Back to results
US 5,962,601 AGranted
Curable silicone composition
AssigneeDow Corning Toray Silicone Co., Ltd.
InventorsEnami Hiroji, Yuji Hamada, Akihiro Nakamura
Life of this patent
Estimating the term…
Abstract
A curable silicone composition cures to form a silicone cured product with improved fire-retarding, properties. The composition comprises a hydrosilylation-reaction curable silicone composition. Fire-retarding properties are imparted to the composition by using an additive comprising tetrafunctional and monofunctional siloxane units and a diamine compound. The silicone cured product is preferably a silicone gel.
Claims13
A curable silicone composition comprising:
- (A) 100 parts by weight of an organopolysiloxane having at least two silicon-bonded alkenyl groups per molecule, with the proviso that component (A) does not contain SiO.sub.4/2 units;
- (B) 0.01 to 20 parts by weight of an organopolysiloxane with a general formula:
- (R.sup.1.sub.3 SiO.sub.1/2).sub.a (SiO.sub.4/2).sub.1.0, where R.sup.1 is a substituted or non-substituted monovalent hydrocarbon group, and a is 0.5 to 4.0;
- (C) an organopolysiloxane having at least two silicon-bonded hydrogen atoms per molecule in an amount such that the quantity of the silicon-bonded hydrogen atoms in component (B) per mole of silicon-bonded alkenyl groups in components (A) and (B) is 0.1 to 5 moles,
- (D) an amount of a hydrosilylation reaction catalyst such that the content of platinum metal contained in the catalyst is 0.01 to about 1,000 ppm based on the weight of component (A), and
- (E) 0.0001 to 1.0 parts by weight of a diamine compound with a general formula:
- R.sup.3.sub.2 N--R.sup.2 --NR.sup.3.sub.2
- wherein each R.sup.3 is independently selected from the group consisting of alkyl groups of 1 to about 4 carbon atoms and hydrogen atoms, R.sup.2 is an alkylene group of 2 to about 4 carbon atoms.
5 more elements
A method for preparing a curable silicone composition comprising mixing a composition comprising:
- (A) 100 parts by weight of an organopolysiloxane having at least two silicon-bonded alkenyl groups per molecule,
- (B) 0.01 to 20 parts by weight of an organopolysiloxane with a general formula:
- (R.sup.1.sub.3 SiO.sub.1/2).sub.a (SiO.sub.4/2).sub.1.0, where R.sup.1 is a substituted or non-substituted monovalent hydrocarbon group, and a is a number between 0.5 and 4.0;
- (C) an organopolysiloxane having at least two silicon-bonded hydrogen atoms per molecule in an amount such that the quantity of the silicon-bonded hydrogen atoms in component (B) per 1 mole of silicon-bonded alkenyl groups in component (A) is 0.1 to 5 moles,
- (D) an amount of a hydrosilylation reaction catalyst such that the content of platinum metal contained in the catalyst is 0.01 to about 1,000 ppm based on the weight of component (A), and
- (E) 0.0001 to 1.0 parts by weight of a diamine compound with a general formula:
- R.sup.3.sub.2 N--R.sup.2 --NR.sup.3.sub.2
- wherein each R.sup.3 is independently selected from the group consisting of alkyl groups of 1 to about 4 carbon atoms and hydrogen atoms, R.sup.2 is an alkylene group of 2 to about 4 carbon atoms;
- and
- with the proviso that component (A) does not contain SiO.sub.4/2 units.
7 more elements
Dependencies are inferred from the claim text.