Poly(silethynylenedisiloxane) and method for the manufacture thereof
AssigneeDow Corning Japan, Ltd.
InventorToshio Suzuki
Life of this patent
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Abstract
Silethynylenedisiloxane polymers are described with repeating units represented by --R.sup.1 R.sup.2 SiC.tbd.CSiR.sup.3 R.sup.4 OSiR.sup.5 R.sup.6 O-- where R.sup.1 -R.sup.6 independently represent hydrogen atoms, alkyl groups, aryl groups, or alkenyl groups. The polymers are prepared by reacting a disilylacetylene compound represented by the formula X.sup.1 R.sup.1 R.sup.2 SiC.tbd.CSiR.sup.3 R.sup.4 X.sup.1 and a silane compound represented by the formula X.sup.2.sub.2 SiR.sup.5 R.sup.6 where X.sup.1 and X.sup.2 represent H, OH, OM, or a hydrolyzable group. X.sup.1 and X.sup.2 are not identical and are selected so that they undergo a condensation reaction to form a siloxane bond.
Claims7
Poly(silethynylenedisiloxane) with a degree of polymerization of 3 to 10,000 and with repeating units represented by the formula:
- --R.sup.1 R.sup.2 SiC.tbd.CSiR.sup.3 R.sup.4 OSiR.sup.5 R.sup.6 O-- where R.sup.1 -R.sup.6
- independently represent hydrogen atoms, alkyl groups, aryl groups, or alkenyl groups.
A method for the manufacture of poly(silethynylenedisiloxane), the method comprising:
- reacting a disilylacetylene compound represented by the formula,
- X.sup.1 R.sup.1 R.sup.2 SiC.tbd.CSiR.sup.3 R.sup.4 X.sup.1
- with a silane compound represented by the formula,
- X.sup.2.sub.2 SiR.sup.5 R.sup.6
- to form poly(silethynylenedisiloxane) with a degree of polymerization of 3 to 10,000 and with repeating units represented by the formula:
- --R.sup.1 R.sup.2 SiC.tbd.CSiR.sup.3 R.sup.4 OSiR.sup.5 R.sup.6 O--
- where R.sup.1 -R.sup.6 independently represent hydrogen atoms, alkyl groups, aryl groups, or alkenyl groups and X.sup.1 represents a hydroxy group or alkali metal oxide group of the formula --OM where M is an alkali-metal atom, and X.sup.2 represents a chlorine atom or amide group.
A method for the manufacture of poly(silethynylenedisiloxane), the method comprising:
- reacting a disilylacetylene compound represented by the formula,
- X.sup.1 R.sup.1 R.sup.2 SiC.tbd.CSiR.sup.3 R.sup.4 X.sup.1
- with a silane compound represented by the formula,
- X.sup.2.sub.2 SiR.sup.5 R.sup.6
- to form poly(silethynylenedisiloxane) with a degree of polymerization of 3 to 10,000 and with repeating units represented by the formula:
- --R.sup.1 R.sup.2 SiC.tbd.CSiR.sup.3 R.sup.4 OSiR.sup.5 R.sup.6 O--
- where R.sup.1 -R.sup.6 independently represent hydrogen atoms, alkyl groups, aryl groups, or alkenyl groups and X.sup.1 represents a halogen atom, amino group, amide group, alkoxy group, acyloxy group, or alkenyloxy group and X.sup.2 represents a hydroxy group or an alkali metal oxide group of the formula --OM where M is an alkali-metal atom.
Dependencies are inferred from the claim text.