GB809166A - Improvements in or relating to heat-resistant high tensile silicone rubber gum compositions and method of vulcanizing them - Google Patents
Improvements in or relating to heat-resistant high tensile silicone rubber gum compositions and method of vulcanizing themInfo
- Publication number
- GB809166A GB809166A GB18984/56A GB1898456A GB809166A GB 809166 A GB809166 A GB 809166A GB 18984/56 A GB18984/56 A GB 18984/56A GB 1898456 A GB1898456 A GB 1898456A GB 809166 A GB809166 A GB 809166A
- Authority
- GB
- United Kingdom
- Prior art keywords
- siloxane
- sulphur
- parts
- per
- vulcanizing
- 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
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/36—Sulfur-, selenium-, or tellurium-containing compounds
- C08K5/39—Thiocarbamic acids; Derivatives thereof, e.g. dithiocarbamates
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)
Abstract
A composition comprises (1) an organopolysiloxane convertible to the solid elastic state and having from 1.95 to 2 hydrocarbon radicals per Si atom; (2) a powdered filler capable of vulcanizing the siloxane and consisting essentially of substrate particles of silica in a supercolloidal state of subdivision having bound thereto alkoxy groups through Si-O-C bonds and the carbon attached to oxygen is also attached to hydrogen, the substrate particles having an average surface area from 250 to 400 square metres per gram; and (3) from 0.01 to 6.0 per cent by weight of (1) of tetramethylthiuramdisulphide, tetraethylthiuramdisulphide or dialkyldithiocarbamate derivatives of the formula <FORM:0809166/IV (a)/1> where R is an alkyl radical, M is Na, Bi, Zn, Pb, Te, Se, another <FORM:0809166/IV (a)/2> radical, the radical <FORM:0809166/IV (a)/3> an organic cation, piperidinium or sulphur, and n is an integer from 1 to 4 depending on the valency of M. The filler is preferably used in amount of 10 to 70 parts per 100 parts of siloxane. Antioxidants may also be added in amount of 0.1 to 6.0 parts per 100 parts of siloxane. Many examples of curing accelerators (3) and antioxidants are given. In examples methylvinyl-, ethylvinyl-, dimethyl- and methylphenyl-siloxane gums are compounded with the silica fillers, specified curing accelerators with or without sulphur, and vulcanized. Comparative examples are given in which sulphur or benzoyl peroxide is used as the curing accelerator. Zinc oxide is preferably added where dialkthiocarbamate derivatives are used as curing accelerators. Specifications 751,282, 762,180, 790,370, 801,134 and U.S.A. Specifications 2,657,149 and 2,727,876 are referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US809166XA | 1955-06-29 | 1955-06-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB809166A true GB809166A (en) | 1959-02-18 |
Family
ID=22160474
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB18984/56A Expired GB809166A (en) | 1955-06-29 | 1956-06-19 | Improvements in or relating to heat-resistant high tensile silicone rubber gum compositions and method of vulcanizing them |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB809166A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2487324A1 (en) * | 1980-07-24 | 1982-01-29 | Sumitomo Chemical Co |
-
1956
- 1956-06-19 GB GB18984/56A patent/GB809166A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2487324A1 (en) * | 1980-07-24 | 1982-01-29 | Sumitomo Chemical Co |
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