Abstract: An elastomer has the general structure of: where: subscript a is 50-500, b is 1-10, c is 2-30, R1 has the structure: —CH2(CH2)nO(CH2)pCH(OH)(CH2)qNR2R2? where n, p and q are each independently 1-5 and R2 and R2? are independently selected from alkyl and hydroxyalkyl groups having 1-5 carbon atoms; where X is a crosslinker remnant bound to a siloxane unit corresponding to subscript c of a siloxane backbone polymer in addition to the one shown so that the crosslinker remnant in each occurrence is a reaction product with two siloxane backbone polymers, wherein the crosslinker is selected from a group consisting of primary organic dienes, divinyl siloxane and polyoxyalkylenes wherein at least two X components correspond to crosslinker remnants connecting the same two siloxane backbone polymers.
Type:
Grant
Filed:
February 11, 2020
Date of Patent:
March 14, 2023
Assignee:
DOW SILICONES CORPORATION
Inventors:
Kimmai T. Nguyen, Kenneth E. Zimmerman, Donald Kadlec, Hannah Wedge, Nisaraporn Suthiwangcharoen
Abstract: Foam control compositions along with formulations thereof and their use in various applications, including a method for making a foam control composition comprising a cross-linked polyorganosiloxane material including a dispersed silica filler, including the steps of: A) preparing a hydrosilylation reaction mixture by combining the following components: (i) silica filler, (ii) a polyorganosiloxane having at least two reactive substituents capable of addition reaction with component (iii) via hydrosilylation, (iii) a polyorganosiloxane having at least three reactive substituents capable of addition reaction with component (ii) via hydrosilylation, and (iv) a hydrosilylation catalyst; B) conducting a hydrosilylation reaction of components (ii) and (iii) until the reaction mixture at least partially gels to form a hydrosilylation reaction product; C) shearing the hydrosilylation reaction product of step B); and D) combining the hydrosilylation reaction product of step C) with a (v) silicone resin and an (vi)
Type:
Grant
Filed:
January 19, 2021
Date of Patent:
March 7, 2023
Assignee:
Dow Silicones Corporation
Inventors:
Sung-Hsuen Chao, Christophe Deglas, Marc Thibaut
Abstract: Described herein are methods for making alkenyl disiloxanes, comprising combining an alkenyl halosilane with a bis-hydrido terminated alkyl disiloxane and adding the mixture to water, an acidic aqueous solution, or a basic aqueous solution. The ratio of the alkenyl halosilane to the bis-hydrido terminated alkyl disiloxane is about 1:10 to about 10:1. The alkenyl halosilane and bis-hydrido terminated alkyl disiloxane are mixed at about 20° C. to about 45° C. In an example, no organic solvent is present. The reaction product is separated and washed with saturated NaHCO3 solution (e.g., sodium bicarbonate).
Abstract: A polysiloxane-polyester block copolymer is provided, which comprises: (i) a siloxane resin block comprising: a siloxane unit represented by the formula: R1SiO3/2, wherein R1 is a monovalent hydrocarbon group, and comprising optionally a siloxane unit represented by the formula: SiO4/2; (ii) a siloxane linear block represented by the formula: (R22SiO2/2)n, wherein each R2 is independently a monovalent hydrocarbon group, and “n” is a positive number of at least 5; and (iii) a polyester block. The polysiloxane-polyester block copolymer can be used for a protective coating on a substrate which is made of aluminum, stainless steel, iron, plastics or glass to provide durable heat-resistance, hot hardness, release and anti-graffiti properties.
Abstract: A pressure sensitive adhesive composition can cure via hydrosilylation to form a pressure sensitive adhesive. The pressure sensitive adhesive composition may be coated on a substrate and cured to form a protective film. The protective film is useful in flexible OLED device fabrication processes, e.g., for protection of passivation layers.
Type:
Grant
Filed:
October 17, 2018
Date of Patent:
January 10, 2023
Assignee:
Dow Silicones Corporation
Inventors:
Wonbum Jang, Kyung Dong Han, Bo Kyung Bona Kim
Abstract: Described herein are thermal condensation reactors and processes of using the same. A presently described thermal condensation reactor includes a heat transfer chamber, wherein the heat transfer chamber is a fluidized bed having a fluidization gas flow in a first direction, and wherein the heat transfer chamber has a plurality of heating zones that may be maintained at different temperatures, and a plurality of reaction tubes disposed in the heat transfer chamber in a second direction perpendicular to the fluidization gas flow, each reaction tube having a reactant gas flow that passes through the plurality of heating zones.
Type:
Application
Filed:
September 30, 2020
Publication date:
December 22, 2022
Applicants:
DOW SILICONES CORPORATION, DOW GLOBAL TECHNOLOGIES LLC
Abstract: A room temperature curable sealant/adhesive composition is disclosed. The room temperature curable sealant/adhesive composition comprises: A) one or more organopolysiloxanes; B) a hydrophilic material; C) a cross-linker; D) a titanate catalyst and/or a zirconate catalyst; and E) one or more optional ingredients. A silicone elastomer formed therefrom and related methods are also disclosed. In general, such compositions (upon several hours of contact with water) do not repel water, but rather retain and pick-up water and/or can be wetted by aqueous materials subsequent to exposure.
Type:
Grant
Filed:
December 23, 2020
Date of Patent:
November 29, 2022
Assignee:
DOW SILICONES CORPORATION
Inventors:
Tommy Detemmerman, Tatiana Dimitrova, Frederic Gubbels
Abstract: A method of adhering a cosmetic pressed powder product or a stick type applicative product (e.g. a lipstick) inside a receptacle therefor is disclosed. The receptacle comprises a casing having a top end and a base end with a receiving base member disposed at the base end, and the receiving base member has an inner surface. The base member may be designed or adapted to be moveable inside the casing to advance and retract the product. The method comprises applying a silicone hot melt adhesive composition in liquid form to at least part of the inner surface of the receiving base member; inserting the product into the receiving base member on or in the silicone hot melt adhesive composition while still in liquid form; and cooling, and optionally curing, the silicone hot melt adhesive to adhere the product inside the receptacle. Retained-products formed via the method are also disclosed.
Type:
Grant
Filed:
July 6, 2018
Date of Patent:
November 29, 2022
Assignee:
DOW SILICONES CORPORATION
Inventors:
Glenn V. Gordon, Bartley D. Maxon, Rochelle A. Nesbitt
Abstract: A handling additive composition is disclosed. The composition is useful to improve handling of silicone elastomers prepared from polydiorganosiloxanes and silicone elastomers made therewith.
Type:
Grant
Filed:
July 27, 2018
Date of Patent:
November 22, 2022
Assignee:
DOW SILICONES CORPORATION
Inventors:
Yusheng Chen, Shaohui Wang, Rui Wang, Mark D. Fisher
Abstract: A method for preparing a product includes combining starting materials including A) a siloxane oligomer having silicon bonded hydrogen atoms, B) an alkoxysilane having at least one aliphatically unsaturated group capable of undergoing hydrosilylation reaction and C) a cobalt catalyst. The method can be used to produce a compound of formula (I). This compound can be used in a hydrosilylation reaction with a vinyl-functional polyorganosiloxane. The resulting product includes an ethyltrimethoxysilyl functional polyorganosiloxane useful in condensation reaction curable sealant compositions.
Type:
Grant
Filed:
June 26, 2018
Date of Patent:
November 8, 2022
Assignee:
Dow Silicones Corporation
Inventors:
John Gohndrone, Matthew Olsen, Xiaoyuan Zhou, William Johnson, Christine Marchand
Abstract: A composition contains a blend of linear and resinous alkenyl functionalized polyorganosiloxanes, a blend of linear and resinous silyl hydride functionalized polyorganosiloxanes, and a hydrosilylation catalyst where the linear silyl hydride functionalized polyorganosiloxanes has a ratio of D/DH that is greater than 2.0 and less than 14, the molar and the ratio of silyl hydride hydrogens to the sum of terminal alkenyl functionality on the alkenyl functionalized polyorganosiloxane is 1.2-2.2.
Type:
Grant
Filed:
December 2, 2020
Date of Patent:
November 8, 2022
Assignees:
Dow Silicones Corporation, Dow Global Technologies LLC
Inventors:
Michelle Cummings, Joel P. McDonald, Jason D. Suhr, Bradley W. Tuft, Brian Clark, Rachel Rademacher
Abstract: A method and apparatus for removing an organosilicon component from a mixture are disclosed. The method and apparatus employ a copolymer of a di-alkenyl functional aromatic hydrocarbon and a polyorganosiloxane as the sorbent.
Type:
Grant
Filed:
February 28, 2018
Date of Patent:
November 8, 2022
Assignee:
Dow Silicones Corporation
Inventors:
Dongchan Ahn, Aaron Greiner, Robert Huber, James Thompson
Abstract: A method for forming thermally conductive composition on electronic components comprises three steps, (I) preparing a silicone composition comprising (A) a polyorganosiloxane, (B) a thermally conductive filler and (C) a catalyst, (II) applying the silicone composition on an electronic component of electronic devices, the electronic component generates heat when the electronic devices are working and (III) curing the silicone composition by heat generated by the electronic component.
Type:
Grant
Filed:
January 11, 2018
Date of Patent:
November 1, 2022
Assignee:
Dow Silicones Corporation
Inventors:
Peng Wei, Fengyi Su, Yan Zheng, Dorab Bhagwagar, Debo Hong, Danhuan Ma, Junmin Zhu
Abstract: A silicone pressure-sensitive adhesive composition is disclosed. The composition can be cured into a pressure-sensitive adhesive having a good release force against a release liner and a high peel force against several substrates. The silicone pressure-sensitive adhesive composition comprises: (A) a diorganopolysiloxane having on average at least 0.5 alkenyl groups with 2 to 12 carbon atoms per molecule; (B) an organopolysiloxane composed of R13SiO1/2 and SiO4/2 units, wherein each R1 represents a monovalent hydrocarbon group with 1 to 12 carbon atoms, having a molar ratio (R13SiO1/2 unit)/(SiO4/2 unit) of 0.6 to 1.7, and having a number average molecular weight (Mn) converted to standard polystyrene of from 1,700 to 3,000; (C) an organohydrogenpolysiloxane having on average at least two silicon-bonded hydrogen atoms per molecule; and (D) a hydrosilylation catalyst.
Type:
Grant
Filed:
August 16, 2018
Date of Patent:
November 1, 2022
Assignee:
DOW SILICONES CORPORATION
Inventors:
Ho-Jin Choi, Sun-Hee Kim, Min-Cheol Jeon
Abstract: The present invention relates to fabric care compositions comprising a silicone based material cured via a condensation cure chemistry, and at least one fabric care ingredient, in an acceptable medium. Also disclosed is a process to prepare the fabric care compositions and uses of said fabric care compositions.
Abstract: A formaldehyde free adhesive composition and a plywood obtained from the adhesive composition is provided, and the plywood has a balanced performance, such as high adhesion strength, sufficient pot-life, and good workability.
Type:
Grant
Filed:
March 7, 2019
Date of Patent:
November 1, 2022
Assignees:
Dow Global Technologies LLC, Dow Silicones Corporation
Inventors:
Shi Pan, Minbiao Hu, Tong Sun, Xuemei Zhai, Shaoguang Feng, Yan Li, Jingui Jiang
Abstract: A silicone pressure sensitive adhesive composition is curable to form a silicone pressure sensitive adhesive. The silicone pressure sensitive adhesive composition can be coated on a substrate and cured to form a protective film. The protective film can be adhered to an anti-fingerprint coating on display glass, such as cover glass for a smartphone.
Abstract: A lamination process is disclosed. The process is useful for silicone based lamination adhesive compositions, in particular those which cure at or around room temperature.
Type:
Grant
Filed:
February 7, 2018
Date of Patent:
October 25, 2022
Assignee:
DOW SILICONES CORPORATION
Inventors:
Frederic Gubbels, Victor Baily, Gregory Chambard, Guy Beaucarne
Abstract: Thio(di)silanes comprising a thiosilane of formula (A): (R1aR1bR1cCS)s(Si)XxHh (A) wherein subscript s is from 2 to 4 or a thiodisilane of formula (I): (R1aR1bR1cCS)s(R22N)(Si—Si)XxHh (I) wherein subscript s is from 1 to 6, and wherein R1a, R1b, R1c, R2, X and subscripts n, x and h are defined herein. Also compositions comprising same, methods of making and using same, intermediates useful in synthesis of same, films and materials prepared therefrom.
Type:
Grant
Filed:
October 10, 2017
Date of Patent:
October 25, 2022
Assignee:
DOW SILICONES CORPORATION
Inventors:
Noel Mower Chang, Byung K. Hwang, Brian David Rekken, Vasgen Aram Shamamian, Xianghuai Wang, Xiaobing Zhou