as noted above , post cure caused by residual crosslinking hydrosilylation reactions occurring in silicone elastomers can be terminated by introducing ( i ) a strong platinum complexing ligand , ( ii ) an . tbd . sih quencher such as a vinylsiloxane or a vinylsilane , or ( iii ) a terminal alkyne . a strong platinum coordinating ligand has been found to be effective in deactivating the functioning of the catalyst used in the preparation of silicone elastomers . suitable ligands include phosphines , amines , and organic sulfides . representative ligands useful herein are trialkyl and triaryl phosphines such as triphenylphosphine pph 3 ; amines , diamines , and triamines such as n - butylamine ch 3 ( ch 2 ) 3nh 2 , triethanolamine ( hoch 2 ch 2 ) 3 n , and tetramethylethylenediamine ( ch 3 ) 2 nch 2 ch 2 n ( ch 3 ) 2 ; and organic sulfides such as ethyl phenyl sulfide c 6 h 5 sc 2 h 5 . i have determined that by adding one equivalent or more of a ligand at the shear & amp ; swell step in the process , any crosslinking reactions will be terminated , and therefore no post cure will occur . however , many strong ligands to platinum tend to be toxic , and so their presence even in small amounts may not be suitable in some applications , i . e ., as in for example personal care and health care products . this may limit the application of this particular feature of my invention to industrial applications . residual . tbd . sih according to my invention can also be quenched by molecules containing unsaturation such as alkene and alkyne ; oh , or any other functionality that will react with . tbd . sih . i have determined that because the internal crosslinking reaction is competing with the quenching reaction , the quenching reaction has to be carried out faster or in a more preferred mode than the crosslinking reaction . for example , using a large quantity of a quencher is one mode to increase the competition in favor of the quenching reaction , but this mode may not be economical nor desirable in some applications . i have found that vinylsiloxanes and / or vinylsilanes can be used to completely terminate post cure . vinylsiloxanes are preferred to react with . tbd . sih over other alkenylsiloxanes . in my process of making a silicone paste , a vinylsiloxane is introduced at the shear & amp ; swell step . when this is carried out according to my invention , on - going reactions of residual functionalities will be shifted to reactions between the incoming vinylsiloxane and the residual . tbd . sih , and the crosslinking reaction will be terminated . preferably , a monovinylsiloxane should be used because it is not capable of crosslinking . however , in the situation where moles of the quencher are in a large excess relative to . tbd . sih , multivinylsiloxanes such as divinylsiloxane and trivinylsiloxane are also suitable for purposes of my invention as well . representative of some organosilicon monomers and polymers which can be used as quenching agents according to my invention are silanes such as vinyl - t - butyldimethylsilane , vinyldiethylmethylsilane , vinylethyldimethylsilane , vinyltriethylsilane , vinyltrimethylsilane , divinyldimethylsilane , and divinyltetramethyldisilane ; and siloxanes such as vinylpentamethyldisiloxane , 1 , 3 - divinyltetramethyldisiloxane , a vinyltrisiloxane having the structure ( ch 3 ) 3 siosi ( ch ═ ch 2 ) ( ch 3 ) osi ( ch 3 ) 3 , 1 , 5 - divinylhexamethyltrisiloxane , and a divinylsiloxane oligomer having an average structure ( ch 2 ═ ch ) me 2 sio ( me 2 sio ) 8 sime 2 ( ch ═ ch 2 ). a schematic representation of a process according to my invention is shown below in which a vinylsiloxane is depicted as competing with hexenyl groups as follows : ## str1 ## in another embodiment of my invention , post cure quenching can be achieved using a post cure quenching agent other than a ligand or a silicon containing monomer or polymer . in this alternate embodiment , an organic compound can be used such as a terminal alkyne . i have determined that alkynes are more reactive than alkenes towards . tbd . si -- h in hydrosilylation reactions . thus , when an alkyne is introduced at the shear & amp ; swell step , reactions of . tbd . si -- h to the alkenyl group will shift to an incoming alkyne . in this fashion , the crosslinking reaction will terminate . some examples of organic alkynes which can be used according to my invention are acetylene , propyne , 1 - butyne , 1 - pentyne , 4 , 4 - dimethyl - 1 - pentyne , 1 - hexyne , 5 - methyl - 1 - hexyne , and 1 - decyne . it is also possible to use other unsaturated hydrocarbons such as alpha , omega - diynes of the formula ch . tbd . c ( ch 2 ) x c . tbd . ch ; or alpha , omega - ene - ynes of the formula ch 2 ═ ch ( ch 2 ) x c . tbd . ch where x is 1 - 20 . some representative examples of alpha , omega - diynes are 1 , 3 - butadiyne hc . tbd . c -- c . tbd . ch and 1 , 5 - hexadiyne ( dipropargyl ) hc . tbd . c -- ch 2 ch 2 -- c . tbd . ch . one example of a suitable alpha , omega - ene - yne is hexene - 5 - yne - 1 ch 2 ═ chch 2 ch 2 c . tbd . ch . regardless of the type of post cure quenching agent selected to be used for the purposes herein , an excess of post cure quenching agent is required . this not only increases the competition , but more importantly , it ensures consumption of all of the residual . tbd . si -- h groups . in particular , when a multifunctional vinyl siloxane or an alkyne is employed , the quantity of post cure quenching agent to be employed should be calculated on a molar basis rather than on an equivalent basis . the following examples are set forth in order to illustrate my invention in more detail . ( i ) an . tbd . sih siloxane of the formula me 3 sio ( me 2 sio ) 93 ( mehsio ) 6 sime 3 which is an average structure 51 g ( iv ) karstedt catalyst with a pt content of 0 . 51 % 0 . 058 g the above mixture was stirred in a capped container and heated at 55 ° c . before it gelled . the gel was heated in a 65 °- 70 ° c . oven for three hours . the gel was sheared and swollen with additional d5 to a silicone paste containing 10 . 2 % of the elastomer . vinyltrisiloxane ( ch 3 ) 3 siosi ( ch ═ ch 2 )( ch 3 ) osi ( ch 3 ) 3 in an amount of 200 mg was added and mixed with 91 g of the paste . the resulting product remained pasty for an indefinite length of time . karstedt &# 39 ; s catalyst is a preferred platinum catalyst , and is described in karstedt &# 39 ; s u . s . pat . nos . 3 , 715 , 334 and 3 , 814 , 730 , which are incorporated herein by reference . karstedt &# 39 ; s catalyst is a platinum divinyl tetramethyl disiloxane complex , typically containing about 0 . 5 - 1 . 0 weight percent of platinum , carried in a solvent such as toluene . the gel prepared in example 1 was sheared and swollen to a silicone paste containing 10 . 2 % of the elastomer in d5 , and the paste was kept in a jar . no vinyltrisiloxane was added . the resulting paste gelled to a semisolid after 12 hours . the same gel was made according to example 1 , and it was sheared and swollen to a silicone paste containing 10 . 2 % of the elastomer in d5 . a vinylsiloxane oligomer with the average structure ( ch 2 ═ ch ) me 2 sio ( me 2 sio ) 8 sime 2 ( ch ═ ch 2 ) 260 mg was mixed with 114 g of the paste . no further gelation was observed and the product remained pasty . the same gel was made according to example 1 , and it was sheared and swollen to a silicone paste containing 10 . 2 % of the elastomer in d5 . 1 - decyne ch 3 ( ch 2 ) 7 c . tbd . ch 120 mg was mixed with 100 g of the paste . no further gelation was observed and the product remained pasty . the same gel was made according to example 1 , and it was sheared and swollen to a silicone paste containing 10 . 2 % of the elastomer in d5 . a triphenylphosphine ( c 6 h 5 ) 3 p solution containing 0 . 5 weight percent triphenylphosphine in ethyl acetate 150 mg , was mixed with 100 g of the paste . no further gelation was observed and the product remained pasty . my invention is useful in any method involving silicone elastomers prepared by a crosslinking reaction between ( a ) . tbd . si -- h containing polysiloxanes and ( b ) an alpha , omega - diene , in the presence of a platinum catalyst and ( c ) a low molecular weight linear or cyclic polysiloxane . such elastomers can be swollen with the low molecular weight polysiloxane under a shear force . typically , the . tbd . si -- h containing polysiloxane ( a ) is a polymer represented by the formula r 3 sio ( r &# 39 ; 2 sio ) a ( r &# 34 ; hsio ) b sir 3 designated herein as type a 1 and polymers of the formula hr 2 sio ( r &# 39 ; 2 sio ) c sir 2 h or formula hr 2 sio ( r &# 39 ; 2 sio ) a ( r &# 34 ; hsio ) b sir 2 h designated herein as type a 2 . in these formulas , r , r &# 39 ;, and r &# 34 ;, are alkyl groups with 1 - 6 carbon atoms ; a is 0 - 250 ; b is 1 - 250 ; and c is 0 - 250 . the molar ratio of compounds a 2 : a 1 is 0 - 20 , preferably 0 - 5 . in most preferred embodiments , compounds of types a 1 and a 2 are used in the reaction , however , it is possible to successfully conduct the reaction using only compounds of type a 1 . the alpha , omega - diene ( b ) is typically a compound of the formula ch 2 ═ ch ( ch 2 ) x ch ═ ch 2 where x is 1 - 20 . representative alpha , omega - dienes are 1 , 4 - pentadiene ; 1 , 5 - hexadiene ; 1 , 6 - heptadiene ; 1 , 7 - octadiene ; 1 , 8 - nonadiene ; 1 , 9 - decadiene ; 1 , 11 - dodecadiene ; 1 , 13 - tetradecadiene ; and 1 , 19 - eicosadiene . these addition and crosslinking reactions require a catalyst to effect reaction between the . tbd .- sih containing polysiloxane and the alpha , omega - diene . suitable catalysts are group viii transition metals , i . e ., the noble metals . such noble metal catalysts are described in u . s . pat . no . 3 , 923 , 705 , incorporated herein by reference to show platinum catalysts . a preferred platinum catalyst is karstedt &# 39 ; s catalyst described above . another preferred platinum catalyst is a reaction product of chloroplatinic acid and an organosilicon compound containing terminal aliphatic unsaturation . it is described in u . s . pat . no . 3 , 419 , 593 , incorporated herein by reference . the noble metal catalysts are typically used in amounts from 0 . 00001 - 0 . 5 parts per 100 weight parts of the . tbd . sih containing polysiloxane , preferably 0 . 00001 - 0 . 02 parts , most preferably 0 . 00001 - 0 . 002 parts . the phrase low molecular weight silicone oil ( c ) is intended to include ( i ) low molecular weight linear and cyclic volatile methyl siloxanes , ( ii ) low molecular weight linear and cyclic volatile and non - volatile alkyl and aryl siloxanes , and ( iii ) low molecular weight linear and cyclic functional siloxanes . most preferred , however , are low molecular weight linear and cyclic volatile methyl siloxanes ( vms ). vms compounds correspond to the average unit formula ( ch 3 ) a sio . sub . ( 4 - a )/ 2 in which a has an average value of two to three . the compounds contain siloxane units joined by . tbd . si -- o -- si . tbd . bonds . representative units are monofunctional &# 34 ; m &# 34 ; units ( ch 3 ) 3 sio 1 / 2 and difunctional &# 34 ; d &# 34 ; units ( ch 3 ) 2 sio 2 / 2 . the presence of trifunctional &# 34 ; t &# 34 ; units ch 3 sio 3 / 2 results in the formation of branched linear or cyclic volatile methyl siloxanes . the presence of tetrafunctional &# 34 ; q &# 34 ; units sio 4 / 2 results in the formation of branched linear or cyclic volatile methyl siloxanes . linear vms have the formula ( ch 3 ) 3 sio {( ch 3 ) 2 sio } y si ( ch 3 ) 3 . the value of y is 0 - 5 . cyclic vms have the formula {( ch 3 ) 2 sio } z . the value of z is 3 - 6 . preferably , these volatile methyl siloxane have boiling points less than about 250 ° c . and viscosities of about 0 . 65 - 5 . 0 centistoke ( mm 2 / s ). representative linear volatile methyl siloxanes are hexamethyldisiloxane ( mm ) with a boiling point of 100 ° c ., viscosity of 0 . 65 mm 2 / s , and formula me 3 siosime 3 ; octamethyltrisiloxane ( mdm ) with a boiling point of 152 ° c ., viscosity of 1 . 04 mm 2 / s , and formula me 3 siome 2 siosime 3 ; decamethyltetrasiloxane ( md 2 m ) with a boiling point of 194 ° c ., viscosity of 1 . 53 mm 2 / s , and formula me 3 sio ( me 2 sio ) 2 sime 3 ; dodecamethylpentasiloxane ( md 3 m ) with a boiling point of 229 ° c ., viscosity of 2 . 06 mm 2 / s , and formula me 3 sio ( me 2 sio ) 3 sime 3 ; tetradecamethylhexasiloxane ( md 4 m ) with a boiling point of 245 ° c ., viscosity of 2 . 63 mm 2 / s , and formula me 3 sio ( me 2 sio ) 4 sime 3 ; and hexadecamethylheptasiloxane ( md 5 m ) with a boiling point of 270 ° c ., viscosity of 3 . 24 mm 2 / s , and formula me 3 sio ( me 2 sio ) 5 sime 3 . representative cyclic volatile methyl siloxanes are hexamethylcyclotrisiloxane ( d 3 ) a solid with a boiling point of 134 ° c . and formula {( me 2 ) sio } 3 ; octamethylcyclotetrasiloxane ( d 4 ) with a boiling point of 176 ° c ., viscosity of 2 . 3 mm 2 / s , and formula {( me 2 ) sio } 4 ; decamethylcyclopentasiloxane ( d 5 ) with a boiling point of 210 ° c ., viscosity of 3 . 87 mm 2 / s , and formula {( me 2 ) sio } 5 ; and dodecamethylcyclohexasiloxane ( d 6 ) with a boiling point of 245 ° c ., viscosity of 6 . 62 mm 2 / s , and formula {( me 2 ) sio } 6 . representative branched volatile methyl siloxanes and are heptamethyl - 3 -{( trimethylsilyl ) oxy } trisiloxane ( m 3 t ) with a boiling point of 192 ° c ., viscosity of 1 . 57 mm 2 / s , and formula c 10 h 30 o 3 si 4 ; hexamethyl - 3 , 3 , bis {( trimethylsilyl ) oxy } trisiloxane ( m 4 q ) with a boiling point of 222 ° c ., viscosity of 2 . 86 mm 2 / s , and formula c 12 h 36 o 4 si 5 ; and pentamethyl {( trimethylsilyl ) oxy } cyclotrisiloxane ( md3 ) with the formula c 8 h 24 o 4 si 4 . my process can include the use of low molecular weight linear and cyclic volatile and non - volatile alkyl and aryl siloxanes . representative linear polysiloxanes are compounds of the formula r 3 sio ( r 2 sio ) y sir 3 , and representative cyclic polysiloxanes are compounds of the formula ( r 2 sio ) z . r is an alkyl group of 1 - 6 carbon atoms , or an aryl group such as phenyl . the value of y is 0 - 80 , preferably 0 - 20 . the value of z is 0 - 9 , preferably 4 - 6 . these polysiloxanes have viscosities generally in the range of about 1 - 100 centistoke ( mm 2 / s ). other representative low molecular weight non - volatile polysiloxanes have the general structure : ## str2 ## where n has a value to provide polymers with a viscosity in the range of about 100 - 1 , 000 centistoke ( mm 2 / sec ). r2 and r3 are alkyl radicals of 1 - 20 carbon atoms , or an aryl group such as phenyl . typically , the value of n is about 80 - 375 . illustrative polysiloxanes are polydimethylsiloxane , polydiethylsiloxane , polymethylethylsiloxane , polymethylphenylsiloxane , and polydiphenylsiloxane . low molecular weight functional polysiloxanes can be represented by acrylamide functional siloxane fluids , acrylate functional siloxane fluids , amide functional siloxane fluids , amino functional siloxane fluids , carbinol functional siloxane fluids , carboxy functional siloxane fluids , chloroalkyl functional siloxane fluids , epoxy functional siloxane fluids , glycol functional siloxane fluids , ketal functional siloxane fluids , mercapto functional siloxane fluids , methyl ester functional siloxane fluids , perfluoro functional siloxane fluids , and silanol functional siloxanes . my invention is not limited to swelling silicone elastomers with only low molecular weight polysiloxanes . other types of solvents can swell the silicone elastomer . thus , a single solvent or a mixture of solvents may be used . by solvent i mean ( i ) organic compounds , ( ii ) compounds containing a silicon atom , ( iii ) mixtures of organic compounds , ( iv ) mixtures of compounds containing a silicon atom , or ( v ) mixtures of organic compounds and compounds containing a silicon atom ; used on an industrial scale to dissolve , suspend , or change the physical properties of other materials . in general , the organic compounds are aromatic hydrocarbons , aliphatic hydrocarbons , alcohols , aldehydes , ketones , amines , esters , ethers , glycols , glycol ethers , alkyl halides , or aromatic halides . representative of some common organic solvents are alcohols such as methanol , ethanol , 1 - propanol , cyclohexanol , benzyl alcohol , 2 - octanol , ethylene glycol , propylene glycol , and glycerol ; aliphatic hydrocarbons such as pentane , cyclohexane , heptane , varnish makers and painters ( vm & amp ; p ) naphtha , and mineral spirits ; alkyl halides such as chloroform , carbon tetrachloride , perchloroethylene , ethyl chloride , and chlorobenzene ; amines such as isopropylamine , cyclohexylamine , ethanolamine , and diethanolamine ; aromatic hydrocarbons such as benzene , toluene , ethylbenzene , and xylene ; esters such as ethyl acetate , isopropyl acetate , ethyl acetoacetate , amyl acetate , isobutyl isobutyrate , and benzyl acetate ; ethers such as ethyl ether , n - butyl ether , tetrahydrofuran , and 1 , 4 - dioxane ; glycol ethers such as ethylene glycol monomethyl ether , ethylene glycol monomethyl ether acetate , diethylene glycol monobutyl ether , and propylene glycol monophenyl ether ; ketones such as acetone , methyl ethyl ketone , cyclohexanone , diacetone alcohol , methyl amyl ketone , and diisobutyl ketone ; petroleum hydrocarbons such as mineral oil , gasoline , naphtha , kerosene , gas oil , heavy oil , and crude oil ; lubricating oils such as spindle oil and turbine oil ; and fatty oils such as corn oil , soybean oil , olive oil , rape seed oil , cotton seed oil , sardine oil , herring oil , and whale oil . &# 34 ; other &# 34 ; miscellaneous organic solvents can also be used , such as acetonitrile , nitromethane , dimethylformamide , propylene oxide , trioctyl phosphate , butyrolactone , furfural , pine oil , turpentine , and m - creosol . i further intend to encompass by the term solvent , volatile flavoring agents such as oil of wintergreen ; peppermint oil ; spearmint oil ; menthol ; vanilla ; cinnamon oil ; clove oil ; bay oil ; anise oil ; eucalyptus oil ; thyme oil ; cedar leaf oil ; oil of nutmeg ; oil of sage ; cassia oil ; cocoa ; licorice ; high fructose corn syrup ; citrus oils such as lemon , orange , lime , and grapefruit ; fruit essences such as apple , pear , peach , grape , strawberry , raspberry , cherry , plum , pineapple , and apricot ; and other useful flavoring agents including aldehydes and esters such as cinnamyl acetate , cinnamaldehyde , eugenyl formate , p - methylanisole , acetaldehyde , benzaldehyde , anisic aldehyde , citral , neral , decanal , vanillin , tolyl aldehyde , 2 , 6 - dimethyloctanal , and 2 - ethyl butyraldehyde . in addition , i intend the term solvent to include volatile fragrances such as natural products and perfume oils . some representative natural products and perfume oils are ambergris , benzoin , civet , clove , leaf oil , jasmine , mate &# 39 ;, mimosa , musk , myrrh , orris , sandalwood oil , and vetivert oil ; aroma chemicals such as amyl salicylate , amyl cinnamic aldehyde , benzyl acetate , citronellol , coumarin , geraniol , isobornyl acetate , ambrette , and terpinyl acetate ; and the various classic family perfume oils such as the floral bouquet family , the oriental family , the chypre family , the woody family , the citrus family , the canoe family , the leather family , the spice family , and the herbal family . carrying out of the basic process over which my invention is an improvement , i . e ., the basic process being the one generally represented by the &# 39 ; 362 patent , is a matter of combining the . tbd . sih containing polysiloxane ( s ), the alpha , omega - diene , the low molecular weight silicone oil or other solvent , and the catalyst ; and mixing these ingredients at room temperature until a gel is formed . additional amounts of the low molecular weight silicone oil or solvent are then added to the gel , and the resulting mixture is subjected to shear force to form the paste . any type of mixing and shearing equipment may be used to perform these steps such as a batch mixer , planetary mixer , single or multiple screw extruder , dynamic or static mixer , colloid mill , homogenizer , sonolator , or a combination thereof . typically , that basic process uses approximately a 1 : 1 molar ratio of . tbd . si -- h containing polysiloxane and alpha , omega - diene . useful materials may also be prepared by carrying out the basic process with an excess of either the . tbd . si -- h containing polysiloxane or the alpha , omega - diene , but this is a less efficient use of the materials . the remainder of the composition comprises the low molecular weight silicone oil or other solvent in amounts generally within the range of about 65 - 98 percent by weight of the composition , preferably about 80 - 98 percent by weight . as noted above , my improvement resides in the feature of adding to the basic process a post cure quenching agent , at or during the shear & amp ; swell step in the basic process . the silicone elastomer , silicone gel , and silicone paste compositions of my invention have particular value in the personal care arena . because of the unique volatility characteristics of the vms component of these compositions , they can be used alone , or blended with other cosmetic fluids , to form a variety of over - the - counter ( otc ) personal care products . thus , they are useful as carriers in antiperspirants and deodorants , since they leave a dry feel , and do not cool the skin upon evaporation . they are lubricious and will improve the properties of skin creams , skin care lotions , moisturizers , facial treatments such as acne or wrinkle removers , personal and facial cleansers , bath oils , perfumes , colognes , sachets , sunscreens , pre - shave and after - shave lotions , liquid soaps , shaving soaps , and shaving lathers . they can be used in hair shampoos , hair conditioners , hair sprays , mousses , permanents , depilatories , and cuticle coats , to enhance gloss and drying time , and provide conditioning benefits . in cosmetics , they will function as leveling and spreading agents for pigments in make - ups , color cosmetics , foundations , blushes , lipsticks , lip balms , eyeliners , mascaras , oil removers , color cosmetic removers , and powders . they are useful as delivery systems for oil and water soluble substances such as vitamins . when incorporated into sticks , gels , lotions , aerosols , and roll - ons , the compositions impart a dry , silky - smooth , payout . in addition , the compositions exhibit a variety of advantageous and beneficial properties such as clarity , shelf stability , and ease of preparation . hence , they have wide application , but especially in antiperspirants , deodorants , in perfumes as a carrier , and for conditioning hair . my silicone elastomers , gels , and pastes have uses beyond the personal care arena , including their use as a filler or insulation material for electrical cable , a soil or water barrier for in - ground stabilization , or as a replacement for epoxy materials used in coil - on - plug designs in the electronics industry . in these types of applications , a ligand may well be useable as a post cure quenching agent . they are also useful as carrier for crosslinked silicone rubber particles . in that application , ( i ) they allow ease of incorporation of the particles into such silicone or organic phases as sealants , paints , coatings , greases , adhesives , antifoams , and potting compounds ; and ( ii ) they provide for modifying theological , physical , or energy absorbing properties of such phases in either their neat or finished condition . again , in such applications , a ligand may be a viable alternative as post cure quenching agent . in addition , my silicone elastomers , gels , and pastes are capable of functioning as carriers for pharmaceuticals , biocides , herbicides , pesticides , and other biologically active substances ; and can be used to incorporate water and water - soluble substances into hydrophobic systems . examples of some water - soluble substances are salicylic acid , glycerol , enzymes , and glycolic acid . other variations may be made in monomers , polymers , copolymers , compounds , compositions , and methods described herein without departing from the essential features of my invention . the forms of my invention are exemplary only and not intended as limitations on their scope as defined in the appended claims .