[미국특허]
Gypsum wallboard and method of making same
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C04B-028/14
B28B-019/00
C08J-009/00
C04B-103/48
C04B-111/00
출원번호
US-0476078
(2014-09-03)
등록번호
US-9889579
(2018-02-13)
발명자
/ 주소
Stav, Eli
Fey, Karen
Sethuraman, Gopalakrishnan
Miatudila, Ma-Ikay
Robertson, Craig
Bailey, Joseph
출원인 / 주소
National Gypsum Properties, LLC
대리인 / 주소
Dority & Manning, P.A.
인용정보
피인용 횟수 :
0인용 특허 :
51
초록▼
Compositions for gypsum board are disclosed, comprising a mixture of a gypsum slurry and a pre-generated foam and a coalescing agent. The coalescing agent comprises one or more coalescing agents that are added to the composition singly, separately or in combination to change the size and distributio
Compositions for gypsum board are disclosed, comprising a mixture of a gypsum slurry and a pre-generated foam and a coalescing agent. The coalescing agent comprises one or more coalescing agents that are added to the composition singly, separately or in combination to change the size and distribution of the air bubbles in the foamed gypsum slurry. The resulting gypsum cores have increased nail pull resistance and an improved facer/gypsum core bond.
대표청구항▼
1. A foamed gypsum slurry composition, comprising: stucco;gauging water;a foam comprising foaming water, a foaming agent and air;a first coalescing agent having a first cloud point temperature; anda second coalescing agent having a second cloud point temperature that is different from the first clou
1. A foamed gypsum slurry composition, comprising: stucco;gauging water;a foam comprising foaming water, a foaming agent and air;a first coalescing agent having a first cloud point temperature; anda second coalescing agent having a second cloud point temperature that is different from the first cloud point temperature;wherein the foamed gypsum slurry composition has a mix temperature, and the first and second coalescing agents have a blended cloud point temperature that is lower than the mix temperature. 2. The foamed gypsum slurry composition of claim 1, wherein the blended cloud point temperature is lower than the mix temperature by about 5° F. to about 30° F. 3. The foamed gypsum slurry composition of claim 1, wherein the blended cloud point temperature is lower than the mix temperature by about 5° F. to about 10° F. 4. The foamed gypsum slurry of claim 1, wherein the first coalescing agent has a cloud point temperature of about 68° F., and the second coalescing agent has a cloud point temperature of about 110° F. 5. The foamed gypsum slurry of claim 1, wherein the first or second coalescing agent is a polyether block copolymer surfactant. 6. The foamed gypsum slurry of claim 5, wherein the polyether block copolymer surfactant is an ethylene oxide-propylene oxide block copolymer and/or reverse block copolymer. 7. The foamed gypsum slurry of claim 1, wherein the first or second coalescing agent is an alkoxylated alcohol surfactant. 8. The foamed gypsum slurry of claim 7, wherein the alkoxylated alcohol surfactant is a fatty alcohol alkoxylate. 9. The foamed gypsum slurry of claim 1, wherein the first and/or second coalescing agent has a delayed coalescing activity. 10. A method for making a foamed gypsum slurry composition, comprising the steps of: providing a gypsum slurry comprising stucco and gauging water;generating a foam comprising foam water, a foaming agent and air;introducing the foam to the gypsum slurry to form a foamed gypsum slurry having a mix temperature;adding a first coalescing agent to the foamed gypsum slurry, the first coalescing agent having a first cloud point temperature; andadding a second coalescing agent to the foamed gypsum slurry, the second coalescing agent having a second cloud point temperature that is different from the first cloud point temperature;wherein the first and second coalescing agents have a blended cloud point temperature that is lower than the mix temperature. 11. The method of claim 10, wherein the first and second coalescing agents have a blended cloud point temperature that is lower than the mix temperature by about 5° F. to about 30° F. 12. The method of claim 10, wherein the first and second coalescing agents have a blended cloud point temperature that is lower than the mix temperature by about 5° F. to about 10° F. 13. The method of claim 10, further comprising the steps of: determining the mix temperature of the foamed gypsum slurry; andadjusting the ratio of the first and second coalescing agents to provide a blended cloud point temperature that is lower that the mix temperature. 14. The method of claim 13, wherein the first and second coalescing agents have a blended cloud point temperature that is lower than the mix temperature by about 5° F. to about 30° F. 15. The method of claim 13, wherein the first and second coalescing agents have a blended cloud point temperature that is lower than the mix temperature by about 5° F. to about 10° F. 16. The method of claim 10, wherein the first coalescing agent has a cloud point temperature of about 68° F., and the second coalescing agent has a cloud point temperature of about 110° F. 17. The method of claim 10, wherein the first and second coalescing agents are added to the foamed gypsum slurry by mixing with a component of the composition selected from the group consisting of: the gypsum slurry, the gauging water, the foam water, the foaming agent, the foam, and combinations thereof. 18. The method of claim 17, wherein the first and second coalescing agents are added separately to the foamed gypsum slurry by mixing with different components of the composition. 19. The method of claim 10, further comprising the steps of: transferring the gypsum slurry from a mixer to a canister and to a boot; andintroducing the foam to the gypsum slurry in the mixer or the canister; andwherein the first and second coalescing agents are added to the foamed gypsum slurry at a location selected from the group consisting of: the mixer, the canister, the boot, and combinations thereof. 20. The method of claim 19, wherein the first and second coalescing agents are added separately to the foamed gypsum slurry at different locations. 21. The method of claim 10, wherein the first or second coalescing agent is a polyether block copolymer surfactant. 22. The method of claim 21, wherein the polyether block copolymer surfactant is an ethylene oxide-propylene oxide block copolymer and/or reverse block copolymer. 23. The method of claim 10, wherein the first or second coalescing agent is an alkoxylated alcohol surfactant. 24. The method of claim 23, wherein the alkoxylated alcohol surfactant is a fatty alcohol alkoxylate. 25. A method for making a gypsum board, comprising the steps of: providing a gypsum slurry comprising stucco and water;generating a foam comprising water, a foaming agent and air;introducing the foam to the gypsum slurry to form a foamed gypsum slurry having a mix temperature;determining the mix temperature of the foamed gypsum slurry;adding a first coalescing agent to the foamed gypsum slurry, the first coalescing agent having a first cloud point temperature;adding a second coalescing agent to the foamed gypsum slurry, the second coalescing agent having a second cloud point temperature that is different from the first cloud point temperature, wherein the first and second coalescing agents are added in a ratio that provides a blended cloud point temperature that is lower that the mix temperature by about 5° F., to about 30° F.;applying the foamed gypsum slurry to a first facing material;applying a second facing material atop the foamed gypsum slurry to sandwich the foamed gypsum slurry between the first and second facing materials;forming the foamed gypsum slurry to a desired thickness; anddrying the foamed gypsum slurry to form a board. 26. The method of claim 25, wherein the first and second coalescing agents are added in a ratio that provides a blended cloud point temperature that is lower that the mix temperature by about 5° F. to about 10° F.
Lee, Ronald A.; Durocher, David T.; Iyer, Sridhar Gopalkrishnan; Romanek, Richard J.; Stav, Eli; Fey, Karen, Gypsum slurries and boards and methods of making the same.
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Knop Bernhard (Monheim-Blee DEX) Tamm Horst (Haan DEX) Walter Gerhard (Erkrath DEX), Use of ethylene oxide/propylene oxide block copolymers in hydraulic binder materials and materials so obtained.
Dreher, Stefan; Roser, Joachim; Pakusch, Joachim; Knofel, Dietbert; Boettger, Karl-Georg, Use of polysulfide-free preparations as an additive for loam or clay-based construction materials.
Hommer, Herbert; Bichler, Manfred; Strauβ, Werner; Wutz, Konrad, Use of water-soluble polymers as auxiliary drying agents for the production of polymer dispersing agents.
Spindler,Christian; Plank,Johann; Fenchl,Andrea; Huber,Uwe, Water-soluble copolymers based on olefinic sulfonic acids, method for the production thereof and use of the same.
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