GB852820A - Improved vulcanisable silicone rubber stock - Google Patents

Improved vulcanisable silicone rubber stock

Info

Publication number
GB852820A
GB852820A GB4151/57A GB415157A GB852820A GB 852820 A GB852820 A GB 852820A GB 4151/57 A GB4151/57 A GB 4151/57A GB 415157 A GB415157 A GB 415157A GB 852820 A GB852820 A GB 852820A
Authority
GB
United Kingdom
Prior art keywords
siloxane
except
butylperbenzoate
copolymer
replaced
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
GB4151/57A
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.)
Wacker Chemie AG
Original Assignee
Wacker Chemie AG
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 Wacker Chemie AG filed Critical Wacker Chemie AG
Publication of GB852820A publication Critical patent/GB852820A/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
    • C08G77/18—Polysiloxanes containing silicon bound to oxygen-containing groups to alkoxy or aryloxy 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
    • C08G77/42—Block-or graft-polymers containing polysiloxane sequences
    • C08G77/44—Block-or graft-polymers containing polysiloxane sequences containing only 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
    • C08G77/70—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)

Abstract

A vulcanisable siloxane composition comprises (1) an organic solvent soluble linear polysiloxane of the unit formula RR 1SiO, in which R is an alkyl radical and R1 is an alkyl or aryl radical, (2) from 1 to 10% by weight of (1) of a liquid siloxane resin having the average general formula (R1O)n R1m SiO 4-n-m,/2 wherei n has a value from 0,5 to 0,9 and m has a value from 1,1 to 1,8, (3) a silica filler having a pore volume of at least 4 c.c per gram and a heat of wetting by water of from 0,3 to 1,0 calorie per cc. of pore volume, and (4) an organic peroxide vulcanising agent. Pigments and other additives may also be added. Vulcanising agents specified are benzoyl-, monochlorobenzoyl- and 2 : 4-dichlorobenzoyl-peroxides and t-butylperbenzoate. In examples compositions consist of (1) a dimethylpolysiloxane of molecular weight of about 350,000, fume silica of the above characteristics, benzoyl peroxide and a liquid methylsiloxane (CH3 : Si = 1 : 2 : 1) containing 8% of ethoxy groups; (2) as in (1) except that the methyl-ethoxy siloxane is replaced by a copolymer of monophenyl-, dimethyl- and diphenylsiloxane units and containing 10% of ethoxy groups; (3) as in (1) except that the dimethylsiloxane is replaced by a copolymer of dimethyland phenylmethyl-siloxane units; and (4) as in (1) except that the vulcanising agent is t-butylperbenzoate or 2 : 4-dichlorobenzoylperoxide. U.S.A. Specification 2,541,137 is referred to.
GB4151/57A 1956-02-06 1957-02-06 Improved vulcanisable silicone rubber stock Expired GB852820A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE852820X 1956-02-06

Publications (1)

Publication Number Publication Date
GB852820A true GB852820A (en) 1960-11-02

Family

ID=6785911

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4151/57A Expired GB852820A (en) 1956-02-06 1957-02-06 Improved vulcanisable silicone rubber stock

Country Status (1)

Country Link
GB (1) GB852820A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4145505A (en) 1977-05-13 1979-03-20 Akzona Incorporated Cross-linkable organopolysiloxane compositions and a process for cross-linking organopolysiloxanes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4145505A (en) 1977-05-13 1979-03-20 Akzona Incorporated Cross-linkable organopolysiloxane compositions and a process for cross-linking organopolysiloxanes

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