MXPA96004081A - Elastomeric composition which has low compress hardness - Google Patents

Abstract

A polymeric composition having excellent characteristics for seals and gaskets including dimensional stability, low compression hardening and notorious sealing characteristics, the polymer composition being characterized in that it comprises a vulcanized mixture of (1) a rubber polymer that is comprised of repetitive units that are derived from (a) butyl acrylate, (b) at least one member selected from the group consisting of methyl methacrylate, ethyl methacrylate, methylacrylate and ethylacrylate, (c) acrylonitrile, (d) styrene, (e) a soap of medioester maleate, and (f) a crosslinking agent, (2) at least one thermoplastic resin, and (3) at least one material containing epoxy group

Description

ELASTOMERIC COMPOSITION THAT HAVE UNDER COMPREHENSION HARDENING BACKGROUND OF THE INVENTION Seals for automotive body ications (such as windows, hoods, trunks, and doors) and construction ications (such as window glazing gaskets and weather strips) must be dimensionally stable, -provide under hardening of compression and offer notorious sealing characteristics through a wide scale of temperature. These seals must be able to seal against wind and water, while providing light resistance for long-term use. At the same time, the material used in the seal must offer the degree of flexibility required for the particular ication. The exterior and door weather strips for automobiles and trucks is a volume ication for these seals. However, seals that offer essentially the same features are also needed for solar roof seals, handle gaskets, window spacers, window guides, lock seals, windshield wiper pivot seals, and in construction ications such as these. as window glazing packages and seals against in temperie. The rubbery mixtures of polyvinyl chloride (PVC) on a nitrile rubber (NBR) have been used sometimes in slogans for automotive body ications. The nitrile rubber is included in these mixtures as a permanent modifier for PVC that provides it with a higher degree of flexibility. However, the use of conventional nitrile rubber in such blends typically results only in moderate compression hardening characteristics. It is very important that sealis have good compression hardening characteristics in most ications. For example, improved resistance to water leakage and wind noise can be achieved by using a seal that has low compressive hardening characteristics. It is known from the teachings of UK Patent ication No. 9214969.9 that the characteristics of low compression hardness can be improved by using a technique known as "dynamic vulcanization" through a free radical generator, such as azo compounds or organic peroxides. However, this "dynamic vulcanization" technique suffers from the weakness that the required organic azo compounds or peroxides reduce the thermal stability of the polyvinyl chloride resin and the ultraviolet light resistance of the nitrile rubber. There is also an increased risk of early retreatment during processing that leads to reduced burning and recycling. U.S. Patent 5,362,787 discloses a highly crosslinked nitrile rubber that can be easily mixed with PVC to make compositions having an excellent combination of properties for use in making seals and packs for automotive and construction ications. PVC mixtures made with highly crosslinked nitrile rubbers offer excellent dispersion behavior, dimenional stability, low compression hardening, well-known sealing characteristics and low temperature flexibility. U.S. Patent 5,362,787 more specifically discloses a highly reticulated nitrile rubber composition that can be mixed with polyvinyl chloride to make -compositions that have excellent characteristics for seal seals including dimensional stability, low compression set, marked sealing characteristics and good flexibility at low temperature, the highly crosslinked nitrile rubber composition being comprised of 91) a highly crosslinked nitrile rubber having repeating units derived from (a) 1,3-butadiene, (b) acri lonitri lo, and (c) a crosslinking agent, wherein the highly-crosslinked nitrile rubber has a Mooney viscosity of about 50 to about 120, a swelling index of less than about 10-percent, a shrinkage of milling of less than 10 percent, and a gel content greater than 90 percent; and (2) from about 1 to about 30 phr of a plastist. U.S. Patent 5,380,785 and U.S. Patent 5,415,940 describe a rubbery polymer which can be mixed with polyvinyl chloride to make skin type compositions having good thermal and ultraviolet light resistance, the rubbery polymer being comprised of - repeating units which are comprised of 9a) bilayl acrylate, or optionally a mixture of butyl acrylate and 2-ethylhexyl acrylate containing up to about 40% of 2-ethylhexyl acrylate, (b) at least one selected member from the group consisting of methyl methacrylate, methyl methacrylate, methyl lacium, and ethyl lactide, (c) acrylonitrile, (d) styrene, 9e) a medium maleate soap ester, and (f) an agent of crosslinking.

SUMMARY OF THE INVENTION The present invention relates to a polymer composition having an excellent combination of properties to be used in making seals and packaging for automotive and construction applications, such as window glazing packaging. These polymeric compositions offer excellent dimensional stability, low compression hardening, well-known sealing characteristics, low temperature flexibility, heat resistance and ultraviolet light resistance. The present invention more specifically describes a polymeric composition having excellent characteristics for seals and gaskets including dimensional stability, low compression set and noticeable sealing characteristics, the polymer composition being comprised of a vulcanized mixture of (a) a rubbery polymer that it is comprised of repeating units derived from 9a) butyl acrylate, (b) at least one member selected from the group consisting of methylmethacrylate, methylmethacrylate, methacrylate, and ethacrylate, (c) ) acri lonitri lo, (d) styrene, (e) medium ester maleate soap, and (f) a crosslinking agent; (2) when I get a thermoplastic resin; and (3) at least one material containing epoxide group. The present invention also discloses a window glazing package that is comprised of a vulcanized mixture of (1) a rubbery polymer that is comprised of repeating units derived from 9a) butyl acrylate, (b) at least one member selected from the group consisting of methylacrylate, methylmethacrylate, methylurea and ethyl acrylate, (c) acrylonitrile, (d) styrene, 9e) a medium ester ester soap, and 9f) a crosslinking agent; (2) at least one thermoplastic resin; and (3) at least one material containing epoxide group. The present invention further discloses a process for making a polymeric composition having excellent characteristics for seals and gaskets including dimensional stability, low compression hardening and marked sealing characteristics, the process being comprised of hydraulically vulcanizing 91) a rubbery polymer that it is comprised of repeating units that are derived from (a) -butyl acrylate, (b) at least one member selected from the group consisting of methymethacrylate, methylmethacrylate, methylacrylate, and ethyl alcohol. lato, (cj acri lonitri lo, (d) styrene, (e) a half ester ester mastic soap, and f) a crosslinking agent; . { 2) at least one thermoplastic resin; and 33) at least one material containing epoxide group; wherein the dynamic vulcanization is conducted at an elevated temperature which is within the range of about 100 ° C to about 210 ° C under shearing conditions.

Detailed Description of the Invention The rubbery polymers that are used in the polymeric compositions of this invention are described in U.S. Patent 5,380,785 and U.S. Patent No. 5,415,940 which are incorporated herein by reference in the -present in its entirety Chewy polymers of this type are commercially available from The Goodyear Tire & - (R) Rubber Company are sold as Sunigunr 'rubber. These rubbery polymers are synthesized using a free radical emulsion polymerization technique and are comprised of repeating units which are derived from (a) butyl acrylate or optionally a mixture of butyl acrylate and 2-ethylhexyl acrylate containing up to about 40% 2-ethylhexyl acrylate, (b) methylmethacrylate, ethylmethacrylate, methylurea or ethyl alcohol, (c) acrylonitrile, (d) is styrene, (e) maleate soap. half ester, and (f) a crosslinking agent. The crosslinking agent is typically a multifunctional acrylic to a multifunctional methacrylate or di vini lbenzene Technically, these rubbery polymers contain repetitive (chain link) acids that are derived from (a) butyl acrylate or optionally a mixture of butyl acrylate and 2-ethylhexyl acrylate containing up to approximately 40% acrylate. 2-ethylhexyl, (b) methyl methacrylate, methacrylate, methacrylate or ethyl lactide, (c) acrylonitrile, (styrene, (e) a medium ester maleate soap, and (f) a cross-linking agent These repetitive units differ from the monomers from which they were derived in that they contain a double carbon to carbon bond less than is present in the respective monomer.In other words, a carbon-carbon double bond is It consumes during a polymerization of the monomer towards a repeating unit in the rubbery polymer Thus, by saying that the rubbery polymer contains various monomers, it actually means that it contains repeating units which are derived from these monomers. The rubbery polymer will normally contain (a) from about 40 weight percent to about 80 weight percent butyl acrylate, or optionally a mixture of butyl acrylate and 2-ethylhexyl acrylate containing up to 40 percent. by weight of 2-ethylhexyl acrylate, (b) from about 5 weight percent to about 35 weight percent of methylmethacrylate, methylmethacrylate, methacrylate or ethylacrylate, (c) ) from about 4 weight percent to about 3 weight percent acrylonitrile, (d) from about 3 weight percent to about 25 weight percent styrene, (e) from about 0.5 weight percent to about 8 weight percent of a medium ester maleate soap, and (f) from about 0.25 weight percent to about 8 weight percent of a crosslinking agent. These rubbery polymers will preferably contain (a) from about 50 weight percent to about 80-weight percent butyl acrylate, or optionally a metric of butyl acrylate and 2-ethylhexyl acrylate containing up to about 10% by weight of butyl acrylate. 40% of 2-ethylhexyl acrylate, (b) from about 3 weight percent to about 35 weight percent of at least one member selected from the group consisting of methylmethacrylate, eti methacrylate, lato, meti lacri 1 a and eti lacri lato, (c) from about 6 weight percent to about 30 weight percent acri lonitri, (d) from about 5 weight percent to about 18 percent by weight percent by weight of styrene, (e) from about 1 weight percent to about 5 weight percent of an ester maleate soap, and (f) from about 0.5 percent to about 4 percent by weight of a crosslinking agent. The rubbery polymer more preferably will be compacted. of repeating units which are derived from (a) about 55 weight percent to about 75 weight percent butyl acrylate, or optionally a mixture of butyl acrylate and 2-ethylhexyl acrylate containing up to about 40% of 2-ethylhexyl acrylate, (b) from about 5 weight percent to about 20 weight percent of at least one member selected from the group consisting of methyl methacrylate, methyl methacrylate, , methyl alcohol and ethyl alcohol, (c) from about 10 weight percent to about 25 weight percent alcohol content, (d) from about 8 weight percent to about 14 percent in weight of styrene, (e) from about 2 weight percent to about 4 weight percent of a medium ether maleate soap, and (f) from about 1 weight percent to about 3 weight percent. percent by weight of a crosslinking agent. The procedures reported in this paragraph are based on the total weight of the rubbery population. The rubbery polymers used in the polymeric compositions of this invention are synthesized in an aqueous reaction mixture using a free radiolimetric polymerization technique. The reaction mixture used in this plimering technique is comprised of water, the appropriate monomers, an appropriate free radical initiator, a crosslinking agent, a medium ester maleate soap, and a metal salt of an alkyl sulfonate or a metal salt of an alkali sulfate. The reaction mixture used in this polymerization technique will usually contain from about 10 percent by weight to about 80 percent by weight of monomers, based on the total weight of the reaction mixture. The reaction mixture will preferably contain from about 20 weight percent to about 70 weight percent monomers and more preferably contain from about 40 weight percent to about 50 weight percent monomers / Mixtures The reaction rates used in carrying out polymer dyes typically will range from about 0.00 phr (parts per hundred parts of monomer by weight) to about 2 phm from at least one member selected from the group consisting of metal salts. of alkyl sulfates and metal salts of alkyl sulfonates. It is generally preferred that the reaction mixture contain from about 0.008 phr to about 0.5 phm of the metal salt of the alkyl sulfonate or the metal salt of the alkyl sulfate. It is usually more preferred that the reaction mixture contain from about 0.05 phm to about 0.3 phm of the metal salt of the alkyl sulfonate or the metal salt of the alkyl sulfate. The free radical polymerization technique used in this synthesis is usually initiated by including a free radical initiator in the reaction mixture. Virtually any type of compound capable of generating free radicals can be used as the free radical initiator. The free radi cal generator is normally employed at a concentration within the range of about 0.01 phm to about 1 phm. The free radical initiators that are commonly used include the various peroxygen compounds such as potassium persulfate ammonium persulfate, benzoyl peroxide, hydroxygen peroxide di-t-butyl peroxide, dicumyl peroxide, 2,4-peroxide. -di-chlorobenzoyl, decanoyl peroxide, lauryl peroxide, eumeno hydroperoxide, p-menthane hydroperoxide, t-butyl hydroperoxide, acetyl peroxide, methyl-lei-oxime peroxide, succinic acid peroxide, dicetyl peroxydicarbonate, peroxiac tato of tb tuko, t-butyperoxymetholic acid, t-butyl peroxybenzoate, acetyl cyclohexyl sulfonyl peroxide and the like the various acoic compounds such as 2-t-butylo-2-cyanide propane, dimethyl azodi isobutyrate, azodi isobuti lronitri lo, 2-tb ti loo-1-cyanocyclohexane, 1-t-ami loo-1-cyanocyclohexane and the like, the various alkyl percetals, such as 2,2-bi (t-buti 1-peroxy) butane and the like. Water-soluble peroxygen-free radical initiators are especially useful in such aqueous polymerizations. These emulsion polymerizations are typically carried out at the temperature ranging from about 20SC to 885C. At temperatures above about 88 ° C, alkyl acrylate monomers, such as butyl acrylate, have a tendency to boil. In this way, a pressurized camis would be required to heat said alkyl acrylate monomers to temperatures in excess of about 88 ° C. On the other hand - at polymerization temperatures of less than roughly 55 ° C, an oxidation reduction initiator system is required to ensure optimum temperature.satisfactory polymerization. Sulfonate surfactants which are useful in such polymerizations are commercially available from a wide variety of sources. For example, Du Pont sells al_l_ MR qui lari sodium sulfonate under the trade name Alkanor, Browning Chemical Corporation sells dodecyl sulfenonates from so MR dio under the trade name Ufaryl Dl-85, and Ruetgers-Nease Chemical Company sells sodium sulfonate eumeno under the name - commercial MR Naxonate Hydrotrope. Some representative examples of sulfonate surfactants that can be used include sodium toluene-xi sodium sulfonate, sodium toluene sulphonate sodium sulmensulfonates, sodium sodium sulfonate, sodium decollensulfonate, sodium dodecyl sulfonate sulfonate, 1 - sodium octansulfonate, sodium tetradecansulfonate, sodium tadecansulfonate, sodium heptadecansulfonate and potassium toluene sulfonate. The metal salts of alkyl benzene sulfonates are a highly preferred class of sulfonate surfactant. The metal will generally be sodium or potassium with sodium being preferred. The sodium salts of alkyl benzene sulfonates have the structural formula: wherein R represents an alkyl group containing from 1 to about 20 carbon atoms. It is preferred that the alkyl group contains from about 8 to about 14 carbon atoms The free radical emulsion polymerization used in synthesizing the rubbery polymer is typically conducted at a temperature that is within the range of about 10 Q to about 95eC. In most cases, the polymerization temperature used will vary between about 20 ° C and about 80 ° C. The polymerization is carried out as a two-step batch process. In the first stage, a seed polymer containing latex is synthesized. This has been achieved by using (a) butyl acrylate or optionally a mixture of butyl acrylate and 2-ethylhexyl acrylate containing up to about 40% 2-ethylhexyl acrylate, (b) when at least one member selected from the group consisting of methymetacri lato, eti lmetacri lato, meti lacri lato and eti lacri lato, (c) acri lonitri lo, and 9d) a crosslinking agent. The latex containing seed polymer is prepared-typically by polymerizing a monomer mixture containing about 40 to about 90 weight percent butyl acrylate, or optionally a mixture of butyl acrylate and 2-acrylate. ethylhexyl containing up to about 40% 2-ethylhexyl acrylate, from about 5 to about 35 weight percent methyl methacrylate, ethyl tacrilate, methylacrylate or ethyl lactide, from about 2 to about 30 percent by weight of acrylonitrile, and from air of 0.25 percent by weight to 6 percent by weight of the crosslinking agent. It is typically preferred that the momer component used in the first step include from about 5 weight percent to about 85 weight percent butyl acrylate, or optionally a mixture of butyl acrylate and 2-ethylhexyl acrylate which contains up to about 40% acrylate of 2-ethylhexyl 1, from about 5 weight percent to about 30 weight percent of ethyl acrylate, methyl methacrylate, methyl lactic acid or methyl methacrylate, from 4 weight percent to about 28 weight percent acrylonitrile, and about 0.5 weight percent about 4 weight percent of the crosslinking agent. It is generally preferred more than the monomer loading composition used in synthesizing the seed polymer latex having from about 60 weight percent to about 80 weight percent butyl acrylate, or optionally an acrylate grade. of butyl and 2-ethylhexyl acrylate containing up to about 40% 2-ethylhexyl acrylate, from about 5 weight percent to about 25 weight percent methyl methacrylate, methyl methacrylate, methyl alcohol lato or et i 1-acrylate, from about 5 weight percent to about 25 weight percent acri lonitri, and from about 1 to about 3 weight percent crosslinking agent. After the seed polymer latex has been prepared, styrene monomer, additional acrylonitrile monomer and additional cross linking agent are added to the latex containing seed polymer. As a general rule, from about 4 parts by weight to about 30 parts by weight of styrene, from about 1 part by weight to about 20 parts by weight of additional acrylonitrile, and from about 0.0 to about 2 parts. by weight of the crosslinking agent will be added. In this second stage of the polymerization, it is preferred to add from about 6 parts by weight to about 22 parts by weight of styrene, from about 3 parts by weight to about 12 parts by weight of acrylonitrile, and from about of 0.05 parts by weight to 1 part by weight of the crosslinking agent. It is typically more preferred that from about 10 parts by weight to about 17 parts by weight of styrene, from about 4 parts by weight to about 8 part by weight of acrylonitrile, and from about 0.1 part by weight are added. to about 0.5 parts by weight of the crosslinking agent, to seed polymer latex to initiate the second phase of the polymerization. A wide variety of cross-linking agents can be used in the synthesis of the rubbery polymer. Some axes representative of crosslinking agents that can be used include difunctional acrylates, difunctional methacrylates, trifunctional acrylates, trifunctional methacrylates and di-vinylbenzene. Some specific examples of crosslinking agents that can be used include ethylene glycol di-vinylbenzene ethacrylate and 1,4-butanediol dimethacrylate. In practice, dimethacrylate 1,4-butanediol has proven to be particularly useful as the crosslinking agent. In most cases, the polymerization will continue until a high monomer conversion has been achieved. At this point, the rubbery polymer made by the two-stage batch polymerization process is recovered from the emulsion (latex). This can be done using conventional coagulation techniques. For example, coagulation can be accomplished by the addition of salts, acids, or both to the latex. The medium ester maleate soap used in the operation is prepared by reacting maleic anhydride with a fatty alcohol containing from about 10 to about 24 carbon atoms. Typically it is preferred to use a fatty alcohol containing from about 12 to about 16 carbon atoms. One mole of maleic anhydride is reacted with a mold to the fatty alcohol by producing the half ester ester maleate soap. This reaction is typically conducted at a temperature that is within the range of about 50 ° C to about 80 ° C and can be illustrated as follows: Sodium hydroxide or potassium hydroxide is then added typically to form the medium ester maleate soap. This et pa can be illustrated as follows: 0 0 II CH C OH CH c o? ? f + KOH - + H20 CH C C16H33 CH II í. C16H33 0 After the rubbery polymer is recovered by coagulation, it is dried. It is sometimes advantageous to convert the rubbery polymer into a powder to facilitate its use. In this case, it will be beneficial to add a dividing agent to the rubbery polymer. Some representative examples of dividing agents that can be employed include calcium carbonate, polyvinyl chloride in emulsion and silica. Calcium carbonate is a highly desirable dyeing agent that can be used in such applications.

A wide variety of thermoplastic resins may be employed in the polymer compositions of this invention. For example, the thermoplastic resin may be a halogenated thermoplastic resin or it may be a non halogen free thermoplastic. Some representative examples of thermoplastic resins that can be used include polyvinyl chloride (PVC), chlorinated polyethylene, polyvinyl chloride grafted with vinyl acetate, polyvinyl chloride grafted with butyl acetate, eti lenvini lacetato, eti lenvini lacetato / monoxide copolymer carbon, ethanol / polyethylene terpolymer / polyethylene carbon monoxide, polypropylene, ABS resins, block copolymers acri lonitri lo / styrene / acri lonitri lo (ASA resins), styrene / butadiene / esitrene block copolymers ( SBS resins), styrene block terpolymer resins / eti lenbuti leno / styrene, resins of thermoplastic polyurethane and nylon resins. The ABS resins that can be used are amorphous thermoplastics synthesized by using acrylonitrile, butadiene and styrene. ABS resins are usually made by polymerizing 1, 3-butadiene monomer to polybutadiene after which styrene and acrylonitrile monomers are added and polymerized (grafted) to the polybutadiene. PVC resins have proven to be very useful in the practice of this invention. The material containing epoxide group can be virtually any type of compound or polymer having a bridge -0- in it which is attached to different carbon atoms which are otherwise bound. The material containing epoxide group will normally be an epoxy resin. The types of epoxy resins that can be used include bisphenol-A epichlorohydrin resins, halogenated epoxy resins, flexi fi cation epoxy resins, aliphatic epoxy resins, and high functional epoxy resins. The polymeric compositions of this invention will normally contain from about 20 weight percent to about 70 weight percent of the rubbery polymer, from about 25 weight percent to about 70 weight percent of the thermoplastic resin, and from about 1 weight percent to about 10 weight percent of the epoxide group-containing material. The polymer composition will more typically contain from about 30 weight percent to about 65 weight percent of the rubbery polymer, from about 30 weight percent to about 65 weight percent of the thermoplastic resin, and from about 2 weight percent. weight percent to approximately 8 weight percent of the material containing epoxide group. The polymer composition preferably will contain from about 40 weight percent to about 60 weight percent of the rubbery polymer, of about 35? weight percent to approximately 55 weight percent of the thermoplastic resin, and from about 3 weight percent to -about 6 per weight percent of the epoxide-containing material.

The polymeric compositions of this invention are mixed by mixing the rubbery polymer, the thermoplastic resin, and the epoxide-containing material and dynamically vulcanizing them at an elevated temperature. Dynamic vulcanization differs from conventional static vulcanization techniques in that vulcanization occurs during the mixing or chewing of the composition being prepared. Dynamic vulcanization is typically carried out under high shear forces necessary for the complete mixing of the rubbery polymer, the opnestic resin and the polymer containing epoxy group. The dynamic vulcanization is carried out at a temperature which is suitable for vulcanizing the mixture. This temperature will normally be within the range of about 100 eC to about 2209 In most cases vulcanization dynamics will be conducted at a temperature that is within the range of about 120SC to about 210 SC. It is usually preferred that the dynamic vulcanization is conducted at a temperature of about 130 ° C to about 2009 ° C. This invention is illustrated by the following example which is simply for the purpose of illustration and should not be construed as limiting the scope of the invention or the wording in which it can be practiced. Unless specifically indicated otherwise, the parts and processes are provided by weight.EXAMPLE 1 In this experiment, a polymeric composition having excellent characteristics for seals and packing was made using the techniques of this invention. In the process a dry mixture containing 100 parts of PVC, 50 parts of dioctyl phthalate, 3 parts of Ba / Zn stabilizer and 10 parts MR of Epikote 828 epoxy resin were mixed at a temperature of - (R ) 150 SC with 148 parts of Sunigupr 'SNP7395 rubbery polymer in a Haake 90 Rehocord at 50 rpm for 20 minutes. The increased torque of about 850 mg to about 1400-mg indicates that a vulcanization reaction occurred in situ - (dynamic vulcanization). It should be noted that without MR Dpikote 828 resin the torque only increased from 850 mg to approximately 1000 mg after maintaining the mixture at 150 SC for 20 minutes at 50 rpm. After the dynamic vulcanization was completed, the polymer mixture was melted at 180 ° C. for 6 minutes in the -molino and molded at 180 ° C. for 10 minutes. The polymer sample made by this dynamic vulcanization process had a Shore A hardness of 70, a tensile strength of 9.9 MPa, an elongation at break of 189%, a 100% modulus of 6.3 MPa, and a hardening of compression after 24 hours at 709C of only 49. A sample made without including the epoxy resin - MR Epilote 828 had a Shore A hardness of 70, a tensile strength of 7.9 MPa, a; Elongation at break of 186%, a yield at 100% of 5.5 MPa and a compression hardening after 24 hours at 709C out of 62. In this way, this experiment shows that including the epoxy resin in the mixture that was vulcanized dynamically greatly improved compression hardening without sacrificing other physical properties. The polymer composition made had excellent characteristics for use in making seals and packaging. Variations on the present invention are possible in light of the description thereof provided herein. Although certain embodiments and representative details have been shown for the purpose of illustrating the present invention, it will be apparent to those skilled in the art that various changes and modifications may be made therein without departing from the scope of the present invention. Therefore, it should be understood that changes can be made to the described particular embodiments that will fall within the intended scope of the invention as defined by the following attached clauses.

Claims (19)

1. - A polymeric composition having excellent characteristics for seals and gaskets that include dimensional stability, low compression hardening and noticeable sealing characteristics, the polymeric composition being characterized in that it comprises a vulcanized mixture of (1) a rubbery polymer that is comprised of repeating units that are derived from (a) butyl acrylate, (b) at least one member selected from the group consisting of methylmethacrylate, methylmethacrylate, methylurea, and ethylurea, (c) acrylonitrile, (d) styrene, (e) a medium ester maleate soap, and (f) a crosslinking agent; (2) at least one resin moplastic; and 93) at least one material containing epoxide group.

2. A window glazing package which is terrestrial in that it is comprised of a vulcanized mixture of (1) a rubbery polymer which is comprised of repeating units which are derived from (a) butyl acrylate, (b) at least one member selected from the group consisting of methylmethacrylate, methylmethacrylate, methylmercury and ethyl ester, (c) acrylonitrile, (d) styrene, (e) a medium ester maleate soap , and 9f) a crosslinking agent; (2) at least one thermoplastic resin; and (3) at least one material containing epoxide group.

3. - A process for making a polyurethane composition having excellent characteristics for seals and gaskets including dimensional stability, under compression hardening and notorious sealing characteristics, the process being characterized in that it is comprised of dynamically vulcanizing 91) a rubbery polymer which is comprised of repeating units derived from (a) butethyl acrylate, (b) at least one member selected from the group consisting of methymetacri lato, etimmetacri lato, meti lacri lato and eti lacri lato, (c) acri lonitri lo, (d) styrene), (e) a half ester ester maleate, and (f) a crosslinking agent; (2) at least one thermoplastic resin; and (3) at least one epoxide-containing material; wherein the dynamic vulcanization is conducted at an elevated temperature that is within the range of about 100 ° C to about 220 ° C under shear stress conditions.

4. A polymeric composition as specified in claim 1, characterized in that the thermoplastic resin is polyvinyl chloride.

5. A polymeric composition as specified in claim 4, characterized in that the material containing an epoxide group is an epoxy resin.

6. A polymeric composition as specified in the claim? 5, characterized in that the rubbery polymer is comprised of repeating units which are derived from about 40 to about 80 weight percent butyl acrylate, from about 5 to about 35 percent by weight of a selected member. from the group consisting of methyl ethacrylate, ethyl methacrylate, methylurea, and ethyl alcohol, from about 4 to about 30 weight percent acrylatel, from about 3 to about 25 weight percent styrene, from about 0.5 to about 8 weight percent of medium ester maleate soap, and from about 0.25 to about 8 weight percent of crosslinking agent.

7. A polymeric composition as specified in claim 5, characterized in that the rubbery polymer is comprised of repetitive units that are derived from 2-ethylhexyl acrylate and where the rubber-toso polymer contains repetitive units that they are derived from about 50 to about 80 weight percent butylacrylate, or optionally a mixture of buty lacrylate and 2-ethylhexyl acrylate containing up to about 40% of 2-ethylhexylacrylate., from about 3 to about 25 weight percent of a member selected from the group consisting of methylmethacrylate, methylmethacrylate, methacrylate and ethyl alcohol, from about 6 to about 25 percent by weight of acrylonitrile, from about 5 to about 18 weight percent of styrene, from about 1 to 5 percent by weight of medium ester maleate soap, and from about 0.5 to about 4 weight percent of crosslinking agent.

8. A polymeric composition as specified in claim 5, characterized in that the rubbery polymer is further comprised of repeating units that are derived from 2-ethylhexyl acrylate and wherein the rubbery polymer is comprised of repeating units which are derived from 55 to approximately 75 weight percent butyl acrylate, or optionally a mixture of butyl acrylate and 2-ethylhexyl acrylate containing up to about 40% -of 2-ethylhexyl acrylate. , from about 5 to about 20 weight percent methylmethacrylate, from about 10 to about 15 weight percent acrylonitrile, from about 8 to about 14 weight percent styrene, from about 20 to about 20 weight percent of styrene; about 2 to about 4 weight percent of medium ester maleate soap, and about 1 to about 3-weight percent crosslinking agent.

9. A polymeric composition as specified in claim 8, characterized in that the crosslinking agent is one or more members selected from the group consisting of divinylbenzene and 1,4butanediol-dimethacrylate.

10. A polymeric composition as specified in claim 6, characterized in that the mixture is comprised of from about 20 weight percent to about 70-weight percent of the rubbery polymer, of about 25 weight percent a about 70 weight percent of the thermoplastic resin, and from about 1 weight percent to about 10 weight percent of the epoxide group-containing material.

11. A polymer composition as specified in claim 7, characterized in that the mixture is comprised of from about 30 weight percent to about 65 weight percent of the rubbery polymer, of about 30 weight percent a approximately 65 weight percent of the thermoplastic resin, and from about 2 weight percent to about 8 weight percent of the epoxide group-containing material.

12. A polymeric composition as specified in claim 9, characterized in that the mixture is comprised of about 40 weight percent to about 60 weight percent of the rubbery polymer, about 35 weight percent of approximately 55 weight percent of the thermoplastic resin, and from about 3 weight percent to about 6 weight percent of the epoxide group-containing material.

13. A polymeric composition as specified in re-classification 12, characterized in that the polymer composition is made by dynamic vulcanization.

14. A method as specified in claim 3, characterized in that the process is carried out at a temperature that is within the range of about 120 ° C to about 210 ° C.

15. A process as specified in claim 3, characterized in that the thermoplastic resin is chlorine polyvinyl chloride.

16. A process as specified in claim 15, characterized in that the material containing epoxide group is an epoxy resin.

17. A process as specified in claim 16, characterized in that the rubbery polymer is comprised of repeating units that are derived from about 40 to about 80 weight percent butyl acrylate, from about 20 to 50% by weight. 5 to approximately 35 percent in-weight of a member selected from the group consisting of metimetacrial, eti lmetacri lato, meti lacri lato and eti lacri lato, from about 4 to about 30 weight percent of acrylonitrile, from about 3 to about 25 percent in-weight of styrene, from about 0.5 to about 8 percent by weight of medium ester maleate soap, and from about 0.25 to about 8 weight percent crosslinking agent.

18. A process as specified in claim 17, characterized in that the mixture is comprised of -about 20 weight percent to about 70 weight percent of the rubbery polymer, from about 25 weight percent to approximately 70 weight percent of the polyvinyl chloride resin, and from about 1 weight percent to about 10 weight percent of the epoxy resin.

19. A process as specified in claim 16, characterized in that the rubbery polymer is also combined with repeating units that are derived from 2-ethylhexyl acrylate and wherein the rubbery polymer is comprised of repetitive units that they are derived from 55 to approximately 75 weight percent butyl acrylate, or optionally a mixture of butyl acrylate and 2-ethylhexyl crilate containing up to about 40% 2-hetylhexyl acrylate, from about 5 to about 20 weight percent methylmethacrylate, from about 10 to about 14 weight percent acrylonitrile, from about 8 to about 14 weight percent styrene, and from about 1 weight percent. about 3 weight percent of crosslinking agent; wherein the crosslinking agent is one or more members selected from the group consisting of 1,4-di-butanediol di-benzene dimethacrylate; and wherein the mixture is purchased from about 55 weight percent to about 60 weight percent of the rubbery polymer, from about 35 weight percent to about 40 weight percent of the polyvinyl chloride resin, and from about 3 weight percent to about 5 weight percent of the epoxy resin.