Abstract: A continuous process provides a devolatilized liquid injection moldable silicone composition. In the process, a filler, treating agent and silicone polymer are introduced into an extruder having a length to diameter ratio of at least greater than 50. The filler, treating agent and silicone elastomer are continuously compounded in the extruder into a devolatilized liquid injection moldable silicone composition. A system for preparing a liquid silicone rubber composition comprises a mixer to prepare a concentrate of filler and silicone polymer, a long extruder having an L/D ratio of greater than 50, connected to the mixer to receive the concentrate from the mixer and to compound and devolatilize the concentrate, a treating agent and silicone polymer into a liquid silicone rubber composition containing volatiles and a cooler to receive the liquid silicone rubber composition to cool, homogenize and further devolatilized the composition.

Abstract: A continuous process provides a devolatilized liquid injection moldable silicone composition. In the process, a filler, treating agent and silicone polymer are introduced into an extruder having a length to diameter ratio of at least greater than 50. The filler, treating agent and silicone elastomer are continuously compounded in the extruder into a devolatilized liquid injection moldable silicone composition. A system for preparing a liquid silicone rubber composition comprises a mixer to prepare a concentrate of filler and silicone polymer, a long extruder having an L/D ratio of greater than 50, connected to the mixer to receive the concentrate from the mixer and to compound and devolatilize the concentrate, a treating agent and silicone polymer into a liquid silicone rubber composition containing volatiles and a cooler to receive the liquid silicone rubber composition to cool, homogenize and further devolatilized the composition.

Abstract: A continuous process provides a devolatilized liquid injection moldable silicone composition. In the process, a filler, treating agent and silicone polymer are introduced into an extruder having a length to diameter ratio of at least greater than 50. The filler, treating agent and silicone elastomer are continuously compounded in the extruder into a devolatilized liquid injection moldable silicone composition. A system for preparing a liquid silicone rubber composition comprises a mixer to prepare a concentrate of filler and silicone polymer, a long extruder having an L/D ratio of greater than 50, connected to the mixer to receive the concentrate from the mixer and to compound and devolatilize the concentrate, a treating agent and silicone polymer into a liquid silicone rubber composition containing volatiles and a cooler to receive the liquid silicone rubber composition to cool, homogenize and further devolatilized the composition.

Abstract: A continuous process provides a devolatilized liquid injection moldable silicone composition. In the process, a filler, treating agent and silicone polymer are introduced into an extruder having a length to diameter ratio of at least greater than 50. The filler, treating agent and silicone elastomer are continuously compounded in the extruder into a devolatilized liquid injection moldable silicone composition. A system for preparing a liquid silicone rubber composition comprises a mixer to prepare a concentrate of filler and silicone polymer, a long extruder having an L/D ratio of greater than 50, connected to the mixer to receive the concentrate from the mixer and to compound and devolatilize the concentrate, a treating agent and silicone polymer into a liquid silicone rubber composition containing volatiles and a cooler to receive the liquid silicone rubber composition to cool, homogenize and further devolatilized the composition.

Abstract: A continuous process provides a devolatilized liquid injection moldable silicone composition. In the process, a filler, treating agent and silicone polymer are introduced into an extruder having a length to diameter ratio of at least greater than 50. The filler, treating agent and silicone elastomer are continuously compounded in the extruder into a devolatilized liquid injection moldable silicone composition. A system for preparing a liquid silicone rubber composition comprises a mixer to prepare a concentrate of filler and silicone polymer, a long extruder having an L/D ratio of greater than 50, connected to the mixer to receive the concentrate from the mixer and to compound and devolatilize the concentrate, a treating agent and silicone polymer into a liquid silicone rubber composition containing volatiles and a cooler to receive the liquid silicone rubber composition to cool, homogenize and further devolatilized the composition.

Abstract: A continuous process provides a devolatilized liquid injection moldable silicone composition. In the process, a filler, treating agent and silicone polymer are introduced into an extruder having a length to diameter ratio of at least greater than 50. The filler, treating agent and silicone elastomer are continuously compounded in the extruder into a devolatilized liquid injection moldable silicone composition. A system for preparing a liquid silicone rubber composition comprises a mixer to prepare a concentrate of filler and silicone polymer, a long extruder having an L/D ratio of greater than 50, connected to the mixer to receive the concentrate from the mixer and to compound and devolatilize the concentrate, a treating agent and silicone polymer into a liquid silicone rubber composition containing volatiles and a cooler to receive the liquid silicone rubber composition to cool, homogenize and further devolatilized the composition.

Abstract: The compression set of elastomeric silicone compositions, addition cured injection moldable compositions, is reduced by the incorporation of nitrogen compounds wherein the nitrogen possesses at least one organic substituent and the nitrogen is tetravalent wherein the nitrogen is cationic. The adhesion of such compositions to thermoset or thermoplastic polymer substrates is improved by the addition of bis(trimethoxysilylpropyl)fumarate and a disilanol that may or may not contain alkenyl groups. The lubricity of such compositions is improved by the addition of compounds selected from the group consisting of diorganosiloxanes such as polydimethylsiloxanes, phenyl containing siloxanes such as copolymers of diphenylsiloxane with diorganosiloxanes and copolymers of methylphenylsiloxane with diorganosiloxanes, fluorosilicones such as silicones containing trifluoropropyl substituted siloxanes, polydimethylsiloxanes, aliphatic and aromatic hydrocarbons that are liquid between 0.degree. C. and 100.degree. C.

Abstract: Acetylenic maleates, fumarates and related derivative compounds are new compositions of matter having the formula:R.sub.1 O.sub.2 C--CH.dbd.CH--CO.sub.2 R.sub.2wherein R.sub.1 may be an organic moiety containing at least two carbon atoms triply bonded one to the other as:--C.tbd.C--and R.sub.2 may be hydrogen, an organic moiety, or R.sub.1 ; suitable for use as liquid injection molding inhibitors either singly or in combination with themselves or other liquid injection molding inhibitors when used for the process of liquid injection molding curable compositions enabling an increase in the size of articles manufactured therefrom, which new compositions of matter cure into the polymerizable or curable resins thereby creating new compositions of matter as cured resins from which said articles of manufacture are produced.

Abstract: Acetylenic maleates, fumarates and related derivative compounds are new compositions of matter having the formula:R.sub.1 O.sub.2 C--CH.dbd.CH--CO.sub.2 R.sub.2wherein R.sub.1 may be an organic moiety containing at least two carbon atoms triply bonded one to the other as:--C.tbd.C--and R.sub.2 may be hydrogen, an organic moiety, or R.sub.1 ; suitable for use as liquid injection molding inhibitors either singly or in combination with themselves or other liquid injection molding inhibitors when used for the process of liquid injection molding curable compositions enabling an increase in the size of articles manufactured therefrom, which new compositions of matter cure into the polymerizable or curable resins thereby creating new compositions of matter as cured resins from which said articles of manufacture are produced.

Abstract: Acetylenic maleates, fumarates and related derivative compounds are new compositions of matter having the formula:R.sub.1 O.sub.2 C--CH.dbd.CH--CO.sub.2 R.sub.2wherein R.sub.1 may be an organic moiety containing at least two carbon atoms triply bonded one to the other as:--C.tbd.C--and R.sub.2 may be hydrogen, an organic moiety, or R.sub.1 ; suitable for use as liquid injection molding inhibitors either singly or in combination with themselves or other liquid injection molding inhibitors when used for the process of liquid injection molding curable compositions enabling an increase in the size of articles manufactured therefrom, which new compositions of matter cure into the polymerizable or curable resins thereby creating new compositions of matter as cured resins from which said articles of manufacture are produced.

Abstract: The compression set of elastomeric silicone compositions, addition cured injection moldable compositions or millable compositions, is reduced by the incorporation of nitrogen compounds wherein the nitrogen possesses at least one organic substituent and the nitrogen is tetravalent wherein the nitrogen is cationic.

Abstract: The compression set of elastomeric silicone compositions, addition cured injection moldable compositions or millable compositions, is reduced by the incorporation of nitrogen compounds wherein the nitrogen possesses at least one organic substituent and the nitrogen is tetravalent wherein the nitrogen is cationic. The adhesion of such compositions to thermoset or thermoplastic polymer substrates is improved by the addition of bis(trimethoxysilylpropyl)fumarate and a disilanol that may or may not contain alkenyl groups.

Abstract: A process to reduce the compression set of elastomeric silicone compositions, addition cured injection moldable compositions or millable compositions, comprises the incorporation of nitrogen compounds wherein the nitrogen possesses at least one organic substituent and the nitrogen is tetravalent wherein the nitrogen is cationic.

Abstract: Acetylenic maleates, fumarates and related derivative compounds are new compositions of matter having the formula:R.sub.1 O.sub.2 C--CH.dbd.CH--CO.sub.2 R.sub.2wherein R.sub.1 may be an organic moiety containing at least two carbon atoms triply bonded one to the other as:--C.tbd.C--and R.sub.2 may be hydrogen, an organic moiety, or R.sub.1 ; suitable for use as liquid injection molding inhibitors either singly or in combination with themselves or other liquid injection molding inhibitors when used for the process of liquid injection molding curable compositions enabling an increase in the size of articles manufactured therefrom, which new compositions of matter cure into the polymerizable or curable resins thereby creating new compositions of matter as cured resins from which said articles of manufacture are produced.

Abstract: Acetylenic maleates, fumarates and related derivative compounds are new compositions of matter having the formula:R.sub.1 O.sub.2 C--CH.dbd.CH--CO.sub.2 R.sub.2wherein R.sub.1 may be an organic moiety containing at least two carbon atoms triply bonded one to the other as:--C.tbd.C--and R.sub.2 may be hydrogen, an organic moiety, or R.sub.1 ; suitable for use as liquid injection molding inhibitors either singly or in combination with themselves or other liquid injection molding inhibitors when used for the process of liquid injection molding curable compositions enabling an increase in the size of articles manufactured therefrom, which new compositions of matter cure into the polymerizable or curable resins thereby creating new compositions of matter as cured resins from which said articles of manufacture are produced.

Abstract: Acetylenic maleates, fumarates and related derivative compounds are new compositions of matter having the formula:R.sub.1 O.sub.2 CCH.dbd.CH--O.sub.2 R.sub.2wherein R.sub.1 may be an organic moiety containing at least two carbon atoms triply bonded one to the other as:--C.tbd.C--and R.sub.2 may be hydrogen, an organic moiety, or R.sub.1 ; suitable for use as liquid injection molding inhibitors either singly or in combination with themselves or other liquid injection molding inhibitors when used for the process of liquid injection molding curable compositions enabling an increase in the size of articles manufactured therefrom, which new compositions of matter cure into the polymerizable or curable resins thereby creating new compositions of matter as cured resins from which said articles of manufacture are produced.

Abstract: The present invention provides novel vinyl containing organopolysiloxane elastomers which possess excellent low compression set and heat aging characteristics and which can advantageously be formulated into liquid silicone elastomer moldable compositions.

Abstract: The present invention provides novel vinyl containing organopolysiloxane elastomers which possess excellent low compression set and heat aging characteristics and which can advantageously be formulated into liquid silicone elastomer moldable compositions.

Abstract: An extrudable composition formed of a blend of a polymer and a finely divided filler is prepared by combining the materials under conditions of high shear forces resulting in a composition which when diluted to a selected level has an application rate which is relatively higher than a composition having the same relative proportions of polymer and filler combined under conditions of low shear, the high shear forces reducing the aggregate size. The invention is also directed to a method for reducing the initial average aggregate size of a filler dispersed in a polymer by subjecting the mixture to high shear forces in a high intensity mixer.

Abstract: The present invention relates to a method for making nitrosamine-free silicone articles by treating the mixture of vinyl containing organopolysiloxane and filler with hindered phenols, a nitrosamine-free composition and a nitrosamine-free article made therefrom. A preferred nitrosamine-free molded article is a baby bottle nipple.