GB920036A - Improvements in or relating to elastomers - Google Patents

Improvements in or relating to elastomers

Info

Publication number
GB920036A
GB920036A GB2695261A GB2695261A GB920036A GB 920036 A GB920036 A GB 920036A GB 2695261 A GB2695261 A GB 2695261A GB 2695261 A GB2695261 A GB 2695261A GB 920036 A GB920036 A GB 920036A
Authority
GB
United Kingdom
Prior art keywords
oac
silane
mgo
formula
siloxane
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
GB2695261A
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 GB920036A publication Critical patent/GB920036A/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
    • 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
    • C08G77/22—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen and oxygen
    • C08G77/24—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen and oxygen halogen-containing 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
    • C08G77/22—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen and oxygen
    • C08G77/26—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen and oxygen nitrogen-containing 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

Landscapes

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

Abstract

An elastomer is made by reacting (a) a siloxane of the formula HO[SiR2O]nH, (b) a silane of the formula R1Si(OAc)3 or Si(OAc)4 in amount such that there is at least 0,33 mol. of R1Si(OAc)3 or at least 0,25 mol. of Si(OAc)4 per mol. of Si-bonded OH group in siloxane (a), and (c) MgO in amount such that there is at least 1,5 mols. of MgO per mol. of silane (b), wherein each Ac is a saturated aliphatic monoacyl radical derived from a carboxylic acid, each R and R1 is a monovalent hydrocarbon or halogenated hydrocarbon (saturated or unsaturated) or cyanoalkyl radical, and n is an integer of at least 5. In a modification, a part of siloxane (a) may be reacted at room temperature with silane (b) to form a reactive intermediate (d) of the formula (AcO)2SiR1O[R2SiO]nSiR1(OAc)2 or (AcO)3SiO[R2SiO]nSi(OAc)3, which can be substituted for silane (b) in the elastomer-forming process. Reaction occurs spontaneously upon mixing the above reactants, usually at a temperature within the range of 15 DEG to 100 DEG C., to produce a cured rubber. Plasticizers, dielectric materials, oxidation inhibitors, heat stability additives, pigments and fillers such as reinforcing silica fillers which have been hydrophobed as described in Specification 699,759, may also be added. In typical examples (1) methyl triacetoxy silane and MgO were added to a base composition consisting of two liquid 3.3.3-trifluoropropylmethyl siloxanes, one having terminal OH groups and the other terminal methyl radicals, a hydrophobed reinforcing silica and powdered Al, and the resulting mixture was poured into a container and cured in 18 hours at room temperature; and (6) MgO and HO[Si(CH3)2O]300H were dispersed in a petroleum ether solution of a gum of the formula HO[Si(CH3)2O]3000H, a trimethylsilyl-surface modified SiO2 and methyl triacetoxysilane and the resulting composition cured, after application to a metal panel, to a tough rubber in 18 hours at 200 DEG C. Uses: For caulking or potting. Specifications 835,790 and 856,321 also are referred to.
GB2695261A 1960-08-01 1961-07-25 Improvements in or relating to elastomers Expired GB920036A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US4632760A 1960-08-01 1960-08-01

Publications (1)

Publication Number Publication Date
GB920036A true GB920036A (en) 1963-03-06

Family

ID=21942862

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2695261A Expired GB920036A (en) 1960-08-01 1961-07-25 Improvements in or relating to elastomers

Country Status (2)

Country Link
DE (1) DE1244414B (en)
GB (1) GB920036A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3527771A1 (en) 2014-07-28 2019-08-21 Dow Silicones Corporation Panelized shadow box

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3914199A (en) * 1973-10-12 1975-10-21 Dow Corning Acetoxsilicon adhesion promoter and primer composition

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2934519A (en) * 1960-04-26 Room temperature curing silicone
DE1894C (en) * H. HILDEBRAND in Glashütte Scheckthal bei Wittichenau Ice bottle with removable glass bottom
DE2831C (en) * J. WEIDMANN, Fabrikant, in Wien Process of decorating pressed leather objects by attaching colored fabrics and painting them

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3527771A1 (en) 2014-07-28 2019-08-21 Dow Silicones Corporation Panelized shadow box

Also Published As

Publication number Publication date
DE1244414B (en) 1967-07-13

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