GB1111213A - Organopolysiloxane release material - Google Patents

Organopolysiloxane release material

Info

Publication number
GB1111213A
GB1111213A GB128/66A GB12866A GB1111213A GB 1111213 A GB1111213 A GB 1111213A GB 128/66 A GB128/66 A GB 128/66A GB 12866 A GB12866 A GB 12866A GB 1111213 A GB1111213 A GB 1111213A
Authority
GB
United Kingdom
Prior art keywords
units
average value
block copolymer
weight
release material
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
GB128/66A
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.)
Dow Silicones Corp
Original Assignee
Dow Corning Corp
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 Dow Corning Corp filed Critical Dow Corning Corp
Publication of GB1111213A publication Critical patent/GB1111213A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • A—HUMAN NECESSITIES
    • A21—BAKING; EDIBLE DOUGHS
    • A21D—TREATMENT, e.g. PRESERVATION, OF FLOUR OR DOUGH, e.g. BY ADDITION OF MATERIALS; BAKING; BAKERY PRODUCTS; PRESERVATION THEREOF
    • A21D8/00—Methods for preparing or baking dough
    • A21D8/08—Prevention of sticking, e.g. to baking plates
    • 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
    • C08L83/10—Block- or graft-copolymers containing polysiloxane sequences
    • 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
    • C08G77/14—Polysiloxanes containing silicon bound to oxygen-containing groups
    • C08G77/16—Polysiloxanes containing silicon bound to oxygen-containing groups to hydroxyl 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
    • C08G77/04—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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31652—Of asbestos
    • Y10T428/31663—As siloxane, silicone or silane

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Paints Or Removers (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

A release material suitable for coating the inside of ovens consists essentially of a mixture of (A) 15 to 95% by weight of a diorganopolysiloxane: Rn(OH)mSi 4-n-m/2 ; R is a monovalent alkyl, alkenyl or aryl radical, n has an average value of 1.98-2.0024, m has an average value not > 0.02 and m+n is not > 2.0024; the polymer has a viscosity of at least 50,000 c.s. at 25 DEG C.; at least 90% of the R's are methyl and not more than 2% are alkenyl, together with (B) from 5 to 85% by weight of a block copolymer consisting essentially of: (i) polymer blocks: [(CH3)2SiO]s[R12SiO]t [R1SiO1.5]u, each R1 is Me, Et, vinyl or phenyl, s+t+u has an average value of 6 to 100 and t and u each has a value up to 10% of s+t+u, and (ii) polymer blocks: (C6H5)q(CH3)w SiO 4-w-q/2 , w has an average value up to 0.25 and q from 1 to 1.25; q+w is not > 1.25. The siloxane units (i) comprise 10 to 75 mol per cent and the siloxane units (ii) from 25 to 90 mole per cent of the block copolymer. In preferred examples the diorganopolysiloxane (A) is either a hydroxyl or trimethysiloxy terminated dimethylpolysiloxane. In the block copolymer, units (i) are preferably dimethylsiloxane units and units (ii) are mainly monophenylsiloxane units with up to 25 mol per cent of other units such as phenylmethylsiloxane, monomethylsiloxane and diphenylsiloxane. The release material may be applied from an aerosol package when it is dissolved in an organic halogenated solvent (e.g. chloroelcane, CFCl3 or CF2Cl2) in an amount of 0.1 to 20% by weight together with an aerosol propellant. It may also be supplied as an aqueous emulsion.ALSO:A release material which is coated on the inside surface of ovens e.g. of enamel consists essentially of a mixture of (A) 15 to 95% by weight of a diorganopolysiloxane: Rn (OH)m Si4-n-m/2; R is a monovalent alkyl, alkenyl or aryl radical, n has an average value 1.98-2.0024, m has an average value not > 0.02 and m +n is not > 2.0024; the polymer has a viscosity of at least 50,000 c.s. at 25 DEG C; at least 90% of the R1S are methyl and not more than 2% are alkenyl, together with (B) from 5 to 85% by weight of a block copolymer consisting essentially of: (i) polymer blocks: [(CH3)2SiO]s [R1SiO]t [R1SiO1,5]u each R1 is Me, Et, vinyl or phenyl, s + t + u has an average value of 6 to 100 and t and u each has a value up to 10% of s + t + u, and (ii) polymer blocks: (C6H5)q(CH3)wSiO (C6H5) (CH3) SiO.4-w-a/2 w has an average value up to 0.25 and a from 1 to 1.25; q + w is not > 1.25. The siloxane units (i) comprise 10 to 75 mol % and the siloxane units (ii) from 25 to 90 mole % of the block copolymer. In preferred examples the diorganopolysiloxane (A) is either a hydroxyl or trimethylsiloxy terminated dimethylpolysiloxane. In the block copolymer, units (i) are preferably dimethylsiloxane units and units (ii) are mainly monophenylsiloxane units with up to 25 mol % of other units such as phenylmethylsiloxane, monomethylsiloxane and diphenylsiloxane. The release material may be applied from an aerosol package when it is dissolved in an organic halogenated solvent (e.g. chloroelcane, CFCl3 or CF2Cl2) in an amount of 0.1 to 20% by weight together with an aerosol propellant. It may be applied as an aqueous emulsion. It may also be applied from a pretreated cloth.
GB128/66A 1965-01-04 1966-01-03 Organopolysiloxane release material Expired GB1111213A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US42338465 US3308080A (en) 1965-01-04 1965-01-04 Release coating compositions comprising a diorganopolysiloxane and an organosiloxane block copolymer

Publications (1)

Publication Number Publication Date
GB1111213A true GB1111213A (en) 1968-04-24

Family

ID=23678712

Family Applications (1)

Application Number Title Priority Date Filing Date
GB128/66A Expired GB1111213A (en) 1965-01-04 1966-01-03 Organopolysiloxane release material

Country Status (8)

Country Link
US (1) US3308080A (en)
AT (1) AT273846B (en)
CH (1) CH465863A (en)
DE (1) DE1278055B (en)
FR (1) FR1464216A (en)
GB (1) GB1111213A (en)
IT (1) IT941494B (en)
NL (1) NL6517230A (en)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3433750A (en) * 1966-01-19 1969-03-18 Twenty Nine West Fifteenth Str Novel water-repellent compositions
GB1216194A (en) * 1967-03-03 1970-12-16 Midland Silicones Ltd Improvements in or relating to metal substrates coated with silicone rubber
US3686355A (en) * 1970-05-08 1972-08-22 Gen Electric Shaped composition of polymer and surface modifying block copolymer additive and method
US3784404A (en) * 1972-01-12 1974-01-08 Amchem Prod Method for protecting painted work-pieces in a bake oven
FR2179639B1 (en) * 1972-04-14 1978-03-03 Rhone Poulenc Ind
US4042643A (en) * 1974-11-15 1977-08-16 Imperial Chemical Industries Limited Organopolysiloxane compositions
US4049873A (en) * 1975-01-28 1977-09-20 Imperial Chemical Industries Limited Surface treating compositions
US4144216A (en) * 1975-05-19 1979-03-13 Dow Corning Corporation Room temperature vulcanizable organic solvent dispersions of silicone elastomers
US4105617A (en) * 1975-05-19 1978-08-08 Dow Corning Corporation Organic solvent dispersions of silicone elastomers
US4121000A (en) * 1976-03-05 1978-10-17 E. I. Du Pont De Nemours And Company Coating composition comprising a polysiloxane resin-forming precondensate, a fluorocarbon polymer, an epoxy resin, a silicone fluid, and an inorganic hardening agent
EP0017958B1 (en) * 1979-04-24 1982-11-10 Th. Goldschmidt AG Preparation for the anti-adhesive coating of baking tins, baking moulds, pans, metal pots and the like
DE3038982A1 (en) * 1980-10-15 1982-05-27 Bayer Ag, 5090 Leverkusen DEFOAMERS FOR PLASTIC DISPERSIONS AND DISPERION COATING MATERIALS AND METHOD FOR THE PRODUCTION THEREOF
US4477517A (en) * 1982-09-29 1984-10-16 E. I. Du Pont De Nemours And Company Multilayer silicone coating
US4585705A (en) * 1983-11-09 1986-04-29 Dow Corning Corporation Hard organopolysiloxane release coating
US4681908A (en) * 1983-11-09 1987-07-21 Dow Corning Corporation Hard organopolysiloxane release coating
JPS612784A (en) * 1984-06-14 1986-01-08 Toyoda Gosei Co Ltd Spray can packed with water-repellent surface treatment
US6245431B1 (en) 1999-09-20 2001-06-12 General Electric Company Bakeware release coating
US8951951B2 (en) 2004-03-02 2015-02-10 Troxler Electronic Laboratories, Inc. Solvent compositions for removing petroleum residue from a substrate and methods of use thereof
US8367739B2 (en) * 2004-12-29 2013-02-05 Troxler Electronic Laboratories, Inc. Asphalt release agent

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2793197A (en) * 1956-01-10 1957-05-21 Gen Electric Food release composition consisting of two incompatable organopolysiloxanes
US2833441A (en) * 1957-01-24 1958-05-06 Dow Corning Siloxane coated cooking utensils
US3002946A (en) * 1957-11-25 1961-10-03 Dow Corning Coating composition of polysiloxane resin and two polysiloxane fluids
US3202542A (en) * 1961-06-06 1965-08-24 Peninsular Silicones Inc Release coating containing a polyorganosiloxane resin and either a polyorganosiloxane gum or a high viscosity polyorganosiloxane oil
US3231532A (en) * 1963-02-18 1966-01-25 Gen Electric Organopolysiloxane system

Also Published As

Publication number Publication date
AT273846B (en) 1969-08-25
NL6517230A (en) 1966-07-05
FR1464216A (en) 1966-12-30
IT941494B (en) 1973-03-01
US3308080A (en) 1967-03-07
DE1278055B (en) 1968-09-19
CH465863A (en) 1968-11-30

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