CA1194246A - Plastic composition including propylene polymer, block copolymer of olefin and styrene segments and block copolymer of butyleneterephthalate and 1,4 butylene oxide segments - Google Patents
Plastic composition including propylene polymer, block copolymer of olefin and styrene segments and block copolymer of butyleneterephthalate and 1,4 butylene oxide segmentsInfo
- Publication number
- CA1194246A CA1194246A CA000408915A CA408915A CA1194246A CA 1194246 A CA1194246 A CA 1194246A CA 000408915 A CA000408915 A CA 000408915A CA 408915 A CA408915 A CA 408915A CA 1194246 A CA1194246 A CA 1194246A
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- Prior art keywords
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- weight
- ingredient
- poly
- block copolymer
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Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J153/00—Adhesives based on block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Adhesives based on derivatives of such polymers
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J167/00—Adhesives based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Adhesives based on derivatives of such polymers
- C09J167/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2666/00—Composition of polymers characterized by a further compound in the blend, being organic macromolecular compounds, natural resins, waxes or and bituminous materials, non-macromolecular organic substances, inorganic substances or characterized by their function in the composition
- C08L2666/02—Organic macromolecular compounds, natural resins, waxes or and bituminous materials
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2666/00—Composition of polymers characterized by a further compound in the blend, being organic macromolecular compounds, natural resins, waxes or and bituminous materials, non-macromolecular organic substances, inorganic substances or characterized by their function in the composition
- C08L2666/02—Organic macromolecular compounds, natural resins, waxes or and bituminous materials
- C08L2666/04—Macromolecular compounds according to groups C08L7/00 - C08L49/00, or C08L55/00 - C08L57/00; Derivatives thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2666/00—Composition of polymers characterized by a further compound in the blend, being organic macromolecular compounds, natural resins, waxes or and bituminous materials, non-macromolecular organic substances, inorganic substances or characterized by their function in the composition
- C08L2666/02—Organic macromolecular compounds, natural resins, waxes or and bituminous materials
- C08L2666/24—Graft or block copolymers according to groups C08L51/00, C08L53/00 or C08L55/02; Derivatives thereof
Abstract
CONNECTION OF POLYVINYL CHLORIDE TO
ESSENTIALLY POLYOLEFIN MATERIALS
Abstract of the Disclosure A connector (18) is provided capable of simultaneous sealing with improved strength to both polyvinyl chloride plastics and essentially polyolefin plastics. The formulation comprises certain block copolymers admixed with a small amount of polypropylene and optionally (ethylene-vinyl acetate).
ESSENTIALLY POLYOLEFIN MATERIALS
Abstract of the Disclosure A connector (18) is provided capable of simultaneous sealing with improved strength to both polyvinyl chloride plastics and essentially polyolefin plastics. The formulation comprises certain block copolymers admixed with a small amount of polypropylene and optionally (ethylene-vinyl acetate).
Description
CONNECTION OF POLYVINYL CHLORIDE TO
ESSENTIALLY POLYOLEFIN MATERIALS
Technical Field and Description o~ Prior ~rt In the copending U.S. Patent Application Serial No~
5 067,Q68r filed Augus~ 15, 1979, now U.S. Patent No.
4,327,726, by Peter C. Kwong and Dean G. Laurin, a connector member for dissimilar materials is disclosed.
Specifically, the connector member is made out of a plast~ ul~ion which is adherent both to polyvinyl 10 chloride and to cer~ain materials which are substantially of polyolefin nature. The connector may be heat sealed to the polyolefin-type material, while it is solvent-bonded to the polyvinyl chloride. Thus, for example, a blood bag made of a modified polyolefin-type material containing 15 polypropylene~ a block copolymer of polystyrene blocks and rubber polyolefin blocks, and poly(ethylene-vinyl acetate) may be bonded through such a connector to a polyvinyl chloride donor tube, where normally there is virtually no adhesion at all between those two materials.
Specifically, the material of the connector of the above-cited application i8 a mixture which comprises 65 percent o~ a blend of 20 parts by weight of a polypropylene-based material, 60 parts by weight of a polystyrene-poly(ethylene butylene) block copolymer, and 25 20 parts by weight of poly(ethylene-vinyl acetate); and 35 percent of a polyes~er type block copolymer.
However, while ~uch a material is solvent-bondable to polyvinyl chloride, it is not as strongly adherent to the polyvinyl chloride as might be desired in numerous circum-30 stances, since the bonded joint between the two materialscan be separated with a relatively low force.
In Hoh et al. U.S. Patent No. 3,832,314 a segmented copolyester adhesive and coating composition is disclosed %~
in ~hich a thermoplastic, segmented copolyester elastomer is mixed with a low molecular weight thermoplastic resin such as a styrene polymer, a chlorinated aliphatic hydro carbon wax or the like. Such a structure, however, is not 5 contemplated for the use of this invention, and does not include polystyrene-rubbery olefin block copolymer contem-plated for use in this invention.
In accordance with this invention, an improvement in the formulation disclosed in the above-cited patent appli-10 cation is provided, resulting in a plastic composition anda connector member made of such composition which is capable of simultaneous, stronger sealing to both poly-vinyl chloride plastics and essentially polyolefin plastics ranging from polypropylene to the modified 15 polyolefin plastic formulation described above containing the polypropylene, the polystyrene-rubbery polyolefin block copolymer, and the poly(ethylene-vinyl acetate).
Description of the Invention f ~, In accordance with~th~l~s invention, a plastic composi-20 tion i8 ~rovided which is capable of simultaneously seal-ing to both polyvinyl chloride plastics and essentially polyolefin plastics. The formulation comprises:
(a) from 1 to 8 percent by weight of a polyolefin consisting essentially of propylene units;
(b) from ~0 to 65 percent by weight of a block copolymer, having thermoplastic rubber characteristics, consisting essentially of blocks, preferably comprising 50 to 85 percent by weight of the polymer molecule, of a rub-bery olefin polymer, and blocks of polystyrene;
(c) from 35 to 55 percent by weight of a ~lexible block copolymer of covalently-bonded polybutylene tere-phthalate units and poly(l,~-butylene oxide) units; and (d) from 0 to 15 percent by weight of a poly(ethy-lene-vinyl acetate) softening agent containing preferably no more than 35 percent by weight of vinyl acetate units.
The plastic composition o~ this invention can be heat sealed to polypropylene, polyethylene, and other true polyolefin materials. Also, it can be heat-sealed to modified polyolefin-type blends for making flexible, collapsible containers and other items as described above and as disclosed in U.S. Patent ~o. 4,140,162.
~n the o~hsr hand, as stated above, the connector and formulation ~f this invention adheres very well, by solvent sealing using methylisobutylketone or acetone for example, to polyvinyl chloride formulations so that the polyvinyl chloride component of a device, for example donor tubing, may be reliably and firmly sealed to a blood bag made of one of the above described polyolefin-type formulations. In the absence of the connector of this invention, polyvinyl chloride simply does not seal at all to most substantially polyolefin formulations.
The term "polyolefin" as used herein is intended to denote halogen-free materials which are polymerized by the basic vinylic polymerization reaction of ethylene or a substituted ethylene. It is con-templated that certain amounts of substituted ethylene materials may be present, such as styrene, acrylonitrile vinyl acetate, and the like, which cause the material to be not true poly-olefins. These are still contemplated to be within the scope of this invention as essentially polyolefin materials, since their polymerization still approximates the vinylic polymerization reaction of ethylene, and related olefins such as propylene and butadiene.
Basically, the formulation of this invention differs from the formulation of the previously cited patent appli-cation in that the polypropylene ingredient (a) is reduced ~ 42~i~
in quantityi Surprisingly, this turns out to greatly improve the capability of the formulation to be solvent bonded to polyvinyl chloride, while still providing excellent heat seal adhesion to many polyolefin-type 5 formulations such as those described above. However, the presence of at least l percent and preferably 1.5 to 6 percent of polypropylene, or a material consisting essen-tiall~ ~f polypropylene units with only minor amounts of added ~nits such as ethylene, is desirable for improved lO heat sealing to many of the polyolefin-type materials.
Ingredient (b), the block copolymer of styrene and the rubbery olefin, preferably is a block copolymer of poly-styrene with poly(ethylene-butylene), with the ethylene and butylene being in approximately equal quantities.
15 Such materials are sold by the Shell Chemical Company under trademark Kraton G. Alternatively, similar materials sold by the Shell Chemical Company include block copolymers of styrene and polybutadiene.
Ingredient (c) of the plastic composition of this 20 invention may be a flexible block copolymer of covalently bonded polybutylene terephthalate and poly(l,4-butylene) oxide units. Preferably the butylene oxide (polyether) blocks comprise from 50 to 70 percent by weight of the flexible block copolymer composition, for example 60 per-25 cent. A type of block copolymer is available from E. I.DuPont deNemours & Company under the trade n ~ HYTREL.
The specific material sold under the trade~ ~ e HYTREL
4056 is preferred for use herein. Preferably, the flexible block copolymer of ingredient (c) may exhibit a 30 melt flow rate of no less than 15 and typically 18 grams per lO minutes at 220 C. as described in the test of ASTM
Dl238. Of course, the material of ingredient (c) should have sufficient molecular weight to be a solid thermo-plastic material of satisfactory structural integrity.
, ~? ,.1! a~ ~9 ~9 A ~
Ingredient (d), the poly(ethylene-vinyl acetate), may also be added as desired to lubricate the flow o~ the material of the connector of this invention during heat seal. Also, it may be a lower cost material than ingre-5 dient (c), which it may partially, but not completely,replace in accordance with this invention.
Frequently, the blended material made from ingredients (a) ~hF~U~h ~d) is white, rather than being translucent or transparent, implying a certain amount of phase incompa-10 tibility. Nevertheless, highly satisfactory connectorparts may be made from the material, and its tensile and other physical properties and softening temperature may be sufficient for autoclaving and other normal handling of disposable medical devices with which it may be used.
Pellets of the ingredients of the plastic composition of this invention may be ~imply mixed together in their pr~per ratio and poured into an injection molding machine. The molding screw takes care of the final mixing in the melted state, so that the formulation of the 20 material can take place simultaneously with the molding process.
The polyolefin ingredient (a) is substantially poly-propylene, but may contain for example from 2 to 5 percent by weight of ethylene units or the like. A small amount 25 of at least about 1.5 percent by weight of the polyolefin ingredient (a) is preferred to improve the heat sealing characteristics of the material, while the solvent bonding capability of the formulation to polyvinyl chloride begins to be reduced at concentrations of ingre!dient (a) above 6 30 percent, although it remains improved up through at least about 8 percent by weight of ingredient (a).
EXAMPLE I
A formulation of this invention was mixed in an injec-tion molding machine, containing ~a) 2 percent by weight
ESSENTIALLY POLYOLEFIN MATERIALS
Technical Field and Description o~ Prior ~rt In the copending U.S. Patent Application Serial No~
5 067,Q68r filed Augus~ 15, 1979, now U.S. Patent No.
4,327,726, by Peter C. Kwong and Dean G. Laurin, a connector member for dissimilar materials is disclosed.
Specifically, the connector member is made out of a plast~ ul~ion which is adherent both to polyvinyl 10 chloride and to cer~ain materials which are substantially of polyolefin nature. The connector may be heat sealed to the polyolefin-type material, while it is solvent-bonded to the polyvinyl chloride. Thus, for example, a blood bag made of a modified polyolefin-type material containing 15 polypropylene~ a block copolymer of polystyrene blocks and rubber polyolefin blocks, and poly(ethylene-vinyl acetate) may be bonded through such a connector to a polyvinyl chloride donor tube, where normally there is virtually no adhesion at all between those two materials.
Specifically, the material of the connector of the above-cited application i8 a mixture which comprises 65 percent o~ a blend of 20 parts by weight of a polypropylene-based material, 60 parts by weight of a polystyrene-poly(ethylene butylene) block copolymer, and 25 20 parts by weight of poly(ethylene-vinyl acetate); and 35 percent of a polyes~er type block copolymer.
However, while ~uch a material is solvent-bondable to polyvinyl chloride, it is not as strongly adherent to the polyvinyl chloride as might be desired in numerous circum-30 stances, since the bonded joint between the two materialscan be separated with a relatively low force.
In Hoh et al. U.S. Patent No. 3,832,314 a segmented copolyester adhesive and coating composition is disclosed %~
in ~hich a thermoplastic, segmented copolyester elastomer is mixed with a low molecular weight thermoplastic resin such as a styrene polymer, a chlorinated aliphatic hydro carbon wax or the like. Such a structure, however, is not 5 contemplated for the use of this invention, and does not include polystyrene-rubbery olefin block copolymer contem-plated for use in this invention.
In accordance with this invention, an improvement in the formulation disclosed in the above-cited patent appli-10 cation is provided, resulting in a plastic composition anda connector member made of such composition which is capable of simultaneous, stronger sealing to both poly-vinyl chloride plastics and essentially polyolefin plastics ranging from polypropylene to the modified 15 polyolefin plastic formulation described above containing the polypropylene, the polystyrene-rubbery polyolefin block copolymer, and the poly(ethylene-vinyl acetate).
Description of the Invention f ~, In accordance with~th~l~s invention, a plastic composi-20 tion i8 ~rovided which is capable of simultaneously seal-ing to both polyvinyl chloride plastics and essentially polyolefin plastics. The formulation comprises:
(a) from 1 to 8 percent by weight of a polyolefin consisting essentially of propylene units;
(b) from ~0 to 65 percent by weight of a block copolymer, having thermoplastic rubber characteristics, consisting essentially of blocks, preferably comprising 50 to 85 percent by weight of the polymer molecule, of a rub-bery olefin polymer, and blocks of polystyrene;
(c) from 35 to 55 percent by weight of a ~lexible block copolymer of covalently-bonded polybutylene tere-phthalate units and poly(l,~-butylene oxide) units; and (d) from 0 to 15 percent by weight of a poly(ethy-lene-vinyl acetate) softening agent containing preferably no more than 35 percent by weight of vinyl acetate units.
The plastic composition o~ this invention can be heat sealed to polypropylene, polyethylene, and other true polyolefin materials. Also, it can be heat-sealed to modified polyolefin-type blends for making flexible, collapsible containers and other items as described above and as disclosed in U.S. Patent ~o. 4,140,162.
~n the o~hsr hand, as stated above, the connector and formulation ~f this invention adheres very well, by solvent sealing using methylisobutylketone or acetone for example, to polyvinyl chloride formulations so that the polyvinyl chloride component of a device, for example donor tubing, may be reliably and firmly sealed to a blood bag made of one of the above described polyolefin-type formulations. In the absence of the connector of this invention, polyvinyl chloride simply does not seal at all to most substantially polyolefin formulations.
The term "polyolefin" as used herein is intended to denote halogen-free materials which are polymerized by the basic vinylic polymerization reaction of ethylene or a substituted ethylene. It is con-templated that certain amounts of substituted ethylene materials may be present, such as styrene, acrylonitrile vinyl acetate, and the like, which cause the material to be not true poly-olefins. These are still contemplated to be within the scope of this invention as essentially polyolefin materials, since their polymerization still approximates the vinylic polymerization reaction of ethylene, and related olefins such as propylene and butadiene.
Basically, the formulation of this invention differs from the formulation of the previously cited patent appli-cation in that the polypropylene ingredient (a) is reduced ~ 42~i~
in quantityi Surprisingly, this turns out to greatly improve the capability of the formulation to be solvent bonded to polyvinyl chloride, while still providing excellent heat seal adhesion to many polyolefin-type 5 formulations such as those described above. However, the presence of at least l percent and preferably 1.5 to 6 percent of polypropylene, or a material consisting essen-tiall~ ~f polypropylene units with only minor amounts of added ~nits such as ethylene, is desirable for improved lO heat sealing to many of the polyolefin-type materials.
Ingredient (b), the block copolymer of styrene and the rubbery olefin, preferably is a block copolymer of poly-styrene with poly(ethylene-butylene), with the ethylene and butylene being in approximately equal quantities.
15 Such materials are sold by the Shell Chemical Company under trademark Kraton G. Alternatively, similar materials sold by the Shell Chemical Company include block copolymers of styrene and polybutadiene.
Ingredient (c) of the plastic composition of this 20 invention may be a flexible block copolymer of covalently bonded polybutylene terephthalate and poly(l,4-butylene) oxide units. Preferably the butylene oxide (polyether) blocks comprise from 50 to 70 percent by weight of the flexible block copolymer composition, for example 60 per-25 cent. A type of block copolymer is available from E. I.DuPont deNemours & Company under the trade n ~ HYTREL.
The specific material sold under the trade~ ~ e HYTREL
4056 is preferred for use herein. Preferably, the flexible block copolymer of ingredient (c) may exhibit a 30 melt flow rate of no less than 15 and typically 18 grams per lO minutes at 220 C. as described in the test of ASTM
Dl238. Of course, the material of ingredient (c) should have sufficient molecular weight to be a solid thermo-plastic material of satisfactory structural integrity.
, ~? ,.1! a~ ~9 ~9 A ~
Ingredient (d), the poly(ethylene-vinyl acetate), may also be added as desired to lubricate the flow o~ the material of the connector of this invention during heat seal. Also, it may be a lower cost material than ingre-5 dient (c), which it may partially, but not completely,replace in accordance with this invention.
Frequently, the blended material made from ingredients (a) ~hF~U~h ~d) is white, rather than being translucent or transparent, implying a certain amount of phase incompa-10 tibility. Nevertheless, highly satisfactory connectorparts may be made from the material, and its tensile and other physical properties and softening temperature may be sufficient for autoclaving and other normal handling of disposable medical devices with which it may be used.
Pellets of the ingredients of the plastic composition of this invention may be ~imply mixed together in their pr~per ratio and poured into an injection molding machine. The molding screw takes care of the final mixing in the melted state, so that the formulation of the 20 material can take place simultaneously with the molding process.
The polyolefin ingredient (a) is substantially poly-propylene, but may contain for example from 2 to 5 percent by weight of ethylene units or the like. A small amount 25 of at least about 1.5 percent by weight of the polyolefin ingredient (a) is preferred to improve the heat sealing characteristics of the material, while the solvent bonding capability of the formulation to polyvinyl chloride begins to be reduced at concentrations of ingre!dient (a) above 6 30 percent, although it remains improved up through at least about 8 percent by weight of ingredient (a).
EXAMPLE I
A formulation of this invention was mixed in an injec-tion molding machine, containing ~a) 2 percent by weight
2~
of polypro,pylene having a minor amount of ethylene units;
(b) 50 percent by weight of Kraton G 1660 poly(styrene-ethylene butylene) block copolymer; (c) 38 percent of HY~REL 4056 polyester block copolymer; and (d) 10 percent 5 by weig~!t of poly(ethylene-vinyl acetate) containing about 28 percent of vinyl acetate units, Such a blended material may be extruded into strips, or formed into a connector in accordance with this invention.
As a specific demonstration of its bonding strength to 10 polyvinyl chloride, thin strips of the above formulation were solvent-bonded with cyclohexanone to a strip of a polyvinyl chloride formulation plasticized ~ith di-2-ethylhexylphthalate. The surfaces of both strips were wetted by cyclohexanone. The wetted sides were joined 15 together and held under pressure overnight for drying~
For testing, an unbonded end of each of the sample strips were clamped to the jaws of an Instron testing machine. The cross head speed of the test was 10 inches per minute; the chart speed 10 inches per minute; and the 20 full scale was 10 pounds. The force required to tear the two strips apart was 5.97 pounds per inch.
This exceeds by about 40-fold the comparable results obtained when the specifically-disclosed formulation of the previously cited patent application is similarly 25 tested, that material requiring approximately 0.14 poun~
per inch for separation from the same type of polyvinyl chloride strip.
EXAMPLE II
The following formulation was blended into a homo 30 geneous material: (a) 5 percent by weight of the same polypropylene formulation as in Example I; (b) 45 percent by weight of the poly(styrene-ethylene butylene) block copolymer of Example I; and (c) 50 percent by weight of the polyester type block copolymer of Example I. This formulation was formed into strips and tested by bonding to the same polyvinyl chloride formulation as in Example I. 5.05 pounds per inch were required to pull the two strips apart.
In the drawing, Figure 1 is a fragmentary, elevation view, taken partly in vertical section, of a blood bag of a gen~r~lly known design, made of an essentially poly-olefin blend, carrying the connector of this invention, which, in turn, is ~onnected to donor tubing made of a 10 polyvinyl chloride formulation.
~ eferring to the drawing, blood bag 10 is shown, which may be of conventional design. Blood bag 10 may be made of a polyolefin blend which may include 20 parts by weight of a polypropylene polymer having a melt flow of about 2, 15 with a small amount of copolymerized ethylene; 60 parts by weight of a block copolymer having thsrmoplastic rubber ch~racteristics, consisting of a central block of poly(ethylene-butylene) and terminal blocks of poly-styrene; and 20 parts by weight of a poly(ethylene-vinyl 20 acetate) copolymer.
Blood bag 10 as shown defines an access port 12 which in turn defines a terminal flange 14 whic~ is integrally formed in relatively thick section along with the thinner sections of the flexible walls of blood bag 10. Web 16 as 25 shown communicates between port 12 of ~he blood bag and an adjacent port (not shown). In accordance with ~his invention, connector member 18 is disc]osed, being prefer-ably an injection molded, single piece of the formula of this invention, comprising a tubular portion 20 and 30 terminating in a flange 22. Connector member 18 may be of the formulation de~cribed in Example I above.
Flange 22 of connector 18 may be conventionally heat sealed to flange 14 of the blood bag, using for example an ultrasonic sealing device or a spin welding device, so that a common ~ore 24 passes between connector 18 and port 12 of the blood bag.
Additionally, polyvinyl chloride donor tubing 26 may be solvent-sealed to the exterior of tubular portion 20 of 5 connector 18, using, for example, cyclohexanone or any other appropriate volatile solvent for both of the materials. Both flange 14 and tubing 26 adhere strongly to connector 18 with the result that great simplification of the bond between these dissimilar materials may be 10 obtained.
The above has been offered for illustrative purposes only, and is not intended to limit the invention of this application, which is as defined in the claims below.
of polypro,pylene having a minor amount of ethylene units;
(b) 50 percent by weight of Kraton G 1660 poly(styrene-ethylene butylene) block copolymer; (c) 38 percent of HY~REL 4056 polyester block copolymer; and (d) 10 percent 5 by weig~!t of poly(ethylene-vinyl acetate) containing about 28 percent of vinyl acetate units, Such a blended material may be extruded into strips, or formed into a connector in accordance with this invention.
As a specific demonstration of its bonding strength to 10 polyvinyl chloride, thin strips of the above formulation were solvent-bonded with cyclohexanone to a strip of a polyvinyl chloride formulation plasticized ~ith di-2-ethylhexylphthalate. The surfaces of both strips were wetted by cyclohexanone. The wetted sides were joined 15 together and held under pressure overnight for drying~
For testing, an unbonded end of each of the sample strips were clamped to the jaws of an Instron testing machine. The cross head speed of the test was 10 inches per minute; the chart speed 10 inches per minute; and the 20 full scale was 10 pounds. The force required to tear the two strips apart was 5.97 pounds per inch.
This exceeds by about 40-fold the comparable results obtained when the specifically-disclosed formulation of the previously cited patent application is similarly 25 tested, that material requiring approximately 0.14 poun~
per inch for separation from the same type of polyvinyl chloride strip.
EXAMPLE II
The following formulation was blended into a homo 30 geneous material: (a) 5 percent by weight of the same polypropylene formulation as in Example I; (b) 45 percent by weight of the poly(styrene-ethylene butylene) block copolymer of Example I; and (c) 50 percent by weight of the polyester type block copolymer of Example I. This formulation was formed into strips and tested by bonding to the same polyvinyl chloride formulation as in Example I. 5.05 pounds per inch were required to pull the two strips apart.
In the drawing, Figure 1 is a fragmentary, elevation view, taken partly in vertical section, of a blood bag of a gen~r~lly known design, made of an essentially poly-olefin blend, carrying the connector of this invention, which, in turn, is ~onnected to donor tubing made of a 10 polyvinyl chloride formulation.
~ eferring to the drawing, blood bag 10 is shown, which may be of conventional design. Blood bag 10 may be made of a polyolefin blend which may include 20 parts by weight of a polypropylene polymer having a melt flow of about 2, 15 with a small amount of copolymerized ethylene; 60 parts by weight of a block copolymer having thsrmoplastic rubber ch~racteristics, consisting of a central block of poly(ethylene-butylene) and terminal blocks of poly-styrene; and 20 parts by weight of a poly(ethylene-vinyl 20 acetate) copolymer.
Blood bag 10 as shown defines an access port 12 which in turn defines a terminal flange 14 whic~ is integrally formed in relatively thick section along with the thinner sections of the flexible walls of blood bag 10. Web 16 as 25 shown communicates between port 12 of ~he blood bag and an adjacent port (not shown). In accordance with ~his invention, connector member 18 is disc]osed, being prefer-ably an injection molded, single piece of the formula of this invention, comprising a tubular portion 20 and 30 terminating in a flange 22. Connector member 18 may be of the formulation de~cribed in Example I above.
Flange 22 of connector 18 may be conventionally heat sealed to flange 14 of the blood bag, using for example an ultrasonic sealing device or a spin welding device, so that a common ~ore 24 passes between connector 18 and port 12 of the blood bag.
Additionally, polyvinyl chloride donor tubing 26 may be solvent-sealed to the exterior of tubular portion 20 of 5 connector 18, using, for example, cyclohexanone or any other appropriate volatile solvent for both of the materials. Both flange 14 and tubing 26 adhere strongly to connector 18 with the result that great simplification of the bond between these dissimilar materials may be 10 obtained.
The above has been offered for illustrative purposes only, and is not intended to limit the invention of this application, which is as defined in the claims below.
Claims (13)
1. A plastic composition which is capable of simul-taneously sealing to both polyvinyl chloride plastics and essentially polyolefin plastics, which comprises:
(a) from 1 to 8 percent by weight of a polyolefin consisting essentially of propylene units;
(b) from 40 to 65 percent by weight of a block copoly-mer, having thermoplastic rubber characteristics, consis-ting essentially of blocks of rubbery olefin polymer and blocks of polystyrene;
(c) from 35 to 55 percent by weight of a flexible block copolymer of covalently bonded polybutylene tere-phthalate units and poly(1,4-butylene oxide) units; and (d) from 0 to 15 percent by weight of poly(ethylene-vinyl acetate.
(a) from 1 to 8 percent by weight of a polyolefin consisting essentially of propylene units;
(b) from 40 to 65 percent by weight of a block copoly-mer, having thermoplastic rubber characteristics, consis-ting essentially of blocks of rubbery olefin polymer and blocks of polystyrene;
(c) from 35 to 55 percent by weight of a flexible block copolymer of covalently bonded polybutylene tere-phthalate units and poly(1,4-butylene oxide) units; and (d) from 0 to 15 percent by weight of poly(ethylene-vinyl acetate.
2. The composition of Claim 1 in which from 1.5 to 6 percent by weight of said polyolefin consisting essentially of propylene units is present.
3. The composition of Claim 1 in which said composi-tion contains essentially 2 percent of ingredient (a); 50 percent of ingredient (b): 38 percent of ingredient (c);
and 10 percent of ingredient (d).
and 10 percent of ingredient (d).
4. The composition of Claim 1 in which the rubbery olefin polymer is poly(ethylene-butylene).
5. The plastic composition of Claim 1 in which said block copolymer of ingredient (c) contains from 50 to 70 percent by weight of said poly(1,4-butylene oxide) blocks.
6. A plastic composition which is capable of simul-taneously sealing to both polyvinyl chloride plastics and essentially polyolefin plastics, which comprises:
(a) 1.5 to 6 percent by weight of a polyolefin consisting essentially of propylene units;
(b) from 45 to 55 percent of a block copolymer having thermoplastic rubber characteristics, consisting essen-tially of (1) a central block of poly(ethylene-butylene) comprising 50 to 85 percent by weight of the polymer and having rubbery characteristics and (2) terminal blocks of polystyrene;
(c) from 40 to 55 percent by weight of a flexible block copolymer of covalently bonded polybutylene tere-phthalate units and poly(1,4-butylene oxide) units; and (d) from 5 to 15 percent of poly(ethylene-vinyl acetate) containing no more than 35 percent by weight of vinyl acetate units.
(a) 1.5 to 6 percent by weight of a polyolefin consisting essentially of propylene units;
(b) from 45 to 55 percent of a block copolymer having thermoplastic rubber characteristics, consisting essen-tially of (1) a central block of poly(ethylene-butylene) comprising 50 to 85 percent by weight of the polymer and having rubbery characteristics and (2) terminal blocks of polystyrene;
(c) from 40 to 55 percent by weight of a flexible block copolymer of covalently bonded polybutylene tere-phthalate units and poly(1,4-butylene oxide) units; and (d) from 5 to 15 percent of poly(ethylene-vinyl acetate) containing no more than 35 percent by weight of vinyl acetate units.
7. The plastic composition of Claim 6 in which said block copolymer of ingredient (c) contains from 50 to 70 percent by weight of said poly(1,4-butylene oxide) blocks.
8. A connector which is capable of simultaneously sealing to both polyvinyl chloride plastics and essen-tially polyolefin plastics, said connector being made of a material which comprises:
(a) from 1 to 8 percent by weight of a polyolefin consisting essentially of propylene units;
(b) from 40 to 65 percent by weight of a block copolymer, having thermoplastic rubber characteristics, consisting essentially of (1) a central block comprising 50 to 85 percent by weight of a rubbery olefin polymer and (2) terminal blocks of polystyrene;
(c) from 35 to 55 percent by weight of a flexible block copolymer of covalently bonded polybutylene tere-phthalate units and poly(1,4-butylene oxide) units; and (d) from 0 to 15 percent by weight of poly(ethylene-vinyl acetate).
(a) from 1 to 8 percent by weight of a polyolefin consisting essentially of propylene units;
(b) from 40 to 65 percent by weight of a block copolymer, having thermoplastic rubber characteristics, consisting essentially of (1) a central block comprising 50 to 85 percent by weight of a rubbery olefin polymer and (2) terminal blocks of polystyrene;
(c) from 35 to 55 percent by weight of a flexible block copolymer of covalently bonded polybutylene tere-phthalate units and poly(1,4-butylene oxide) units; and (d) from 0 to 15 percent by weight of poly(ethylene-vinyl acetate).
9. The connector of Claim 8 in which from 1.5 to 6 percent by weight of said polyolefin consisting essen-tially of propylene units is present.
10. The connector of Claim 9 in which said composi-tion contains essentially 2 percent of ingredient (a); 50 percent of ingredient (b); 38 percent of ingredient (c) and 10 percent of ingredient (d).
11. The connector of Claim 9 in which the rubbery olefin polymer is poly(ethylene-butylene).
12. The plastic composition of Claim 1 in which said block copolymer of ingredient (c) contains from 50 to 60 percent by weight of said poly(1,4-butylene oxide) blocks.
13. The connector of Claim 8 in which from 2 to 5 percent of ingredient (a), from 45 to 55 percent of ingredient (b), from 45 to 55 percent of ingredient (c), and from 5 to 15 percent of ingredient (d) are present, and said poly(ethylene-vinyl acetate) contains no more than 35 percent by weight of vinyl acetate units.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US29380681A | 1981-08-17 | 1981-08-17 | |
| US293,806 | 1981-08-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1194246A true CA1194246A (en) | 1985-09-24 |
Family
ID=23130659
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000408915A Expired CA1194246A (en) | 1981-08-17 | 1982-08-06 | Plastic composition including propylene polymer, block copolymer of olefin and styrene segments and block copolymer of butyleneterephthalate and 1,4 butylene oxide segments |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0085703A1 (en) |
| CA (1) | CA1194246A (en) |
| WO (1) | WO1983000699A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3466240D1 (en) * | 1983-11-26 | 1987-10-22 | Sumitomo Chemical Co | Adhesive resin composition |
| EP3246052A1 (en) * | 2016-05-20 | 2017-11-22 | Fresenius Medical Care | Tube connection |
| EP3246053A1 (en) * | 2016-05-20 | 2017-11-22 | Fresenius Medical Care Deutschland GmbH | Flexible tube |
| EP3421062A3 (en) * | 2017-06-30 | 2019-03-06 | Fenwal, Inc. | Fluid circuit having reduced plasticizer migration |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3865776A (en) * | 1974-02-11 | 1975-02-11 | Shell Oil Co | Kink-resistant polymeric tubing |
| US4081424A (en) * | 1976-06-07 | 1978-03-28 | Shell Oil Company | Multicomponent polyolefin - block copolymer - polymer blends |
| US4011286A (en) * | 1976-07-16 | 1977-03-08 | Eastman Kodak Company | Polyetherester-radial teleblock copolymer blend molding composition |
| US4327726A (en) * | 1979-08-15 | 1982-05-04 | Baxter Travenol Laboratories, Inc. | Connector member for dissimilar materials |
-
1982
- 1982-07-28 EP EP82902657A patent/EP0085703A1/en not_active Withdrawn
- 1982-07-28 WO PCT/US1982/001028 patent/WO1983000699A1/en unknown
- 1982-08-06 CA CA000408915A patent/CA1194246A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| EP0085703A1 (en) | 1983-08-17 |
| WO1983000699A1 (en) | 1983-03-03 |
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| Date | Code | Title | Description |
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| MKEX | Expiry |