CN1189842A - Process for coestruding a tacky amorphous propylene copolymer compsn. with a low viscosity polyolefin and article prepared thereby - Google Patents
Process for coestruding a tacky amorphous propylene copolymer compsn. with a low viscosity polyolefin and article prepared thereby Download PDFInfo
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- CN1189842A CN1189842A CN96195178A CN96195178A CN1189842A CN 1189842 A CN1189842 A CN 1189842A CN 96195178 A CN96195178 A CN 96195178A CN 96195178 A CN96195178 A CN 96195178A CN 1189842 A CN1189842 A CN 1189842A
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Abstract
Disclosed is a process for producing non-blocking slats of normally tacky amorphous propylene copolymers. The process entails coextruding the normally tacky amorphous propylene copolymer with a low viscosity polyolefin such as a polyethylene wax forming a core of amorphous propylene copolymer covered with a sheath of polyethylene wax. The coextruded article is cooled, cut (while exposing less than 40 percent of the core) and then coated with a non-tacky powder; thereby, forming non-blocking slats. Disclosed is also a novel amorphous propylene copolymer composition containing no more than 90 weight percent propylene and up to 70 weight percent of an alpha olefin comonomer having a needle penetration greater than 70 to less than 100 dmm at 23 DEG C. and a Brookfield Thermosel Viscosity below 1000 cP at 190 DEG C.
Description
Invention field
The present invention relates to a kind of method for preparing common viscosity amorphous propene copolymer artcle.The invention still further relates to new amorphous propene copolymer compositions.The goods of non-caking common viscosity amorphous polypropylene composition when the invention further relates to packing.
Background of invention
Amorphous polyolefin is known and is suitable for very much in tackiness agent, roofing composition, cable bits (cable filing), cable film color (cable flooding), spackling and the sealing agent.With multiple multi-form transportation or shipment, add then in the final composition after the amorphous polyolefin production.That amorphous polyolefin at room temperature is generally viscosity and have low-crystallinity, therefore be not easy to make powder or the pellet that is fit to transportation.Amorphous polyolefin usually in large container with molten state or the fritter in scribbling the paper container of releasing agent, packed and big block form and the flakes form transportation that scribbles non-stick substance of in bellows-shape container, packing in some cases.
The preferred form of transportation amorphous polyolefin is body fusion (bulk molten) form.Because tooling cost is low, so body fusion form is preferred.Yet body fusion form is contained in large container such as the tank car, the ability that therefore a lot of end users do not have unloading or store these a large amount of fusion amorphous polyolefins.Yet, use solid mass form transportation amorphous polyolefin labor capacity very big, need the end user before blend, to remove the paper of coating.Paper often sticks on the APO, is difficult to remove and produce solid waste.Bigger solid form, promptly 50 pounds of packings generally are better than 20 pounds of packings, because reduced the time of removing the packing material cost from piece on every side for the amorphous polyolefin of each specified rate.Because the difficulty that runs into when using fusion or block form, therefore a lot of end users like packing the amorphous polyolefin of economic and easy-to-use solid form.
The compounder of amorphous polyolefin or end user favor maneuverable solid amorphous polyolefine.The amorphous polyolefin pellet is only, yet its preparation is difficulty very, can't buy on market.Therefore, in the form that can buy, the normally most preferred and the most maneuverable form of amorphous polyolefin small pieces.Yet, found some amorphous polyolefin even can not make small pieces.
Find that polymer blend such as some amorphous polypropylene multipolymer of some itself " soft and be clamminess " are very difficult to be processed into spendable small pieces form.These materials must be with very unsuitable form production and sale.
EASTOFLEX E1003 available from Eastman chemical company (Eastman Chemical Company) is exactly a kind of of this amorphous propene/ethylene copolymer, because it is a kind of low viscosity (being lower than 1000cP in the time of 190 ℃) amorphous propene multipolymer with suitable high comonomer (ethene) content.These features make this material very soft and be pressure-sensitive.This material is so soft, to such an extent as to do not think that when room temperature (23 ℃) it is a kind of " solid ".Combine with its viscosity, this makes this polymkeric substance be difficult to except melt liquid by any formal operations.Therefore, need a kind of other method of operating these materials such as E1003.
As mentioned above, the general method of operation amorphous polyolefin or hot-melt adhesive is that molten materials is poured in the container that scribbles siloxane release agent, makes the block form.Be very easy to material such as E1003 are inserted in this carton, but taking-up is then not too easy from this container.E1003 can not be from the demoulding on the paper that scribbles siloxane release agent under common envrionment conditions.This polymkeric substance has low-down cohesive strength, therefore compares easier with itself and the release paper bonding.The low cohesive strength of this polymkeric substance is by its low tensile strength (being lower than 150kPa) expression.Another index of APO tensile strength is its penetration value.Penetration value is high more, and polymkeric substance is soft more and intensity is low more.The penetration value that E1003 has in the time of 23 ℃ is greater than 95dmm.
Attempting to use another problem with this packaging substance such as E1003 is to divide when opening scribbling the container of releasing agent and E1003 when managing, and needs physics to grasp this material.Because E1003 is not solid under common envrionment conditions, therefore people can not draw off it by grasping this material from carton.This material glues hand, sticks between the finger, and still can not separate from the container that scribbles releasing agent.A kind of method of head it off is to take out preceding product is chilled to of material from container to make its hardening (sclerosis) below 0 ℃.This method is very good, but for storage quantity very many material such as E1003 need a large amount of refrigerants, and because the finished product use under molten state, therefore before just will melting this product, but this product is cooled off, not only lose time but also waste energy.
Packaging group is to be poured in the fibre drum that is lined with releasing agent like the method for the material of E1003 at present.This bucket is designed to use with " unloading a barrel machine ", wherein hot-plate is inserted in the bucket and with material and extracts out with melt form.Yet most of end users do not have this device, because its expense height.Therefore, most of end users cut bucket as possible and E1003 are prized.This method is difficulty very, and labor capacity is very big and dirty.
Another ordinary method of processing amorphous polyolefin and hotmelt is, extrudes this material, with its quenching, cuts or be whittled into final physical form (small pieces) then.Yet, some amorphous polyolefin such as E1003, extrude, cutting or difficult cutting, because they melt extrude with quenching after too soft and be clamminess, therefore can not with its well charging give under cutting facility (being out of shape under the pressure of take-up gear) or their shear pressures in cutting machine or cutting machine and be out of shape, and gluing or cover blade.Most of amorphous polyolefin is very easy to form small pieces (term that is used for amorphous polyolefin and the coextrusion of non-sticky polyolefine material).Usually, the butylene alfon that penetration value is lower than 40dmm during with 23 ℃ with hexene copolymer is compared with ethylene copolymer with lower speed and is formed small pieces.
In sum, be starved of and produce easy to use and do not need the low viscosity of the solid form that the labor force opens, low tensile strength, viscosity amorphous propene multipolymer.
Summary of the invention
The inventive method comprises:
(a) near the extrusion neck ring mold surface, be close to or higher than ring and ball softening point, a kind of amorphous propene copolymer compositions is provided, said composition comprises the propylene that is no more than about 90wt% and the alpha-olefin comonomer with 2 to 8 carbon atoms of 70wt% at the most, wherein the penetration value of composition in the time of 23 ℃ greater than 70 to less than 100dmm, Brookfield Thermosel viscosity in the time of 190 ℃ is lower than 1,000cP;
(b) with above-mentioned amorphous propene copolymer compositions with the coextrusion of low viscosity non-sticky polyolefine shell, described polyolefine is 100 to 50 150 ℃ Brookfield Thermosel viscosity, 000cP, penetration value in the time of 23 ℃ is lower than 20dmm, and the concentration of wherein said shell counts about 1 to 20wt% by the overall weight percent of non-sticky polyolefine and amorphous propene multipolymer;
(c) the amorphous propene multipolymer of coextrusion and non-sticky polyolefine shell are lower than in temperature on the surface of ring and ball softening point of amorphous propene multipolymer and contact;
(d) cut into small pieces under the amorphous propene multipolymer and the non-sticky polyolefine shell of coextrusion is lower than the amorphous propene multipolymer in temperature the ring and ball softening point, wherein the surface-area that exposes because of cutting be lower than whole die surfaces long-pending 40%, the surface-area of these small pieces under low-viscosity polyolefin coats is greater than 60% like this; With
(e) cut small pieces with the non-sticky powder by 1 to the 20wt% coating that concentration is about cutting small pieces total amount.
The composition that the present invention can form small pieces comprises the propylene that is not more than about 90wt% and the alpha-olefin comonomer with 2 to 8 carbon atoms of 70wt% at the most, wherein the penetration value of composition in the time of 23 ℃ greater than 70 to less than 100dmm, Brookfield Thermosel viscosity in the time of 190 ℃ is lower than 1,000cP.
The invention further relates to inviscid goods of anti-the caking, they comprise the cutting small pieces that contain amorphous propene copolymer compositions nuclear, described composition nuclear has the propylene that is no more than about 90wt% and the alpha-olefin comonomer with 2 to 8 carbon atoms of 70wt% at the most, the penetration value of wherein said composition in the time of 23 ℃ greater than 70 to less than 100dmm, Brookfield Thermosel viscosity in the time of 190 ℃ is lower than 1,000cP; Described nuclear during by 150 ℃ BrookfieldThermosel viscosity be 100 to 50, the low viscosity non-sticky polyolefine shell of 000cP coats the surface-area that surpasses at least 60% described nuclear; Carry out powder coated with described cutting small pieces with about 1 to 20wt% non-sticky powder.
Brief description of the drawings
Fig. 1 will scribble extrudate cooling, cutting, the coated powder then of the common viscosity amorphous propene multipolymer nuclear of low viscosity non-sticky polyolefine shell for forming the method synoptic diagram of small pieces.
The detailed description of invention
The applicant unexpectedly finds will have amorphous third of a series of properties Alkene copolymer is made small pieces. Before the present invention, and do not know that penetration value is greater than 70 can be with 23 ℃ the time Brookfield Thermosel viscosity is lower than 1,000cP's to less than 100dmm and 190 ℃ the time Low cohesive strength viscosity amorphous propene copolymer is made small pieces. The applicant also unexpectedly sends out Existing, viscosity amorphous propene copolymer can be in these performance ranges by blend preparation and can Make small pieces.
The amorphous propene copolymer compositions can contain 2 to 8 carbon atoms that have of 70wt% at the most Alpha olefin copolymer, preferred alpha olefin copolymer is ethene and hexene. When hexene is that copolymerization is single During body, the concentration that usually can be higher than ethene exists, and can be 20 to 70wt% monomer concentration, And generally still fall in the physical property scope of amorphous propene copolymer compositions. When the copolymerization list When body is ethene, it typically is about comonomer concentration of 10 to 30wt%.
The penetration value of amorphous propene copolymer compositions in the time of 23 ℃ greater than 70 to less than 100 Dmm. This penetration value is preferably greater than 70 to 95dmm in the time of 23 ℃, and more preferably 75 to 95 Dmm. Penetration value in these scopes is normally preferred, has because unexpectedly find The composition of this penetration value can form small pieces and (be coextrusion, cuts and be coated with powder, form thus The small pieces that can pack).
Amorphous propene copolymer compositions of the present invention is at 190 ℃ Brookfield Thermosel viscosity is lower than 1000cP, preferably is lower than 800cP. Amorphous propene copolymer group Compound is usually less than 1000cP 190 ℃ Brookfield Thermosel viscosity, and reason is More low viscous polymer is compared with more full-bodied homologue, and is usually more soft and more tacky, therefore Be more suitable for raw material and viscosity additives as adhesive and sealant.
It is fixed that the amorphous propene copolymer compositions can be one-component or can be at least two kinds of different nothings The multicomponent blend of shape propylene copolymer, wherein the gained blend contains and is no more than about 90wt% Propylene and the comonomer of the alpha-olefin that is selected from 2 to 8 carbon atoms of 70wt% at the most, its In the penetration value of a kind of amorphous propene copolymer in the time of 23 ℃ be lower than 70dmm, another kind of do not have fixed The penetration value of shape propylene copolymer should be enough high, makes the penetration value of gained blend in the time of 23 ℃ be 70 to 100dmm.
When amorphous propene copolymer compositions of the present invention is blend, a kind of amorphous propene Copolymer be preferably hot strength be lower than 150kPa, 23 ℃ the time penetration value greater than 95dmm and Viscosity is lower than the low hot strength copolymer of 1000cP in the time of 190 ℃. Another kind of amorphous propene altogether The polymers composition be hot strength greater than 150kPa, 23 ℃ the time penetration value less than 70dmm and Viscosity is greater than the more high tensile copolymer of 1000cP in the time of 190 ℃. Preferably, the low stretching Intensity amorphous propene copolymer concentration is about 60 to 95wt%, and more high tensile is amorphous The concentration of propylene copolymer is about 5 to 40wt%.
The amorphous propene copolymer compositions is to coat the kernel form of low viscosity non-sticky polyolefin shell Coextrusion, the described polyolefin Brookfield Thermosel viscosity in the time of 150 ℃ be 100 to 50,000cP, the penetration value in the time of 23 ℃ is lower than 20dmm. This shell is about with concentration usually 1 to 20wt% of nuclear and shell total amount coats nuclear. Low viscosity non-sticky polyolefin is preferably polyethylene Wax, and preferably the Brookfield Thermosel viscosity in the time of 150 ℃ is 3000 to 5000 CP. The polyolefinic concentration of this low viscosity non-sticky is preferably about 2 to 10wt%.
Amorphous propene copolymer compositions nuclear and low viscosity non-sticky polyolefin shell with coextrusion Co-extrusion is lower than for temperature on the surface of amorphous propene copolymer ring and ball softening point, is being lower than then Cut into small pieces under the ring and ball softening point of amorphous propene copolymer, the surface that wherein exposes because of cutting Long-pending be lower than whole die surfaces long-pending 40%, these small pieces are under low-viscosity polyolefin covers like this Surface area is greater than 60%. The surface area that exposes preferably is lower than 30% of cutting small pieces total surface area, More preferably less than 20%, exposed surface area is most preferably for 10% of cutting small pieces total surface area . The exposed surface area of amorphous propene copolymer nuclear should be lower than 40% of total surface area usually, Reason is exposed surface area when being higher than this value, and providing too many will fully be coated with the non-sticky powder Not covering surfaces long-pending, to such an extent as to can not prevent gained small pieces caking during packing. When the nothing that exposes is decided When shape propylene copolymer surface area is lower than 40%, the side of exposure unlikely and another do not cover The exposed side of low-viscosity polyolefin shell obviously contacts.
Be applied to the non-sticky powder of cutting on the small pieces and can be any non-sticky powder, but preferred polyolefm wax, more preferably polyethylene wax is as long as this powder is compatible with the amorphous propene multipolymer.This powder can be and form the powder type of low viscosity non-sticky polyolefine shell same material.When the non-sticky powder was powdery polyolefin wax, its Brookfield Thermosel viscosity in the time of 150 ℃ was 100 to 50,000cP.
Goods prepared in accordance with the present invention comprise the cutting small pieces that contain amorphous propene copolymer compositions nuclear, described composition nuclear comprises the propylene that is no more than about 90wt% and the alpha-olefin comonomer with 2 to 8 carbon atoms of 70wt% at the most, the penetration value of wherein said composition in the time of 23 ℃ greater than 70 to less than 100dmm, Brookfield Thermosel viscosity in the time of 190 ℃ is lower than 1,000cP; Described nuclear is Brookfield Thermosel viscosity 100 to 50 during by 150 ℃, and the low viscosity non-sticky polyolefine shell that penetration value is lower than 20dmm when 000cP and 23 ℃ coats, and coats at least 60% of described nuclear total surface area; Be coated with about 1 to 20wt% non-sticky powder with described cutting small pieces.
Goods prepared in accordance with the present invention are preferably thick about 1mm to 2cm, are about 1cm to 20cm and wide about 1cm to 10cm, and wherein thickness is lower than the flat small pieces of length and width.The more preferably thick about 1mm to 1cm of goods of preparation, be about 1cm to 10cm and wide about 1cm to 5cm cuts small pieces.
Can expect that any conventional extrusion method all can be used in the inventive method.Mouth mold hole dimension, extruded velocity etc. are considered to unimportant to the present invention.Yet, nib should be enough little and extruded velocity should be enough low, with temperature production solid tablets or line material (strand) in conjunction with plastic substance and cooling fluid.
After in cooling fluid, forming the line material, preferably all cooling fluids are separated with small pieces.When liquid is cooling fluid, need drying step usually.
After the cutting, that small pieces are powder coated with non-sticky.This non-stick substance should be compatible with the amorphous propene multipolymer.The so-called compatible non-stick substance that is meant with amorphous propene multipolymer and usefulness is when being in molten state and in final the use, not obvious processing conditions or the quality product of influencing.Non-stick substance such as W-Gum are incompatible with these plastic substances, because they are tending towards charing and make the plastic substance blackening, are inappropriate therefore.The example of suitable non-stick substance comprises powder, siloxanes and tensio-active agent.Preferred non-stick substance is a powder, as powdery polyolefin.Preferred powder is a powdery polyolefin wax, and the example of suitable powdery polyolefin wax comprises powdery polyethylene wax, Powdered Poly Propylene Wax and Powdered Fischer-Tropsch wax.Most preferred non-stick substance is a powdery polyolefin wax, as the polyethylene wax of about 1 to the 600 μ m of particle size.
After small pieces were separated from cooling fluid, the amount of the non-stick substance that contacts with these small pieces should be the amount that is enough to fully be coated with small pieces.In this contact procedure, can use excessive non-stick substance, from excessive non-stick substance as long as small pieces can be separated.
Fig. 1 is for preparing the method synoptic diagram of small pieces, and this method relates to coextrusion, coats common viscosity amorphous propene multipolymer with low viscosity non-sticky polyolefine.With fusion amorphous propene multipolymer by positive displacement gear pump (not shown) from heating tank in the suction pipeline 14, then or by heat exchanger cooling polymer or directly join in the co-extrusion outlet mould 18 at first by pipeline 16.The amorphous propene multipolymer is extruded being close to or higher than under its ring and ball softening point condition.Low viscosity non-sticky or non-tackiness polyolefin coatings or shell added the hot tank 10 from another with positive displacement gear pump be higher than in the co-extrusion outlet mould 18 of its ring and ball softening point by pipeline 12 suction temperature.Low viscosity non-sticky polyolefine material extruded around amorphous propene multipolymer nuclear form line material 19, this line material 19 contacts on cooling roller 20 and 22 chilled surface.24 contacts of co-extrusion outlet material can contain or not contain the cooling fluid 26 (being generally water) of additive.Cutting unit 32 is carried and entered to line material 24 by take-up gear 30 then by cooling fluid 26 transmission below 28 on the surface.After this material is cut, small pieces 36 usefulness non-sticky powder are applied on the surface 34 so that the uncoated cut end that exposes is eliminated viscosity also by pipeline 38 dischargings.With cooling fluid recirculation and by pipeline 40 coolings.
The following examples are used to illustrate the present invention, rather than limit zone of reasonableness of the present invention.
Embodiment
By E1003 and two kinds of propylene/ethylene copolymer of E1060 (available from Eastman ChemicalCompany) preparation blend.E1003 contains have an appointment 80% propylene and 20% ethene, and its tensile strength is lower than 100kPa, and the penetration value in the time of 23 ℃ is about 100dmm, and the Brookfield Thermosel viscosity in the time of 190 ℃ is about 300cP, and ring and ball softening point (RBSP) is about 120 ℃.E1060 contains have an appointment 88% propylene and 12% ethene, and its tensile strength is about 350kPa, and the penetration value in the time of 23 ℃ is about 40dmm, and the BrookfieldThermosel viscosity in the time of 190 ℃ is about 6, and 000cP, RBSP are about 135 ℃.With each blend in Cowles dissolver (Cowles Dissolver) homogenizing and making small pieces before be heated to required temperature of fusion.EPOLENE C-15 polyethylene wax is used as non-sticky coating, this EPOLENEC-15 is available from Eastman chemical company (Eastman Chemical Company), its Brookfield Thermosel viscosity in the time of 150 ℃ is about 4,000cP, RBSP is about 102 ℃, and the penetration value in the time of 23 ℃ is about 4dmm (also containing oxidation inhibitor).EPOLENE C-15 powder is used at small pieces cutting machine place coating small pieces.Before packing, from small pieces, remove excessive powder.All small pieces are packaged in the small pieces tr of 22.7kg.Aim parameter as EPOLENE C-15 small pieces coating is 4-5wt%.Target chip size is long 4.45cm, wide 3.18cm.The thickness of small pieces is functions of the melt extrusion viscosity of each blend.Embodiment 1
This experiment begins by the blend of 50%E1003 and 50%E1060 is made small pieces.This mixture is made small pieces with the speed of 529g/min.Two kinds of trials then are to use 65% and 75% E1003 respectively.The blend that contains 65%E1003 is made small pieces with the speed of 454g/min, and the blend that contains 75%E1003 is made small pieces with the speed of 529g/min.This explanation contains 50% to 75%E1003 E1003 and the blend of E1060 can be made small pieces with speed much at one.Amazing and beyond thought is that the blend of 75%E1003 and 25%E1060 can be made small pieces equally well.Embodiment 2
Trial is made small pieces with 100%E1003.Rated speed that can 378g/min prepares several small pieces, but before the distortion of small pieces line material and gluing outlet roller and cutting machine, to the multipotency few minutes of operation.The 2kgE1003 small pieces can be collected, but 100% E1003 small pieces line material can not be cut continuously.Must close the small pieces pipeline, and from outlet roller and cutting machine blade, remove gluing E1003 with several minutes.Carry out twice above trial for preparing small pieces with 100%E1003, but not success.Embodiment 3
Below two tests with containing 85% and the blend of 90%E1003.These two kinds of blends are all made small pieces with the speed of 454g/min.Very amazing and beyond thought is that the blend of 90%E1003 and 10%E1060 can be made small pieces without difficulty.Seem almost too soft and can not make small pieces to such an extent as to contain the blend of 90%E1003, but prepare small pieces continuously almost without a doubt.
Claims (20)
1. method of producing the small pieces that do not lump of amorphous propene multipolymer, this method comprises:
(a) near the extrusion neck ring mold surface, be close to or higher than ring and ball softening point, a kind of amorphous propene copolymer compositions is provided, said composition comprises the propylene that is no more than about 90wt% and the alpha-olefin comonomer with 2 to 8 carbon atoms of 70wt% at the most, wherein the penetration value of composition in the time of 23 ℃ greater than 70 to less than 100dmm, Brookfield Thermosel viscosity in the time of 190 ℃ is lower than 1,000cP;
(b) with above-mentioned amorphous propene copolymer compositions with the coextrusion of low viscosity non-sticky polyolefine shell, described polyolefine is 100 to 50 150 ℃ Brookfield Thermosel viscosity, 000cP, penetration value in the time of 23 ℃ is lower than 20dmm, and the concentration of wherein said shell counts about 1 to 20wt% by the overall weight percent of non-sticky polyolefine and amorphous propene multipolymer;
(c) the amorphous propene multipolymer of coextrusion and non-sticky polyolefine shell are lower than in temperature on the surface of ring and ball softening point of amorphous propene multipolymer and contact;
(d) cut into small pieces under the amorphous propene multipolymer and the non-sticky polyolefine shell of coextrusion is lower than the amorphous propene multipolymer in temperature the ring and ball softening point, wherein the surface-area that exposes because of cutting be lower than whole die surfaces long-pending 40%, the surface-area of these small pieces under low-viscosity polyolefin coats is greater than 60% like this; With
(e) cut small pieces with the non-sticky powder by 1 to the 20wt% coating that concentration is about cutting small pieces total amount.
2. according to the method for claim 1, has Brookfield Thermosel viscosity 3 when wherein low viscosity non-sticky polyolefine is 150 ℃, 000 to 5, the polyethylene wax of 000cP, its concentration counts about 2 to 10wt% by the gross weight of polyethylene wax and amorphous propene multipolymer.
3. according to the process of claim 1 wherein that the surface-area that exposes is lower than 30% of cutting small pieces total surface area.
4. according to the method for claim 3, wherein the surface-area of Bao Luing is lower than 20% of cutting small pieces total surface area.
5. according to the method for claim 4, wherein the surface-area of Bao Luing is about 10% of cutting small pieces total surface area.
6. according to the process of claim 1 wherein that the non-sticky powder described in (e) is the powdery polyolefin wax compatible with the amorphous propene multipolymer, the BrookfieldThermosel viscosity of this powder in the time of 150 ℃ is 100 to 50,000cP.
7. according to the process of claim 1 wherein the amorphous propene multipolymer of coextrusion and low viscosity non-sticky polyolefine are sent in the cooling fluid before the cutting in step (d) behind the contact cooling surface.
8. amorphous propene copolymer compositions that can be made into small pieces, it comprises the propylene that is not more than about 90wt% and the alpha-olefin comonomer with 2 to 8 carbon atoms of 70wt% at the most, wherein the penetration value of said composition in the time of 23 ℃ greater than 70 to less than 100dmm, Brookfield Thermosel viscosity in the time of 190 ℃ is lower than 1,000cP.
9. composition according to Claim 8, wherein comonomer is selected from ethene and hexene.
10. according to the composition of claim 9, wherein comonomer is about 20 to 70wt% the hexene of comonomer concentration.
11. according to the composition of claim 9, wherein said comonomer is about 10 to 30wt% the ethene of comonomer concentration.
12. composition according to Claim 8, wherein in the time of 23 ℃ penetration value greater than 70 to 95dmm.
13. according to the composition of claim 12, wherein described penetration value is about 75 to 95dmm in the time of 23 ℃.
14. composition according to Claim 8, wherein viscosity is lower than 800cP in the time of 190 ℃.
15. composition according to Claim 8, wherein composition is the polycomponent blend of at least two kinds of different amorphous propene multipolymers, wherein the gained blend contains the propylene that is no more than about 90wt% and the comonomer of the alpha-olefin that is selected from 2 to 8 carbon atoms of 70wt% at the most, the penetration value of wherein a kind of amorphous propene multipolymer in the time of 23 ℃ is lower than 70dmm, the penetration value of another amorphous propene multipolymer is should be enough high, and making the penetration value of gained blend in the time of 23 ℃ is 70 to 100dmm.
16. composition according to claim 15, wherein a kind of amorphous propene multipolymer be tensile strength be lower than 150kPa, 23 ℃ the time penetration value at least when 95dmm and 190 ℃ viscosity be lower than the low tensile strength multipolymer of 1000cP, viscosity was at least the more high tensile multipolymer of 1000cP when another amorphous propene multipolymer was tensile strength greater than 150kPa, 23 ℃ the time penetration value is less than 70dmm and 190 ℃.
17. according to the composition of claim 16, wherein low tensile strength amorphous propene copolymer concentration is about 60 to 95wt%, more the concentration of the amorphous propene multipolymer of high tensile is about 5 to 40wt%.
18. goods, comprise the cutting small pieces that contain amorphous propene copolymer compositions nuclear, described composition nuclear comprises the propylene that is no more than about 90wt% and the alpha-olefin comonomer with 2 to 8 carbon atoms of 70wt% at the most, the penetration value of wherein said composition in the time of 23 ℃ greater than 70 to less than 100dmm, Brookfield Thermosel viscosity in the time of 190 ℃ is lower than 1,000cP; Described nuclear during by 150 ℃ Brookfield Thermosel viscosity be 100 to 50, the low viscosity non-sticky polyolefine shell that penetration value is lower than 20dmm when 000cP and 23 ℃ coats, and covers at least 60% of described nuclear total surface area; With powder coated about 1 to 20wt% the non-sticky powder of described cutting small pieces.
19. according to the goods of claim 18, wherein small pieces are thick about 1mm to 2cm, are about the flat small pieces of 1cm to 20cm and wide about 1cm to 10cm, wherein thickness is lower than length and width.
20. according to the goods of claim 19, the thickness that wherein cuts small pieces is that about 1cm to 10cm and width are about 1cm to 5cm for about 1mm to 1cm, length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96195178A CN1189842A (en) | 1995-05-08 | 1996-04-25 | Process for coestruding a tacky amorphous propylene copolymer compsn. with a low viscosity polyolefin and article prepared thereby |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/435,072 | 1995-05-08 | ||
| CN96195178A CN1189842A (en) | 1995-05-08 | 1996-04-25 | Process for coestruding a tacky amorphous propylene copolymer compsn. with a low viscosity polyolefin and article prepared thereby |
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| CN1189842A true CN1189842A (en) | 1998-08-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115427488A (en) * | 2020-04-13 | 2022-12-02 | 伊士曼化工公司 | Recovery of component amorphous polyolefins |
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1996
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115427488A (en) * | 2020-04-13 | 2022-12-02 | 伊士曼化工公司 | Recovery of component amorphous polyolefins |
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