CA1114277A - Method for bonding shaped parts of soft pvc base with shaped parts of polyolefine polymer - Google Patents
Method for bonding shaped parts of soft pvc base with shaped parts of polyolefine polymerInfo
- Publication number
- CA1114277A CA1114277A CA297,531A CA297531A CA1114277A CA 1114277 A CA1114277 A CA 1114277A CA 297531 A CA297531 A CA 297531A CA 1114277 A CA1114277 A CA 1114277A
- Authority
- CA
- Canada
- Prior art keywords
- shaped parts
- soft pvc
- cross
- polyolefine
- synthetic resin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Landscapes
- Laminated Bodies (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE:
Method for bonding shaped parts made of soft PVC with shaped parts made of polyolefine polymer by heating, comprising the steps of: applying to the surface of the shaped parts of soft PVC to be bonded, a layer of a cross-linking coating synthetic resin made of acrylic resins containing hydroxyl groups and flame laminating the so-coated shaped parts of soft PVC onto the shaped parts of polyolefine polymer to bond the same before completion of the synthetic resin cross-linking.
Method for bonding shaped parts made of soft PVC with shaped parts made of polyolefine polymer by heating, comprising the steps of: applying to the surface of the shaped parts of soft PVC to be bonded, a layer of a cross-linking coating synthetic resin made of acrylic resins containing hydroxyl groups and flame laminating the so-coated shaped parts of soft PVC onto the shaped parts of polyolefine polymer to bond the same before completion of the synthetic resin cross-linking.
Description
'77 The present invention relates to a method ~or permanently bonding shaped parts of soft PVC with shaped parts of polyolefine polymer by heating.
~ itherto, it has not been possible to bond togethex shaped parts made of soft PVC with sllaped parts made of polyole-fines satisfactorily by flame laminating because the melted-on polyolefine material displays no adllesion to the soft PVC. Even laminating processes using an adhesive layer result in only sli~ht adhesive strengths and no permanent adhesion. There are two essential reasons for this. One is to ~e seen in the poor adhesion of the adhesives to the polyolefines, the other in the presence of softeners in the soft PVC, which in the course of time leads to a softener migration from the PVC into the adhesive and thus results in a decrease in adhesion.
The adhesion problems encountered in producing a composite material from a polyethylene foam and a coated or uncoated synthetic fabric by using heat, have already been described in German published application D.O.S. 2,261,299.
According to said German D.O.S. 2,261,299, the composite laminated material is manufactured by coating the synthetic fabric with a polyur~t~ane resin comprising one or two components, using temperatures above the melting range of the ~olyethylene foam material and applying additional pressure to the coated ;
synthetic fabric when bringing the same in contact with the polyethylene foam. This Icnown method for bonding polyethylene foam with synthetic fahrics however is not suitable for permanently bonding shaped parts of soft PVC with shaped parts of polyolefine polymer, since no adequate softener blocking action, i.e. no adequate prevention of the migration of the softener from the soft PVC into the intermediate layer can be obtained with the polyurethane resins that are used. Furthermore, the application of pressure is disadvantageous for the foams used .
.. ...
~ zt~7 in the layer structure since it leads -to permanent de~ormations.
The above recited dra~tbacks are also encountered in the method disclosed in German published application D.O.S.
~ itherto, it has not been possible to bond togethex shaped parts made of soft PVC with sllaped parts made of polyole-fines satisfactorily by flame laminating because the melted-on polyolefine material displays no adllesion to the soft PVC. Even laminating processes using an adhesive layer result in only sli~ht adhesive strengths and no permanent adhesion. There are two essential reasons for this. One is to ~e seen in the poor adhesion of the adhesives to the polyolefines, the other in the presence of softeners in the soft PVC, which in the course of time leads to a softener migration from the PVC into the adhesive and thus results in a decrease in adhesion.
The adhesion problems encountered in producing a composite material from a polyethylene foam and a coated or uncoated synthetic fabric by using heat, have already been described in German published application D.O.S. 2,261,299.
According to said German D.O.S. 2,261,299, the composite laminated material is manufactured by coating the synthetic fabric with a polyur~t~ane resin comprising one or two components, using temperatures above the melting range of the ~olyethylene foam material and applying additional pressure to the coated ;
synthetic fabric when bringing the same in contact with the polyethylene foam. This Icnown method for bonding polyethylene foam with synthetic fahrics however is not suitable for permanently bonding shaped parts of soft PVC with shaped parts of polyolefine polymer, since no adequate softener blocking action, i.e. no adequate prevention of the migration of the softener from the soft PVC into the intermediate layer can be obtained with the polyurethane resins that are used. Furthermore, the application of pressure is disadvantageous for the foams used .
.. ...
~ zt~7 in the layer structure since it leads -to permanent de~ormations.
The above recited dra~tbacks are also encountered in the method disclosed in German published application D.O.S.
2,246,750 wherein likewise a pol~urethane foam sheet is used as adhesion promoter for manufacturing composite ma-terials from foams consisting of non-cross-linked thermoplastics and other laminar products, such as textiles, fleeces, etc., by using heat and pressure.
German published application D.O.S. 2,~35,510, discloses a method of producing a composite material comprisin~ a layer of pol~ethylene foam, wherein a polyurethane resin is applied to the polyethylene foam as adhesion promoter and then the bonding of the coated polyethylene foam is continued. This method also fails when a soft PVC shaped part is to be bonded to the coated polyethylene foam by flame laminating.
The present invention proposes a method of permanently bonding with good adhesion, i.e. a high separating resistance, shaped parts made of soft PVC with shaped parts made of a polyolefine polymer by applying heat without adclitional pressure.
In this regard, the achievement of a good adhesion must he considered as well as the avoidance of softener migration out of the shaped part of soft PVC.
The method according to the pres~nt invention comprises the steps of applying a layer of a cross-linking synthetic resin made of acrylic resins containing hydroxyl groups to the surfaces to be bonded of the shaped parts made of soft PVC and flame-laminating the so-coated parts of soft PVC o~to tn~ sh~ped parts of polyolefine pnlymer before c~,mp]etion of the coating synthetic resin cross linking.
Surprisingly, it was found that a coating made of a cross-linking acrylic resin containing hydroxyl grollps was a good adhesion promoter with a high adhesive strength as well as 2'77 a softener barrier against sof-tener migration from the PVC.
This method permits to bond shaped parts made of soft PVC with shaped parts made of polyolefine polymer by flame laminating a-t an extremely economical cost, that is a-t a very low cost.
The resistance to separation of the bond obtained through use of the method according the invention is higher than the strengths of the ma-terials forming the individual shaped parts. Therefore, in accordance wi-th the inven-tion, a bonding of shaped parts of soft PVC with shaped parts of polyolefine polymer can be obtained in an economical manner, with small expenditure, wherein the various physical properties of the materials can be fully used so that even subsequent deformations of the bond can be made without fear of a later separation thereof.
The shaped parts to be bonded are preferably in the form of sheets, foils, plates, capable of being continuously flame laminated. The use of the invention, however, is not restricted to these flat laminar structures.
As shaped ~arts made of soft PVC, use can be made of shaped parts made of soft PVC only or of a copolymer of solft PVC with vinyl acetate or vinylidenfluoride, in the shape of foils or foams.
The PVC used in accordance with the invention may contain additional thermoplastics substances such as acrylic resins or ethylene or butadiene polymers.
The PVC used in accordance with the invention may also contain, as additives, suitable amounts of stabilizators, pigments, extenders, fillers, lubricants, etc The term "soft PVC" means a PVC bulk mass having a ratio of PVC to softener comprised between 80/20 and 50/50 by weight, calculated on a total weight of 100. As softeners, Z7`~
use can be made of all the known so:Eteners for PVC, such as phthalate, dioxylphthalate, phosphate softeners, adipates, etc...
As polyolefine shaped parts, use can be made of foils or foams of both non-cross-linked and cross-linked polyolefines selected among all the easy-melted polyolefines, such as polyethylene, polypropylene or copolymers thereof. Preferably, use will be made of cross-linked polyethylene foams, such as, for example, those disclo.sed in U.S. Patent N 3,651,183.
Those polyethylene foams the cross-linking of which ranges from 70 to 80%, are made of high pressure polyethylene with a molecular weight of about 40,000 and are manufactured by using dicumyl peroxide as cross-linking agent and azodicarbona mide as propellant.
As heat-hardening acrylic resins con-taining hydroxyl groups use can be made of copolymers of acrylic or methacrylic acid esters obtained by partial esterification of bifunctional alcohols such as ethylglycol, diethyglycol or propan-1,3-diol with acrylic or methacrylic acid . :
: ~, . , ,. ~ : . . ~
7'~
Cross-linking occurs during hea~ hardening. In accordance with the invention, the cross-]inking of -the acrylic resin~
containing hydroxyl groups is effected in particular by using isocyanate hardeners.
In accordance wi~h the present invention ,it is essential that the coating of the synthetic resin is applied to the soft PVC, for example by injection, pressing, pouring, doctor-knife coating, spreading or spraying, to obtain a good adhesion between the selected coating synthetic resin and the soft PVC
and, simultaneously, to avoid migration of the softener, the applied layer forming a softener barrier having a blocking effect onto the migration of the softener from the PVC.
If the coating is initially applied onto the polyolefine, no adequate bond can be obtained with soft PVC.
Bonding of shaped parts made of PVC base and coated in accordance with the invention, to shaped parts made of polyolefine polymer can be effected by flame laminating either immediately or later, but in any case before the end of the cross-linking reaction of the synthetic resin forming the coating. The length of time between the application of the coating and the completion the cross-linking reaction can be up to one day or more, it all depends on the composition of the coating synthetic resin used for the coating. The reaction time of the coating synthetic resin may be from some minutes to a number of hours. Preferably, the synthetic resin may be from some minutes to a number of hours. Preferably, the synthetic resin made of polyacrylates or polymethacrylates containing hydroxyl groups is used together with an isocyanate hardener. To vary the reaction time, the coating synthetic resin may have the following composition: 10 to 100 % by weight of acrylic resin containing hydroxyl groups; 1 to 50 % by weight of a isocyanate 2'~'7 hardener; 0 to 90 % by weight of solvents, for example, esters, ketones, aromatic hydrocarbon or glycoletheracetates; and 0 to 70 ~ by weight of fillers, for example chalk ,siLicates or pigments.
An essenti~l characteristic of the method according to the invention lies in the properties of the coating ~hich may show good to very good adhesion on the soft PVC or the polyolefine material harden through cross-linking ahility, and react out.
Preferably, as already stated, reactive polyacrylates containing hydroxyl groups are used as coating.
The flame laminating ~ethod according to the present invention produces unexpectedly high resistance to separation between the bonded polyolefine materials and the soft PVC materials, which is higher than the strengths of the individual materials.
This method is very particularly advantaqeous sincc these high separating resistances are obtained by flame laminating without additional contact pressu^e processes or further procedural steps.
Depending on the composition of the coating synthetic resin for the coating or the method of applying such coating, for example by pressingj injection, pouring, doctor-knife coating, spreading, spraying, etc., the degree of wetness o the coating is more or less great. In accordance to another prefered embodiment of the invention it is therefore proposed that the layer of coating synthetic resin be dried beore being flame laminated. The applied layer of c~ating synthetic resin is relatively thin and it preferably has a thickness of approximately 10 to 50~ when wet. ~fter drying, it is correspond-ingly reduced.
The finished bond between the two shaped parts of different materials can, if necessary, be subjected to an annealing process, i.e. a heat treatment, in order to reduce stresses and disl~cations linked with this.
.. ..
~ .. . , .- .; : . : .: .. : ~ .
Z'7 7 The me-thod in accordance with the invenkion is prefer-ably used for continuously bonding sheets or plates of cross-linked polye-thylene foam sheets or sof-t PVC foils by flame laminating. Such composite ma-terials are suitable as heat insulating or sound insulating or impact-absorbing covering$, linings, etc.
The method according to invention will be better understood with reference -to the following non-restrictive examples and the accompanying drawing, showing a composite plate obtained in accordance with the present invention, in cross-section.
Example 1 A coating of synthetic resin was applied onto the ':.
reverse of a chemically expanded PVC foam sheet having a ratio of PVC to softener, e.g. benzyl butyl phthalate, of 63 : 37, and fed in roll form in 2 pressing machines, by means of a 48 screen roller. The synthetic resin consisted of 35% by weight of acrylic resin containing hydroxyl groups, e.g. PARALOID OL-42*
of the firm Rohm & Haas, USA, or DEGALAN LS 50/100*or DEGLAN
150/300*of the firm Degussa, or MACRYNAL SM500*of the firm ; Hoechst AG, 32% by weight of fillers (chalk, silicates and pigments), 13% by weight of ~ylol, 12% by weight of ethyl glycol ~: acetate and 8% by weight of isocyanate hardeners (e.g. DESMODUR
(trademark) N, IL) of the firm Bayer AG. In an adjoining drying channel, the layer of synthetic resin was dried to a degree of dryness designated as dust dry. The dried layer had a thickness of about 6 to 7u, whilst previously the applied, wet layer had a wet thickness of 30u~.
In this regard, it should be noted that it is not absolutely necessary for the coating to~be dried.
Subsequently the thus coated sheet was run into a flame laminating device with a flame beam, and was bonded * trademark - 6 -~$~2'7'7 directly behind the flame beam with a continuously onflowing cross-linked polyethylene foam sheet on passing hrough a /
~ ~ ~ "''/
., .
, .
/
- 6a - .
, 2'7'7 subse~uently disposed pair of rollers forming a roll~r gap of, for example, 19 ~m. The total material thickness was 20 mm, and was thereafter deflected to the desired size.
The so obtained composite platcs were stored for one to two days on flat storage blocks for cooling and hardening.
These plates can, if ncccssary, be subjected ~o an annealing process to reduce stresses and dislocations.
Subse~uently these plates were edge-trimmed and packaged.
~xample 2 A coating of synthetic resin having the same composition as specified in example 1 was applied onto one side of a commercial soft PVC roof-insulation sheet having a ratio of PVC to softener of 62 : 38, according to a continuous process in a pressing maclline, by means of a 48 screen roller. After the coating was dried, the coated sheet was run into a flame laminat-ing device and was bonded as in E~ample 1 with a continuously fed cross-linked polyethylene foam sheet. The bonded sheets were then rolled on rollers and deflected as desired and kept for one to two days on storage blocks. They were annealed if necessary before being packaged.
The so obtained composite materials can be used e.g. in heat insulating coverings.
The method according the invention is not restricted only to shaped parts com~risiny one layer of YVC or polyolefine.
It is also possible to bond multi~layer shaped parts, which, in each case, have one layer of polyolefine or soft PVC and to obtain strongly adhesive bond of poly~l~fine materials wi-th soft PVC materials.
-7_
German published application D.O.S. 2,~35,510, discloses a method of producing a composite material comprisin~ a layer of pol~ethylene foam, wherein a polyurethane resin is applied to the polyethylene foam as adhesion promoter and then the bonding of the coated polyethylene foam is continued. This method also fails when a soft PVC shaped part is to be bonded to the coated polyethylene foam by flame laminating.
The present invention proposes a method of permanently bonding with good adhesion, i.e. a high separating resistance, shaped parts made of soft PVC with shaped parts made of a polyolefine polymer by applying heat without adclitional pressure.
In this regard, the achievement of a good adhesion must he considered as well as the avoidance of softener migration out of the shaped part of soft PVC.
The method according to the pres~nt invention comprises the steps of applying a layer of a cross-linking synthetic resin made of acrylic resins containing hydroxyl groups to the surfaces to be bonded of the shaped parts made of soft PVC and flame-laminating the so-coated parts of soft PVC o~to tn~ sh~ped parts of polyolefine pnlymer before c~,mp]etion of the coating synthetic resin cross linking.
Surprisingly, it was found that a coating made of a cross-linking acrylic resin containing hydroxyl grollps was a good adhesion promoter with a high adhesive strength as well as 2'77 a softener barrier against sof-tener migration from the PVC.
This method permits to bond shaped parts made of soft PVC with shaped parts made of polyolefine polymer by flame laminating a-t an extremely economical cost, that is a-t a very low cost.
The resistance to separation of the bond obtained through use of the method according the invention is higher than the strengths of the ma-terials forming the individual shaped parts. Therefore, in accordance wi-th the inven-tion, a bonding of shaped parts of soft PVC with shaped parts of polyolefine polymer can be obtained in an economical manner, with small expenditure, wherein the various physical properties of the materials can be fully used so that even subsequent deformations of the bond can be made without fear of a later separation thereof.
The shaped parts to be bonded are preferably in the form of sheets, foils, plates, capable of being continuously flame laminated. The use of the invention, however, is not restricted to these flat laminar structures.
As shaped ~arts made of soft PVC, use can be made of shaped parts made of soft PVC only or of a copolymer of solft PVC with vinyl acetate or vinylidenfluoride, in the shape of foils or foams.
The PVC used in accordance with the invention may contain additional thermoplastics substances such as acrylic resins or ethylene or butadiene polymers.
The PVC used in accordance with the invention may also contain, as additives, suitable amounts of stabilizators, pigments, extenders, fillers, lubricants, etc The term "soft PVC" means a PVC bulk mass having a ratio of PVC to softener comprised between 80/20 and 50/50 by weight, calculated on a total weight of 100. As softeners, Z7`~
use can be made of all the known so:Eteners for PVC, such as phthalate, dioxylphthalate, phosphate softeners, adipates, etc...
As polyolefine shaped parts, use can be made of foils or foams of both non-cross-linked and cross-linked polyolefines selected among all the easy-melted polyolefines, such as polyethylene, polypropylene or copolymers thereof. Preferably, use will be made of cross-linked polyethylene foams, such as, for example, those disclo.sed in U.S. Patent N 3,651,183.
Those polyethylene foams the cross-linking of which ranges from 70 to 80%, are made of high pressure polyethylene with a molecular weight of about 40,000 and are manufactured by using dicumyl peroxide as cross-linking agent and azodicarbona mide as propellant.
As heat-hardening acrylic resins con-taining hydroxyl groups use can be made of copolymers of acrylic or methacrylic acid esters obtained by partial esterification of bifunctional alcohols such as ethylglycol, diethyglycol or propan-1,3-diol with acrylic or methacrylic acid . :
: ~, . , ,. ~ : . . ~
7'~
Cross-linking occurs during hea~ hardening. In accordance with the invention, the cross-]inking of -the acrylic resin~
containing hydroxyl groups is effected in particular by using isocyanate hardeners.
In accordance wi~h the present invention ,it is essential that the coating of the synthetic resin is applied to the soft PVC, for example by injection, pressing, pouring, doctor-knife coating, spreading or spraying, to obtain a good adhesion between the selected coating synthetic resin and the soft PVC
and, simultaneously, to avoid migration of the softener, the applied layer forming a softener barrier having a blocking effect onto the migration of the softener from the PVC.
If the coating is initially applied onto the polyolefine, no adequate bond can be obtained with soft PVC.
Bonding of shaped parts made of PVC base and coated in accordance with the invention, to shaped parts made of polyolefine polymer can be effected by flame laminating either immediately or later, but in any case before the end of the cross-linking reaction of the synthetic resin forming the coating. The length of time between the application of the coating and the completion the cross-linking reaction can be up to one day or more, it all depends on the composition of the coating synthetic resin used for the coating. The reaction time of the coating synthetic resin may be from some minutes to a number of hours. Preferably, the synthetic resin may be from some minutes to a number of hours. Preferably, the synthetic resin made of polyacrylates or polymethacrylates containing hydroxyl groups is used together with an isocyanate hardener. To vary the reaction time, the coating synthetic resin may have the following composition: 10 to 100 % by weight of acrylic resin containing hydroxyl groups; 1 to 50 % by weight of a isocyanate 2'~'7 hardener; 0 to 90 % by weight of solvents, for example, esters, ketones, aromatic hydrocarbon or glycoletheracetates; and 0 to 70 ~ by weight of fillers, for example chalk ,siLicates or pigments.
An essenti~l characteristic of the method according to the invention lies in the properties of the coating ~hich may show good to very good adhesion on the soft PVC or the polyolefine material harden through cross-linking ahility, and react out.
Preferably, as already stated, reactive polyacrylates containing hydroxyl groups are used as coating.
The flame laminating ~ethod according to the present invention produces unexpectedly high resistance to separation between the bonded polyolefine materials and the soft PVC materials, which is higher than the strengths of the individual materials.
This method is very particularly advantaqeous sincc these high separating resistances are obtained by flame laminating without additional contact pressu^e processes or further procedural steps.
Depending on the composition of the coating synthetic resin for the coating or the method of applying such coating, for example by pressingj injection, pouring, doctor-knife coating, spreading, spraying, etc., the degree of wetness o the coating is more or less great. In accordance to another prefered embodiment of the invention it is therefore proposed that the layer of coating synthetic resin be dried beore being flame laminated. The applied layer of c~ating synthetic resin is relatively thin and it preferably has a thickness of approximately 10 to 50~ when wet. ~fter drying, it is correspond-ingly reduced.
The finished bond between the two shaped parts of different materials can, if necessary, be subjected to an annealing process, i.e. a heat treatment, in order to reduce stresses and disl~cations linked with this.
.. ..
~ .. . , .- .; : . : .: .. : ~ .
Z'7 7 The me-thod in accordance with the invenkion is prefer-ably used for continuously bonding sheets or plates of cross-linked polye-thylene foam sheets or sof-t PVC foils by flame laminating. Such composite ma-terials are suitable as heat insulating or sound insulating or impact-absorbing covering$, linings, etc.
The method according to invention will be better understood with reference -to the following non-restrictive examples and the accompanying drawing, showing a composite plate obtained in accordance with the present invention, in cross-section.
Example 1 A coating of synthetic resin was applied onto the ':.
reverse of a chemically expanded PVC foam sheet having a ratio of PVC to softener, e.g. benzyl butyl phthalate, of 63 : 37, and fed in roll form in 2 pressing machines, by means of a 48 screen roller. The synthetic resin consisted of 35% by weight of acrylic resin containing hydroxyl groups, e.g. PARALOID OL-42*
of the firm Rohm & Haas, USA, or DEGALAN LS 50/100*or DEGLAN
150/300*of the firm Degussa, or MACRYNAL SM500*of the firm ; Hoechst AG, 32% by weight of fillers (chalk, silicates and pigments), 13% by weight of ~ylol, 12% by weight of ethyl glycol ~: acetate and 8% by weight of isocyanate hardeners (e.g. DESMODUR
(trademark) N, IL) of the firm Bayer AG. In an adjoining drying channel, the layer of synthetic resin was dried to a degree of dryness designated as dust dry. The dried layer had a thickness of about 6 to 7u, whilst previously the applied, wet layer had a wet thickness of 30u~.
In this regard, it should be noted that it is not absolutely necessary for the coating to~be dried.
Subsequently the thus coated sheet was run into a flame laminating device with a flame beam, and was bonded * trademark - 6 -~$~2'7'7 directly behind the flame beam with a continuously onflowing cross-linked polyethylene foam sheet on passing hrough a /
~ ~ ~ "''/
., .
, .
/
- 6a - .
, 2'7'7 subse~uently disposed pair of rollers forming a roll~r gap of, for example, 19 ~m. The total material thickness was 20 mm, and was thereafter deflected to the desired size.
The so obtained composite platcs were stored for one to two days on flat storage blocks for cooling and hardening.
These plates can, if ncccssary, be subjected ~o an annealing process to reduce stresses and dislocations.
Subse~uently these plates were edge-trimmed and packaged.
~xample 2 A coating of synthetic resin having the same composition as specified in example 1 was applied onto one side of a commercial soft PVC roof-insulation sheet having a ratio of PVC to softener of 62 : 38, according to a continuous process in a pressing maclline, by means of a 48 screen roller. After the coating was dried, the coated sheet was run into a flame laminat-ing device and was bonded as in E~ample 1 with a continuously fed cross-linked polyethylene foam sheet. The bonded sheets were then rolled on rollers and deflected as desired and kept for one to two days on storage blocks. They were annealed if necessary before being packaged.
The so obtained composite materials can be used e.g. in heat insulating coverings.
The method according the invention is not restricted only to shaped parts com~risiny one layer of YVC or polyolefine.
It is also possible to bond multi~layer shaped parts, which, in each case, have one layer of polyolefine or soft PVC and to obtain strongly adhesive bond of poly~l~fine materials wi-th soft PVC materials.
-7_
Claims (14)
1. Method for bonding shaped parts made of soft PVC
with shaped parts of polyolefine polymer by heating, comprising the steps of:
- applying to the surface of the shaped parts of soft PVC to be bonded, a layer of a cross-linking coating synthetic resin made of acrylic resins containing hydroxyl groups, and - flame laminating the so-coated shaped parts of soft PVC onto the shaped parts Of polyolefine polymer to bond the same before completion of the synthetic resin cross-linking.
with shaped parts of polyolefine polymer by heating, comprising the steps of:
- applying to the surface of the shaped parts of soft PVC to be bonded, a layer of a cross-linking coating synthetic resin made of acrylic resins containing hydroxyl groups, and - flame laminating the so-coated shaped parts of soft PVC onto the shaped parts Of polyolefine polymer to bond the same before completion of the synthetic resin cross-linking.
2. Method according to claim 1, wherein the coating synthetic resin consists of polyacrylates or polymethacrylates containing hydroxyl groups, together with isocyanate hardeners.
3. Method according ro claim 2, wherein the coating synthetic resin comprises:
10 to 100% by weight of acrylic resin containing hydroxyl groups;
1 to 50% by weight of lsocyanate hardeners;
0 to 90% by weight of solvents selected in the group consisting of esters, ketones, aromatic hydrocarbons and glycol ether acetates; and 0 to 70% by weight of fillers selected in the group consisting of chalk, silicates, pigments.
10 to 100% by weight of acrylic resin containing hydroxyl groups;
1 to 50% by weight of lsocyanate hardeners;
0 to 90% by weight of solvents selected in the group consisting of esters, ketones, aromatic hydrocarbons and glycol ether acetates; and 0 to 70% by weight of fillers selected in the group consisting of chalk, silicates, pigments.
4. Method according to claim 1, 2 or 3, wherein layer of coating synthetic resin is dried before being flame laminated.
5. Method according to claim 1,2, or 3,wherein that the layer of coating synthetic resin is applied in a thickness of 10 to 50 ยต, when wet.
6. Method according to claim 1, 2 or 3, wherein the bonded shaped parts are annealed.
7. Method according to claim 1, 2 or 3, wherein that shaped parts of soft PVC are flame laminated together with shaped parts of non-cross-linked polyolefine.
8. Method according to claim 1, 2 or 3, wherein that shaped parts of soft PVC are flame laminated together with shaped parts of cross-linked polyolefine.
9. Method according to claim 1,2 or 3, wherein that shaped parts are of soft PVC foam which are flame laminated together with shaped parts of cross-linked polyolefine.
10. Method according to claim 1, 2 or 3, wherein that shaped parts of soft PVC foam which are flame laminated together with shaped parts of non-cross-linked polyolefine.
11. Method according to claim 1, 2 or 3, wherein that shaped parts of soft PVC are flame laminated together with shaped parts of non-cross-linked polyolefine foam.
12. Method according to claim 1, 2 or 3, wherein that shaped parts of soft PVC are flame laminated together with shaped parts of cross-linked polyolefine foam.
13. Method according to claim 1, 2 or 3, wherein that shaped parts are of soft PVC foam which are flame laminated together with shaped parts of cross-linked polyolefine foam.
14. Method according to claim 1, 2 or 3, wherein that shaped parts are of soft PVC foam which are flame laminated together with shaped parts of non-cross-linked polyolefine foam.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2607727A DE2607727C3 (en) | 1975-03-06 | 1976-02-25 | Multicolor developing device |
| DEP2607727.6 | 1977-02-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1114277A true CA1114277A (en) | 1981-12-15 |
Family
ID=5970865
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA297,531A Expired CA1114277A (en) | 1976-02-25 | 1978-02-22 | Method for bonding shaped parts of soft pvc base with shaped parts of polyolefine polymer |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1114277A (en) |
-
1978
- 1978-02-22 CA CA297,531A patent/CA1114277A/en not_active Expired
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