EP0110370B1
Expired / Lapsed
EP
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A process for preparing a one-component organopolysiloxane composition
Assignee: Wacker Chemical Corp
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Filing: 1983-11-29
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Granted: 1987-04-22
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Expires: 2003-11-29
Abstract
Abstract A process for preparing a one-component organopolysiloxane composition which comprises heating a catalyst which is capable of promoting the addition of silicon-bonded hydrogen to aliphatically unsaturated groups in the presence of an organo polysiloxane having aliphatically unsaturated groups and/or a filler at an elevated temperature and thereafter adding an organosilicon compound having silicon-bonded hydrogen to the mixture after it has cooled. The resultant composition, which can be stored at room temperature can be crosslinked by heating to a temperature of about 100 DEG C or more.
Inventors
- 👤 Ming Shen
- 👤 Richard C. Mcafee
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 03:20
CPC Classifications
C; C08; C08L; C08L83/00; C08L83/04; C08G; C08G77/00; C08G77/04; C08G77/12; C08G77/20
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
133 words
A process for preparing a stable one-component composition which is capable of being cured to an elastomer, based on an organopolysiloxane having silicon-bonded aliphatically unsaturated groups, a crosslinking agent consisting of an organosilicon compound having silicon-bonded hydrogen atoms and a catalyst being capable of promoting the addition of silicon-bonded hydrogen to silicon-bonded aliphatically unsaturated groups and optionally a filler characterized in that (A) a mixture containing at least half of the catalyst and at least half of the organopolysiloxane having silicon-bonded aliphatically unsaturated groups and/or at least half of the filler is heated to a temperature of at least 70°C and thereafter (B) the organosilicon compound having at least 2 silicon-bonded hydrogen atoms per molecule is added to the mixture at a temperature below that at which crosslinking of the organopolysiloxane will occur.
Claim 2
Dependent Claim
133 words
A process for preparing a stable one-component composition which is capable of being cured to an elastomer, based on an organopolysiloxane having silicon-bonded aliphatically unsaturated groups, a crosslinking agent consisting of an organosilicon compound having silicon-bonded hydrogen atoms and a catalyst being capable of promoting the addition of silicon-bonded hydrogen to silicon-bonded aliphatically unsaturated groups and optionally a filler characterized in that (A) a mixture containing at least half of the catalyst and at least half of the organopolysiloxane having silicon-bonded aliphatically unsaturated groups and/or at least half of the filler is heated to a temperature of at least 70°C and thereafter (B) the organosilicon compound having at least 2 silicon-bonded hydrogen atoms per molecule is added to the mixture at a temperature below that at which crosslinking of the organopolysiloxane will occur.
Claim 3
Dependent Claim
23 words
Process according to Claim 1 characterized in that an organopolysiloxane is used which contains at least two silicon-bonded aliphatically unsaturated groups per molecule.
Claim 4
Dependent Claim
28 words
Process according to Claim 1 characterized in that up to 200 percent by weight of a filler based on the total weight of the organopolysiloxane components are used.
Claim 5
Dependent Claim
83 words
Process according to Claim 3, characterized in that in step (A) at least half of the catalyst and at least half of the organopolysiloxane are heated or at least half of the catalyst, the organopolysiloxane and the filler are heated or at least half of the catalyst and at least half ofthe filler are heated and the resultant mixture is cooled prior to the addition of the remainder of the catalyst, the organopolysiloxane and/or the filler and/or the organosilicon compound in step (B).
Claim 6
Dependent Claim
37 words
Process according to Claim 1 and 4, characterized in that after the heating step (A) has been carried out the resultant mixture is cooled below 60°C prior to the addition of the organosilicon compound in step (B).
Claim 7
Dependent Claim
34 words
Employment of the stable one-component composition as prepared according to any of the preceding claims for curing to an elastomer by heating said composition to a temperature of at least 100°C to promote crosslinking.
References Cited (Backward Citations)
No citation records indexed.
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