Low density polyurethane foam, method of producing, and articles comprising the same
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C08J-009/08
C08J-009/00
출원번호
US-0200536
(2005-08-09)
등록번호
US-7338983
(2008-03-04)
발명자
/ 주소
Simpson,Scott S.
Sato,Tadashi
출원인 / 주소
World Properties, Inc.
대리인 / 주소
Cantor Colburn LLP
인용정보
피인용 횟수 :
5인용 특허 :
19
초록▼
A method for producing a cured, low-density polyurethane foam, the method comprises frothing a reactive polyurethane-forming composition comprising an isocyanate-containing component, an active hydrogen-containing component reactive with the isocyanate-containing component, a blowing agent, a surfac
A method for producing a cured, low-density polyurethane foam, the method comprises frothing a reactive polyurethane-forming composition comprising an isocyanate-containing component, an active hydrogen-containing component reactive with the isocyanate-containing component, a blowing agent, a surfactant, and catalyst system, wherein the catalyst system provides for a delayed curing of the foam; casting the frothed reactive polyurethane-forming composition onto a first carrier; placing a second carrier on a side of the cast foam opposite the first carrier; blowing the froth with the second carrier in place; and curing the blown froth so as to provide a polyurethane foam layer having a density of about 50 to about 400 kg/m3 and a thickness of about 0.3 to about 13 mm. The foams are useful as sealing members.
대표청구항▼
What is claimed is: 1. A method for producing a cured, low density polyurethane foam, the method comprising: mechanically frothing a reactive polyurethane-forming composition comprising an isocyanate-containing component, an active hydrogen-containing component reactive with the isocyanate-containi
What is claimed is: 1. A method for producing a cured, low density polyurethane foam, the method comprising: mechanically frothing a reactive polyurethane-forming composition comprising an isocyanate-containing component, an active hydrogen-containing component reactive with the isocyanate-containing component, a blowing agent comprising water, a surfactant, and catalyst system, wherein the catalyst system provides for a delayed curing of the foam; and in a continuous process, casting the frothed reactive polyurethane-forming composition onto a moving first carrier; placing a second carrier on a side of the cast froth opposite the first carrier; blowing the froth with the second carrier in place; and curing the blown froth so as to provide a polyurethane foam layer having a compression load deflection at 50% of about 0.003 to about 0.025 MPa, a compression load deflection at 75% of about 0.02 to about 0.40 MPa, a density of about 50 to about 400 kg/m3 and a thickness of about 0.3 to about 13 mm. 2. The method of claim 1, wherein the second carrier imparts a smooth surface finish to the cured polyurethane foam. 3. The method of claim 1, further comprising passing the first carrier, froth, and second carrier through a thickness adjusting means. 4. The method of claim 1, wherein the first carrier, the second carrier, or both are bonded to the cured polyurethane foam layer. 5. The method of claim 4, wherein the bonding occurs upon cure of the blown froth while in contact with the first carrier, second carrier, or both. 6. The method of claim 1, wherein the first carrier, the second carrier, or both comprises a layer that is releasable from the first carrier, the second carrier, or both, but that bonds to the frothed, blown reactive polyurethane foam layer upon cure; and further comprising removing the first carrier, second carrier or both from the cured polyurethane foam and the bonded releasable layer. 7. The method of claim 1, wherein the active hydrogen-containing component comprises a polyether polyol. 8. The method of claim 7, wherein the polyether polyol has the formula R[(OCHnH2n)zOH]a, wherein R is hydrogen or a polyvalent hydrocarbon radical; a is 2-8, equal to the valence of R; n in each occurrence is 1-2; and z in each occurrence is 2 to about 200. 9. The method of claim 8, wherein the polyether polyol has an ethylene oxide content of about 20 wt. % or less, based on the weight of the polyol. 10. The method of claim 1, further comprising a chemical blowing agent, a physical blowing agent, or a combination thereof, in addition to water. 11. The method of claim 10, wherein the physical blowing agent is 1,1-dichloro-1-fluoroethane, 1,1-dichloro-2,2,2-trifluoro-ethane, monochlorodifluoromethane, 1-chloro-1,1-difluoroethane; 1,1,1,3,3,3-hexafluoropropane, 2,2,4,4-tetrafluorobutane, 1,1,1,3,3,3-hexafluoro-2-methylpropane, 1,1,1,3,3-pentafluoropropane, 1,1,1,2,2-pentafluoropropane, 1,1,1,2,3-pentafluoropropane, 1,1,2,3,3-pentafluoropropane, 1,1,2,2,3-pentafluoropropane, 1,1,1,3,3,4-hexafluorobutane, 1,1,1,3,3-pentafluorobutane, 1,1,1,4,4,4-hexafluorobutane, 1,1,1,4,4-pentafluorobutane, 1,1,2,2,3,3-hexafluoropropane, 1,1,1,2,3,3-hexafluoropropane, 1,1-difluoroethane, 1,1,1,2-tetrafluoroethane, pentafluoroethane, methyl-1,1,1-trifluoroethylether, difluoromethyl-1,1,1-trifluoroethylether; n-pentane, isopentane, cyclopentane, or a combination comprising at least one of the foregoing blowing agents. 12. The method of claim 1, wherein the catalyst comprises a metal acetylacetonate. 13. The method of claim 1, wherein the cured polyurethane foam layer includes cells having average cell diameters of about 20 to about 500 micrometer. 14. The method of claim 1, wherein the relative dielectric constant of the cured polyurethane foam layer at each of the frequencies of 10 kHz, 100 kHz and 1 MHz is about 1 to about 2.0. 15. The method of claim 1, wherein the foam has a thickness of 0.3 to 5 mm and a density of about 320 to about 400 kg/m3. 16. The method of claim 1, wherein the foam has a thickness of about 0.5 to about 13 mm and a density of about 50 to about 240 kg/m3. 17. An article comprising the foam of claim 1. 18. The article of claim 17, in the form of a sealing member. 19. The method of claim 1, wherein one or both of the first carrier and the second carrier comprises a release layer on at least one side thereof, and the frothed reactive polyurethane-forming composition is contacted with one or both of the release layers on the first and second carriers.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (19)
Snell Tung Deborah Ann ; Rollick Kevin ; Scoarste John Michael ; Johnston Walter Francis, Compositions of polycondensed branched polyester polymers and aromatic polycarbonates, and the closed cell polymer foams made therefrom.
Barth Bruce P. (Bridgewater NJ) Johnson Robert N. (Basking Ridge NJ) Mayer Walter P. (Lebanon NJ), Frothable polyurethane composition and a cellular foam produced therefrom suitable for use in joints between wallboards.
Bessette Michael D. (Storrs CT) Jerard Robert B. (Hanover NH), Method of molding a mechanically frothed urethane resin foam and an open-top injection mold therefore.
Lee Thomas B. ; Fishback Thomas L. ; Reichel Curtis J., Polyol composition having good flow and formic acid blown rigid polyurethane foams made thereby having good dimensional.
Fishback Thomas L. ; Reichel Curtis J. ; Lee Thomas B., Polyol compositions having good flow and water blown rigid polyurethane foams made thereby having good dimensional stabi.
Allen Gary L. ; Barksby Nigel ; Seneker Stephen D. ; Younes Usama E., Polyurethane elastomers having improved green strength and demold time, and polyoxyalkylene polyols suitable for their p.
McClellan Thomas Roy (Mission Viejo CA) Mizulo John T. (Irvine CA) Nelson Edwin S. (North Hollywood CA) Pato Grant R. (Costa Mesa CA), Process for forming microcellular structures having an integral skin and products thereof.
Grier Laura A. (Brazoria TX) Neill Paul L. (Lake Jackson TX) Priester Ralph D. (Lake Jackson TX) Mobley Larry W. (Cohutta GA) Skaggs Kenneth W. (Lake Jackson TX) Turner Robert B. (Lake Jackson TX), Process for preparation of polyurethanes utilizing novel catalysts.
Gott Samuel L. (Kingsport TN) Carter Thomas E. (Kingsport TN) Petroskey Wade T. (Kingsport TN) Williams T. Hugh (Fall Branch TN) Zima G. C. (Kingsport TN), Process for the production of polyurethane foams.
Singhal, Pooja; Wilson, Thomas S.; Cosgriff-Hernandez, Elizabeth; Maitland, Duncan J., Device and method for treatment of openings in vascular and septal walls.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.