GB920036A - Improvements in or relating to elastomers - Google Patents
Improvements in or relating to elastomersInfo
- 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
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.
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)
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)
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)
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 |
-
1961
- 1961-07-25 GB GB2695261A patent/GB920036A/en not_active Expired
- 1961-07-28 DE DE1961D0036683 patent/DE1244414B/en active Pending
Cited By (1)
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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