US4451587A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane foam and its production
Assignee: Takeda Pharmaceutical Co Ltd
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Filing: 1982-09-23
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Granted: 1984-05-29
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Expires: 2002-09-23
Abstract
Abstract A polyurethane foam produced by the reaction of a polyisocyanate and a polyether polyol in the presence of a catalyst, a cell regulating agent and water as a blowing agent, the polyether polyol of which consists of a halogenated polyether polyol (I) of the general formula: ##STR1## wherein x is a number of 0 to 7; y is a number of 2 to 3; A is a saturated or unsaturated, brominated polyol residue having a number of functional groups of y; R is hydrogen or an alkyl group having 1 to 5 carbon atoms and (II) a polyether polyol having a number of functional groups of 2 to 8, a weight ratio of the added amounts of propylene oxide and ethylene oxide within the range of about 75 to 95/25 to 5 and a hydroxyl number of about 20 to 100 mgKOH/g, whereby a weight ratio of (I) to (II) is about 95 to 25/5 to 75 and the amount of water is about 5 to 20 parts by weight against 100 parts by weight of the polyol component. The polyurethane foam has uniform and open cells and shows excellent physical properties in compressive strength, tensile strength, excellent sound absorption characteristics and flame resistance, and is therefore used as thermal insulation materials, acoustic absorption materials and shock absorption materials for houses, vehicles, etc.
Inventors
- 👤 Akizo Keshi
- 👤 Katsuhisa Kodama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:23
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/50; C08G18/5003; C08G18/5006; Y; Y10; Y10S; Y10S521/00; Y10S521/914
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
176 words
A polyurethane foam produced by the reaction of a polyisocyanate and a polyether polyol in the presence of a catalyst, a cell regulating agent and a blowing agent comprising water, the polyether polyol of which consists of a halogenated polyether polyol (I) of the general formula: ##STR7## wherein x is a number of 0 to 7; y is a number of 2 to 3; A is a saturated or unsaturated, brominated polyol residue having a number of functional groups of y; and R is hydrogen or an alkyl group having 1 to 5 carbon atoms and (II) polyether polyol having a number of functional groups of 2 to 8, a weight ratio of the added amounts of propylene oxide and ethylene oxide within the range of 75 to 95/25 to 5 and a hydroxyl number of about 20 to 100 mgKOH/g, whereby the weight ratio of (I) to (II) is 95 to 25/5 to 75 and the amount of water is 5 to 20 parts by weight against 100 parts by weight of the polyol component.
Claim 2
Dependent Claim
176 words
A polyurethane foam produced by the reaction of a polyisocyanate and a polyether polyol in the presence of a catalyst, a cell regulating agent and a blowing agent comprising water, the polyether polyol of which consists of a halogenated polyether polyol (I) of the general formula: ##STR7## wherein x is a number of 0 to 7; y is a number of 2 to 3; A is a saturated or unsaturated, brominated polyol residue having a number of functional groups of y; and R is hydrogen or an alkyl group having 1 to 5 carbon atoms and (II) polyether polyol having a number of functional groups of 2 to 8, a weight ratio of the added amounts of propylene oxide and ethylene oxide within the range of 75 to 95/25 to 5 and a hydroxyl number of about 20 to 100 mgKOH/g, whereby the weight ratio of (I) to (II) is 95 to 25/5 to 75 and the amount of water is 5 to 20 parts by weight against 100 parts by weight of the polyol component.
Claim 3
Dependent Claim
36 words
A polyurethane foam claimed in claim 1, wherein the weight ratio of the added amounts of propylene oxide and ethylene oxide of the polyether polyol (II) is within the range of 80 to 90/20 to 10.
Claim 4
Dependent Claim
32 words
A polyurethane foam claimed in claim 1, wherein the weight ratio of the halogenated polyether polyol (I) to the polyether polyol (II) is within the range of 85 to 40/15 to 60.
Claim 5
Dependent Claim
28 words
A polyurethane foam claimed in claim 1, wherein the amount of water is 6 to 15 parts by weight against 100 parts by weight of the polyol component.
Claim 6
Dependent Claim
34 words
A polyurethane foam claimed in claim 1, wherein the amount of the polyisocyanate is within the range of 0.4 to 1 equivalent against 1 equivalent of active hydrogen of the polyol component and water.
Claim 7
Dependent Claim
34 words
A polyurethane foam claimed in claim 1, wherein the amount of the polyisocyanate is within the range of 0.6 to 0.8 equivalent against 1 equivalent of active hydrogen of the polyol component and water.
Claim 8
Dependent Claim
13 words
A polyurethane foam claimed in claim 1, wherein the polyisocyanate is polymethylenepolyphenylene polyisocyanate.
Claim 9
Dependent Claim
178 words
A process for producing a polyurethane foam, which comprises reacting (1) a polyol, as the polyol component, consisting of a halogenated polyether polyol (I) of the general formula: ##STR8## wherein x is a number of 0 to 7; y is a number of 2 to 3; A is a saturated or unsaturated, brominated polyol residue having a number of functional groups of y; and R is hydrogen or an alkyl group having 1 to 5 carbon atoms and (II) polyether polyol having a number of functional groups of 2 to 8, a weight ratio of the added amount of propylene oxide and ethylene oxide within the range of 75 to 95/25 to 5 and a hydroxyl number of 20 to 100 mgKOH/g, whereby a weight ratio of (I) to (II) is 95 to 25/5 to 75, and (2) a blowing agent comprising water, the content of water being 5 to 20 parts by weight against 100 parts by weight of the polyol component, with (3) a polyisocyanate in the presence of a catalyst and a cell regulating agent.
Claim 10
Dependent Claim
178 words
A process for producing a polyurethane foam, which comprises reacting (1) a polyol, as the polyol component, consisting of a halogenated polyether polyol (I) of the general formula: ##STR8## wherein x is a number of 0 to 7; y is a number of 2 to 3; A is a saturated or unsaturated, brominated polyol residue having a number of functional groups of y; and R is hydrogen or an alkyl group having 1 to 5 carbon atoms and (II) polyether polyol having a number of functional groups of 2 to 8, a weight ratio of the added amount of propylene oxide and ethylene oxide within the range of 75 to 95/25 to 5 and a hydroxyl number of 20 to 100 mgKOH/g, whereby a weight ratio of (I) to (II) is 95 to 25/5 to 75, and (2) a blowing agent comprising water, the content of water being 5 to 20 parts by weight against 100 parts by weight of the polyol component, with (3) a polyisocyanate in the presence of a catalyst and a cell regulating agent.
Claim 11
Dependent Claim
36 words
A process as claimed in claim 8, wherein the weight ratio of the added amounts of propylene oxide and ethylene oxide of the polyether polyol (II) is within the range of 80 to 90/20 to 10.
Claim 12
Dependent Claim
32 words
A process as claimed in claim 8, wherein the weight ratio of the halogenated polyether polyol (I) to the polyether polyol (II) is within the range of 85 to 40/15 to 60.
Claim 13
Dependent Claim
28 words
A process as claimed in claim 8, wherein the amount of water is 6 to 15 parts by weight against 100 parts by weight of the polyol component.
Claim 14
Dependent Claim
34 words
A process as claimed in claim 8, wherein the amount of the polyisocyanate is within the range of 0.4 to 1 equivalent against 1 equivalent of active hydrogen of the polyol component and water.
Claim 15
Dependent Claim
34 words
A process as claimed in claim 8, wherein the amount of the polyisocyanate is within the range of 0.6 to 0.8 equivalent against 1 equivalent of active hydrogen of the polyol component and water.
Claim 16
Dependent Claim
13 words
A process as claimed in claim 8, wherein the polyisocyanate is polymethylenepolyphenylene polyisocyanate.
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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) | 1987-05-29 | 1987-11-28 | 1988-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-29 | 1991-11-28 | 1992-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-29 | 1995-11-28 | 1996-05-29 | $7700.00 | Window Closed / Lapsed |