JPS5818234A - Device for manufacturing polyurethane foamy material which can be cured - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for the continuous production of polyurethane foam.

Apparatus for generating foams are well known and widely used, primarily for applying the foams to textile materials and the like. The 7-ohm composition is applied to a substrate, and when it contacts the substrate, the bubbles break and the aliphatic acid is absorbed into the cough base.

7 ohm generally consists of a mechanical stirrer capable of mixing a metered amount of a gas such as air and a liquid chemical composition containing the chemicals to be applied to the substrate, and [generate] in a device that converts into 7-oh-5.

However, structurally stable polyurethane foams cannot be produced using prior art foam generators.

U.S. Pat. No. 1,113,821,130 describes a polyether polyol end-capped with at least 2 moles of ethylene oxide per active hydrogen atom, a polyisocyanate F-containing material, and a catalyst for the formation of phrethane. Flexible polycrethane foams made from active gas foamed mixtures are described. The polyether polyol and polyisocyanate are used in amounts such that the NCO2OH ratio is about 0.85:1 to 10:1.

The patent states that the foam does not require the use of volatile blowing agents or silicone oil foam control agents. The 7 ohm of this patent specifies that an inert gas is mechanically introduced into the phletane-forming composition to create a foam, and the foam is applied to a suitable mold or onto a suitable substrate whereupon the foam is formed. A foam mixture is produced by solidifying into a foamed polyurethane product. This patent discloses that conventional foams obtained by mechanically introducing an inert gas into a urethane-forming composition have a very small amount, less than about 1% by volume, of thermal expansion of the inert gas used. It is stated that no significant expansion other than that occurs later. ``Column 113 of this patent specification describes various methods for producing foams. These methods include mechanically stirring air or an inert gas into the mixture of urethane-forming components using a mixer with blades designed to mechanically stir the air into the mixture; It includes mixing things like ``Suna'', ``Wa'', ``Ya''.

Another method consists of a stream consisting of a mixture of urethane-forming components;
Alternatively, separate flows of the fretane-forming components and a flow of air may be supplied to a foam-generating mixer to direct the foamed composition from the zeta-kiner into the mold or onto the substrate, where The method includes heat curing the foamed composition into a flexible polyurethane. Yet another method described in this patent includes feeding an inert gas and all nine urethane forming components other than the catalyst to a foam generating mixer and then combining the catalyst with the resulting foam and oxane. -1 For example, mixing in a still chamber,
The foam is then introduced into a mold or onto a substrate. In Examples 1-'13 of this patent, polyether polyols and isocyanate-containing materials are heated at high speed for a period of about 2 minutes, sufficient to agitate air and create bubbles within the mixture. Place it in a holder (hover) or holder equipped with a blade for foaming. After the foaming is completed, the catalyst is added and the resulting foam is mixed for an additional 4S seconds, then poured into an open container wc and cured.

However, this patent specification does not describe an apparatus for continuous production of foam.

The present invention relates to an apparatus for the continuous production of curable polyurethane foam. The device can process polyols, isocyanates,
separate sources for catalyst and inert gas; separate sources for the polyol, inocyanate and inert gas, and under pressure and at controlled flow rates from the sources for the polyol isocyanate F; and means comprising separate conduits for supplying a mixing device having an inlet opening for receiving an inert gas and an inert gas; mixing the polyol, isocyanate and an inert gas to produce a foam; means and an outlet opening for the foam obtained; means for conveying the foam from said mixing device to a second mixing device; a conduit for supplying a second thermal chamber; means for mixing the foam and the catalyst, the mixing device having an inlet opening for receiving the foam and the catalyst; having an outlet opening for the catalyzed foam;
means for conveying the catalyzed foam from the shell mixer to the base material.

The present inventors have demonstrated that the device of the present invention is a polycretan □ which is structurally stable and can be easily processed at Jilt temperatures.
It was found that foam was produced. The foam has a density of about 18 to about 45 bonds/cubic foot, preferably about 20 to about 35 bonds/cubic foot.

The foam produced can be used, for example, for gluing flannel into frames; adhesives for gluing drywall panels into wood frames; flame-retardant insulation materials; doors and Insulating materials around windows; wood repairs; concrete repairs; Xingu block repairs; can be formed into temporary sidewalks or walkways on soft ground; highway medians; Fillings in post holes to provide an immediate foundation and thus eliminate contact between the post and the ground; covering, protective and insulating jackets for buried piping;
It has applications such as filling material; repairing holes and dents in vehicles; and as a sealer for drywall joints.

The cured polyurethane foam has a substantially closed cell structure. The nuclear bubble is substantially spherical and has a diameter of about 3004 mm or less. Cough bubble diameters range from about 5 microns to about 300 microns. The size of the cells forming the skin of the polyurethane foam is substantially equal to the size of the cells in the interior center of the foam. Therefore, the cell size of the polyurethane foam from surface to surface is substantially uniform except for the cells adhering to the substrate 1-1 and adjacent to the substrate. Such uniformity is contrary to the average uniformity found in the center of polyurethane foams as described above. The density of the cured foam is approximately equal to the density of the foam before curing.

Cured polyurethane is resilient, sandable, and easily painted.

To more clearly describe the multiple embodiments of the invention, FIG.
and FIG. 1b, FIG. 2 showing a side view of containers 29 and 30.

In discussing FIGS. 1 and 2, the description herein is purely illustrative and not limiting in any way. Numerous structural modifications and various embodiments will suggest themselves to those skilled in the art to whom this invention pertains without departing from its spirit and scope.

Polyol packages placed in containers 29 and 30 (
The bulk polyol package (hereinafter referred to as ``polyol'' for purposes of this discussion), isocyanate contained in container 211 and catalyst contained in container 21 are pumped into the container 21 by pumps 34, 33, and 32, respectively. These pumps are driven by a motor 35. Since all pumps are positive displacement,
By using one motor to drive each pump, the capacity is 1i! A fixed, constant ratio of 27, 28, 29 and 30 materials is ensured. The polyol is removed from vessels 29 and 30 and pumped at a constant rate by pump 34. The output of the pump 34 is fixed at the drive-111 speed. The pump is Moino
yno ) unit [-Vince & Meyers Co. (Ro
bbims and May@rs Corporation
ion)] may be used. The power output ranges from about 100 to about 2 Hz per minute depending on the drive speed and adjusting the size of the components.
0(l).

Incyanate is removed from tank 28 through conduit 55 and optionally through filter 51.

Filter 57 removes all impurities and previously reacted materials. Pump 33 is manufactured by Zenith.
A gear-type unit made by Corporation) may be used.
This output is measured by the speed of the drive motor 35.
to 6094 or more. This discharge is conveyed through conduits 59, 61 and 64 and valve 62.

At various times during the foam generation process, it may be desirable to interrupt the flow of isocyanate F without interfering with the flow of other systems. This capability is realized by valves s2 and 66 and conduits 61 and 65. By blocking the flow through valve 62, the output of pump 33 is approximately 100
psi pressure is reached, which opens check valve 66 and allows fluid to flow into conduit 65. This fluid is then recirculated through filter 57 and pump 33 until drive motor 35 is stopped or valve 62 is restarted.

Similarly, the catalyst is pumped out of the tank 27 through the conduit T1 and pumped by the single piston pump 32;
and weigh. Closing valve 81 allows for recirculation of about 0.5 to about 594 effluent streams. This causes flow through conduits 84 and 83;
At this time, the pressure of the discharged material automatically opens the check valve 85.

The chemical supply tanks 27, 28, 29 and Tj 30 are pressurized to minimize the possibility of contamination and to reduce the power output required by the motor 35. This is accomplished by introducing gas from tank 1 through pressure reducing valves 5 and 90 sets and control valve 11 to the top of each tank through conduit 2◎. At 5K, the chemical fluid is at the same pressure as conduit 20, about 60 pm.
i K is reached and facilitates fluid flow to each pump through the inlet conduit, thus minimizing cavitation and unreliable metering.

Generation of foam is caused by an electric motor t- driven by a motor 48.
47 is performed mechanically. Air from fi7 to 'Jp5.18.70 and 13 and conduit 17.68
．． 69, 72 and T4 such that a constant flow rate is maintained. This air and polyol are passed through conduit 4
6 into the mixer. The isocyanate is added via conduit 64, mixing the polyol with air and then stirring to form a foam. Conduit 64 has a small diameter to maintain high fluid velocities and minimize any backflow of reactants that could cause blockages.

The urethane foam is passed through conduit 75 to catalyst injector 76.
send to Catalyst flows to the catalyst injector via conduit 82. The conduit 82 has a small diameter and has a through-system operation (gonlliatentaY11tl!1111op
) to minimize conduit and fluid elastic effects.

The foam and catalyst pass to a static mixer 86 which mixes the ingredients to a uniform homogeneity. The curable foam is a substrate KWILIII! can be applied to,
Alternatively, it can be applied using the applicator 81C. The purpose of application with this applicator is to distribute the foam in the desired form.

In particular, in FIG. 1, container 1 is a source of dry gaseous material, preferably dry nitrogen or dry air.

Gas from the ill passes through conduits 2 and 4 under a pressure of about 2700 psi and then passes through pressure reducing valve 5 where it is reduced in pressure by about 200 paig K. A portion of the gas passes through conduits 6 and T to pressure reducing valve 9, where it is reduced in pressure by about 60 to 70 psig K. The other portion of the gas passes through conduit 6 and IT to pressure reducing valve 18, where it is reduced to a pressure of about 100 to 150 psig. A pressure switch 8 monitors the gas supply level. Gauge 3 displays gas pressure.

Gas from pressure reducing valve 9 passes through conduit 10 to control valve 11 and then via conduits 12 and 20, with a portion passing through conduit 2.
6 to build up pressure on the contents of container 21, part through conduit 25 to create pressure on the contents of container 28, and part through conduits 21 and 22 to create pressure on the contents of container 29. In addition, a portion applies pressure to the contents of container 3o via conduits 21 and 24.

In an optional embodiment, gas flows from valve 11 to conduit 1
2 and 14, and passes through the pressure reducing valve 15, where 5p
si K is depressurized and then flows through conduit 16 where it pressurizes the contents of vessel 93. The contents of container 83 consist of a cleaning or cleaning solvent.

When the operation is started, the polyol in vessel 29 and/or 3°, the incyanate in vessel 28 and the catalyst in vessel 41627 are pumped to the mixer by pumps 34, 33 and 32, respectively. .

The mixers are driven by a motor 35. In particular, containers 29 and 3 (NC containing polyol are routed via conduits 36 and 31 respectively, then conduits 37, 38 and 4)
1, through pump 34 and conduit 42 to mixer 4.
It reaches 0C. The mixer is driven by a motor 411. The polyols in containers 2S and 30 can be used simultaneously or sequentially. In a preferred embodiment, containers 29 and 30 have floating pistons 52 and 53. These pistons assist in completely emptying the container (especially when using viscous polyols). Additionally, the piston allows the supply of polyol to be cut off and flow from a second container to begin when the container is empty. Pressure switch 54 detects the pressure difference and indicates that both tanks are empty.

Container 40 is a receptacle for the polyol. It is a 1 quart bladder accumulator. When pumping is initiated, polyol from either vessel flows into the accumulator 40 and fills it. Both of you! When the polyols 29 and 30 are emptied, the pressure switch 54 is activated, and the polyols from the container 40 flow into the pump 34 and the scolder 47 under reduced pressure as described above, and the work is continuously interrupted. This prevents cavities between the parts.

Inocyanate is passed from container 28 via conduits 55 and 56, optionally through filter 51, through conduit 58 and through pump 33 to conduits 59 and 61, valve 62 and then conduit 6.
3 and 64, and is pumped to Kina-41. Sometimes it may be desirable to interrupt the flow of incyanate without stopping the flow of other components. In this optional scheme, closing valve 62 interrupts the flow from K, causing the output of pump 33 to drop to about 100 m
K to suit the pressure of psi, and from this K the valve 66
opens, allowing the isocyanate to pass through conduit 65. The incyanate is then recirculated through filter 51 and pump 33 until motor 35 is stopped or body 62 is restarted.

Air is supplied to Michut-47 to produce foam. Air flows from tank 1 to conduits 2 and 4, valve 5, conduits 6 and 11,
Pressure regulator 18, conduits 68 and 69, directional control valve 70
, conduit 72, flow control valve T3, and conduit 14, where the scissor air combines with the polyol from conduit 42 at tee 43, and both materials then pass through conduit 42 to strainer 41. At the same time, isocyanate flows into the electric kina-47 as described above.

The generated foam is sent from the energizer 4T to the catalyst injector 76 via a conduit 75. The catalyst passes it from vessel 27 through conduits 71 and 78, through pump 32, and through conduit 7.
9 and 80 through valve 81 and then via conduit 82 to catalyst injector 16. In an optional embodiment, valve 81 is closed and this closes valve 85 and conduits 83 and 1 when pressure causes valve 85 to close automatically.
Recirculation can be achieved by creating a flow through 8 and k.

Preferred catalytic injectors are Bee, Binx) y
(B, Pinkston) January 8, 1980
The present invention was filed on the same day as the present invention and handed over to the assignee K11l.
115,623, filed in co-pending U.S. patent application Ser. The apparatus described in said Patent Application Serial No. 116,623 is an apparatus for producing a mixture of chemical compositions, the apparatus comprising: (a) extending through a housing and discharging at least one component into a tube; (b
) providing at least one component that is either reactive with one or more components of (a) or catalyzes the reaction of two or more components of (a); (C) an inlet means for transferring the component from the axillary annular groove into a plurality of the conical members, the inlet means communicating with an annular groove in the conical member for receiving the component; and means for distributing the component into a channel, the channel comprising an elongate housing having means for directing the component into the flow of component (a) within the tube.

A stationary mixer 86 mixes the catalyst and the foam; the foam is then deposited onto the substrate by an applicator 87. The applicator 81 can arrange the foam into a desired shape.

In an optional embodiment of the invention, a solvent may be used to perform the cleaning described below. i.e. 11+ner 4
71i Conduit 75 for transporting material from inocyanate container
a conduit 75 transporting the foam from the tank t-47; a catalyst inlet turf 6; a power tank t-81is and an applicator 81.

Air is transferred from the control device 11 to conduit 12, tee 1g, conduit 1
4. Through the control device 15, the control device 15 reduces the pressure by about 5 pal ic as necessary, and through the conduit 16 the container! 13, pressurize the solvent in it [container 9
Build up pressure on the contents of 3.

In preparation for using the solvent cleaning method, air from conduit 101 is directed through valve 103IC to conduit 104, and cylinder 1
05 (cylinder 105 has a size of 2 inches) and pressurizes. From this k, the piston rule, the bonito 95 moves, and from that k, the cylinder 1011
The volume of the empty IW 96 inside increases. (Cylinder 108
has a size of 4 inches. ) As the volume increases, solvent is pumped out via conduit 8I, check valve 9o and conduit 107, filling cavity 96. This system is easy to clean. If it is desired to clean the system, conduit 101
Air from now enters conduit 102, electrically driving valve 103 to another position so as to fill and pressurize cavity 91. The pressure used in the cavity Si then reduces the volume of the cavity aSS, and the solvent therein flows into the conduit 1.
09, passes through check valve 11G and conduits 111 and 64 into kit t-47 and washes the material therein to remove any downstream components present through the buildup and ultimately applicator 81. Cleanse. Preferred solvents are 7% zero-glycanized hydrocarbons such as methylene coolide or ketones such as acetone or methyl ethyl ketone.

The total end-to-end movement of the piston cuff 95 is 3 inches. .

m2 is a side view of the container shown as Figures IK39 and 3o used to hold the polyol bagage. The tank cylinder 201 is a 7-gain aluminum Ecum housing with a 20T top and a handle 20.
1m is the installation.

The top can be removed and the polyol added. O-rings 205 provide a seal to prevent material from leaking between the top and sides of the cylinder.

The air inlet 203 receives air under pressure, and the piston 2
Pressure is created on 06 to force the wrinkled piston against the contents of the container so that the contents are forced into the system via suction tube 207 and through outlet 204. When the cylinder is emptied, the piston 206 is in a piston state, sealing the suction tube 202 and thereby sealing the system.

If the catalyst is injected into the foam and then mixed with the foam in a binder, the curing time of the foam is greatly reduced. Using this foam catalytic technique, most of the curing can occur within about 90 seconds in bulk and about 30 to about 50 minutes in thin layers.

Moreover, the addition of the catalyst promotes curing, prevents gelation on the walls of the hose or the accumulation of highly viscous or gelled substances, and prevents foam formation within the hose. A long-life limb hose transports the foam from the mixer to the substrate on which it is deposited. Furthermore, the addition of a catalyst minimizes secondary foaming after the foam has been applied to a substrate, such as a joint formed by two adjacent wall panels. . When the isocyanate reacts with co, which produces moisture, secondary foaming occurs and an uneven surface is obtained. As mentioned above, the addition of a catalyst accelerates curing as the foam passes through the hose and is applied to the substrate, thereby
Secondary foaming is virtually eliminated when using sufficiently low hygroscopic polyol(s).

B / (-x (B, Barth) et al. 198
[A) Four Sueple Polyurethane Compositsilon and Cellular Foam 4 Deacede] filed on January 28, 2013 and filed by the same applicant as the present invention.
Zea7EIA (Mufrothable Polyuret
hane Coxapoitation and Ce1
lular Foam Proaucea Theref
Co-pending chapter patent application serial number 115 with the name rom)
, 629 describes curable foams and preferred foamable thermoset polyurethane forming compositions. The curing can be effected by mixing air or other gaseous substances with a polyol (including a thixotrope and one or more optional ingredients) and an isocyanate, as described in said patent application. A foam is produced. Gases and polyols (thixotropic and 1
The catalyst is preferably added to the foam prepared by mixing the isocyanate and the isocyanate.

Suitable gaseous substances for use in the present invention include any gaseous element, compound or mixture thereof that exists in a gaseous state at standard temperature and pressure, i.e. 25° C. and 1 atmosphere; Examples include helium, nitrogen, oxygen, carbon dioxide and air, or mixtures thereof.

However, they will react with any of the urethane-forming components,
Or, provided that it does not dissolve significantly.

4Ik In preparing the curable foam, an isocyanate, a thixotrope-containing polyol and 1
seeds or more optional ingredients in a mixer, preferably an 8 KG or Oaks continuous mixer.
K, separately - weigh out k and at a constant rate. Gaseous substances under pressure can be metered into either the polyol or the isocyanate stream, or both;
Alternatively, it can be metered directly into the mixer containing the polyurethane-forming components. A dense foam is formed in the mixer at pressures above atmospheric but from about 40 to about 150 paig.

The foam is then fed from the mixer into a delivery tube.

As the foam progresses toward the outlet of the delivery tube, the volume of the foam expands (i.e., the density decreases) as the entrained air bubbles expand as the pressure decreases.

Catalyst was injected into the foam at a point downstream of the delivery tube, and the foam/catalyst mixture was passed through an in-line ζ mixer and thereby dispersed. The catalyzed foam was then directed onto the substrate.

The compositions suitable for use herein and described in the aforementioned U.S. Patent Application Ser. The density of the resulting cured foam is substantially the same as the density of the foam composition when cured with at least one layer of the foam exposed to the atmosphere. The composition is composed of (trans) polyol, (b) polyisocyanate, (c) chicken) four bee imparting agent, (幀) inert gas, and (→ for reaction with polyisocyanate: J@), It contains an amount of water that is less than the amount that causes the foaming acid to cure into a foamed polyurethane having a density that is substantially different from that of the foaming composition.

The Isakumi acid is a catalyst and optionally one of the following: surfactants, hygroscopic materials, fillers, fuels, dyes, pigments or any other ingredients that do not introduce significant amounts of moisture into the composition.
It can contain one or more seeds.

Compositions such as those described in said U.S. Patent Application Ser. It is preferable to use the catalyst package in the form of an incyanate package containing an inocyanate package and a catalyst package containing a catalyst that catalyzes the urethane production reaction and a solvent for the catalyst. An inert gas is used to generate the foam.

Useful and preferred polyols or polyol mixtures of the present invention have the following characteristics: an average hydroxyl number as low as possible, no greater than about 300; a viscosity at 25°C of less than or equal to about 5000 centipoise, preferably less than or equal to about 2000 centipoise; gender is equal to or greater than 211C,
preferably equal to or greater than 3; endothermic (34
When the sample is placed in a 25/8 x F/8 inch circular metal casing and placed in a controlled room at 26° C. and a relative humidity of 9 G for 24 hours, the weight increase is less than about 7, preferably less than about 1.

Polyols contain active hydrogen-containing components, such as: polyhydrocarbons (U.S. Pat. No. 2,877,212), polyhydrocarbons (U.S. Pat. Patent No. 2,870,097
Patent No. 2);
No. 833,730-4 and No. 2,878,601) hydroxyl-terminated polyester (U.S.
Il! I Permit No. 2.698,838, No. 2,921,9
No. 15, No. 2,591,884, No. 2, 81it 6
．． ) 6, -2 issue, f12, 830, 476 issue, j12,
No. 602.783, No. 2,729,618, No. 2.7
79°689, No. 2,811,493 and l/1
2. fa21゜166 1 each! Specification);
fl patent No. 733.624); Boria J&l
- Medium arylene ether glycol (U.S. Patent No. 2)
, No. 808,391 (U.S. Pat. No. 2,866,774).

% preferred polyhydroxyl-containing materials are polyether polyols obtained by chemical addition of alkylene oxides with water or polyhydric organic compounds, said alkylene oxides being, for example, ethylene oxide, propylene oxide and mixtures thereof; Examples of organic compounds include:
Ethylene glycol, propylene glycol, trimethylene glycol, 1,2-butylene/9:1-)
y, 1.3-butanediol, 1.4-butanediol, i, s-bentanediol, l, 2-hexylene glycol, 1.10-decanediol, 1.2-cyclohexanediol, 2 -butene-1,4-diol, 3-
Cyclohexane-1,1-dimetatool, 4-methyl-
3-Schiff-hexene-1,1-dimetatool, 3-methylene-1,5-bentanediol, diethylene glycol, (2-human-xyethoxy)-1-glopanol,
4-(2-hydroxyethoxy)-1-butanol, 5
-(2-human Ixip4polifecy)-1-pentanol,
1-(z-w droxyethoxy)-2-hexanol,
1-(2-human-oxyethoxy)-2-octatool,
3-Alioxymethyl-1,5-bentanediol, 2-Alioxymethyl-2-methyl-1,3-propanediol, 3-(o-bubenylphenoxy)-1,2-bupanedio-#, 4.4 '-Isobupylidene bis(p-phenyleneoxy)jethanol, green ktl-l, 1
．． 2.6-Hequinane-triol, l.

1.1-)limethylolethane, 1.1.1-trimethylolethane, 3-(2- and do-I-poxy)-
1,2-prepanediol, 2,4-dimethyl-2-<
2-Hydroxyethoxy)-methylpentanedio-ru 1. Ssl, 1,1-tris((2-hydroxyethoxy)methyl)-ethane, 1,1,1-tris-[(2-
and dolkoxyethoxy)methyl]ethane, 1,1.1-)
9S ((2-human tetraxypamine + V) methyl] propane, dibutypyrene glycol, pentae9)9tol, sorbitol, lactose, alpha methyl glucoside, alpha methyl glucoside,
Novolac resins, phosphoric acid/benzene phosphoric acid, polyphosphoric acids such as tripolyphosphoric acid and butodipolyphosphoric acid, ternary condensation products, capro-di-chthone, etc. The alkylene oxides used to make polyoxyalkylene polyols usually have 2 to 4 carbon atoms. Propylene oxide and mixtures of propylene oxide and ethylene oxide are preferred. The polyols mentioned can themselves be used as active hydrogen compounds.

The preferred class of polyether polyols used in the present invention can be generally represented by the formula:

R [(QCnH, , ), 0H) a [wherein R is hydrogen or a polyvalent hydrocarbon group; 1
is an integer equal to the valence of R (e.g. 5 or 2 to 6
and each n is an integer having a value of 2 to about 200, preferably 15 to about 100].

The active hydrogen-containing material is a polymer of cyclic esters having a reduced viscosity of at least about 0.15, preferably from about 0.2 to about 15 and higher.

Preferred cyclic ester polymers have a reduced viscosity of about 0.3 to about 1O. These polymers are homopolymers or copolymers characterized in that they contain units of the formula: [wherein each R1 is individually hydrogen, alkyl, tetra or alkoxy, I is an integer of 1 to 4, C is an integer of 1 to 4, b is an integer of 0 or violet, x+c is at least 4, and p is less than It is not large, and the entire R8 group contains methyl,
Ethyl, inoptevir, n-butyl, t-butyl, tert-butyl, hexyl, chloro, p-p-mo, ethyl, methoxy, ethoxy, n-butoxy, n-hexoxy, 2-ethylhexoxy, dobutoxy, etc. included〕. Each R1 is individually hydrogen; lower alkyl, such as methyl, ethyl, n-propyl, isobutyl; and/or lower alkyl; chrysanthemum, such as methoxy, ethoxy, propoxy, n
-Butoxy and the like are preferred. Furthermore, it is preferred that the total number of carbon atoms in the 81 substituents does not exceed 8.

In one embodiment, preferred polymers of cyclic esters contain both repeating structural units I and units of the formula: where each R' is independently hydrogen, alkyl, cycloalkyl, aryl, or chloroalkyl. or 2
The two TL1 groups form a cycloaliphatic hydrohydrogen ring having -111K, 4 to 8 carbon atoms, preferably 5 to 611 carbon atoms, with the ethylene moiety of the oxyethylene chain of the unit or more, preferably 1 to 10
]. It is preferred that the repeating units n & t contain 2 to 12 carbon atoms. Examples of R1 groups include: methyl, ethyl, n-propyl, isopropyl, tert-butyl, hexyls, dogsyls, 2-talodiethyl, phenyl, phenethyl, ethylphenyl, cyclopentyl, cyclohexyl, cycloheptyl. Such. R' is hydrogen; in lower alkali (for example) f methyl, ethyl, n-propyl, inopropyl
0-) to the force kl nyl group of the second unit. That is, this linkage does not include a direct bond: 0 between the two carynyl groups.

On the other hand, cyclic ester polymers with relatively low molecular weights, such as those with a reduced viscosity of about 0.3 or less, are characterized in that their terminal groups can be hydroxyl or carboxyl. Cyclic ester polymers having an average molecular weight of about 500 are preferred for use herein.

The production of cyclic ester polymers is described, for example, in U.S. Pat.
No. 021,309 to No. 3,021.317 111
It is well supported by the patent literature of No. 3,169,945 and No. 2,962,524. Briefly, the method comprises at least iml of cyclic ester-
with or without a functional polymerization initiator, such as the polyols described above or the polyols described in the patent specification, and a suitable catalyst, the catalyst comprising: Selection is made depending on whether a polymerization initiator is present or not. Suitable cyclic monomers that can be used to make cyclic ester polymers are best represented by the following formula: ? [In the formula, R8, M e X * C and b are the units I
]. Representative cyclic ester monomers contemplated include, for example, delta-valerolactone;
ipsi-4-capulactone, zeta-enanthactone; and alkyl delta-lactones, such as methyl-1-ethylene and monohexyl-delta-parenthyl lactone. In the absence of added functional polymerization-initiators, the polymerization reaction takes place under effective conditions and as described in Zhu Guo Patent Nos. 3,021,309 to 3,02.
It is preferable to carry out the reaction in the presence of a monoanionic catalyst as described in each specification of No. 1,317. When reacting a mixture of cyclic ester monomers and a functional polymerization initiator having at least one active hydrogen substituent, such as carboxyl or humanorexyl, Chapter 5141 § 2.878
．． No. 236, No. 2,890,208, No. 3,169,
No. 945 and No. 3,284,4171, it is desirable to use the catalysts described therein under the effective conditions discussed therein. Suitable polyol polymerization initiators and polycarbonate polymerization initiators are described in U.S. Pat. No. 3,169,94.
5, and those in the patent specifications listed above, as well as the polyols and polycarboxyl compounds listed above.

Cyclic ester polymers are also described in U.S. Pat.
It can be produced by the method described in the specification of No. 24.

Cyclic ester/alkylene oxide copolymers also contain a cyclic ester monomer, an alkylene oxide monomer, a surfactant, such as a solid, relatively high molecular weight poly(Bierstearate) or lauryl methacrylate/Bierk. A mixture containing a tetralide copolymer (equivalent viscosity in cyclohexanone at 30° C. of about 0.3 to about 1.0
) at elevated temperatures 1. For example, it can be prepared by reacting at about 80° C. for a sufficient time to form the cyclic ester J//alkylene oxide copolymer.

When prepared from mixtures containing cyclic carbonates and cyclic ethers such as alkylene oxides, oxetanes, tetrahydrofurans, etc., the polymer chains of the resulting copolymer products are repeatable. When the comonomer is an alkylene oxide, the resulting copolymer product contains both repeating linear units I and repeating linear units II in its monopolymer chain. The linkage between the linear unit I and the linear unit (2) does not involve or involve a direct bond of two oxy groups, ie, -0-0-. In other words, the oxy group <-0- of the repeating linear unit (2) is bonded to the carbonyl group of the repeating linear unit I or to the second oxyalkylene unit (the alkylene portion of ID).

The cyclic ester polymers described above are useful in producing polycrethane products having relatively high strength and elongation.
, the intended cyclic ester polymer is expressed by its reduced viscosity value. As is well known in the art, the reduced viscosity value is a measure or indication of the molecular weight of the polymer. It is the value obtained by dividing the specific viscosity by the concentration of the polymer in the solvent used. The specific viscosity is obtained by dividing the difference between the viscosity of the solution and the viscosity of the solvent by the viscosity of the solvent.

Unless otherwise specified, the reduced viscosities used herein are those measured at 30° C. at 0.290 °C of the polymer in a solvent (such as a common organic solvent such as cyclohexanone, benzene, chloroform, toluene or a twist thereof) iooWJ. It is.

Another type of active hydrogen-containing material useful in the present invention is British Patent No. 1.06, incorporated herein by reference.
No. 3.222 and U.S. l1II & Patent No. 3,383°351
No. 5, as described in each specification, is a heavy metal body/polyol composition obtained by polymerizing an ethylenically unsaturated monomer in 117ol. Monomers suitable for preparing such compositions include acrinitrile, vinyl chloride, styrene, butadiene, vinylidene chloride and its derivatives, as described in the aforementioned British and unpatent patent specifications. There are monomers that are ethylenically unsaturated. Suitable polyols include those mentioned above, and the British! ! Patents and rice! 141, which are described in each specification. The polymer/polyol composition contains from about 1 to about 7 monomers polymerized in the polyol.
It may contain 0 parts by weight, preferably about 5 to about 50 parts by weight, and most preferably about 10 to about 40 parts by weight. Such compositions are prepared by treating the monomers in a selected polyol at a temperature of 40°C to 150°C in the presence of free radical polymerization catalysts, peroxides, persulfates, percarbonates, perborates and azo compounds. It is conveniently prepared by polymerizing with and. Details of this composition and manufacturing method can be found in the above article.
4I patent and US patent specifications.

The resulting composition is believed to be a miscellaneous mixture including free polyol, free polymer, and graft polymer/polyol composite. Manufacture l of said British patent specification is Il! tVC is preferred.

Mixtures of the active hydrogen-containing compounds can be used as reactants with polyisocyanates to produce polyurethanes. For example, mixtures of diols such as propylene glycol, polymer/polyol compositions and cyclic ester polymers can be used. Examples of such mixtures include mixtures of polyether polyols; mixtures of polymers/polyols, dipropylene glycol and cyclic ester polymers; mixtures of polyether polyols, dipropylene glycol and polymers/polyols; Examples include mixtures of polyols and pyrene glycol.

Preferably, the polyol is selected from castor oil, polybutadiene polyol and ethylene oxide terminated polyether polyol.

The polyol has an isocyanate index of about 70 to about 1.
50. Preferably, an amount of from about 90 to about 120 is used with incyanate.

Isocyanates suitable for use in the present invention have the following characteristics: liquid between about 20°C and about 40°C; a viscosity of less than about 2000 centipoise measured between about 20°C and about 40°C; (number of NCO groups per molecule) equal to or greater than about 2; if a polyol and catalyst are used,
These can be cured at a temperature of about 5 to about 40°C to form a film with a thickness of about 10 tons with no residual tack within about 5 hours; It is miscible with polyols.

The isocyanate includes any suitable polymeric incyanate composition. This k includes one or more such isocyanates. Examples of polymeric isocyanates include Seeger (8ee), published on July 31, 1954.
ger) et al., US Pat. No. 2,683,730, the entire disclosure of which is incorporated herein by reference.

Representative polymeric incyanates are of the formula: where 8' is hydrogen and/or lower alkyl, such as methyl, ethyl, prevyl and butyl.
. The preferred polymeric isocyanate defined by 2 is n
' is in the range of 2.1 to 4.0, 3/.

is hydrogen and/or methyl.

A suitable polymeric incyanate for 41 is polymethylene polyphenylisocyanate) (i.e. 8' in 2).
They are commercially available under the trademark “PAPI”. These usually have an average NCO of
Sensuality is 2.2-3.5, generally 2.3
~3.0 in the form of a polyisocyanate mixture. Of course, the terms "polymeric incyanate" and "polymethylene polyphenylisocyanate" are used in this specification.
includes mixtures containing one or more such polyisocyanates. Further details regarding polymeric isocyanates and their preparation can be found in the Seeger et al. patent specifications. Also suitable for use herein are 2,4- and 2,6-tolunin diincyanates and mixtures thereof. rice ii 1% allowance 3rd,
No. 384,653 describes Ejl's liquid methylene bis(
phenyl isocyanate)) i4=4'-methylenebis(
phenyl isocyanate; z-4'-methylenebis(phenylisocyanate), 4.4'- and 2.4
′-Methylenebis (mixture of phenyl isocyanates;
Crude 4.4'-methylenebis(phenylisocyanate)
6 isomers of xylene isocyanate and mixtures thereof; 7
isomers of ethylene diisocyanate and mixtures thereof; isomers of ethylene diisocyanate and mixtures thereof; substituted methylene bis(phenylisocyanate) (substituents include, for example, 3-alkoxy, 3,3'-dimethyl and
．． 3/-dimethoxy); substituted 2.6-) luene diisocyanate [substituents include p-methoxy, p-1-propyl, p-CN, p-methyl, p-C0-alkyl,
p-N (alkyl #), ); halogenated incyanate,
For example, serafluro 2,4-toluene diisocyanate, monochloro 2,6-)toluene diisocyanate; terphenylisocyanate: for example 4,4', 4'
-) Diisocyanato metaterphenyl i4.4'-diisocyanatodiphenyl oxide, 464'-'/isocyanatodi7er sulfide, 4.4'-diisocyanatodiphenylethylene-1,2,4,4'-diincyanatonaphthalene disulfide and 4-isocyanatophenylsulfonyl isocyanate; aliphatic isocyanates: e.g. 3-incyanatomethyl-3,5,5
-trimethylcycIhexylisocyanate)il, 6-
Hexamethylene diisocyanate 11.4-tetramethylene diisocyanate; 1.4-butylene (-2-) isocyanate diisocyanatocyclohexane; triisocyanatocyclohexane.

U.S. Patent Nos. 3,493,330 and 3,470,2
Norbornane diisocyanate described in each specification of No. 48; bis(2-incyanatoethyl) 7 malate described in U.S. Pat. No. 3,579,482; U.S. Pat. No. 3
Polyoxyalkylene diisocyanate 3 US 114I Patent No. 3゜455.88 described in , 370,077
Dimerized fatty acid diisocyanate described in No. 3; 1.2- as described in U.S. Pat. No. 3,539,611
Bis(p-(2-isocyanatoethyl)phenyl-1-
Isocyanatomethylethane; U.S. Patent No. 3,455,9
1,4-bis(isocyanato)- described in specification No. 81
1-phenyltetrahydronaphthalene; hydrogenated aryl incyanates, such as 2,4-(p-isocyanatocyclohexylmethylene)-1-incyanatosyphtetrahexane, 4,4'-diisocyanatodicyclohexylmethane; 2,3- Bis(difluoroamino)-1,4
-diisocyanatobutane; 4,4'-bis(2-incyanatohexafluoropropyl)diphenyloxide;
Acylated urea polyisocyanates as described in U.S. Pat. No. 3,383,400; U.S. Pat. No. 3,350,4
Biuret polyisocyanates as described in US Patent Application No. 38; silicon-containing polyisocyanates as described in US Pat.

Brepolybenzenes derived from the following can also be used in the present invention: the diisocyanates described above and the glycols in which the molar ratio is greater than about 3=1; and polyol and NC
wherein the O@OH molar ratio is about 7:1; the aforementioned polymeric incyanate and polydio-enzyme and NCO! The OH ratio is about 7:1 or more.

In the present invention, polymeric isocyanates are preferred.

This is due to the following reason. namely, low viscosity; sufficient compatibility with polyols with low vapor pressure; flame retardant due to aromatic structure; high rigidity and strength due to aromatic structure; low price and low toxicity. . More preferred are heavy metal isocyanates with a high ortho content because they are more miscible with polio-★ and have better color than polymeric isocyanates with a high para content.

Isocyanate is co-used with polyol K, Neo S
OH molar ratio is approximately 0.70:1.50. Preferably about 0.
9=1.20 is used.

Any chemical compound can be used in the compositions of the present invention.

Examples include coid silica, hydrogenated castor oil, and bentonite clay. Preferred chicken tropes are hydrogenated and mustard oil. The amount of thixotope used is 10011 polyols by weight! from about 1 to about 15 parts, preferably from about 2 to about 10 parts.

When using a catalyst in the composition, various urethane producing catalysts can be used. Catalysts having the following properties are preferred. That is, it has high activity for the reaction between isocyanates and organic hydroxyl groups; low activity for the reaction between isocyanates and water; high solubility in polyols of ~1; after mixing the catalyst with the foam; The viscosity increase can be greatly retarded; at temperatures of about 5 to about 40°C, the catalytic effect is briefly delayed (from about 30 seconds to about 12
A delay time of 0 seconds is preferred): greater degree of lacquer dissolution into the diluent.

These catalysts include: dia-λ-tin carboxylates, such as diptyltin silaclate;
dioleate, diacetate, or di-2-ethylhexoate, etc.; dimethyltin dithiolacrate, stannous octoate, stannous oleate, calicum octoate, potassium acetate, phenylmercury brevionate, iron (
W acetylacetonate F1 steel (If) acetylacetonate, zinc octoate, zinc acetate, cobalt acetate (I
I), manganese acetate (■), isopropyl titanate,
Triacryl isopropyl titanate, lead tin 7tanate, haltonaphthane F, bismuth nitrate, iron chloride (■)
, sodium silicate, arunium acetylacetonate, zinc acetylacetonate, nickel (n) acetylacetonate, methylthi, tanate and zinc stearate.

Catalysts useful for 41 have tin-sulfur bonds, such as diptyltin sulfide, and dialkyltin dithiodialkylidene diesters of the formula: [wherein R1 and B are independently carbon atoms] l to about 20
d is an integer from 1 to 8, and d' is an integer from 1 to 1G].

In the above formula, preferably R1 and R1 are carbon atoms 1 to 8
alkyl, and d is an integer from 1 to 4.

Tertiary amines can also be used as catalysts. These tertiary amines can be represented by the following formula: where R, R, and R independently represent aryl, alkylaryl, alkyl, alkyl, tetraalkyl, and alkenyl groups. (wherein each aryl, alkylaryl, and alkyl group contains about 6 to about 20 carbon atoms, the alkyl group contains 6 to 18 longitudinal atoms, and the alkenyl group contains about 6 to about 20 carbon atoms, and the alkenyl group contains about 6 to 18 longitudinal atoms) a' is an integer from 1 to 5] .

or an optionally substituted l-functional hydrocarbon group, and e is O to 10]. Examples of optionally substituted hydrocarbon groups include morpholinoalkyl; piperidinoalkyl; alkyladenoalkyl; hydroxyalkyl; alkoxyalkyl and alkylcarbonyloxyalkyl. These triazine-containing compounds are described, for example, in U.S. Pat.
No. 884.917, which is well known in the art.

Amines suitable for use in the present invention include nitriethylenecya, N,N-dimethylcyclohexylamine, triethylamine, N-ethylmorpholine, N-methyl-2,2-') Jay+Lou 1.3
-Oquinasiridine, N-furkylpiperazine, N, N/
-Dialkylpiperazine, tetramethyl-1,3-butanesiatone, dimethylethanol, bis-dimethylamino diethyl ether, imidazole, N, N/,
N'-tris(3-dimethylannobyl)-8-hexahydrotriazine.

It is also possible to use mixtures of the aforementioned catalysts.

Catalysts are used in amounts as low as 0.01 parts to about 0.50 parts by weight, based on the weight of the polyol.

The amount of catalyst used depends on the temperature of the foam into which the catalyst is injected, the amount and alkalinity of filler present, the reactivity of the polyol, and the temperature of the substrate to which the foam is applied. For example, if the foam temperature is about 40°C and the substrate (e.g., wall panel) temperature is about 25"C, a catalyst such as dialkyltindithioalkylidene is used in an amount of about 0.1 part. The temperature of the foam is below about 40°C;
If the substrate temperature is below about 25°C, polyol 10
More than 0.1 parts by weight of catalyst per 0 parts, and 0.50 parts by weight
Larger amounts, such as parts by weight, may also be used.

The catalyst is added to the general K11 agent. This solvent can be selected from a wide variety of substances. The solvent may be, for example, a polyol or a polyol as described above, or a surfactant as described below, or an opaque agent such as sialyl phthalate. Generally, the catalyst is dissolved in about 10 to about 100 parts of solvent per catalyst III.

The catalyst can be mixed with a solvent and the mixture added to and mixed with the foam. When the catalyst is added in this manner, it is dissolved in the solvent. This indicates the preferred method of adding catalyst. Alternatively, a relatively large amount of a catalyst insoluble in the polyol, such as a bismuth-containing and silicate-containing catalyst, 41 KBi (NO, ), and 810 g of Nag, is mixed into the polyol and later added to the polyol, such as ethylene glycol, propylene glycol, etc. Solubilization can be achieved by adding simple glycols, or glycerin, or mixtures thereof. Since the catalyst is insoluble in the polyol, no gelation occurs in the hose applying the foam. If the catalyst is dissolved in the polyol and added to the polyol package, gelation will occur within the processing equipment and block it.

The compositions of the present invention may optionally contain one or more of the following ingredients: surfactants, moisture scavengers,
Fillers, flame retardants, dyes, pigments, etc./surfactants are described, for example, in US Pat. No. 3,772. ,? =? No. V and No. 4,
The organosilicon copolymers described in US Pat. No. 022,722 are preferred.

Another organosilicon surfactant is a partially machined siloxane-lioxyalkylene block copolymer and mixtures thereof, where the polyoxyalkylene blocks are silicon-carbon bonds or silicon-acid bulk copolymers. Bonded by one-carbon bonds. This ship
The xantholytic group consists of a hydrocarbon-cypxane group, and the block bonded to the bond has at least a divalence of silicon. At least a portion of the polyoxyalkylene block consists of an oxyalkylene group and is polyvalent. i.e. block fishing carbon and/or
or has at least two valences of oxygen bonded to carbon. The remaining polyoxyalkylene blocks are composed of oxyalkylene groups and have a monovalent valence. That is, l of carbon or oxygen bonded to carbon per bootk bonded to the bond.
It merely has a valence.

Additionally, conventional organopolysiloquinane polyoxyalkylene polymers, such as U.S. Pat.
No. 4,748, No. 2,846,458, No. 2.868
, No. 824, j11! , No. 917,480, and No. 3
, 957,901 can be used.

Honji F! Surfactants of the AK type that can be used include high molecular weight linear non-hydrolyzable (M)n Vvx surfactants such as those described in unlit patent no. It is a polyoxyalkylene putta copolymer.

These block copolymers described in U.S. Pat. No. 4,022,722 have the following average formula:
', 4 independently represent monovalent hydrocarbon bulk groups containing no aliphatic unsaturation, n is an integer of 2 to 4, C' is an integer of at least 6, and f is an integer of at least 4. , g is an integer of at least 4, and B represents a dodecvalent organic group bonded to the S* silicon atom by a carbon-silicon bond and to the polyoxyalkylene boot stock by an oxygen atom, provided that the molecule one Y group is present], and the average molecular weight of each siloxamp is approximately 50
0 to about 10.000g each polyoxyalkylemp p
The average molecular weight of the blocks is from about 300 to about 10,000; the siloquinone blocks make up from about 20 to about 10,000 SO weights of the copolymer; the polyoxyalkylene blocks make up about 80 to about 10,000 SO weights of the copolymer and the average molecular weight of the block copolymer is at least about ao, ooo
It is.

The surfactant is polyol 100,116 sl to about 1 sl.
0. Preferably, it can be used in an amount of about 1 to about 4 parts by weight.

Hygroscopic materials that can be used in the present invention include the following: silicates such as ethyl silicate, oquinazolidines, carboxyimides, inorganic materials such as Magnesium sulfate, calcium sulfate, calcium chloride and any inorganic salts thereof that are hydrated with water. Curular sheep is preferred. The wet material can be used in an amount of about 1 to about 15, preferably about 3 to about 7 parts by weight of Polio-#1001S.

Suitable fillers that can be used include, for example, sulfuric acid, calcium carbonate, and trihydrate.
Fillers with low wettability are preferred. In this real IJi, the filler can have a catalytic effect.

Fillers can be used in amounts up to about 250 parts by weight, preferably from about 100 to about 200 parts by weight per Polio-J&10011.

If it is desired to produce a hard cured polyurethane foam, a flame retardant can be added to the composition.

Suitable flame retardants include alumina trihydrate; phosphorus-containing compounds, including, for example, tricresyl phosphate-1; and halogenated phosphates, including, for example, tris(dichloropropyl) phosphate.

In the practice of this invention, the density of the uncured foam is approximately 18
The density of the foam is approximately equal to the density of the foamed polyurethane formed.

The components of the composition are selected such that the amount of water in the composition is less than the amount that will cure the composition into a foamed polyurethane having a density that is not substantially the same as the density of the foamed composition. The composition of the present invention forms a foamed polycrethane that is essentially free from secondary foaming.

The moisture content of the composition can be made as low as possible by ensuring that each component does not introduce significant amounts of moisture into the composition. This is achieved, for example, by choosing a polyol with the lowest possible average human-xyl number (low hygroscopicity) and by choosing an isocyanate that can be cured with the polyol in the shortest possible time. A urethane forming catalyst can be added to speed up the degree of cure.

Hygroscopic substances can be added to the composition, such as polyols with high droxyl numbers or high WkIl properties. In this way, by relating each component,
It can be seen that a composition with the lowest water content is obtained.

Although the following examples specifically illustrate the practice of the invention, they are not intended to limit the scope of the invention in any way.

In the examples below, foams were prepared using the equipment shown in Ill and I12.

Example 1 Boupylene oxide adduct of castor oil 57.7 bond, 80/2 G mixture of sorbitol and propylene glycol, with a toxyl value of 49 G
14.4 bond, a thixotrope, i.e., hydrogenated castor oil 4,3 bond, and a compound having the formula (B)n, where M is dimethylsilicate;
is a block of oxyalkylene units, and n is larger than 20) (hereinafter referred to as surfactant).
Bond, 72.1 lbs. of Flumina trihydrate and 2.2-di/a*-1*3-propanediyltetrakis (
A polyol package was prepared by mixing 2-[mu]loethyl)phosaate flame retardant 72.2 bond in a closed 1 gallon container under a nitrogen atmosphere.

The ingredients were mixed until the temperature reached 60'' cK, at which point it was cooled under a nitrogen atmosphere.

The material is then heated under pressure (approximately 30-70 ps) with nitrogen.
i back pressure) was fed to a K8KG continuous mixer.

Nitrogen was fed into the polyol tube just before the stream entered the continuous sexer. A stoichiometric amount of cased polymethylene polyphenylisocyanate was also pumped through another conduit into the continuous mixer by a Zenith pump. The resulting foam was passed through a 8 foot long, 1/2 inch inside diameter hose into a static mixer [starter tube (8tata Tub) 20-66, apparent diameter 3
A inch long, 2214 inches long]. Immediately before the R-terminator, in a polyol consisting of an adduct of glycerin with a hydroxyl value of 24 G, the formula (where B and R8 are -CH, n is equal to 2, m is an integer from 1 to 10) [UL-
24゜Light Co., Ltd. (Wttc.

Chemical Company)] was injected at a rate of 0.1 weight of Polio-J/100 parts by weight catalyst using a 5-weight metering pump. The catalyst was dispersed into the foam by passing through a static mixer. The catalyzed foam was deposited onto the wallboard joint and spread with a steel blade to form a smooth seam. The density of the foam was 32 bonds/cubic foot. The seamed joints were cured vertically at a temperature of 26°C and a relative humidity of 90°C. Sagging (61 gg 1 mg) and secondary foaming did not occur. The foam reached the gel stage within 33 minutes and the blade could be drawn over the scissor surface without damaging the iron surface within 45 minutes.

Example i A polyol package with the following components: 5400 g of a polyol consisting of a propylene oxide adduct of glycerin with a human tetraxyl number of 3 G capped with ethylene oxide and with a hydroxyl number of 27, 600 g of ethylene glycol, and 300 g of hydrogenated castor oil. The procedure of Example 1 above was repeated except that 3A Molecuy-2-Sheep 3009 and 60 g of the surfactant of Example 1 above were prepared.

A foam was prepared according to the procedure described in Example IK above. The foam was deposited onto the wallboard joint and spread over the axillary joint with a steel blade to form a smooth seam. The density of the foam was 32 pounds per cubic foot. The assembled joint was directly cured at a temperature of 26° C. and a relative humidity of 90≦. No 11 sagging or secondary foaming occurred. The foam reached the gelling stage within 28 minutes and the blade could be pulled over the surface within 50 minutes without damaging the surface.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of a flowchart 11 according to a preferred embodiment of the present invention. FIG. 2 is a side view of containers 29 and 30 of FIG.

Claims (1)

Claims: (1) Separate sources of polyol, isocyanate, catalyst, and inert gas and the supply of the polyol, incyanate, and inert gas separately and under pressure at controlled flow rates; means including separate conduits supplying the polyol, isocyanate F and an inert gas from a source to a mixing device having inlet openings for receiving the polyol, isocyanate F and an inert gas; means for producing a catalyst and an outlet opening for the foam obtained; means for conveying the foam from said mixing device to a second mixing device; and a conduit for supplying said second mixing device to! Means for mixing the armpit foam and the catalyst, the mixing device comprising an inlet opening for receiving the armpit foam and the catalyst, an outlet opening for the produced catalyzed foam, and Apparatus for the continuous production of curable polyurethane foam, characterized in that it comprises: means for delivering a scissors-catalyzed foam from said mixing device onto a substrate. (2) The apparatus according to claim 11, wherein the source of polyol is a container containing a bisfluoride that creates pressure on the polyol. 2. The apparatus of claim 1, further comprising: (2) a source of solvent and means for supplying said solvent under pressure to a mixing device. (4) An apparatus according to claim (2) for maintaining the solvent under pressure in the source.