GB849885A - Organosiloxane gels - Google Patents

Organosiloxane gels

Info

Publication number
GB849885A
GB849885A GB20086/59A GB2008659A GB849885A GB 849885 A GB849885 A GB 849885A GB 20086/59 A GB20086/59 A GB 20086/59A GB 2008659 A GB2008659 A GB 2008659A GB 849885 A GB849885 A GB 849885A
Authority
GB
United Kingdom
Prior art keywords
viscosity
bonded
units
copolymer
platinic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB20086/59A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Midland Silicones Ltd
Original Assignee
Midland Silicones Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Midland Silicones Ltd filed Critical Midland Silicones Ltd
Publication of GB849885A publication Critical patent/GB849885A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
    • C08G77/04—Polysiloxanes
    • C08G77/12—Polysiloxanes containing silicon bound to hydrogen
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
    • C08G77/04—Polysiloxanes
    • C08G77/20—Polysiloxanes containing silicon bound to unsaturated aliphatic groups
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
    • C08G77/70—Siloxanes defined by use of the MDTQ nomenclature
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
    • C08L83/04—Polysiloxanes

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Silicon Polymers (AREA)

Abstract

A soft, non-friable, non-flowing but selfhealing gel may be made by reacting, in a liquid phase, (1) an organosiloxane having a viscosity of from 100 to 10,000 cs. at 25 DEG C. and being a p copolymer consisting essentially of R.ViSiO, R2SiO and CH3R2SiO0.5 units wherein each R is a methyl or phenyl radical and Vi is a vinyl radical, at least 0.174 molar per cent. of the units in the copolymer being R.ViSiO units, with (2) a liquid siloxane of the average general formula H.R.CH3.SiO(R2SiO)nSiCH3RH, wherein n has an average value of from 0 to 800 and each R is a methyl or phenyl radical, the viscosity of the siloxane being not more than 10,000 cs. at 25 DEG C. and not more than 25 molar per cent. of the total R radicals present in (1) and (2) being phenyl, in the presence of (3) a platinum catalyst in amount sufficient to furnish at least 0.1 part per million of Pt calculated on the sum of the weights of (1) and (2), the proportions of (1) and (2) being such that prior to the reaction there is an average of from 1.4 to 1.8 of the Si-bonded H atoms in (2) per molecule of (1) and there being at least one RViSiO unit in (1) for every Si-bonded H atom in (2), the molecular weight of (1) being calculated by the equation: log. visc. = 1,00 + 0,0123M,0,5 where M is the molecular weight and "visc." is the viscosity in cs. at 25 DEG C. of (1). Preferably siloxanes (1) and (2) should be free from Si-bonded OH groups. Catalysts specified are platinum per se or as deposited on silica gel or charcoal; platinic chloride and sulphate; potassium and sodium platinic chlorides; and chloro-platinic acid, preferably as the hexahydrate. The catalyst may be dissolved in a solvent, e.g. dimethyl carbitol or phthalate. Reaction between (1) and (2) can take place at room or preferably at elevated (e.g. 125 DEG to 165 DEG C.) temperature. For shipping and storage purposes, the chloroplatinic acid is mixed with copolymer (1) and this mixture is then diluted with the required amount of (2) just prior to using. Examples are given. Uses : for potting, filling or encapsulating electrical apparatus.
GB20086/59A 1958-06-30 1959-06-11 Organosiloxane gels Expired GB849885A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US849885XA 1958-06-30 1958-06-30

Publications (1)

Publication Number Publication Date
GB849885A true GB849885A (en) 1960-09-28

Family

ID=22188463

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20086/59A Expired GB849885A (en) 1958-06-30 1959-06-11 Organosiloxane gels

Country Status (1)

Country Link
GB (1) GB849885A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4448840A (en) * 1982-06-14 1984-05-15 Toray Silicone Company, Ltd. Method for manufacturing a rubber sheet which is electrically insulating and thermally radiating and rubber sheets made therefrom with improve resistance to flexural fatigue
EP0110370A1 (en) * 1982-11-29 1984-06-13 Stauffer-Wacker Silicones Corporation A process for preparing a one-component organopolysiloxane composition
US4486495A (en) * 1982-06-14 1984-12-04 Toray Silicone Co., Ltd. Method for manufacturing a rubber sheet which is electrically insulating and thermally radiating and rubber sheets made therefrom
US4991574A (en) * 1987-07-22 1991-02-12 Dow Corning Corporation Surgical dressing
EP0867575A2 (en) 1997-03-25 1998-09-30 Dow Corning S.A. A method of making a building element
US5928724A (en) * 1998-03-25 1999-07-27 Dow Corning S.A. Method of making a building element
US8101042B2 (en) 2003-11-13 2012-01-24 Dow Corning Corporation Method for adhering silicone gels to plastics
US11116929B2 (en) 2018-03-12 2021-09-14 3B Medical, Inc. Pediatric CPAP mask
US11565069B2 (en) 2017-10-09 2023-01-31 3B Medical, Inc. Mask with adhesive and method of making the same

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4448840A (en) * 1982-06-14 1984-05-15 Toray Silicone Company, Ltd. Method for manufacturing a rubber sheet which is electrically insulating and thermally radiating and rubber sheets made therefrom with improve resistance to flexural fatigue
US4486495A (en) * 1982-06-14 1984-12-04 Toray Silicone Co., Ltd. Method for manufacturing a rubber sheet which is electrically insulating and thermally radiating and rubber sheets made therefrom
EP0110370A1 (en) * 1982-11-29 1984-06-13 Stauffer-Wacker Silicones Corporation A process for preparing a one-component organopolysiloxane composition
US4991574A (en) * 1987-07-22 1991-02-12 Dow Corning Corporation Surgical dressing
EP0867575A2 (en) 1997-03-25 1998-09-30 Dow Corning S.A. A method of making a building element
US5928724A (en) * 1998-03-25 1999-07-27 Dow Corning S.A. Method of making a building element
US8101042B2 (en) 2003-11-13 2012-01-24 Dow Corning Corporation Method for adhering silicone gels to plastics
US11565069B2 (en) 2017-10-09 2023-01-31 3B Medical, Inc. Mask with adhesive and method of making the same
US11116929B2 (en) 2018-03-12 2021-09-14 3B Medical, Inc. Pediatric CPAP mask

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