摘要:
A curable mixture for preparing soft silicone elastomers having low exudation properties comprises:(a) 100 parts by weight of a vinyl-containing base polymer of the formula ##STR1## in which R and R' are alkyl having 1 to 8 carbon atoms, aryl having 3 to 8 carbon atoms, vinyl having 3 to 8 carbon atoms, and fluoroalkyl having 3 to 8 carbon atoms, with the proviso that said base polymer contains a statistical average of 0.5 to 1.8 vinyl groups per molecule, andx is a sufficiently large number that the viscosity of the polymer is between 0.1 and 300,000 Pascal-seconds at 20.degree. C.,(b) 0.1 to 50 parts by weight of an organohydrogensiloxane of the formula ##STR2## wherein R" is an alkyl having 1 to 8 carbon atoms, aryl having 3 to 8 carbon atoms or fluoralkyl having 3 to 8 carbon atoms,m is at least 3, and the sum of n and m is a sufficiently large number that said siloxane has a viscosity of 0.005 to 0.1 Pascal-seconds at 25.degree. C.,(c) 1 to 250 ppm of a platinum catalyst, and(d) 0 to 200 parts by weight of filler.
摘要:
A process for manufacturing foamed silicone compositions by foaming a cross-linkable composition which comprises:(a) 100 parts by weight of a vinyl-containing polysiloxane containing 0.0002 to 3% by weight of vinyl groups and a viscosity of from 0.1 to 1,000 Pascal-seconds at 25.degree. C.,(b) up to 10 parts by weight of a silanol-containing silicon compound with a viscosity from 0.01 to 10 Pascal-seconds at 25.degree. C.,(c) up to 200 parts by weight of filler,(d) 1 to 50 parts by weight of a polysiloxane with a viscosity of 0.005 to 0.1 Pascal-seconds at 25.degree. C., and(e) a platinum catalyst, is characterized by foaming the cross-linkable composition with a substance containing hydroxyl groups at temperatures of 50.degree. to 150.degree. C.
摘要:
The present invention relates to a process for the manufacturing of continuously shaped cured silicone articles, particularly extrusions articles and the use of silicone compositions containing a photoactivatable metal catalyst in said process, wherein the curing is initiated by visible or UV-light.
摘要:
Peroxide curable fluororubbers, which contain no cure-site units in addition to the fluoromonomers forming the polymer chain, and a process for their production.
摘要:
The present invention relates to a transparent material based on addition-crosslinking polysiloxanes, which is used as occlusal print for molding side teeth composites.
摘要:
A system and method for ordering goods in a distributed message based business management system uses an internal request business object that identifies parties involved, items, status of items, and identification and administrative information of an internal request. The internal business object includes actions comprising the ability to submit action for the creation of follow-on documents, trigger a check for correctness and completeness of the internal request, and start an approval action that initiates an approval process of the internal request.
摘要:
The invention relates to a novel curable mixture comprising a silicone rubber a), at least one aryl phosphoric acid ester b) and optionally at least one further additive c), the improvement wherein the aryl phosphoric acid ester b) is silicone incompatible, whereby upon curing of the mixture the cured product is self-lubricating.
摘要:
The invention relates to novel polyorganosiloxanes, methods for their preparation and their use, in particular as force and/or heat transmitting liquids, such as hydraulic liquids, and in cosmetic compositions.
摘要:
The present invention relates to a process for the manufacturing of continuously shaped cured silicone articles, particularly extrusions articles and the use of silicone compositions containing a photoactivatable metal catalyst in said process, wherein the curing is initiated by visible or UV-light.