US4647596A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microcellular polyurethane elastomer and manufacturing method of the same
Assignee: Bridgestone Corp
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Filing: 1986-04-28
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Granted: 1987-03-03
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Expires: 2006-04-28
Abstract
Abstract Polyol component essentially consists of polyesterpolyetherpolyol containing polyesterpolyol by the weight ratio of 100:0 to 20:80, in which the polyesterpolyetherpolyol is a copolymer of polytetramethyleneglycol (PTMG) and ε-caprolactone by the weight ratio of 20:80 to 80:20 with an average molecular weight of 1000 to 3000 and the polyesterpolyol is a condensate of adipic acid as a main acid component with an average molecular weight of 1000 to 3000, is reacted with isocyanate component essentially consists of 4,4'-diphenylmethanediisocyanate (MDI) to make a prepolymer with terminal radical of NCO. Microcellular polyurethane produced from the prepolymer by foaming and polymerization reaction has the durability for vibration-proof material of car use, combining the advantage of PTMG such as high initial modulus at elongation, low heat built up, low-temperature property and hydrolysis-durability under high humid and hot conditions, with the advantage of polycaprolactone such as good molding property and anti-bending-fatigue property, as well as making up for the disadvantage of both polyols each other. Thus improving the problems of microcellular polyurethane using MDI such as low initial modulus at elongation and high heat built up.
Inventors
- 👤 Seiji Ishii
- 👤 Masanori Miyoshi
- 👤 Takumi Ishiwaka
- 👤 Osamu Kondo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:11
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/42; C08G18/4266; C08G18/4269; C08G18/4277; C08G18/4202; C08G18/65; C08G18/66; C08G18/6633; C08G18/6637; C08G2110/00; C08G2110/0041; C08G2110/0066; C08G2350/00; Y; Y10; Y10S; Y10S521/00; Y10S521/904
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
106 words
In a microcellular polyurethane elastomer produced by foaming and polymerization reaction of prepolymer with terminal radical of NCO prepared by the reaction of polyol component and isocyanate component, the improvement comprising; the polyol component essentially consists of polyester-polyetherpolyol containing polyesterpolyol by the weight ratio of 100:0 20:80, in which the polyesterpolyetherpolyol is a copolymer of polytetramethyleneglycol and ε-caprolactone by the weight ratio of 20:80 to 80:20 with an average molecular weight of 1000 to 3000 and the polyesterpolyol is a condensate of adipic acid as a main acid component with an average molecular weight of 1000 to 3000, and the isocyanate component essentially consists of 4,4'-diphenylmethanediisocyanate.
Claim 2
Dependent Claim
106 words
In a microcellular polyurethane elastomer produced by foaming and polymerization reaction of prepolymer with terminal radical of NCO prepared by the reaction of polyol component and isocyanate component, the improvement comprising; the polyol component essentially consists of polyester-polyetherpolyol containing polyesterpolyol by the weight ratio of 100:0 20:80, in which the polyesterpolyetherpolyol is a copolymer of polytetramethyleneglycol and ε-caprolactone by the weight ratio of 20:80 to 80:20 with an average molecular weight of 1000 to 3000 and the polyesterpolyol is a condensate of adipic acid as a main acid component with an average molecular weight of 1000 to 3000, and the isocyanate component essentially consists of 4,4'-diphenylmethanediisocyanate.
Claim 3
Dependent Claim
30 words
A microcellular polyurethane elastomer according to claim 1, in which molar ratio of NCO radical in the isocyanate component to OH radical in the polyol component is 1.6 to 4.0.
Claim 4
Dependent Claim
27 words
A microcellular polyurethane elastomer according to claim 2, in which the polyesterpolyetherpolyol is a copolymer of polytetramethyleneglycol and ε-caprolactone by the weight ratio of 50:50 to 30:70.
Claim 5
Dependent Claim
20 words
A microcellular polyurethane elastomer according to claim 2, in which the average molecular weight of polyesterpolyetherpolyol is 1500 to 2500.
Claim 6
Dependent Claim
20 words
A microcellular polyurethane elastomer according to claim 2, in which the average molecular weight of polyesterpolyol is 1500 to 2500.
Claim 7
Dependent Claim
19 words
A microcellular polyurethane elastomer according to claim 2, the density of which is 0.35 to 7.0 gr./cm 3 .
Claim 8
Dependent Claim
121 words
A manufacturing method of microcellular polyurethane elastomer comprising; a polyol component which consists of polyesterpolyetherpolyol containing polyesterpolyol by the weight ratio of 100:0 to 20:80, in which the polyesterpolyetherpolyol is a copolymer of polytetramethyleneglycol and ε-caprolactone by the weight ratio of 20:80 to 80:20 with an average molecular weight of 1000 to 3000 and the polyesterpolyol is a condensate of adipic acid as a main acid component with an average molecular weight of 1000 to 3000, is reacted with 4,4'-diphenylmethanediisocyanate as an isocyanate component to make a prepolymer with terminal radical of NCO, and to the prepolymer thus made, water as a main component of foaming and polymerization agent is added and stirred homogeneously to carry out foaming and polymerization reaction.
Claim 9
Dependent Claim
121 words
A manufacturing method of microcellular polyurethane elastomer comprising; a polyol component which consists of polyesterpolyetherpolyol containing polyesterpolyol by the weight ratio of 100:0 to 20:80, in which the polyesterpolyetherpolyol is a copolymer of polytetramethyleneglycol and ε-caprolactone by the weight ratio of 20:80 to 80:20 with an average molecular weight of 1000 to 3000 and the polyesterpolyol is a condensate of adipic acid as a main acid component with an average molecular weight of 1000 to 3000, is reacted with 4,4'-diphenylmethanediisocyanate as an isocyanate component to make a prepolymer with terminal radical of NCO, and to the prepolymer thus made, water as a main component of foaming and polymerization agent is added and stirred homogeneously to carry out foaming and polymerization reaction.
Claim 10
Dependent Claim
38 words
A manufacturing method of microcellular polyurethane elastomer according to claim 7, in which molar ratio of NCO radical in the isocyanate component to OH radical in the polyol component is adjusted to the value from 1.6 to 4.0.
Claim 11
Dependent Claim
30 words
A manufacturing method of microcellular polyurethane elastomer according to claim 8, in which the polyester-polyetherpolyol is a copolymer of polytetramethyleneglycol and ε-caprolactone by the weight ratio of 50:50 to 30:70.
Claim 12
Dependent Claim
23 words
A manufacturing method of microcellular polyurethane elastomer according to claim 8, in which the average molecular weight of polyesterpolyetherpolyol is 1500 to 2500.
Claim 13
Dependent Claim
23 words
A manufacturing method of microcellular polyurethane elastomer according to claim 8, in which the average molecular weight of polyesterpolyol is 1500 to 2500.
References Cited (Backward Citations)
US4059659A
Cited
US4559366A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-03-02 | 1990-09-01 | 1991-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-02 | 1994-09-01 | 1995-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-02 | 1998-09-01 | 1999-03-03 | $7700.00 | Window Closed / Lapsed |