摘要:
A process for fabricating a plastic, which plastic is either a thermoplastic ionomer or a multiphase graft or block copolymer of the ABA, ##EQU1## or (AB).sub.n wherein n is greater than 1 and wherein the polymer blocks (A and B) are thermoplastic, incompatible with one another, and have different softening points, both softening points being substantially above room temperature when using the latter class of polymers. The material is first heated to a temperature above both softening points and formed into any desired shape, then cooled and re-formed into a new desired shape at a temperature between that of the softening points of the two blocks and finally cooled to a temperature below both softening points thereby retaining the shape last achieved. When using thermoplastic ionomers the process is similar. The material is heated above the softening point of the thermoplastic backbone and plasticisers are employed to disrupt the ionic domains. The process may be readily employed to prepare containers, bottles, or rigid foams and the like which may be shipped as compact materials and re-formed for actual use by simply reheating, etc.
摘要:
An improved process for the manufacture of extended gel free sulfonated elastomeric products includes the formation of a homogeneous mixture of fillers and oils with the acid form of the sulfonated polymer prior to the neutralization of the acid form of the sulfonated polymer with a basic material thereby resulting in a composition having improved physical properties.
摘要:
This invention relates to a process for the formation of a neutralized sulfonated polymer having about 10 to about 60 meq. sulfonate groups, wherein the sulfonate groups are neutralized with a zinc counterion. A cement of a polymer having olefinic functional groups and a non-reactive solvent is contacted with a sulfonated agent such as an acyl sulfate. The sulfonated polymer is then neutralized with a solution of zinc acetate dissolved in a solvent system of methanol alone or methanol and water, wherein the volume percent of methanol based on non-reactive solvent is less than about 10. A carboxylic acid can be then added to the cement of the neutralized sulfonated polymer thereby forming a zinc salt of the carboxylic acid in situ, wherein the zinc salt of the carboxylic acid is a preferential plasticizer for the zinc sulfonate groups. The Brookfield viscosity at 0.6 rpm at room temperature of the cement of the zinc neutralized sulfonated polymer is less than about 50,000 cps.
摘要:
This invention relates to an improved process for the formation of an improved gel-free neutralized sulfonated elastomeric polymer having about 10 to about 50 meq. unneutralized sulfonate groups, wherein the unneutralized sulfonate groups are neutralized with a metal counterion being selected from the group including lithium, sodium, potassium, cesium, barium, calcium, magnesium, zinc, lead, iron (II), copper (II), mercury (II), and nickel. A cement of an elastomeric polymer having olefinic functional groups dissolved in a non-reactive solvent is contacted with a sulfonating agent such as an acyl sulfate thereby sulfonating the elastomeric polymer, and the sulfonation reaction is subsequently quenched by the addition of isopropanol at a concentration level of about 5 to about 30 volume percent based on a volume of the non-reactive solvent. The unneutralized sulfonated elastomeric polymer is then neutralized with a neutralizing agent dissolved in water, the water being at a concentration level of less than about 2.5 volume percent based on the volume of the non-reactive solvent thereby forming a gel-free cement of the neutralized sulfonated elastomeric polymer having a Brookfield viscosity at room temperature of less than about 20,000 cps.
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 at least 1 part by weight based on 100 parts by weight of the neutralized polymer, wherein N-substituted organic carbamate has the general formula selected from the group of: ##STR1## wherein R.sub.1, and R.sub.2 are normal or branched chain alkyl, cycloalkyl, aryl, alkaryl, or arylalkyl groups such as ethyl, butyl, octadecyl, behenyl, phenyl, benzyl, and dodecylphenyl and R.sub.4 and R.sub.6 and either R.sub.1 or R.sub.2 must be a long chain, preferably linear, saturated group containing from about 10 to about 50 carbon atoms and R.sub.3 and R.sub.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:
Improvements in the treatment of wells that penetrate subterranean formations are accomplished through the use of a polymer solution which includes a neutralized ionomeric polymer dissolved in an organic solvent and a polar cosolvent. The polymer has a backbone that is substantially soluble in the organic solvent and pendant ionomeric groups that are substantially insoluble in the organic solvent. The polar cosolvent solubilizes the pendant ionomeric groups such that the polymer solution upon introduction into the well has a viscosity less than about 20,000 centipoises and upon mixing with water the polar cosolvent is taken up by the water causing the polymer to aggregate and increase in viscosity sufficient to form a plug. The polymer solution may be used in well drilling operations, well completion operations, and secondary recovery operations.
摘要:
This invention relates to extrusion and injection moldable type elastomeric compositions having a viscosity at 200.degree. C. at 0.73 sec.sup.-1 of about 8.times.10.sup.4 to about 8.times.10.sup.5 poises. The compositions used for elastomeric articles include 100 parts of a neutralized sulfonated EPDM terpolymer; about 25 to about 150 parts per hundred of a non-polar process oil; about 50 to about 300 parts per hundred of a filler; and a preferential plasticizer at about 0 to about 50 parts per hundred based on 100 parts of the sulfonated elastomeric polymer. The composition may also include a crystalline polyolefinic thermoplastic at less than about 100 parts per hundred by weight.These blend compositions can be readily processed due to their superior rheological properties on conventional plastic fabrication equipment into elastomeric articles having excellent physical properties and desirable rubbery characteristics.
摘要:
This invention relates to injection moldable type elastomeric compositions having a viscosity at 200.degree. C. at 0.73 sec.sup.-1 of less than about 8.times.10.sup.4 poises. The compositions used for elastomeric articles include 100 parts of a neutralized sulfonated EPDM terpolymer; about 25 to about 150 parts per hundred of a non-polar process oil; about 25 to about 200 parts per hundred of a filler; and a preferential plasticizer at about less than 50 parts per hundred based on 100 parts of the sulfonated elastomeric polymer. The composition may also include a crystalline polyolefinic thermoplastic at least than about 100 parts per hundred by weight.These blend compositions can be readily processed due to their superior rheological properties on conventional plastic fabrication equipment, especially on low pressure injection molding equipment into elastomeric articles having excellent physical properties and desirable rubbery characteristics.
摘要:
This invention relates to plasticized metal neutralized sulfonated EPDM terpolymers having at least 65 wt. % of ethylene in the backbone of the EPDM terpolymer and extended compositions of these metal neutralized sulfonated EPDM terpolymers having 100 parts of a neutralized sulfonated EPDM terpolymer; less than about 100 parts per hundred of a non-polar process oil; less than about 300 parts per hundred of a filler; and a preferential plasticizer at about less than 60 parts per hundred based on 100 parts of the sulfonated elastomeric polymer. These compositions can be readily processed due to their superior rheological properties on conventional plastic fabrication equipment, especially on low pressure injection molding and extrusion equipment into elastomeric articles having improved physical properties.
摘要:
This invention relates to a process for the manufacture of a blend composition of a neutralized sulfonated ethylene propylene terpolymer (EPDM) which includes the steps of sulfonating the EPDM dissolved in a solvent to form an unneutralized sulfonated elastomeric polymer. The solution of the unneutralized sulfonated EPDM is quenched with an aliphatic alcohol. The unneutralized sulfonated elastomeric polymer in solution is then neutralized with a neutralizing agent to form the neutralized sulfonated EPDM in solution. A critically selected non-polar backbone process oil is added under agitation to the solution thereby plasticizing the neutralized sulfonated EPDM with the process oil. The neutralized sulfonated EPDM plasticized with the process oil is then recovered from the solution.