GB932433A - Process for the manufacture of silicone resins - Google Patents

Process for the manufacture of silicone resins

Info

Publication number
GB932433A
GB932433A GB2503760A GB2503760A GB932433A GB 932433 A GB932433 A GB 932433A GB 2503760 A GB2503760 A GB 2503760A GB 2503760 A GB2503760 A GB 2503760A GB 932433 A GB932433 A GB 932433A
Authority
GB
United Kingdom
Prior art keywords
added
metal
resin
stage
resins
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
GB2503760A
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 GB932433A publication Critical patent/GB932433A/en
Expired legal-status Critical Current

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
    • C08K5/00—Use of organic ingredients
    • C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
    • C08K5/0025—Crosslinking or vulcanising agents; including accelerators
    • 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
    • C08G77/06—Preparatory processes
    • 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
    • C08G77/06—Preparatory processes
    • C08G77/08—Preparatory processes characterised by the catalysts used
    • 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
    • C08K5/04—Oxygen-containing compounds
    • C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
    • C08K5/098—Metal salts of carboxylic acids

Landscapes

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

Abstract

In a two-stage process for making a silicone resin from a low molecular weight siloxane resin, the first stage comprises heating a low molecular weight siloxane of the average general formula RnSiO 4-n/2 , in which R is a monovalent saturated or unsaturated hydrocarbon radical and n has an average value of 0,9 to 1,7, at a temperature within the range of 150 DEG to 325 DEG C. in the presence of 0,001 to 1,0% by weight, based on the weight of the siloxane resin, of a metal of Group Ia, VIa, VIIb or VIII of the Mendel<\>aeeff Periodic System, the metal being present as a metal salt or an organometal salt of a monocarboxylic acid, to produce a high molecular weight siloxane resin, and the second stage comprises curing the resin so produced. The metal salt may be added either before or during the oxidative condensation reaction. If desired the stage one resins may be freed of metals by washing with metal-fixing complex formers so that the ultimate resins may be metal-free, but metal salts may be added to the stage one resins to aid in developing the desired stage two resins. Salts specified are Fe and Cr stearates, Co ethylhexoate, Fe octoate, Cu acetate, Ni propionate and the naphthenates and octoates of Mo, W, Mn, Ni, Pd, Pt, Ag and Au. In a typical example (1) the resin obtained by hydrolysing a mixture of CH3.SiCl3 and (CH3)SiCl2 in aqueous methanol was divided into 5 parts; A served as a control; B contained 0,1% of Fe added as Fe octoate; C contained 0,1% of Cu added as Cu acetate; D contained 0,1% of Co added as Co ethyl hexoate; and E contained 0,1% of Cr added as Cr stearate. All five were heated at 250 DEG C. for 3 hours, polymerization occurring through condensation of residual -OH and -OCH3 groups but mainly through oxidation of -CH3 groups. Each resin was then dissolved in butyl acetate and the resulting solutions were applied to steel panels, air dried and aged by heating at 250 DEG C.; coating A crazed after 72 hours at 250 DEG C., whereas the others crazed after much longer periods at 250 DEG C. Specification 561,136 is referred to.
GB2503760A 1959-07-16 1960-07-18 Process for the manufacture of silicone resins Expired GB932433A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEW0026023 1959-07-16

Publications (1)

Publication Number Publication Date
GB932433A true GB932433A (en) 1963-07-24

Family

ID=7598226

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2503760A Expired GB932433A (en) 1959-07-16 1960-07-18 Process for the manufacture of silicone resins

Country Status (2)

Country Link
DE (1) DE1420830A1 (en)
GB (1) GB932433A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0003285A1 (en) * 1978-01-21 1979-08-08 Bayer Ag Process for preparing organopolysiloxanes having functional groups
EP1564227A1 (en) * 1999-04-09 2005-08-17 Dynal Biotech ASA Process for the preparation of monodisperse polymer particles
CN1311005C (en) * 1999-04-09 2007-04-18 迪纳尔生物技术公司 Process for the preparation of monodisperse polymer particles

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3238934A1 (en) * 1982-10-21 1984-04-26 Th. Goldschmidt Ag, 4300 Essen METHOD FOR CONDENSING POLYDIORGANOSILOXANEDIOLES

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0003285A1 (en) * 1978-01-21 1979-08-08 Bayer Ag Process for preparing organopolysiloxanes having functional groups
EP1564227A1 (en) * 1999-04-09 2005-08-17 Dynal Biotech ASA Process for the preparation of monodisperse polymer particles
CN1311005C (en) * 1999-04-09 2007-04-18 迪纳尔生物技术公司 Process for the preparation of monodisperse polymer particles

Also Published As

Publication number Publication date
DE1420830A1 (en) 1968-10-31

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