CA2039305A1 - Polyurethane adhesive for pvc/wood laminating - Google Patents
Polyurethane adhesive for pvc/wood laminatingInfo
- Publication number
- CA2039305A1 CA2039305A1 CA 2039305 CA2039305A CA2039305A1 CA 2039305 A1 CA2039305 A1 CA 2039305A1 CA 2039305 CA2039305 CA 2039305 CA 2039305 A CA2039305 A CA 2039305A CA 2039305 A1 CA2039305 A1 CA 2039305A1
- Authority
- CA
- Canada
- Prior art keywords
- weight
- diol
- adhesive
- heat resistant
- dibutyl tin
- 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.)
- Abandoned
Links
Landscapes
- Adhesives Or Adhesive Processes (AREA)
- Polyurethanes Or Polyureas (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A heat resistant laminate material consisting essentially of a wood containing substrate base member directly secured to a polyvinylchloride film by a polyurethane adhesive comprising consisting essentially of 30 to 36% by diphenylmethane diisocyanate; 13.5 to 19.5% by weight ethylene oxide capped polypropylene oxide diol; 32.5 to 41.5% by weight neopentyl adipate ester diol, 8 to 17% by weight hydroxyl terminated polybutadiene, 0.5 to 2.5% by weight diethyl malonate and 0.035 to 0.050% by weight dibutyl tin dilaurate.
A heat resistant laminate material consisting essentially of a wood containing substrate base member directly secured to a polyvinylchloride film by a polyurethane adhesive comprising consisting essentially of 30 to 36% by diphenylmethane diisocyanate; 13.5 to 19.5% by weight ethylene oxide capped polypropylene oxide diol; 32.5 to 41.5% by weight neopentyl adipate ester diol, 8 to 17% by weight hydroxyl terminated polybutadiene, 0.5 to 2.5% by weight diethyl malonate and 0.035 to 0.050% by weight dibutyl tin dilaurate.
Description
2~3~3;~
POLYURETHANE ADHESIVE FOR PVC/WOOD LAMINATING
Laminates are commonly used substitutes for hard wood where durability, machinability, water resistance, cost and/or other factors dictate against the use of raw wood surfaces. Thus, laminates are formed into furniture, door or window frames and Bills, kitchen cabinets, desk tops, display cases and the like.
In general, such laminates are formed from wood or board substrates to which polyvinyl chloride or other plastic substrate i9 bonded using an adhesive ccating. In addition to the normal adhesive and cohesive requirements associated with theae laminates, the nature and configuration of the base substrate often places additional stringent requirements on the adhesive composition per se.
Thus, many of the laminates are formed by bonding the plastic substrate to a curved or irregularly shaped substrate, a factor which put~ greater stress on the adhesive bond. Further, the base substrates utilized in the laminate production often contain irregularities such as gaps on their surfaces. It i9 therefore desirable to utilize an adhesive which will serve a~ a gap filler or will otherwise compensate for the irregularities of the surface in the final laminate construction. Moreover, the resulting laminate is often utilized in environments which are exposed to severe changes in temperature and consequently the adhesive must be able to accommodate such cyclical temperature fluctuations.
The present invention relates to a heat resistant laminate wherein a wood ba~e or other substrate member is directly adhered to a decorative plastic film using a ~pecific polyurethane as well as to the polyurethane adhesive composition therefor. In more detail, the polyurethane adhesive of the present invention consist~ essentially of 30 to 36% by weight diphenylmethane diibocyanate (MDI);
13.5 to 19.5% by weight ethylene oxide capped polypropylene oxide diol; 32.5 to 3 ~ ~
41.5~ by weight neopentyl adipate ester diol, 8 to 17~ by weight hydroxyl terminated polybutadiene, 0.5 to 2.5~, preferably 0.8 to 1.2~, by welght diethylmalonato and 0.035 to 0.050~ dibutyl tin dilaurate. Higher levels of dibutyl tindilaurate, e.g. up to about 0.5~ by weight, may be used but no advantage i~
achleved thereby. The resulting adhesive is characterized by lmproved ~trength on aging, even when expofled to fluctuating temperature condition~. Moreover, the adhe~ive, when applied, serve~ as a gap filler to accommodate any irregularitie~in the substrate thereby producing a final laminate of excellent quality.
The polyurethane adhenive compo~ition disclo~ed herein as prepared in a conventional manner by the reaction of an ethylene oxide capped polypropylene oxide diol having an average molecular weLght ~number average~) of about 4000 (e.g. Poly G 55-28 from Olin Chemicals), neopentyl adipate ester diol having an average molecular weight of about 1000 ~e.g. Ruccoflex S-107-110 from Ruco Polymer Corp.) and a hydroxyl terminated polybutadiene having an average molecular weight of about 2800 ~e.g. Poly ~D R-45 HT from sartomer) with an excess of the diphenylmethane diisocyante (e.g. Mondur M from Mobay) to form a branched polymer having a slight excess of free isocyanate groups. Subsequently,the diethyl malonate and then the dibutyl tin d$1aurate are admixed with the re~ulting polymer.
It is generally recognized in the urethane art to react the diisocyanate and hydroxylic reagent~ in a dry inert atmo~phere such as dry nitrogen in the presence of a cataly~t. Catalysts for this reaction are well known in the art and include numerous organometallic compounds such as heavy metal carboxylates (e.g. dibutyl tin dilaurate, stannou~ octoate, lead octoate, mercuric succinate), as well as amines and the ferric complex of acetoacetic ester. In accordance with the pre~ent invention, we have found that polyurethaneadhesives characterized by an unexpected superior balance of properties is produced when dibutyl tin dilaurate as employed a~ the catalyst and i~ present at a level of at least 0.035~ by weight. In contrast, polyurethane adhesives formulated with lower amounts of the dibutyl tin dilaurate catalyst produce substantially poorer performance characteristics when used in the production of plastic/wood laminates.
The re~ulting polyurethane may be used directly in it~ solvent-free form or may be diluted with conventional ~olvents such a~ methyl ethyl ketone, 1,1,1 2 ~
trichloroethane, methylene chloride, toluene, and the like, dependlng upon the application equlpment utilized by the partlcular laminate manufacturer.
The substrate employed in the laminate produced with the adhesive previously described can be chosen from a wide varLety of materials such as particle board,hard board, fiber board, lauan plywood, styrofoam, and the like. This rigid substrate serves as a base to which a thin, pla~tic film is laminated to give tha composite structure and the desired appearance. The plastic film is not restricted to any particular plastic but polyvinyl chloride film is the most commonly employed. The plastic film generally has a thickness of about 1 to 55 mils, preferably 30 to 50 mils, and the substrate is generally at least about five times thicker than the plastic film. The plastic film is adhered to one or more surfaces of the substrate through th~ use of the specific adhesive disclosed herein.
In forming the laminates according to the prevent invention, the selected substrate is sanded and cleaned, if required, and the adhesive is coated on the substrate surface and dried in the cases where solvent is employed. A polyvinyl chloride film is then placed on the adhesive coated surface and lamination is effected at ambient temperature under pressure. Although not required, moderate heat may be used to further accelerate the curing process. Additionally, though not essential, a protective coating may be applied on top of the thin plastic film by spreading a liquid polymeric resin on the pla~tic film surface and then converting the thermopla~tic resin to a strong infusible, clear, colorless solid.
Examl~les In order to prepare the urethane adhesive of the invention, the following procedure was utilized:
A clean and dry reactor was purged with nitrogen and initially charged with 179 part~ diphenylmethane diisocyanate. The contents were heated to melt (between 120-180 P) whereupon 59.5 parts hydroxyl terminated polybutadiene were added with agitation, followed by the slow addition of 208 parts of neopentyl adipate ester diol over a period of 1 to 6 hours while the temperature was maintained between 120-180 F. Then 89 parts Of ethylene oxide capped polypropylene diol were added and the temperature brought to 110-120 F for a period of 2-3 hours to insure complete reaction. Diethyl malonate, 5.21 parts, 2 'i~ `J 4?~ '3 was then disaolved into the fluid polymer followed by the addition of 0.19 partadibutyl tin dllaurate. The reaultant adhe~lve wa~ de~ignated Adhuaive 1.
Uslng a simllar procedure, Adhesives 1-4 de~crlbed ln Table I were prepared.
Adhesives I and 2 are repreaentatlve of the inventlon whLle adhesives 3 and 4 5 represent compo~itions of the prior art prepared wlth lower levela of the dlbutyl tin dilaurate catalyst.
TABLF I
Ingrodients (bv wei~ht) 1 2 3 4 Diphenylmethane diiosyanate 33 33 33 33 Hydroxyl Terminated 11 11 11 11 Polybutadiene Neopentyl Adipate ester diol 38.5 38.5 38.5 38.5 Ehtylene Oxide Capped Polypropylene diol 16.5 16.5 16.5 16.5 Dlethyl Malonate 0.965 0.950 0.972 0.975 Dlbutyltin Dilaurate 0.035 0.050 0.025 0.028 Test Sam~le Pre~aration A 3/8 lnch partlcle board substrate was coated with the urethane adhesive to be tested. Thereafter, a 40 mil thick polyvinyl chloride film was laminated to the adhesive coated surface using a hand roller and the laminates were stacked and allowed to cure for the time indicated in Table II. The re~ulting laminates were then tested Using the following testing procadures.
Peel Strencth Test Procedure 4 x 1 inch segments of PVC laminated wood prepared as above were cut for use as test ~amples. The laminate was stripped back along the irst square inch and a pair of locking pliers was gripped onto the laminate tab. A Hunter Force Gaugewas attached to the locking pliers and with even hand presaure the laminate was peeled away from the wood at a 90 angle. The continuous peel strength wall read directly from the gauge and the moda of failure recorded.
The resulta of the testing of Adheaives 1, 2 and 3 are presented in Table II.
t ~ 3! 3'~ ~ ~
Table II
Effect of Catalvst Concentration on Peel Strenath~1~
Adhesive 1 Adhe~lve 2 Adhe~lve 3 % Catalvst bv WtØ035% 0.050~ 0.025 5Cure Time 4 hrs @ 72 F 1.9 pli 1.9 pli 1.2 pli 8 hrs @ 72 F 11.7 pli 11.3 pli 5.5 pli 12 hrs @ 72 F 23.7 pli 23.7 pli 14.8 pli 24 hrs @ 72 F 26.0 pli 26.4 pli 18.8 pli 1048 hrs @ 72 F25.5 pli 27.9 pli 21.7 pli (1) Peel strengths reported are an average of three samples.
The results of the peel strength testing illustrate the dramatic and unexpected difference in performance between the specific adhesive compositions of the invention ~Adhesives 1 and 2) which were prepared with 0.035% and 0.050$
of the dibutyl tin dilaurate catalyst as compared to the control adhesive (Adhesive 3) prepared with 0.025% dibutyl tin dilaurate. The results of these tests for the sample# prepared with 0.025 and 0.035% dibutyl tin dilaurate (Adhesives 1 and 3) are also plotted in Figure I.
As is also seen from the results presented in Table III, amounts of the catalyst in excess of 0.035% may be employed; however, little or no additional benefit to be achieved thereby as contrasted with the level of improvement between the Adhesive I of the invention and the control adhesive containing lower levelsof catalyst.
In a further test, sample laminates were prepared as previously described and allowed to cure overnight. one set of samples were then conditioned for 24 hoursat 180 F and another set soaked for 24 hour~ in 74 F water. After conditioning, ths uamples were equilibrated for 2 hours at 72 F and tested using the peel strength procedure described above. The results of the testing are shown in Table III.
~ ~3~ 3 ~J ~
TAsL~ III
Peel Strength Adhesive 1 Adhesive 4 Conditionin~
24 hours @ 180 F 26.0 pli 12.3 pli 24 hours @ 74 E~ water 20.6 pli 17.0 pli Additionally, when 1aminates prepared as described above using Adhesive I
were exposed to repeated cycllcal temperature change~ varying between -20 and 180 F, the bonds withstood ~ubstantially more cycles than did the currently utilized commercial adhesive Composition.
Various change~ and modifications can be made in the process and products of this invention without departing from the spirit and ~cope thereof. The variou~
embodiment~ set forth herein were for the purpose of further illustrating the invention but were not intended to limit it.
POLYURETHANE ADHESIVE FOR PVC/WOOD LAMINATING
Laminates are commonly used substitutes for hard wood where durability, machinability, water resistance, cost and/or other factors dictate against the use of raw wood surfaces. Thus, laminates are formed into furniture, door or window frames and Bills, kitchen cabinets, desk tops, display cases and the like.
In general, such laminates are formed from wood or board substrates to which polyvinyl chloride or other plastic substrate i9 bonded using an adhesive ccating. In addition to the normal adhesive and cohesive requirements associated with theae laminates, the nature and configuration of the base substrate often places additional stringent requirements on the adhesive composition per se.
Thus, many of the laminates are formed by bonding the plastic substrate to a curved or irregularly shaped substrate, a factor which put~ greater stress on the adhesive bond. Further, the base substrates utilized in the laminate production often contain irregularities such as gaps on their surfaces. It i9 therefore desirable to utilize an adhesive which will serve a~ a gap filler or will otherwise compensate for the irregularities of the surface in the final laminate construction. Moreover, the resulting laminate is often utilized in environments which are exposed to severe changes in temperature and consequently the adhesive must be able to accommodate such cyclical temperature fluctuations.
The present invention relates to a heat resistant laminate wherein a wood ba~e or other substrate member is directly adhered to a decorative plastic film using a ~pecific polyurethane as well as to the polyurethane adhesive composition therefor. In more detail, the polyurethane adhesive of the present invention consist~ essentially of 30 to 36% by weight diphenylmethane diibocyanate (MDI);
13.5 to 19.5% by weight ethylene oxide capped polypropylene oxide diol; 32.5 to 3 ~ ~
41.5~ by weight neopentyl adipate ester diol, 8 to 17~ by weight hydroxyl terminated polybutadiene, 0.5 to 2.5~, preferably 0.8 to 1.2~, by welght diethylmalonato and 0.035 to 0.050~ dibutyl tin dilaurate. Higher levels of dibutyl tindilaurate, e.g. up to about 0.5~ by weight, may be used but no advantage i~
achleved thereby. The resulting adhesive is characterized by lmproved ~trength on aging, even when expofled to fluctuating temperature condition~. Moreover, the adhe~ive, when applied, serve~ as a gap filler to accommodate any irregularitie~in the substrate thereby producing a final laminate of excellent quality.
The polyurethane adhenive compo~ition disclo~ed herein as prepared in a conventional manner by the reaction of an ethylene oxide capped polypropylene oxide diol having an average molecular weLght ~number average~) of about 4000 (e.g. Poly G 55-28 from Olin Chemicals), neopentyl adipate ester diol having an average molecular weight of about 1000 ~e.g. Ruccoflex S-107-110 from Ruco Polymer Corp.) and a hydroxyl terminated polybutadiene having an average molecular weight of about 2800 ~e.g. Poly ~D R-45 HT from sartomer) with an excess of the diphenylmethane diisocyante (e.g. Mondur M from Mobay) to form a branched polymer having a slight excess of free isocyanate groups. Subsequently,the diethyl malonate and then the dibutyl tin d$1aurate are admixed with the re~ulting polymer.
It is generally recognized in the urethane art to react the diisocyanate and hydroxylic reagent~ in a dry inert atmo~phere such as dry nitrogen in the presence of a cataly~t. Catalysts for this reaction are well known in the art and include numerous organometallic compounds such as heavy metal carboxylates (e.g. dibutyl tin dilaurate, stannou~ octoate, lead octoate, mercuric succinate), as well as amines and the ferric complex of acetoacetic ester. In accordance with the pre~ent invention, we have found that polyurethaneadhesives characterized by an unexpected superior balance of properties is produced when dibutyl tin dilaurate as employed a~ the catalyst and i~ present at a level of at least 0.035~ by weight. In contrast, polyurethane adhesives formulated with lower amounts of the dibutyl tin dilaurate catalyst produce substantially poorer performance characteristics when used in the production of plastic/wood laminates.
The re~ulting polyurethane may be used directly in it~ solvent-free form or may be diluted with conventional ~olvents such a~ methyl ethyl ketone, 1,1,1 2 ~
trichloroethane, methylene chloride, toluene, and the like, dependlng upon the application equlpment utilized by the partlcular laminate manufacturer.
The substrate employed in the laminate produced with the adhesive previously described can be chosen from a wide varLety of materials such as particle board,hard board, fiber board, lauan plywood, styrofoam, and the like. This rigid substrate serves as a base to which a thin, pla~tic film is laminated to give tha composite structure and the desired appearance. The plastic film is not restricted to any particular plastic but polyvinyl chloride film is the most commonly employed. The plastic film generally has a thickness of about 1 to 55 mils, preferably 30 to 50 mils, and the substrate is generally at least about five times thicker than the plastic film. The plastic film is adhered to one or more surfaces of the substrate through th~ use of the specific adhesive disclosed herein.
In forming the laminates according to the prevent invention, the selected substrate is sanded and cleaned, if required, and the adhesive is coated on the substrate surface and dried in the cases where solvent is employed. A polyvinyl chloride film is then placed on the adhesive coated surface and lamination is effected at ambient temperature under pressure. Although not required, moderate heat may be used to further accelerate the curing process. Additionally, though not essential, a protective coating may be applied on top of the thin plastic film by spreading a liquid polymeric resin on the pla~tic film surface and then converting the thermopla~tic resin to a strong infusible, clear, colorless solid.
Examl~les In order to prepare the urethane adhesive of the invention, the following procedure was utilized:
A clean and dry reactor was purged with nitrogen and initially charged with 179 part~ diphenylmethane diisocyanate. The contents were heated to melt (between 120-180 P) whereupon 59.5 parts hydroxyl terminated polybutadiene were added with agitation, followed by the slow addition of 208 parts of neopentyl adipate ester diol over a period of 1 to 6 hours while the temperature was maintained between 120-180 F. Then 89 parts Of ethylene oxide capped polypropylene diol were added and the temperature brought to 110-120 F for a period of 2-3 hours to insure complete reaction. Diethyl malonate, 5.21 parts, 2 'i~ `J 4?~ '3 was then disaolved into the fluid polymer followed by the addition of 0.19 partadibutyl tin dllaurate. The reaultant adhe~lve wa~ de~ignated Adhuaive 1.
Uslng a simllar procedure, Adhesives 1-4 de~crlbed ln Table I were prepared.
Adhesives I and 2 are repreaentatlve of the inventlon whLle adhesives 3 and 4 5 represent compo~itions of the prior art prepared wlth lower levela of the dlbutyl tin dilaurate catalyst.
TABLF I
Ingrodients (bv wei~ht) 1 2 3 4 Diphenylmethane diiosyanate 33 33 33 33 Hydroxyl Terminated 11 11 11 11 Polybutadiene Neopentyl Adipate ester diol 38.5 38.5 38.5 38.5 Ehtylene Oxide Capped Polypropylene diol 16.5 16.5 16.5 16.5 Dlethyl Malonate 0.965 0.950 0.972 0.975 Dlbutyltin Dilaurate 0.035 0.050 0.025 0.028 Test Sam~le Pre~aration A 3/8 lnch partlcle board substrate was coated with the urethane adhesive to be tested. Thereafter, a 40 mil thick polyvinyl chloride film was laminated to the adhesive coated surface using a hand roller and the laminates were stacked and allowed to cure for the time indicated in Table II. The re~ulting laminates were then tested Using the following testing procadures.
Peel Strencth Test Procedure 4 x 1 inch segments of PVC laminated wood prepared as above were cut for use as test ~amples. The laminate was stripped back along the irst square inch and a pair of locking pliers was gripped onto the laminate tab. A Hunter Force Gaugewas attached to the locking pliers and with even hand presaure the laminate was peeled away from the wood at a 90 angle. The continuous peel strength wall read directly from the gauge and the moda of failure recorded.
The resulta of the testing of Adheaives 1, 2 and 3 are presented in Table II.
t ~ 3! 3'~ ~ ~
Table II
Effect of Catalvst Concentration on Peel Strenath~1~
Adhesive 1 Adhe~lve 2 Adhe~lve 3 % Catalvst bv WtØ035% 0.050~ 0.025 5Cure Time 4 hrs @ 72 F 1.9 pli 1.9 pli 1.2 pli 8 hrs @ 72 F 11.7 pli 11.3 pli 5.5 pli 12 hrs @ 72 F 23.7 pli 23.7 pli 14.8 pli 24 hrs @ 72 F 26.0 pli 26.4 pli 18.8 pli 1048 hrs @ 72 F25.5 pli 27.9 pli 21.7 pli (1) Peel strengths reported are an average of three samples.
The results of the peel strength testing illustrate the dramatic and unexpected difference in performance between the specific adhesive compositions of the invention ~Adhesives 1 and 2) which were prepared with 0.035% and 0.050$
of the dibutyl tin dilaurate catalyst as compared to the control adhesive (Adhesive 3) prepared with 0.025% dibutyl tin dilaurate. The results of these tests for the sample# prepared with 0.025 and 0.035% dibutyl tin dilaurate (Adhesives 1 and 3) are also plotted in Figure I.
As is also seen from the results presented in Table III, amounts of the catalyst in excess of 0.035% may be employed; however, little or no additional benefit to be achieved thereby as contrasted with the level of improvement between the Adhesive I of the invention and the control adhesive containing lower levelsof catalyst.
In a further test, sample laminates were prepared as previously described and allowed to cure overnight. one set of samples were then conditioned for 24 hoursat 180 F and another set soaked for 24 hour~ in 74 F water. After conditioning, ths uamples were equilibrated for 2 hours at 72 F and tested using the peel strength procedure described above. The results of the testing are shown in Table III.
~ ~3~ 3 ~J ~
TAsL~ III
Peel Strength Adhesive 1 Adhesive 4 Conditionin~
24 hours @ 180 F 26.0 pli 12.3 pli 24 hours @ 74 E~ water 20.6 pli 17.0 pli Additionally, when 1aminates prepared as described above using Adhesive I
were exposed to repeated cycllcal temperature change~ varying between -20 and 180 F, the bonds withstood ~ubstantially more cycles than did the currently utilized commercial adhesive Composition.
Various change~ and modifications can be made in the process and products of this invention without departing from the spirit and ~cope thereof. The variou~
embodiment~ set forth herein were for the purpose of further illustrating the invention but were not intended to limit it.
Claims (16)
1. A heat resistant laminate comprising a substrate base member directly secured to a plastic film by a polyurethane adhesive, said adhesive consisting essentially of 30 to 36% by weight diphenylmethane diisocyanate; 13.5 to 19.5% by weight ethylene oxide capped polypropylene oxide diol; 32.5 to 41.5% by weight neopentyl adipate ester diol, 8 to 17% by weight hydroxyl terminated polybutadiene, 0.5 to 2.5% by weight diethyl malonate and 0.035 to 0.050% by weight dibutyl tin dilaurate.
2. The heat resistant laminate of Claim I wherein the dibutyl tin dilaurate is present at a level of 0.035% by weight.
3. The heat resistant laminate of Claim 1 wherein the diethyl malonate is present in an amount of 0.8 to 1.2% by weight.
4. The heat resistant laminate of Claim 1 wherein the ethylene oxide capped polypropylene oxide diol has a molecular weight of 4000; the neopentyl adipate ester diol has a molecular weight of 1000 and the hydroxyl terminated polybutadiene has a molecular weight of 2800.
5. The heat resistant laminate of Claim 1 wherein the base substrate is wood.
6. The heat resistant laminate of Claim 1 wherein the plastic film is a polyvinylchloride film.
7. In a process for preparing a heat resistant laminate comprising the steps of bonding a plastic film to a base substrate using an adhesive composition, the improvement which comprises using as the adhesive, a polyurethane adhesive consisting essentially of 30 to 36% by weight diphenylmethane diisocyante; 13.5 to 19.5% by weight ethylene oxide capped polypropylene oxide diol; 32.5 to 42.5%
by weight neopentyl adipate ester diol, 8 to 17% by weight hydroxyl terminated polybutadiene, 0.5 to 2.5% by weight diethyl malonate and 0.035 to 0.050% by weight dibutyl tin dilaurate.
by weight neopentyl adipate ester diol, 8 to 17% by weight hydroxyl terminated polybutadiene, 0.5 to 2.5% by weight diethyl malonate and 0.035 to 0.050% by weight dibutyl tin dilaurate.
8. The process of Claim 7 wherein the dibutyl tin dilaurate is present at a level of 0.035% by weight.
9. The process of Claim 7 wherein the diethyl malonate is present in an amount of 0.8 to 1.2% by weight.
10. The process of Claim 7 wherein the ethylene oxide capped polypropylene oxide diol has a molecular weight of 4000; the neopentyl adipate ester diol has a molecular weight of 1000 and the hydroxyl terminated polybutadiene has a molecular weight of 2800.
11. The process of Claim 7 wherein the plastic film is a polyvinylchloride film.
12. The process of Claim 7 wherein the base substrate is wood.
13. A polyurethane adhesive composition specifically adapted for the lamination of plastic film to wood substrates, the adhesive consisting essentially of 30 to 36% by weight diphenylmethane diisocyanate; 13.5 to 19.5% by weight ethylene oxide capped polypropylene oxide diol; 32.5 to 41.5% by weight neopentyl adipate ester diol, 8 to 17% by weight hydroxyl terminated polybutadiene, 0.5 to 2.5% by weight diethyl malonate and 0.035 to 0.050% by weight dibutyl tin dilaurate.
14. The adhesive composition of Claim 12 wherein the ethylene oxide capped polypropylene oxide diol has a molecular weight of 4000; the neopentyl adipate ester diol has a molecular weight of 1000 and the hydroxyl terminated polybutadiene has a molecular weight of 2800.
15. The adhesive of Claim 12 wherein the dibutyl tin dilaurate is prevent at a level of 0.035% by weight.
16. The adhesive of Claim 12 wherein the diethyl malonate is present in an amount of 0.8 to 1.2% by weight.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US51038190A | 1990-04-17 | 1990-04-17 | |
| US07/510,381 | 1990-04-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2039305A1 true CA2039305A1 (en) | 1991-10-18 |
Family
ID=24030518
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2039305 Abandoned CA2039305A1 (en) | 1990-04-17 | 1991-03-27 | Polyurethane adhesive for pvc/wood laminating |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2039305A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1314770C (en) * | 2005-07-27 | 2007-05-09 | 成都市双流川双热缩制品有限公司 | New method for connecting polyethylene pipeline and its used adhesive |
-
1991
- 1991-03-27 CA CA 2039305 patent/CA2039305A1/en not_active Abandoned
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1314770C (en) * | 2005-07-27 | 2007-05-09 | 成都市双流川双热缩制品有限公司 | New method for connecting polyethylene pipeline and its used adhesive |
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| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Dead |