[특허]Struvite-K and syngenite composition for use in building materials

Struvite-K and syngenite composition for use in building materials 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	C04B-011/00 C04B-022/06 C04B-022/16 C04B-011/28 C04B-012/02 C04B-028/34 C04B-111/00
출원번호	US-0457826 (2014-08-12)
등록번호	US-9422193 (2016-08-23)
발명자 / 주소	Hauber, Robert J. Boydston, Gerald D. Frailey, Nathan Lamberet, Severine Pattarkine, Gaurav V. Cherian, Isaac K. Centurione, Sergio Ghosh, Anirban
출원인 / 주소	CertainTeed Gypsum, Inc.
대리인 / 주소	Economou, Vangelis
인용정보	피인용 횟수 : 0 인용 특허 : 26

초록 ▼

A composition and process for the manufacture thereof for use in a hybrid building material comprising at least in part Syngenite (K2Ca(SO4)2.H2O) and Struvite-K (KMgPO4.6H2O). Specified constituents, including magnesium oxide (MgO), monopotassium phosphate (MKP) and stucco (calcium sulfate hemihydrate) are mixed in predetermined ratios and the reaction proceeds through multiple phases reactions which at times are proceeding simultaneously and in parallel and reaction may even compete with each other for reagents if the Struvite-K reaction is not buffered to slow down the reaction rate). A number of variable factors, such as water temperature, pH mixing times and rates, have been found to affect resultant reaction products. Preferred ratios of chemical constituents and manufacturing parameters, including predetermined and specified ratios of Struvite-K and Syngenite may be provided for specified purposes, optimized in respect of stoichiometry to reduce the combined heat of formation to non-destructive levels.

대표청구항 ▼

1. A process for the continuous manufacture of a composition for use in a building product comprising: a) providing a mixer reaction chamber;b) continuously feeding constituent materials into the mixer reaction chamber;c) continuously mixing the constituent materials within said mixing reaction chamber to produce a slurry;d) withdrawing the slurry from the mixer reaction chamber; ande) utilizing said slurry in the manufacture of a building product; wherein said solid constituent materials comprise the following in specified ranges by weight percent: MgO: 3.33 to 70.00% KH2PO4: 4.67 to 70.00% stucco hemihydrate CaSO4.½H2O: 10.5 to 90.0% all adding up to 100% and addition of water: 20.0 to 40.0% of the constituent solid materials. 2. The process for the continuous manufacture of a composition according to claim 1 wherein the specified ranges of said solid constituent materials further comprise: MgO: 40.0 to 70.0% KH2PO4: 10.0 to 40.00% stucco hemihydrate CaSO4.½H2O: 25.0 to 75.0% and including an amount of 20.0 to 40.0% by weight of water relative to the solid constituents. 3. The process for the continuous manufacture of a composition according to claim 1 wherein the specified ranges of said solid constituent materials further comprise a ratio of the MgO to the KH2PO4 between 1:1.0 and 1:3.0. 4. The process for the continuous manufacture of a composition according to claim 3 wherein the specified ranges of said solid constituent materials further comprise a ratio of MgO to KH2PO4 between 1:1.9 and 1:2.2. 5. The process for the continuous manufacture of a composition according to claim 1 wherein the specified ranges of said constituent materials further comprises a defoamer. 6. The process for the continuous manufacture of a composition according to claim 1 wherein the specified ranges of said constituent materials further comprises a dispersant. 7. The process for the continuous manufacture of a composition according to claim 1 wherein the specified ranges of said constituent materials further comprises H2SO4. 8. The process for the continuous manufacture of a composition according to claim 1 wherein the specified ranges of said constituent materials further comprises rate retarding compound selected from the group consisting of boric acid (H3BO3) and sulfuric acid (H2SO4). 9. The process for the continuous manufacture of a composition according to claim 8 wherein the specified ranges of said constituent materials further comprises a silicone oil selected from the group consisting of polysiloxane (C2H6OSi)n, polydimethylsiloxane (CH3[Si(CH3)2O]nSi(CH3)3), polydimethylsiloxane and poly(methyl hydrogen) siloxane and the dispersant further comprises polynapthalene sulfonate. 10. The process for the continuous manufacture of a composition according to claim 8 further comprising a wax emulsion additive. 11. The process according to claim 1 wherein the constituent materials are reacted within the reaction mixer according to the following mechanism: MgO+KH2PO4+CaSO4.½H2O to produce in varying amounts KMgPO4.6H2O and K2Ca(SO4)2.H2O. 12. The process according to claim 1 wherein the constituent materials are reacted within the reaction mixer according to the following equation: 3MgO+3KH2PO4+2CaSO4.½H2O+3H2O→KMgPO4.6H2O+K2Ca(SO4)2.H2O+Ca+2+2Mg+22(PO4)−3 wherein the reaction occurs in the presence of one or more of the compounds selected from the group consisting of sulfuric acid, boric acid, a siloxane and naphthalene sulfonate.

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