(19) |
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(11) |
EP 1 870 443 A8 |
(12) |
CORRECTED EUROPEAN PATENT APPLICATION |
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Note: Bibliography reflects the latest situation |
(15) |
Correction information: |
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Corrected version no 1 (W1 A2) |
(48) |
Corrigendum issued on: |
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30.06.2010 Bulletin 2010/26 |
(88) |
Date of publication A3: |
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12.08.2009 Bulletin 2009/33 |
(43) |
Date of publication: |
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26.12.2007 Bulletin 2007/52 |
(22) |
Date of filing: 10.05.2001 |
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(51) |
International Patent Classification (IPC):
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(84) |
Designated Contracting States: |
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DE FR GB |
(30) |
Priority: |
23.06.2000 US 213700 P 11.08.2000 US 638409
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(62) |
Application number of the earlier application in accordance with Art. 76 EPC: |
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01933248.5 / 1299498 |
(71) |
Applicant: GENERAL ELECTRIC COMPANY |
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Schenectady, NY 12345 (US) |
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(72) |
Inventors: |
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- Griswold, Roy, Melvin
New York 12020 (US)
- Traver, Frank, John
New York 12180-9527 (US)
- Wengrovius, Jeffrey, H.
New York 12302 (US)
- Lin, Shaow, Burn
Michigan 48642 (US)
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(74) |
Representative: Thoma, Michael et al |
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Lorenz - Seidler - Gossel
Widenmayerstraße 23 80538 München 80538 München (DE) |
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Remarks: |
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This application was filed on 27 - 08 - 2007 as a divisional application to the application
mentioned under INID code 62. |
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(54) |
Silicone pressure sensitive adhesive composition |
(57) The present inventions relates to a method for making an article, comprising applying
a layer of a silicone composition on at least a portion of at least one surface of
a substrate, said silicone composition comprising the condensation reaction product
of a silanol-functional silicone resin, said resin comprising M structural units according
to the R
13SiO
1/2, wherein each R
1 is independently hydroxy or a monovalent hydrocarbon radical, and Q structural units
according to the formula SiO
4/2 in a ratio of M units to Q units of less than 1.1:1, a silanolfunctional polydiorganosiloxane
gum and a crosslinker, said silicone composition being obtained by a method comprising:
condensing, at an elevated temperature in the presence of a base catalyst, said silanol-functional
silicone resin, and
(a) heating a mixture of the resin, gum, crosslinker, base catalyst an an organic
solvent to a first elevated temperature to begin condensation of the resin, gum and
crosslinker,
(b) adding a molar excess, based on moles of alkoxy groups of the resin, gum and crosslinker
of the mixture of step (a), of water to the mixture of step (a),
(c) heating the mixture of step (b) to allow hydrolysis of any remaining alkoxy groups,
and
(d) heating the mixture of step (c) to a second elevated temperature to drive condensation
of the resin, gum and crosslinker toward completion.