METHOD FOR PREPARING FOAMABLE ORGANO-SILICONE COMPOSITIONS
The present invention relates to a method which comprises mixing together an organosiloxane rubber, an organo-silicone cross-linking agent and a platinum catalyst. This method also comprises adding an additional catalyst in the shape of an inorganic cobalt compound having a cobalt content of 34 wt %...
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| creator | SEMENKOVA, NATALIYA JURIEVNA KOZODAEVA, MARINA MIKHAILOVNA PEREVOZCHIKOV, SERGEI ALEXANDROVICH MAKARENKO, IGOR ANATOLIEVICH MINASYAN, RUBEN MKRTICHOVICH SHVETSOV, IVAN KONSTANTINOVICH POLIVANOV, ALEXANDR NIKOLAEVICH BELYAEV, SPARTAK TIMOFEEVICH GULKO, PETER KOZODAEVA, NATALIYA MIKHAILOVNA |
| description | The present invention relates to a method which comprises mixing together an organosiloxane rubber, an organo-silicone cross-linking agent and a platinum catalyst. This method also comprises adding an additional catalyst in the shape of an inorganic cobalt compound having a cobalt content of 34 wt %. The organosiloxane rubber consists in alpha , omega -dihydroxypolydiorganosiloxanes of the general formula HO[R R SiO]nH which have a viscosity of 15 DIVIDED 300 P at 20 DEG C and a molecular weight of between 20000 and 65000. The letter n is an integer ranging from 270 to 870, while R and R represent aliphatic radicals comprising from 1 to 6 carbon atoms, phenyl, a chloromethyl group or a 3,3,3-trifluoropropyl group. The organo-silicone cross-linking agent consists in polyorganosiloxane hydrides of the general formula R 3SiO[R (H)SiO]m[R 2SiO]lSiR 3 which have a SiH-group content of between 0.35 and 1.80 wt.% and a molecular weight of between 50 and 200. R and R represent an alkyl radical comprising from 1 to 6 carbon atoms and m is an integer ranging from 1 to 20 while l is an integer ranging from 0 to 19, with the proviso that m + l = 20. The components are mixed together according to the following proportions: 100 parts by weight of organosiloxane rubber; from 8 to 15 parts by weight of organo-silicone cross-linking agent; (9,04 DIVIDED 8,94) 10 parts by weight of platinum catalyst; and 12 DIVIDED 22 parts by weight of additional catalyst.
Cette invention concerne un procédé qui consiste à mélanger un caoutchouc à base de siloxane organique, un agent de réticulation à base de silicone organique ainsi qu'un catalyseur à base de platine. Ce procédé consiste également à ajouter un catalyseur complémentaire qui consiste en un composé de cobalt inorganique ayant une teneur en cobalt de 34 % en poids. On utilise en qualité de caoutchouc à base de siloxane organique des alpha , omega -dihydroxypolydiorganosiloxanes qui correspondent à la formule générale HO[R R SiO]nH, et qui possèdent une viscosité de 15 DIVIDED 300 P à 20 DEG C ainsi qu'un poids moléculaire de 20000 à 65000. La lettre n représente un nombre entier de 270 à 870, tandis que R et R représentent des radicaux aliphatiques comportant de 1 à 6 atomes de carbone, phényle, un groupe chlorométhyle ou un groupe 3,3,3-trifluoropropyle. On utilise en qualité d'agent de réticulation à base de silicone organique des hydrures de polyorganosiloxanes qui correspondent à la formule générale R 3SiO[R (H)SiO]m[ |
| format | Patent |
| fullrecord | <record><control><sourceid>epo_EVB</sourceid><recordid>TN_cdi_epo_espacenet_WO9936463A1</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>WO9936463A1</sourcerecordid><originalsourceid>FETCH-epo_espacenet_WO9936463A13</originalsourceid><addsrcrecordid>eNrjZLDydQ3x8HdRcPMPUggIcg1wDPL0cwfyHH0dnXxcFfyD3B39_HWDPX08nf39XBWc_X0D_IM9Qzz9_YJ5GFjTEnOKU3mhNDeDgptriLOHbmpBfnxqcUFicmpeakl8uL-lpbGZiZmxo6ExEUoAffkpEg</addsrcrecordid><sourcetype>Open Access Repository</sourcetype><iscdi>true</iscdi><recordtype>patent</recordtype></control><display><type>patent</type><title>METHOD FOR PREPARING FOAMABLE ORGANO-SILICONE COMPOSITIONS</title><source>esp@cenet</source><creator>SEMENKOVA, NATALIYA JURIEVNA ; KOZODAEVA, MARINA MIKHAILOVNA ; PEREVOZCHIKOV, SERGEI ALEXANDROVICH ; MAKARENKO, IGOR ANATOLIEVICH ; MINASYAN, RUBEN MKRTICHOVICH ; SHVETSOV, IVAN KONSTANTINOVICH ; POLIVANOV, ALEXANDR NIKOLAEVICH ; BELYAEV, SPARTAK TIMOFEEVICH ; GULKO, PETER ; KOZODAEVA, NATALIYA MIKHAILOVNA</creator><creatorcontrib>SEMENKOVA, NATALIYA JURIEVNA ; KOZODAEVA, MARINA MIKHAILOVNA ; PEREVOZCHIKOV, SERGEI ALEXANDROVICH ; MAKARENKO, IGOR ANATOLIEVICH ; MINASYAN, RUBEN MKRTICHOVICH ; SHVETSOV, IVAN KONSTANTINOVICH ; POLIVANOV, ALEXANDR NIKOLAEVICH ; BELYAEV, SPARTAK TIMOFEEVICH ; GULKO, PETER ; KOZODAEVA, NATALIYA MIKHAILOVNA</creatorcontrib><description>The present invention relates to a method which comprises mixing together an organosiloxane rubber, an organo-silicone cross-linking agent and a platinum catalyst. This method also comprises adding an additional catalyst in the shape of an inorganic cobalt compound having a cobalt content of 34 wt %. The organosiloxane rubber consists in alpha , omega -dihydroxypolydiorganosiloxanes of the general formula HO[R R SiO]nH which have a viscosity of 15 DIVIDED 300 P at 20 DEG C and a molecular weight of between 20000 and 65000. The letter n is an integer ranging from 270 to 870, while R and R represent aliphatic radicals comprising from 1 to 6 carbon atoms, phenyl, a chloromethyl group or a 3,3,3-trifluoropropyl group. The organo-silicone cross-linking agent consists in polyorganosiloxane hydrides of the general formula R 3SiO[R (H)SiO]m[R 2SiO]lSiR 3 which have a SiH-group content of between 0.35 and 1.80 wt.% and a molecular weight of between 50 and 200. R and R represent an alkyl radical comprising from 1 to 6 carbon atoms and m is an integer ranging from 1 to 20 while l is an integer ranging from 0 to 19, with the proviso that m + l = 20. The components are mixed together according to the following proportions: 100 parts by weight of organosiloxane rubber; from 8 to 15 parts by weight of organo-silicone cross-linking agent; (9,04 DIVIDED 8,94) 10<-4> parts by weight of platinum catalyst; and 12 DIVIDED 22 parts by weight of additional catalyst.
Cette invention concerne un procédé qui consiste à mélanger un caoutchouc à base de siloxane organique, un agent de réticulation à base de silicone organique ainsi qu'un catalyseur à base de platine. Ce procédé consiste également à ajouter un catalyseur complémentaire qui consiste en un composé de cobalt inorganique ayant une teneur en cobalt de 34 % en poids. On utilise en qualité de caoutchouc à base de siloxane organique des alpha , omega -dihydroxypolydiorganosiloxanes qui correspondent à la formule générale HO[R R SiO]nH, et qui possèdent une viscosité de 15 DIVIDED 300 P à 20 DEG C ainsi qu'un poids moléculaire de 20000 à 65000. La lettre n représente un nombre entier de 270 à 870, tandis que R et R représentent des radicaux aliphatiques comportant de 1 à 6 atomes de carbone, phényle, un groupe chlorométhyle ou un groupe 3,3,3-trifluoropropyle. On utilise en qualité d'agent de réticulation à base de silicone organique des hydrures de polyorganosiloxanes qui correspondent à la formule générale R 3SiO[R (H)SiO]m[R 2SiO]lSiR 3, et qui possèdent un contenu en groupes SiH de 0,35 à 1,80 % en poids ainsi qu'un poids moléculaire de 50 à 200. R et R représentent un radical alkyle comportant de 1 à 6 atomes de carbone, tandis que m représente un nombre entier de 1 à 20 et que l représente un nombre entier de 0 à 19, étant entendu que m + l = 20. Les composants sont mélangés selon les proportions suivantes: 100 parts en poids de caoutchouc à base de siloxane organique; de 8 à 15 parts en poids d'agent de réticulation à base de silicone organique; (9,04 DIVIDED 8,94) 10<-4> parts en poids de catalyseur à base de platine; et 12 DIVIDED 22 parts en poids de catalyseur complémentaire.</description><edition>6</edition><language>eng ; fre ; rus</language><subject>AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G ; CHEMISTRY ; COMPOSITIONS BASED THEREON ; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS ; GENERAL PROCESSES OF COMPOUNDING ; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS ; METALLURGY ; ORGANIC MACROMOLECULAR COMPOUNDS ; THEIR PREPARATION OR CHEMICAL WORKING-UP ; WORKING-UP</subject><creationdate>1999</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19990722&DB=EPODOC&CC=WO&NR=9936463A1$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25564,76547</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19990722&DB=EPODOC&CC=WO&NR=9936463A1$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>SEMENKOVA, NATALIYA JURIEVNA</creatorcontrib><creatorcontrib>KOZODAEVA, MARINA MIKHAILOVNA</creatorcontrib><creatorcontrib>PEREVOZCHIKOV, SERGEI ALEXANDROVICH</creatorcontrib><creatorcontrib>MAKARENKO, IGOR ANATOLIEVICH</creatorcontrib><creatorcontrib>MINASYAN, RUBEN MKRTICHOVICH</creatorcontrib><creatorcontrib>SHVETSOV, IVAN KONSTANTINOVICH</creatorcontrib><creatorcontrib>POLIVANOV, ALEXANDR NIKOLAEVICH</creatorcontrib><creatorcontrib>BELYAEV, SPARTAK TIMOFEEVICH</creatorcontrib><creatorcontrib>GULKO, PETER</creatorcontrib><creatorcontrib>KOZODAEVA, NATALIYA MIKHAILOVNA</creatorcontrib><title>METHOD FOR PREPARING FOAMABLE ORGANO-SILICONE COMPOSITIONS</title><description>The present invention relates to a method which comprises mixing together an organosiloxane rubber, an organo-silicone cross-linking agent and a platinum catalyst. This method also comprises adding an additional catalyst in the shape of an inorganic cobalt compound having a cobalt content of 34 wt %. The organosiloxane rubber consists in alpha , omega -dihydroxypolydiorganosiloxanes of the general formula HO[R R SiO]nH which have a viscosity of 15 DIVIDED 300 P at 20 DEG C and a molecular weight of between 20000 and 65000. The letter n is an integer ranging from 270 to 870, while R and R represent aliphatic radicals comprising from 1 to 6 carbon atoms, phenyl, a chloromethyl group or a 3,3,3-trifluoropropyl group. The organo-silicone cross-linking agent consists in polyorganosiloxane hydrides of the general formula R 3SiO[R (H)SiO]m[R 2SiO]lSiR 3 which have a SiH-group content of between 0.35 and 1.80 wt.% and a molecular weight of between 50 and 200. R and R represent an alkyl radical comprising from 1 to 6 carbon atoms and m is an integer ranging from 1 to 20 while l is an integer ranging from 0 to 19, with the proviso that m + l = 20. The components are mixed together according to the following proportions: 100 parts by weight of organosiloxane rubber; from 8 to 15 parts by weight of organo-silicone cross-linking agent; (9,04 DIVIDED 8,94) 10<-4> parts by weight of platinum catalyst; and 12 DIVIDED 22 parts by weight of additional catalyst.
Cette invention concerne un procédé qui consiste à mélanger un caoutchouc à base de siloxane organique, un agent de réticulation à base de silicone organique ainsi qu'un catalyseur à base de platine. Ce procédé consiste également à ajouter un catalyseur complémentaire qui consiste en un composé de cobalt inorganique ayant une teneur en cobalt de 34 % en poids. On utilise en qualité de caoutchouc à base de siloxane organique des alpha , omega -dihydroxypolydiorganosiloxanes qui correspondent à la formule générale HO[R R SiO]nH, et qui possèdent une viscosité de 15 DIVIDED 300 P à 20 DEG C ainsi qu'un poids moléculaire de 20000 à 65000. La lettre n représente un nombre entier de 270 à 870, tandis que R et R représentent des radicaux aliphatiques comportant de 1 à 6 atomes de carbone, phényle, un groupe chlorométhyle ou un groupe 3,3,3-trifluoropropyle. On utilise en qualité d'agent de réticulation à base de silicone organique des hydrures de polyorganosiloxanes qui correspondent à la formule générale R 3SiO[R (H)SiO]m[R 2SiO]lSiR 3, et qui possèdent un contenu en groupes SiH de 0,35 à 1,80 % en poids ainsi qu'un poids moléculaire de 50 à 200. R et R représentent un radical alkyle comportant de 1 à 6 atomes de carbone, tandis que m représente un nombre entier de 1 à 20 et que l représente un nombre entier de 0 à 19, étant entendu que m + l = 20. Les composants sont mélangés selon les proportions suivantes: 100 parts en poids de caoutchouc à base de siloxane organique; de 8 à 15 parts en poids d'agent de réticulation à base de silicone organique; (9,04 DIVIDED 8,94) 10<-4> parts en poids de catalyseur à base de platine; et 12 DIVIDED 22 parts en poids de catalyseur complémentaire.</description><subject>AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G</subject><subject>CHEMISTRY</subject><subject>COMPOSITIONS BASED THEREON</subject><subject>COMPOSITIONS OF MACROMOLECULAR COMPOUNDS</subject><subject>GENERAL PROCESSES OF COMPOUNDING</subject><subject>MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS</subject><subject>METALLURGY</subject><subject>ORGANIC MACROMOLECULAR COMPOUNDS</subject><subject>THEIR PREPARATION OR CHEMICAL WORKING-UP</subject><subject>WORKING-UP</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>1999</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZLDydQ3x8HdRcPMPUggIcg1wDPL0cwfyHH0dnXxcFfyD3B39_HWDPX08nf39XBWc_X0D_IM9Qzz9_YJ5GFjTEnOKU3mhNDeDgptriLOHbmpBfnxqcUFicmpeakl8uL-lpbGZiZmxo6ExEUoAffkpEg</recordid><startdate>19990722</startdate><enddate>19990722</enddate><creator>SEMENKOVA, NATALIYA JURIEVNA</creator><creator>KOZODAEVA, MARINA MIKHAILOVNA</creator><creator>PEREVOZCHIKOV, SERGEI ALEXANDROVICH</creator><creator>MAKARENKO, IGOR ANATOLIEVICH</creator><creator>MINASYAN, RUBEN MKRTICHOVICH</creator><creator>SHVETSOV, IVAN KONSTANTINOVICH</creator><creator>POLIVANOV, ALEXANDR NIKOLAEVICH</creator><creator>BELYAEV, SPARTAK TIMOFEEVICH</creator><creator>GULKO, PETER</creator><creator>KOZODAEVA, NATALIYA MIKHAILOVNA</creator><scope>EVB</scope></search><sort><creationdate>19990722</creationdate><title>METHOD FOR PREPARING FOAMABLE ORGANO-SILICONE COMPOSITIONS</title><author>SEMENKOVA, NATALIYA JURIEVNA ; KOZODAEVA, MARINA MIKHAILOVNA ; PEREVOZCHIKOV, SERGEI ALEXANDROVICH ; MAKARENKO, IGOR ANATOLIEVICH ; MINASYAN, RUBEN MKRTICHOVICH ; SHVETSOV, IVAN KONSTANTINOVICH ; POLIVANOV, ALEXANDR NIKOLAEVICH ; BELYAEV, SPARTAK TIMOFEEVICH ; GULKO, PETER ; KOZODAEVA, NATALIYA MIKHAILOVNA</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_WO9936463A13</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng ; fre ; rus</language><creationdate>1999</creationdate><topic>AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G</topic><topic>CHEMISTRY</topic><topic>COMPOSITIONS BASED THEREON</topic><topic>COMPOSITIONS OF MACROMOLECULAR COMPOUNDS</topic><topic>GENERAL PROCESSES OF COMPOUNDING</topic><topic>MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS</topic><topic>METALLURGY</topic><topic>ORGANIC MACROMOLECULAR COMPOUNDS</topic><topic>THEIR PREPARATION OR CHEMICAL WORKING-UP</topic><topic>WORKING-UP</topic><toplevel>online_resources</toplevel><creatorcontrib>SEMENKOVA, NATALIYA JURIEVNA</creatorcontrib><creatorcontrib>KOZODAEVA, MARINA MIKHAILOVNA</creatorcontrib><creatorcontrib>PEREVOZCHIKOV, SERGEI ALEXANDROVICH</creatorcontrib><creatorcontrib>MAKARENKO, IGOR ANATOLIEVICH</creatorcontrib><creatorcontrib>MINASYAN, RUBEN MKRTICHOVICH</creatorcontrib><creatorcontrib>SHVETSOV, IVAN KONSTANTINOVICH</creatorcontrib><creatorcontrib>POLIVANOV, ALEXANDR NIKOLAEVICH</creatorcontrib><creatorcontrib>BELYAEV, SPARTAK TIMOFEEVICH</creatorcontrib><creatorcontrib>GULKO, PETER</creatorcontrib><creatorcontrib>KOZODAEVA, NATALIYA MIKHAILOVNA</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>SEMENKOVA, NATALIYA JURIEVNA</au><au>KOZODAEVA, MARINA MIKHAILOVNA</au><au>PEREVOZCHIKOV, SERGEI ALEXANDROVICH</au><au>MAKARENKO, IGOR ANATOLIEVICH</au><au>MINASYAN, RUBEN MKRTICHOVICH</au><au>SHVETSOV, IVAN KONSTANTINOVICH</au><au>POLIVANOV, ALEXANDR NIKOLAEVICH</au><au>BELYAEV, SPARTAK TIMOFEEVICH</au><au>GULKO, PETER</au><au>KOZODAEVA, NATALIYA MIKHAILOVNA</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>METHOD FOR PREPARING FOAMABLE ORGANO-SILICONE COMPOSITIONS</title><date>1999-07-22</date><risdate>1999</risdate><abstract>The present invention relates to a method which comprises mixing together an organosiloxane rubber, an organo-silicone cross-linking agent and a platinum catalyst. This method also comprises adding an additional catalyst in the shape of an inorganic cobalt compound having a cobalt content of 34 wt %. The organosiloxane rubber consists in alpha , omega -dihydroxypolydiorganosiloxanes of the general formula HO[R R SiO]nH which have a viscosity of 15 DIVIDED 300 P at 20 DEG C and a molecular weight of between 20000 and 65000. The letter n is an integer ranging from 270 to 870, while R and R represent aliphatic radicals comprising from 1 to 6 carbon atoms, phenyl, a chloromethyl group or a 3,3,3-trifluoropropyl group. The organo-silicone cross-linking agent consists in polyorganosiloxane hydrides of the general formula R 3SiO[R (H)SiO]m[R 2SiO]lSiR 3 which have a SiH-group content of between 0.35 and 1.80 wt.% and a molecular weight of between 50 and 200. R and R represent an alkyl radical comprising from 1 to 6 carbon atoms and m is an integer ranging from 1 to 20 while l is an integer ranging from 0 to 19, with the proviso that m + l = 20. The components are mixed together according to the following proportions: 100 parts by weight of organosiloxane rubber; from 8 to 15 parts by weight of organo-silicone cross-linking agent; (9,04 DIVIDED 8,94) 10<-4> parts by weight of platinum catalyst; and 12 DIVIDED 22 parts by weight of additional catalyst.
Cette invention concerne un procédé qui consiste à mélanger un caoutchouc à base de siloxane organique, un agent de réticulation à base de silicone organique ainsi qu'un catalyseur à base de platine. Ce procédé consiste également à ajouter un catalyseur complémentaire qui consiste en un composé de cobalt inorganique ayant une teneur en cobalt de 34 % en poids. On utilise en qualité de caoutchouc à base de siloxane organique des alpha , omega -dihydroxypolydiorganosiloxanes qui correspondent à la formule générale HO[R R SiO]nH, et qui possèdent une viscosité de 15 DIVIDED 300 P à 20 DEG C ainsi qu'un poids moléculaire de 20000 à 65000. La lettre n représente un nombre entier de 270 à 870, tandis que R et R représentent des radicaux aliphatiques comportant de 1 à 6 atomes de carbone, phényle, un groupe chlorométhyle ou un groupe 3,3,3-trifluoropropyle. On utilise en qualité d'agent de réticulation à base de silicone organique des hydrures de polyorganosiloxanes qui correspondent à la formule générale R 3SiO[R (H)SiO]m[R 2SiO]lSiR 3, et qui possèdent un contenu en groupes SiH de 0,35 à 1,80 % en poids ainsi qu'un poids moléculaire de 50 à 200. R et R représentent un radical alkyle comportant de 1 à 6 atomes de carbone, tandis que m représente un nombre entier de 1 à 20 et que l représente un nombre entier de 0 à 19, étant entendu que m + l = 20. Les composants sont mélangés selon les proportions suivantes: 100 parts en poids de caoutchouc à base de siloxane organique; de 8 à 15 parts en poids d'agent de réticulation à base de silicone organique; (9,04 DIVIDED 8,94) 10<-4> parts en poids de catalyseur à base de platine; et 12 DIVIDED 22 parts en poids de catalyseur complémentaire.</abstract><edition>6</edition><oa>free_for_read</oa></addata></record> |
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| subjects | AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS GENERAL PROCESSES OF COMPOUNDING MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP WORKING-UP |
| title | METHOD FOR PREPARING FOAMABLE ORGANO-SILICONE COMPOSITIONS |
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