US4264743A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane foam sealing material and process for producing the same
Assignee: NHK Spring Co Ltd
•
Filing: 1979-04-23
•
Granted: 1981-04-28
•
Expires: 1999-04-23
Abstract
Abstract A flexible or semi-rigid open-cell, polyurethane foam sealing material prepared from a polyisocyanate and a polyol component, a major portion of said polyol component consisting of a polyol derived from a dimer acid or castor oil, castor oil, or a mixture thereof in the presence of a blowing agent, a foam stabilizer, a catalyst, and, optionally, a lipophilic filler.
Inventors
- 👤 Takao Maruyama
- 👤 Koichi Kusakawa
- 👤 Toshiaki Kimura
- 👤 Noboru Murata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:06
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/36; C08G18/40; C08G18/42; C08G18/4205; C08G18/423; C08G18/4233; C08G2110/00; C08G2110/0008; C08G2110/0016; C08G2110/0083; C08G2170/00; C08G2170/60; C08G2190/00
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
109 words
A flexible open-cell, polyurethane foam sealing material prepared from a polyisocyanate and a polyol component a major portion of which consists of (1) a polyol derived from a dimer acid having a number average molecular weight of 600 to 5000 and an average functionality of 1.6 to 4.0, or (2) castor oil or a polyol derived from castor oil having a number average molecular weight of 600 to 5000 and an average functionality of 3 to 4, or a mixture thereof in the presence of a blowing agent, a surfactant and a catalyst and having an air permeability of 10 cc/cm2/sec or less at a thickness of 10 mm.
Claim 2
Dependent Claim
109 words
A flexible open-cell, polyurethane foam sealing material prepared from a polyisocyanate and a polyol component a major portion of which consists of (1) a polyol derived from a dimer acid having a number average molecular weight of 600 to 5000 and an average functionality of 1.6 to 4.0, or (2) castor oil or a polyol derived from castor oil having a number average molecular weight of 600 to 5000 and an average functionality of 3 to 4, or a mixture thereof in the presence of a blowing agent, a surfactant and a catalyst and having an air permeability of 10 cc/cm2/sec or less at a thickness of 10 mm.
Claim 3
Dependent Claim
114 words
A flexible open-cell, polyurethane foam sealing material prepared from a polyisocyanate and a polyol component a major portion of which consists of (1) a polyol derived from a dimer acid having a number average molecular weight of 600 to 5000 and an average functionality of 1.6 to 4.0, or (2) castor oil or a polyol derived from castor oil having a number average molecular weight of 600 to 5000 and an average functionality of 3 to 4, or a mixture thereof in the presence of a lipophilic filler, a blowing agent, a surfactant, and a catalyst and having an air permeability of 10 cc/cm 2 /sec or less at a thickness of 10 mm.
Claim 4
Dependent Claim
114 words
A flexible open-cell, polyurethane foam sealing material prepared from a polyisocyanate and a polyol component a major portion of which consists of (1) a polyol derived from a dimer acid having a number average molecular weight of 600 to 5000 and an average functionality of 1.6 to 4.0, or (2) castor oil or a polyol derived from castor oil having a number average molecular weight of 600 to 5000 and an average functionality of 3 to 4, or a mixture thereof in the presence of a lipophilic filler, a blowing agent, a surfactant, and a catalyst and having an air permeability of 10 cc/cm 2 /sec or less at a thickness of 10 mm.
Claim 5
Dependent Claim
20 words
A polyurethane foam sealing material as set forth in claim 1 or 2, wherein the surfactant is an organosilicon compound.
Claim 6
Dependent Claim
27 words
A polyurethane foam sealing material as set forth in claim 3, wherein the organosilicon compound is a compound having an active hydrogen radical or active hydrogen radicals.
Claim 7
Dependent Claim
23 words
A polyurethane foam sealing material as set forth in claim 4, wherein the organosilicone compound is, polydimethyl-siloxane-polyalkyleneglycol block copolymer having active hydrogen radicals.
Claim 8
Dependent Claim
59 words
A polyurethane foam sealing material as set forth in claim 3, wherein the organosilicon compound is a silicone oil represented by the following formula: R.sub.3 SiO--SiR.sub.2 O--.sub.x --SiR.sub.3 in which R is an alkyl group such as methyl, ethyl and butyl or an aryl group such as phenyl, and X is an integer of 0 or a positive integer.
Claim 9
Dependent Claim
55 words
A polyurethane foam sealing material as set forth in claim 2, wherein the lipophilic filler is a hydrocarbon, a dicarboxylic acid diester, or an animal or vegetable oil, and said lipophilic filler has a melting or softening point of 150° C. or lower and a boiling point of 200° C. or higher at atmospheric pressure.
Claim 10
Dependent Claim
39 words
A polyurethane foam sealing material as set forth in claim 2, wherein the lipophilic filler is coal tar, asphalt, or a petroleum resin prepared by polymerizing a C 4 -C 9 fraction obtained as a byproduct in naphtha cracking.
Claim 11
Dependent Claim
123 words
A process for producing a polyurethane foam sealing material which comprises reacting a polyisocyanate and a polyol component a major portion of which consists of (1) a polyol derived from a dimer acid having a number average molecular weight of 600 to 5000 and an average functionality of 1.6 to 4.0 or (2) castor oil or a polyol derived from castor oil having a number average molecular weight of 600 to 5000 and an average functionality of 3 to 4, or a mixture thereof in the presence of a blowing agent, a surfactant, and a catalyst under such a condition as to provide a polyurethane foam having an air permeability of 10 cc/cm 2 /sec or less at a thickness of 10 mm.
Claim 12
Dependent Claim
123 words
A process for producing a polyurethane foam sealing material which comprises reacting a polyisocyanate and a polyol component a major portion of which consists of (1) a polyol derived from a dimer acid having a number average molecular weight of 600 to 5000 and an average functionality of 1.6 to 4.0 or (2) castor oil or a polyol derived from castor oil having a number average molecular weight of 600 to 5000 and an average functionality of 3 to 4, or a mixture thereof in the presence of a blowing agent, a surfactant, and a catalyst under such a condition as to provide a polyurethane foam having an air permeability of 10 cc/cm 2 /sec or less at a thickness of 10 mm.
Claim 13
Dependent Claim
25 words
A process for producing a polyurethane foam sealing material as set forth in claim 9, wherein a lipophilic filler is formulated in the foaming compound.
Claim 14
Dependent Claim
97 words
A polyurethane foam sealing material as set forth in claim 4, wherein the polydimethyl siloxane-polyalkyleneglycol block copolymer having active hydrogen radicals is represented by the following formula: ##STR14## wherein R and R' are alkyl radicals having a carbon number of 1 to 4, and n is an integer of 2 to 4, and p, q, r and Z denote integers, and ##STR15## wherein R represents alkyl radicals having a carbon number of 1 to 4, R' is a divalent organic radical, and n denotes an integer of 2 to 4, and L, m, and Z denote integers.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-04-27 | 1984-10-27 | 1985-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-27 | 1988-10-27 | 1989-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-27 | 1992-10-27 | 1993-04-28 | $7700.00 | Window Closed / Lapsed |