 ) 3 } a wherein each R, which may be the same or different, is methyl, ethyl or vinyl, at least one R per each --SiR 3 group being methyl, and further wherein a is 1, 2, 3 or 4.
Inventors
- 👤 Maurice Duvernay
- 👤 Francesco Farina
- 👤 Andre Guillaume
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:46
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0014; C08J9/0042; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/18; C07F7/1804; C08J2375/00; C08J2375/04; C08J2375/08; Y; Y10; Y10S; Y10S521/00; Y10S521/904
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
115 words
A composition of matter adapted to cold foam into a flexible polyurethane foam, comprising (i) a polyisocyanate, (ii) a polyether-polyol having a molecular weight ranging from 800 to 50,000 and at least 2.1 hydroxyl radicals per mol, of which hydroxyl radicals at least 35% are primary hydroxyl radicals, (iii) a stabilizing amount of an organosilicon stabilizer therefor, and (iv) a blowing agent; said organosilicon stabilizer being a triorganosilylated polypentaerythritol having the structural formula: (R.sub.3 SiOCH.sub.2).sub.4-a C{CH.sub.2 OCH.sub.2 C(CH.sub.2 OSiR.sub.3).sub.3 }.sub.a wherein each R, which may be the same or different, is methyl, ethyl or vinyl, at least one R per each--SiR 3 group being methyl, and further wherein a is 1, 2, 3 or 4.
Claim 2
Dependent Claim
115 words
A composition of matter adapted to cold foam into a flexible polyurethane foam, comprising (i) a polyisocyanate, (ii) a polyether-polyol having a molecular weight ranging from 800 to 50,000 and at least 2.1 hydroxyl radicals per mol, of which hydroxyl radicals at least 35% are primary hydroxyl radicals, (iii) a stabilizing amount of an organosilicon stabilizer therefor, and (iv) a blowing agent; said organosilicon stabilizer being a triorganosilylated polypentaerythritol having the structural formula: (R.sub.3 SiOCH.sub.2).sub.4-a C{CH.sub.2 OCH.sub.2 C(CH.sub.2 OSiR.sub.3).sub.3 }.sub.a wherein each R, which may be the same or different, is methyl, ethyl or vinyl, at least one R per each--SiR 3 group being methyl, and further wherein a is 1, 2, 3 or 4.
Claim 3
Dependent Claim
34 words
The composition of matter as defined by claim 1, said triorganosilylated polypentaerythritol stabilizer (iii) being present in an amount ranging from 0.001 to 1% by weight, based upon the weight of the polyether-polyol (ii).
Claim 4
Dependent Claim
32 words
The composition of matter as defined by claim 2, said stabilizer (iii) being present in an amount ranging from 0.005 to 0.1% by weight, base upon the weight of the polyether-polyol (ii).
Claim 5
Dependent Claim
19 words
The composition of matter as defined by claim 2, the hydroxyl number of the polyether-polyol (ii) not exceeding 45.
Claim 6
Dependent Claim
29 words
The composition of matter as defined by claim 2, the amount of polyisocyanate (i) being such as to provide therein from 0.8 to 1.5--NCO radicals per active hydrogen atom.
Claim 7
Dependent Claim
15 words
The composition of matter as defined by claim 2, said blowing agent (iv) comprising water.
Claim 8
Dependent Claim
16 words
The composition of matter as defined by claim 2, said blowing agent (iv) comprising a haloalkane.
Claim 9
Dependent Claim
29 words
The composition of matter as defined by claim 6, the amount of water being 1 to 6 parts by weight, per 100 parts by weight of the polyether-polyol (ii).
Claim 10
Dependent Claim
29 words
The composition of matter as defined by claim 7, the amount of haloalkane being 2 to 20 parts by weight, per 100 parts by weight of the polyether-polyol (ii).
Claim 11
Dependent Claim
19 words
The composition of matter as defined by claim 2, further comprising a catalytically effective amount of a crosslinking catalyst.
Claim 12
Dependent Claim
40 words
The composition of matter as defined by claim 10, further comprising at least one additive selected from the group consisting of a reaction retarder, a cell structure regulator, a pigment, a flameproofing agent, a plasticizer, a fungicide and a bactericide.
Claim 13
Dependent Claim
24 words
The composition of matter as defined by claim 2, said stabilizer (iii) having the structural formula: {(CH.sub.3).sub.3 SiOCH.sub.2 {.sub.3 CCH.sub.2 OCH.sub.2 C{CH.sub.2 OSi(CH.sub.3).sub.3 }.sub.3.
Claim 14
Dependent Claim
26 words
The composition of matter as defined by claim 2, said stabilizer (iii) having the structural formula: {(CH.sub.3).sub.2 (CH.sub.2 ═CH)SiOCH.sub.2 }.sub.3 CCH.sub.2 OCH.sub.2 C{CH.sub.2 OSi (CH═CH.sub.2)(CH.sub.3).sub.2 }.sub.3.
Claim 15
Dependent Claim
24 words
The composition of matter as defined by claim 2, said stabilizer (iii) having the structural formula: {(CH.sub.3).sub.3 SiOCH.sub.2 }.sub.2 C[CH.sub.2 OCH.sub.2 OSi(CH.sub.3).sub.3 }.sub.3 ].sub.2.
Claim 16
Dependent Claim
27 words
The composition of matter as defined by claim 2, said stabilizer (iii) having the structural formula: {(CH.sub.3).sub.2 (C.sub.2 H.sub.5)SiOCH.sub.2 }.sub.2 C[CH.sub.2 OCH.sub.2 C{CH.sub.2 OSi(C.sub.2 H.sub.5)(CH.sub.3).sub.2 }.sub.3 ].sub.2.
Claim 17
Dependent Claim
24 words
The composition of matter as defined by claim 2, said stabilizer (iii) having the structural formula: (CH.sub.3).sub.3 SiOCH.sub.2 C[CH.sub.2 OCH.sub.2 C{CH.sub.2 OSi(CH.sub.3).sub.3 }.sub.3 ].sub.3.
Claim 18
Dependent Claim
22 words
The composition of matter as defined by claim 2, said stabilizer (iii) having the structural formula: C[CH.sub.2 OCH.sub.2 C{CH.sub.2 OSi(CH.sub.3).sub.3 }.sub.3 ].sub.4.
Claim 19
Dependent Claim
28 words
A flexible, elastic, uniform polyurethane foam devoid of honeycomb, comprised of the foamed and set composition of matter as defined by any one of claims 1 to 17.
Claim 20
Dependent Claim
47 words
A method for the preparation of the flexible, elastic, uniform polyurethane foam as defined by claim 18, comprising intimately admixing the several ingredients of the composition, charging a mold cavity with such admixture, and thence permitting such admixture to ambient foam and set within said mold cavity.
Claim 21
Dependent Claim
15 words
A shaped article comprising the flexible, elastic, uniform polyurethane foam as defined by claim 18.
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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) | 1984-12-07 | 1985-06-08 | 1985-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-07 | 1989-06-08 | 1989-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-07 | 1993-06-08 | 1993-12-08 | $7700.00 | Window Closed / Lapsed |