US4205136A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing a rigid polyurethane foam having excellent flame retardance and low-smoke development
Assignee: Bridgestone Corp
•
Filing: 1979-02-21
•
Granted: 1980-05-27
•
Expires: 1999-02-21
Abstract
Abstract A process for producing a rigid polyurethane foam having excellent flame retardance and low-smoke development is disclosed. When the rigid polyurethane foam is produced by reacting a polyhydroxyl compound with an organic polyisocyanate in the presence of a blowing agent, a surfactant, a catalyst and other additives, 3-methylpentane-1,3,5-triol is used as a part of the polyhydroxyl compound.
Inventors
- 👤 Takashi Ohashi
- 👤 Minoru Kojima
- 👤 Masako Yoshida
- 👤 Toru Okuyama
- 👤 Ryozo Sakata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:42
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/65; C08G18/66; C08G18/6603; C08G18/6607; C08G18/6611; C08G18/30; C08G18/32; C08G18/3203; C08G18/3206; C08G2110/00; C08G2110/0025; C08G2110/0041; C08G2110/005; Y; Y10; Y10S; Y10S521/00; Y10S521/902; Y10S521/903
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
64 words
In a process for producing a rigid polyurethane or polyisocyanurate foam having excellent flame-retardance and low-smoke development by reacting a polyhydroxyl compound with an organic polyisocyanate in the presence of a blowing agent, a surfactant and a catalyst, the improvement comprising using 3-methyl-pentane-1,3,5-triol in admixture with said polyhydroxyl compound, in an amount of 0.2-2.0 equivalent of said triol per equivalent of said polyhydroxyl compound.
Claim 2
Dependent Claim
64 words
In a process for producing a rigid polyurethane or polyisocyanurate foam having excellent flame-retardance and low-smoke development by reacting a polyhydroxyl compound with an organic polyisocyanate in the presence of a blowing agent, a surfactant and a catalyst, the improvement comprising using 3-methyl-pentane-1,3,5-triol in admixture with said polyhydroxyl compound, in an amount of 0.2-2.0 equivalent of said triol per equivalent of said polyhydroxyl compound.
Claim 3
Dependent Claim
31 words
A process as claimed in claim 1, wherein said polyhydroxyl compound is one having 3 or more hydroxyl groups in its molecule and a hydroxyl number of not less than 100.
Claim 4
Dependent Claim
21 words
A process as claimed in claim 1, wherein said polyhydroxyl compound is selected from the group consisting of polyether-polyols and polyester-polyols.
Claim 5
Dependent Claim
25 words
A process as claimed in claim 3, wherein said polyether-polyol is one obtained by addition reaction of an active hydrogen compound with an alkylene oxide.
Claim 6
Dependent Claim
30 words
A process as claimed in claim 4, wherein said active hydrogen compound is selected from the group consisting of glycerine, trimethylol propane, 3-methylpentane-1,3,5-triol, pentaerythritol, sorbitol, sucrose, bisphenol-A, ethylenediamine and diethylenetriamine.
Claim 7
Dependent Claim
25 words
A process as claimed in claim 4, wherein said alkylene oxide is selected from the group consisting of ethylene oxide, propylene oxide and butylene oxide.
Claim 8
Dependent Claim
46 words
A process as claimed in claim 3, wherein said polyester-polyol is one having a hydroxyl group at its terminals and obtained by condensation reaction of a dicarboxylic acid selected from adipic acid and phthalic acid with a polyhydric alcohol selected from ethylene glycol and trimethylol propane.
Claim 9
Dependent Claim
15 words
A process as claimed in claim 1, wherein said organic polyisocyanate is an aromatic polyisocyanate.
Claim 10
Dependent Claim
34 words
A process as claimed in claim 1, wherein said organic polyioscyanate is a mixture of polymethylene polyphenyl isocyanates having the following formula ##STR2## wherein n is 0 or an integer of more than 1.
Claim 11
Dependent Claim
58 words
A process as claimed in claim 1, wherein the ratio of said organic polyisocyanate used per total amount of said polyhydroxyl compound is within a range of 90-150 when using a catalyst commonly used for the production of polyurethane foam as said catalyst or within a range of 100-250 when using an isocyanurate forming catalyst as said catalyst.
Claim 12
Dependent Claim
23 words
A process as claimed in claim 1, wherein said catalyst is selected from catalysts commonly used for the production of polyurethane and polyisocyanurate.
Claim 13
Dependent Claim
37 words
A process as claimed in claim 11, wherein said catalyst commonly used for the production of polyurethane foam is selected from the group consisting of triethylamine, triethylenediamine, tetramethylenediamine, dimethylethanolamine, dimethylcyclohexylamine, stannous octoate, dibutyltin dilaurate and lead octylate.
Claim 14
Dependent Claim
42 words
A process as claimed in claim 11, wherein said catalyst commonly used for the production of polyisocyanurate foam is selected from the group consisting of N,N',N"-tris(dialkylaminoalkyl)-sym-hexahydrotriazine, 2,4,6-tris(dimethylaminomethyl)phenol, 1,8-diazabicyclo(5,4,0)undecene-7, potassium acetate, potassium propionate, potassium caprylate, potassium 2-ethyl hexanoate, potassium adipate and sodium benzoate.
Claim 15
Dependent Claim
17 words
A process as claimed in claim 1, wherein said blowing agent is a low-boiling inert organic compound.
Claim 16
Dependent Claim
13 words
A process as claimed in claim 1, wherein said blowing agent is trichloromonofluoromethane.
References Cited (Backward Citations)
US3591532A
Cited
US3956202A
Cited
US3933694A
Cited
US4039487A
Cited
US4145318A
Cited
US4133781A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-05-27 | 1983-11-26 | 1984-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-05-27 | 1987-11-26 | 1988-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-05-27 | 1991-11-26 | 1992-05-27 | $7700.00 | Window Closed / Lapsed |