摘要:
This invention relates to the injection moldable and extrusion type electrically conductive polymeric blend compositions preferably having a viscosity at 200°C at 0.73 sec -1 of less than about 8 x 10 5 poises. The compositions used for elastomeric articles include a neutralised sulphonated polymer; graphite fibre at a concentration of 1 to 50 parts by weight per 100 parts by weight of neutralised sulphonated polymer; and a preferential plasticiser at less than 60 parts by weight based on 100 parts by weight of the neutralised sulphonated polymer. The compositions may also optionally include fillers, oils and other additives. These blend compositions can be readily processed due to their superior rheological properties on conventional plastic fabrication equipment, especially on low and high pressure injection molding or extrusion equipment into electrically conductive articles having excellent physical and electrical properties.
摘要:
This invention relates to improved polymeric compositions of metal, amine and ammonium neutralized sulfonated polymers which are preferentially plasticized with an N-substituted organic carbamate at a minimum critical concentration level of 1 to 75 parts by weight based on 100 parts by weight of the neutralized polymer, wherein N-substituted organic carbamate has the formula:
or wherein R, and R 2 are normal or branched chain alkyl, cycloalkyl, aryl, alkaryl or aralkyl groups such as ethyl, butyl, octadecyl, behenyl, phenyl, benzyl and dodecylphenyl and R. and R 6 and preferable either R, or R 2 must be a long chain, preferably linear, saturated group containing from 10 to 50 carbon atoms and R 3 and R 5 are di, tri or tetrafunctional aliphatic, cycloaliphatic, aryl or alkaryl groups and m is 2, 3 or 4 and n is 2, 3 or 4.
摘要:
Elastomeric compositions comprising a blend of a neutralized sulphonated elastomeric polymer (e.g. sulphonated EPDM) having 10 to 60 meq sulphonate groups per 100 grams of polymer and 5 to 75 parts of an urea or thiourea or 8 to 75 parts by weight of certain amines, e.g. an amino alkyl substituted napthylamine or a long chain n-alkyl amine. These compositions have good flow properties and can be made to process readily in moulding or extension operations.
摘要:
An elastomeric blend composition of a zinc neutralised sulfonated EPDM terpolymer having 10 to 60 meq. sulfonate groups per 100 grams of terpolymer and at least 8 parts by weight of terpolymer of zinc stearate. These compositions have improved flow properties compared with the unptasti- cized terpolymer.
摘要:
A free flowing powder of at least 50% neutralised sulphonated EPDM terpolymer of Mn 10,000 to 200,000, an ethylene content of 40 to 70 wt. % and a sulphonate content of 10 to 60 meq., sulphonate groups per 100 gm - terpolymer can be dry blended with extenders to form elastomeric articles.
摘要:
A neutralised sulfonated thermoplastic polymer when dissolved in a solvent system, e.g. tetrahydrofuran, so as to form a solution having a Brookfield viscosity at ambient temperature of 1,000 to 200,000 cps. results in a solution suitable for forming fibres. The solution is passed through a spinneret having a plurality of orifices.
摘要:
The present invention relates to a peroxide curable rubber compound comprising a peroxide curative and a high multiolefin halobutyl ionomer prepared by reacting a halogenated butyl polymer having a high mol percent of multiolefin with at least one nitrogen and/or phosphorus based nucleophile. The resulting high multiolefin halobutyl ionomer comprises from about 2 to 10 mol% multiolefin. The present invention is also directed to a shaped article comprising the rubber compound.
摘要:
A gas spring as shown in figure 7 includes an outer tube (47); a base plate (50); a head plate (53); an inner tube (48) mounted to extend between the head plate and the base plate; a piston/rod assembly mounted to reciprocate vertically in the inner tube between a retracted, compressed position and an extended, rest position; a valve ring (52) coaxially mounted around the rod (51) to reciprocate between the main piston (58) and head plate; a primary gas chamber (59); a relief chamber (60); a passageway (81) and a valve apparatus for controlling fluid flow between the primary and relief chambers. The valve apparatus operates to open and close the fluid flow as a function of the position and direction of travel of the piston/rod assembly.
摘要:
An encapsulated water soluble fertilizer which comprises a polymeric film of about 2 to about 100 micrometers coated on a surface of said fertilizer, said polymeric film comprising a covalently crosslinked sulfonated polymer having about 10 to about 200 meq of sulfonate groups per 100 grams of said covalently crosslinked sulfonated polymer, said sulfonate groups being neutralized with a polycaprolactone polymer being characterized by formula (I) wherein R1 and R2 is an alkyl, cycloalkyl or aryl group; R3, R4, and R5 are a hydrogen or alkyl, cycloalkyl, or aryl groups; m equals 1 to 20 and n equals 1 to 500.
摘要:
The present invention relates to thermoplastic reinforced elastomeric blend compositions which exhibit improved tensile strengths, wherein the elastomeric blend compositions comprises a blend of a metal neutralized sulfonated polymer with about 1 to about 40 weight percent of a metal neutralized copolymer of ethylene and methacrylate.