MXPA99010639A - Curable sealant composition - Google Patents

Abstract

A UV curable, flexible, paintable composition is disclosed. The disclosed composition has enhanced durability, thick and thin film adhesion, resistance to mold growth and dimensional changes while reducing solvent emissions. The disclosed composition reduces, if not eliminates, runs and drips during the thermal bake cycles which are associated with using conventional compositions in automotive applications.

Description

CURABLE SEALANT COMPOSITIONS Field of the Invention The present invention relates to a novel composition, to methods for applying the composition as well as to the final uses of the cured composition.

Background of the Invention Sealers are used in a wide range of applications. In the automotive industry, the seals are placed between and on the seams or joints and the metallic welds, inside hollow cavities, to impart structural and sound damping characteristics, among other places. An example of an automotive sealant is used over the welds in the so-called "roof channels" which are formed when the side panels of the body are joined to the roof. The welding of the roof channels is conventionally covered with a polyvinyl chloride (PVC) based molding strip which is typically covered with a metal strip and painted. The PVC strip typically contains REF. 32108 plasticizers, stabilizers, lubricants, among other compounds that can volatilize from the strip, causing fractures and shrinkage. When the PVC strip is broken this reduces the effectiveness of the strip and in turn allows the underlying metal to corrode. Conventional sealers, including those used in roof channels, can also create conditions in which they are conducive to the growth of microbes, especially fungi; especially in hot humid environments. The growth of microbes occurs because the sealer contains substances that can be metabolized by microbes. Accordingly, there is a need in the sealing industry for a sealer with improved durability, and resistance against microbes and cosmetic value, which can be applied in a convenient manner. There is also a need in this industry for a sealant that can be repaired or replaced. Methods for applying and curing / heating coatings are described in U.S. Pat. Nos. 4,844,947 (Kasner et al.), 5,348,604 (Neff) and 5,453,451 (So ol). The description of the patents identified previously is incorporated herein for reference.

Brief Description of the Invention The present invention solves the problems associated with conventional practices by providing a radiation curable composition, which can be used as a sealer that is easy to handle, that is durable, paintable, repairable / replaceable, resistant to fractures and microbes. The present composition can be used in a wide range of end uses including in the automotive industry, for example, as a sealing agent for roof channels. The composition of the invention can be applied using commercially available distribution equipment, for example, for spraying or pumping, and in-situ curing by a source of UV radiation. If desired, the composition of the invention can be painted. The inventive composition comprises or consists essentially of at least one epoxy, at least one polyol, at least one thickener or filler, one or more suitable photoinitiators and optionally at least one monomer and / or phenoxy resin.

Brief Description of the Drawings Figure 1 is a schematic drawing of an apparatus which can be used to apply the inventive composition using robotic means. Figure 2 is a schematic drawing of the apparatus illustrated in Figure 1 when the composition is applied.

Detailed description The inventive composition comprises or consists essentially of 1) at least one epoxy such as that provided by UCB Radcure as Uvacure 1500, 1530, and 1534 or by Sartomer as SARCAT K126, 2) at least one and (optionally two or more) normally two. polyols such as polyester polyols supplied by Union Carbide as Tone 0301 and by Huís America as Dynacoll 7110, optionally 3) at least one thickener or filler such as silicon dioxide supplied by Cabot Corporation; and 4) at least one photoinitiator such as the sulfonium salt supplied by Union Carbide as Cyracure UVI 6974 and by Sartomer as CD1010; and optionally 5) at least one monomer such as TONE M-100 also supplied by Union Carbide, a mixture of hydroxy polyester acrylate / hydroxylethyl acrylate or a monomer such as caprolactone acrylate supplied by Sartomer, and optionally 6) at least one phenoxy resin such as phenoxy resin such as paphen phenoxy resin PKHP 200 supplied by Fenoxi Specialties. Although any epoxy or mixtures thereof can be applied in the composition of the invention, a liquid cationic curing epoxy such as a cycloaliphatic epoxy is desirable. Normally, the epoxy corresponds to about 40 to about 90% by weight, and preferably about 45 to about 60% by weight of the composition prior to curing. Without wishing it to be limited to any theory or explanation, it is believed that the inventive composition employs a cationic reaction, which can be photoinitiated, continuing as a cascade reaction; Especially if it gets hot. It is also believed that when the composition of the invention is exposed to a radiation source / UV light, a relatively thin outer layer is formed substantially instantaneously on the surface of the composition. The outer surface layer serves to stabilize the shape of the composition until the rest of the composition has reacted, for example, has been crosslinked, in a self-supporting structure. The thickness of the outer layer as well as the resulting article can be adapted to satisfy a particular end use, for example an article having a thickness from about 0.05 to about 10 mm as well as the formation of an outer layer on an uncured underlying material. . The effectiveness of the epoxy mentioned above is improved by the presence of at least one polyol. By using two or more polyols (in combination with at least one epoxy), the properties of the composition of the invention can be adapted. Examples of properties that can be adapted or adjusted include vitreous transition point, viscosity, adhesion to the underlying substrate (e.g., in the case of a roof channel the automotive E coating), the degree of crosslinking in the Cured composition, flexibility, among the other desirable properties. The amount of the polyol in the composition prior to curing ranges from about 5 to about 30% by weight. Although any suitable polyol can be employed, examples include polyether polyols and polyester polyols such as those commercially available from Union Carbide, Huís America and Arco. The ratio of the epoxy to the polyol can vary from about 1: 1 to about 2: 1.

At least one thickener or filler may be included as a component of the composition of the invention. The amount of the thickener typically corresponds to about 0.5 to about 5.0% by weight of the composition prior to curing. Although any suitable thickener may be employed, the fumed or aerosil silica may be used to obtain desirable results, for example, the fumed silicas commercially available from Cabot Corporation (M-5 Grade) and Degussa. Normally, precipitated silica is not used. The thickener is typically non-reactive and is employed to create a thixotropic fluid, for example, having a viscosity of about 20,000 to about 80,000 centipoise. Accordingly, the thickener can be blended into the composition in any convenient manner, for example, added to the polyol and mixed under vacuum. If desired, the thickener may comprise a treated silica such as a silica having a silane surface treatment, for example, TS720 supplied by Cabot Corporation. The aforementioned photoinitiator is used to induce the interaction between one or more components of the composition of the invention, for example, epoxy and polyol. The amount of the photoinitiator typically corresponds to about 0.5 to about 2% by weight of the composition prior to curing. Although any suitable photoinitiator or mixtures thereof may be used, desirable results have been obtained using a sulfonium salt, triarylsulfonium hexafluoroantimonate, diaryloyl hexafluoroantimonate, and mixtures thereof among others. In one aspect of the invention, the photoinitiator is partially or completely replaced by an acid such as at least one element selected from the group consisting of a suitable Lewis acid such as at least one element selected from the group consisting of sulfonic acids, phosphoric, citric acid, carboxylic acid, tannic and oxalic acids, and mixtures thereof, among others. Normally, the best results are obtained using a source of phosphoric acid. In this aspect of the invention, the composition is employed in a two component system wherein the epoxy and the acid are kept separate until it is desirable to produce a self-supporting coating or an article. The epoxy and / or the acid can be mixed with other components of the inventive composition, for example, the acid can be mixed with a polyol. When the epoxy and the acid are contacted, a reaction occurs that is substantially similar to that described herein when a photoinitiator is exposed to UV radiation. The amount of the acid normally corresponds approximately to 0.25% to about 3.0% by weight of the composition prior to curing. When employed, the monomeric component of the present invention may comprise at least one element selected from the group consisting of acrylates, caprolactones, mixtures thereof, among others. The amount of the monomer typically comprises about 1 to about 5% of the composition prior to curing. Without wishing to be bound by any theory or explanation, it is believed that the monomeric component functions as a crosslinking agent. In one aspect of the invention, the composition comprises the following: TABLE 1 Chemical Name Registered Name Supplier% in Weight Uvacure Cycloaliphatic Epoxy 1500 UCB Radcure 25-45 Polyester Tone 0301 Union Carbide 0-45 Dynacoll Polyurethane Polyester 7110 Huis America 10-35 Hydroxy Polyester Tone M-100 Union Carbide 10-35 Acrylate / Hydroxyethyl Acrylate Silicon dioxide Cab-O- Sil Cabot r 8. 0 Sulfurium salt * Cyracure UVI 6974 Union Carbide 0.5- 3.0 * 50% by weight of propylene carbonate.

Depending on the inventive composition and the particular end use of a substrate which is coated with the inventive composition, one or more of the following additives may be included in the composition of the invention: epoxy bis-F, thickeners, fillers, surfactants, pH indicators, biocide / antifungal compounds, solvents, fire extinguishers, PVC, PTFE, among other compounds which do not have an adverse effect on curing. When a UV-curable system is used, better results are obtained by avoiding materials that affect the transmission of UV light while the two-component system can include a wider range of materials such as dyes, pigments, UV light stabilizers , among others. If desired, the composition of the invention may include fibers, platelets, particles, among other components to form a composite article. Typically, the amount of such additives will vary from about 1 to about 15 weight percent of the composition prior to curing. Normally, it is desirable to minimize the presence of basic materials and / or those that affect the transmission of UV rays when a UV curable system is employed. The uncured composition can be obtained by any suitable means for mixing or combining the components of the composition. Normally, at least one of the epoxy or polyol will be heated to a temperature that is effective to increase the rate at which the thickener, eg, silica, can be dispersed.

The bubbles formed during the mixing process can be removed by aspiration by means of vacuum on the mixture. Larger details can be found with respect to the mixing process in the following Examples. The composition of the invention can be effectively applied and cured at ambient temperatures, for example, about 18.33 ° C to about 35 ° C (65-95 ° F), whereby the need to heat the composition during application is avoided. However, in some cases it may be desirable to check and control the curing temperature if the ambient temperatures are extreme. By eliminating the requirement of heat curing, the present invention allows the use of unheated distribution equipment as well as the application on unheated substrates. Although it is not necessary to apply heating to the composition, once applied the UV cured composition can be baked or heated to improve the adhesion of the composition to the underlying substrate. For example, an infrared energy source can be used in combination with a UV lamp. The curing of the inventive composition can be initiated by means of a source of ultraviolet (UV) light. That is, although curing can be initiated by UV light that is naturally present, a human-made UV source is employed, for example, to cross-link the polymer matrix. The source of UV radiation can vary widely such as a lamp mounted above a conveyor, a lamp mounted on a robotic arm, a series of lamps mounted on a transverse bridge located above or adjacent to a robot distributing the composition, among others to the apparatus to supply the UV radiation. After applying the composition of the invention on a suitable substrate, the composition can be exposed to a high yield source of UV light (approximately 2.5 J / cm2 at 365 nm, which can vary with the time of exposure, the distance from the source and the type of bulb), which initiates curing whereby the composition is fixed or frozen as a coating on the substrate. The specific wavelength of the UV light can be adapted to satisfy a wide range of product uses, exposure times and distances from the composition to be cured; but, normally, it varies from a value greater than about 250 to about 400 nm and having an output of about 2.5 to about 4.0 J / cm2. In some cases, it is desirable to employ one or more UV sources that emit different UV wavelengths either simultaneously or sequentially, for example lamps that emit different wavelengths and / or by a type of lamp having a filter. Examples of suitable UV curing systems and lamps are the "D", "S" and "H" lamps of the Model F600 System, all of which are supplied by the Fusion Systems Corporation, Rockville, Maryland. The exposure time of the inventive composition to the UV source is typically from about 1 to about 10 seconds. The specific exposure time can be adapted depending on the distance from the UV source, the intensity of the source, the relative speed between the composition to be cured and the UV source, among other parameters. As described above, the UV source can be supplied by any suitable means such as a UV lamp, conveyor device, such as a Fusion Systems "II" bulb attached to, or associated with, a robot arm which distributes the uncured composition, for example, as a bead or ridge within a roof channel or a spray on a substrate. Accordingly, the inventive composition can be easily employed in conventional manufacturing or manufacturing processes. Typically, a safety box or curtain, which surrounds the UV source, is desirable to minimize any impact on personnel. When the composition is used in automotive applications such as a roof channel, the UV curing step can be followed by a thermal baking, which improves the formation of a permanent adhesive bond to the underlying surface, for example, an electrocoating (Coating E), and improves the final curing of the polymer matrix of the sealant. The thermal baking is typically carried out at a temperature greater than about 171.11 ° C (340 ° C) and less than that which adversely impacts the coated substrate. Although a thermal baking is not required for all applications of the inventive compositions, such thermal baking may improve the adhesion between the inventive composition and the underlying surface, and if desired may be employed in conjunction with exposure to UV rays. The composition of the invention also has the ability to be cured with ultraviolet rays from the sun. Although the sun can be used as a source of UV radiation, the curing time is relatively long compared to curing with UV sources of high / concentrated energy. Examples of applications that employ natural UV curing include the construction / building industry such as roof panel joints for metal construction, seals for ceiling or ceiling light, sealants for concrete / cement, the bonding compound for stone walls ("mud"), among other applications exposed to natural UV radiation. For example, the composition of the invention can be applied to concrete / cement and cured with natural UV light to form a water-proof coating, for example, an interior or exterior foundation sealer and a coating or seal for swimming pools. Subsequent operations to the coated substrate will typically not alter the coating, for example, when the coating is employed as a sealant for the automotive roof channels, the coating will not leak or extend during subsequent manufacturing steps such as painting. The long-term dimensional stability of the cured inventive composition is improved compared to conventional PVC sealing compositions, for example, neither fractures nor shrinkage during exposure to UV and repeated thermal baking or exposures become evident. to the environment. When the shrinkage was measured substantially in accordance with ASTM D2453, the inventive composition had a shrinkage of about 0% when visually measured. The inventive composition is a material that can be painted, highly cosmetic (a so-called automotive Class A). With proper application, the sealant provides excellent smoothness and gloss retention, for example, the sealant of the invention has no adverse impact on the distinctiveness of the image (DOI) of an underlying paint. The composition of the invention possesses an improved adhesion to conventional paint systems such as pigmented and clear systems based on a standard solvent, powder, latex, water-based paints, automotive coatings and mixtures of the same, among others. The composition of the invention also possesses a desirable resistance to the environment, for example, the twelve-month Florida exposure test according to the conventional test methods have proven the durability of the composition of the invention as well as the resistance to growth of molds / mold, fractures and chalk formation. The composition of the invention is also resistant to paint dyeing, fading and fracture as a result of exposure to the Xenon Arc. The chemistry of the composition of the invention allows the composition to be adapted to possess a wide variety of physical characteristics. Adapting constituent relations of composition, the physical characteristics of the cured product will vary from a relatively soft and flexible article to a hard, sand-treatable product. These characteristics can be obtained by varying the weight ratio of the epoxy to the polyol, for example, the ratio can vary from about 2: 1 to about 4: 1. Normally, an increased amount of epoxy will correspond to a harder cured coating. When the composition contains relatively large amounts of polyol, the hardness of the cured coating is reduced during exposure to moisture, for example, Shore Hardness "A" when determined in accordance with conventional measurement techniques varies from about 70 to about less about 95. The presence of relatively large amounts of polyol, however, can improve the adhesion of the composition of the invention to the underlying substrate.

The hardness of the composition can be increased by including a phenoxy resin. Although any suitable hardening resin can be employed, examples of suitable resins comprise at least one element selected from the group consisting of phenoxy resin, solid epoxy (in the particulate form), mixtures thereof, among others. Normally, the amount of the hardening resin corresponds to about 1 to about 9% by weight of the composition prior to curing. Including such a hardening resin, the Shore "D" hardness of the composition, subsequent to curing, can vary from about 60 to about 80. The hardening resin also improves the solvent resistance and moisture of the cured composition. In addition, the viscosity of an uncured composition can be adapted by adjusting the ratio of the silica to the polymer and / or the ratio of the polyol. The viscosity of the uncured composition can also be increased by introducing a solid epoxy in addition to or as a replacement for the aforementioned epoxies. Examples of suitable solid epoxies comprise at least one element selected from the group consisting of bis-Phenol A, a novolac resin, mixtures thereof, among others. The viscosity can be adapted to be similar to paint, or increased to a consistency similar to a grease or paste. The presence of a solid epoxy can also be employed to impart improved moisture resistance. The inventive composition, prior to curing, is about 98.5 to at least about 99.75% by weight of solids, eg, about 99.5% by weight solids. Although the dimensional thickness of the composition of the invention can be adapted to suit a wide range of terminal uses, the composition is usually applied at a thickness of about 0.05 mm to about 10 mm in thickness, for example, in the case of channels for the roof the composition is approximately 5 mm thick. The ability of the composition of the invention to form such relatively thick layers is the opposite of conventional practices and provides a remarkable improvement. Although the composition of the invention is not adversely affected by most solvents, the composition can substantially reduce, if not eliminate, the presence of solvents, for example, the composition of the invention can be essentially free of organic compounds. volatile (VOC). That is, the uncured composition can include from about 0.1 to about 1.0% by weight, usually about 0.5% by weight, of a solvent which functions as a carrier for the photoinitiator, for example, about 0.50% by weight of carbonate of propylene. As described above, the UV cured composition of the invention can be used in a wide range of applications; especially in the automotive field. One such example comprises a sealant for the channels of the roof which is a sealable that can be painted, of Class A. Once the composition of the invention is applied, the composition is cured in situ by a source of UV light. concentrated, for which a curing application "on the line" is allowed. That is, a robotic arm can be a double functional tool, as well as a dispensing nozzle for supplying the composition of the invention in a roof channel as the curing lamp fixed in parallel. Alternatively, the curing lamp (s), for example, one or more UV lamp and infrared rays, may be physically separated but operatively connected to the robot, for example, the lamps are mounted on the top or side of the robot on top of the robot. a support bridge where the movement / operation of the robot and the lamps is controlled by computer. The composition of the invention can be supplied to the robotic arm using any suitable pump such as a reciprocating positive displacement plunger pump., for example, model pump No. 711008. 662-000 of 18.92 liters (5 gallons) supplied by Graco-Inc. In a particular aspect of the roof channel application mentioned above, a plurality of protuberances, studs or mechanical fastening means having a desirable shape, can be located inside and fixed to the bottom of the channel improving the bond between the channel and the UV-cured composition superimposed. When studs are used, the studs can be welded into the channel when the underlying weld forming the channel is formed, for example when the side body panels and the car roof are welded together. Any protuberances within the channel can also be fixed by a suitable adhesive, or by a mechanical fixing means. The specific configuration and the height of the protuberances depends on the application; but, normally, the protuberances are from about 3 to about 7 mm high. These protuberances can be made of any suitable material such as thermoplastics such as nylon, metal, among other materials. When introduced into the channel, the flowable composition of the invention is sandwiched between the protuberances, fills the channel and can form a self-leveling surface. These protuberances can also be used in post-market applications when repairing or replacing a roof channel. The configuration of the roof channel can be adapted to improve the mechanical bond between the channel and the UV cured composition. For example, a channel having a trapezoidal cross section can be employed. If desired, the protrusions or studs described previously may be employed within a configuration of the adapted channel. The composition of the invention can also be applied on non-planar surfaces. For example, the composition of the invention can be used as a car that can be painted of the Class A and a sealant of the joints of the car. Such unions can be on a vertical or horizontal surface. The ability of the composition of the invention to be cured substantially simultaneously after application, allows the composition to be employed on such vertical surfaces. To improve the vertical surface application, the viscosity of the composition of the invention can be increased by adding about 3 to about 10% by weight of the thickener such as silica CAB-0-SIL, polyether polyol, mixtures thereof, among others. In addition, the inventive composition can be used to repair dents and scratches on a painted surface, for example, a car door. That is, the composition can be applied on a surface, exposed to UV light, and, after that, treated with sand when necessary and painted according to conventional methods. Similarly, a two component system can be employed without using exposure to UV light. For example, a two-component system based on an interaction between the epoxy and the acid can be combined, applied on a surface like a gel, allowed to harden and adhere to the surface and, after that, prepared for the paint using the conventional techniques. In some cases, the substrate that is repaired and / or the composition of the invention can be heated to improve adhesion to the substrate. The composition of the invention can be applied on a wide range of substrates. The composition of the invention can be employed in a method for applying one or more coatings on an automotive surface. For example, a car assembly may be immersed within the composition of the invention and, thereafter, cured because it is exposed to UV radiation. Such submerging can be employed, for example, as an improvement or replacement for conventional automotive E coatings. Once cured, the automotive assembly can be painted according to conventional methods. Without wishing to be subject to any theory or explanation, it is believed that the composition can be adapted for application on unpainted surfaces as a protector against corrosion, for example, on a car subcarriage, among other applications. In one aspect of the invention, the composition of the invention can be used as a coating for the braking rotor of the automobile, to impart protection against corrosion. The composition of the invention can be applied by means of an aerosol or spray on the rotor to form a thin film coating. The resulting layer is sacrificed because the layer is consumed or removed when it comes into contact with the brake pad. In a related aspect, the composition of the invention can be used as a protector against temporary corrosion such as on saw blades where friction or other use of the protected article removes the coating. In such cases, it may be useful to add one or more surfactants, for example to less than about 1.0% by weight of the fluorochemical Fluorad FC-171 available from 3M. In another aspect of the invention, the coating of the invention is employed as a Class B paintable coating. For example, the coating of the invention is applied as a spray on a metal substrate such as an automotive body panel. lower to form an anti-peeling coating (so-called stone protection). The composition of the invention can also be sprayed onto the hard substrate of the floor, the roof, among other regions of a car during assembly to improve the acoustic characteristics, among other properties. In another aspect of the invention, the composition of the invention can be mixed, molded, extruded or shaped into an article which is subsequently exposed to UV. If desired, the composition of the invention can be coextruded with another material whereby an article having a UV curable surface is formed. Although a wide range of articles can be formed, an example of such an article comprises automotive moldings. Such automotive moldings can be manufactured and shipped to an automobile assembly plant, or extruded and cured directly on the automobile. In a further aspect of the invention, the composition of the invention is employed as a repair material for automotive coatings, sealants, home applications, among other areas where it is desirable to have flexible, long-lasting, flexible sealers. For example, the composition of the invention can be applied on a substrate, cured with UV and exposed to infrared (IR) radiation for 90 seconds, whereby a seal is formed to repair a fracture in the underlying substrate or coating. The compositions described previously can be modified to obtain a gel consistency by adding a gelling agent. Examples of suitable gelling agents comprise at least one element selected from the group consisting of treated or untreated silica, detergents, polyether polyols, mixtures thereof, among others. When a UV curable composition is used, the gelling agent should not adversely affect UV transmission through the composition. The gelling agent usually comprises from about 0.5 to about 10% by weight of an uncured composition. By using a gelling agent, the viscosity and handling characteristics of the composition of the invention can be improved, for example, the composition can be adapted to have a consistency similar to a mastic or caulking substance. In addition, the compositions described previously can be modified to obtain an acid or UV activated foam. Any suitable chemical or mechanical expansion agent can be added to these compositions. Examples of the suitable chemical or mechanical blowing agent comprise at least one element selected from the group consisting of water, hydrazide, diphenyloxide-4, -disulfohydrazide, hexamethylene diamine carbamate, carbonamide, azocarbonamide, sodium bicarbonate, carbon dioxide, fluorocarbons , encapsulated materials, for example Expancel® supplied by HM Royal; mixtures thereof, among others. The blowing agent typically comprises from about 0.5 to about 10% by weight of an uncured composition. The blowing agent becomes activated because it is exposed to either UV rays or a suitable source of heat, for example, an exothermic reaction between an epoxy and an acid. For example, when a heat-curable composition is employed and such composition is exposed to UV light, an exothermic reaction occurs which in turn causes the blowing agent to swell, thereby increasing the volume of the composition. Similarly, when an acid-activated composition is employed, the heat released when the acid is contacted with the epoxy causes the blowing agent to swell. Although the above description imposes a particular emphasis on the application of the inventive composition within a car roof channel, the composition of the invention can be applied to a wide range of substrates. Examples of suitable substrates include at least one member of the group consisting of metals such as stainless steel, galvanized steel, concrete, cement, glass, wood, among others. In the case of metal substrates, the composition of the invention can be applied to a welded joint including a joint or joint formed by spot welding, wire welding and laser beam welding. The composition of the present invention can be applied to a substrate by any suitable method. Such methods include brushing, submerging, pumping, bathing in a liquid, painting, spraying, among other suitable conventional methods. When the composition of the invention is applied over the weld in a car roof channel, it is desirable to pump the composition towards and along the channel. Because of its low viscosity at 25 ° C (77 ° F) of the composition and the thixotropic behavior, the equipment such as a reciprocating piston pump (positive displacement), a gear pump, a pneumatic tube (such as that supplied by SEMCO), a caulking tube (activated by hand), sprayed with air or without air, squeezable tube, brush, among other commercially available equipment, can be used. The uncured composition can then be further manipulated, for example, pressed or stamped, into a desired finish. The composition of the invention, once applied, is usually cured with a UV light source. This can be done immediately during application to a substrate, or delayed depending on the desired characteristics in the coated substrate. For example, by retarding UV curing the composition can be shaped, or leveled / smoothed to better conform to the underlying substrate. As mentioned above, UV curing can be followed by baking, or the finish is allowed to cure naturally. The sealed joint or the coated substrate can now be painted or otherwise finished. If desired, one or more layers of the compositions which are chemically similar or distinct, can be applied over a cured composition, for example, two or more layers of the UV cured composition can be applied sequentially or used to form a structure laminated A method for applying the composition of the invention is illustrated by the Drawings. Referring now to Figure 1, Figure 1 is a schematic diagram of a robotic means for applying the composition of the invention; especially in automotive applications such as a sealant for roof channels. The robot 10 includes the arm 11 that supports the conduit 12. Examples of the robots include those supplied by Fanuc, Inc., Rochester Hills, Mich., And ABB as ASEA Model 2000. A means to provide UV radiation 13 can be supported. by the arm robotic 11. The operation and movement of the robot 10 and the arm 11 are controlled and verified by commercial computer means (not shown). The composition of the invention is supplied under pressure via conduit 12 to any desired location and virtually in an unlimited array of configurations. The intensity of the light from the means 13 and the flow velocity of the fluid through the conduit 12 are also controlled and verified by commercially available computer means (not shown). More details with respect to a method for applying the compositions of the invention, are shown by Figure 2. Referring now to Figure 2, the conduit 12 is in fluid communication with the nozzle or dispensing means 20. The inventive composition is distributed from the nozzle means 20 and applied on a surface 21 whereby the coating or seal 22 is formed. The thickness and configuration of the seal 22 are determined by the pressure within the conduit 12 and the movement of the arm 11. Substantially immediately after it is distributed, the composition is exposed to the UV radiation from the means of the lamp 13. The means of the lamp 13 and the dispensing nozzle 20 are in a fixed spatial relationship by the connecting means 23 which in turn are fixed to the arm 11. The exposed seal 22 to UV rays, it is at least partially cross-linked or cured, for which a self-supporting seal 22 is formed.

Although the full thickness of seal 22 can not be cured, the cured portion of seal 22 is inadequate to prevent seal 22 from preventing fluid flow. The uncured portions, if any, of seal 22 may become cured during subsequent heat treatments, for example, if seal 22 comprises a channel for the roof, then residual curing will occur when exposed to processes of high temperature paint. The following examples are provided to illustrate, not to limit, the scope of the invention as defined by the appended claims. Unless stated otherwise, the materials and equipment described below are commercially available.

EXAMPLE 1 The inventive composition was obtained by combining its constituents. The following equipment was used to combine the constituents. 1) Hot mixing vessel of adequate volume 189.25-1135.5 liters (50-300 gallons). 2) Mixer (Rotor-Stator, or Scatter Blade, or Double Plane Blade) 3) Vacuum 4) Pump for hot liquid 5) Pump for unheated liquid 6) Weight Scale 7) Equipment for Filling the Container for Shipping (Tube) , Cube, or Drum) Mixing begins by pumping to the mixing vessel of polyester polyol (Dynacoll 7110) at 121.11 ° C (250 ° F). 69.92 Kilograms (one hundred fifty-four pounds) of a secondary polyester polyol (Tone 0301) were added to the mixing vessel. The polyols were mixed until both polyol constituents completely dissolve with each other. The polyol mixture is substantially transparent. The temperature inside the mixing vessel was maintained at 82.22 ° C (180 ° F). 41.15 Kilograms (one hundred thirty-five pounds) of the cycloaliphatic epoxy (Uvacure 1500) are then added to the mixing vessel. When all of the epoxy was uniformly mixed, 1.5 kilogram (3.3 pounds) of the sulfonium salt (UVI-6974) is added. Mixing is continued at a temperature of 82.22 ° C (180 ° F) for 10 minutes. 5.0 kg. (eleven pounds) of silica (Cab-O-Sil) are then added to the mixing vessel. The silica is stirred into the mixture until it is moistened. Then another 5.0 kg is added. (11 pounds) of silica (Cab-O-Sil). Mixing is continued until the constituents of the container are completely dispersed. The mixing is then carried out at a high shear rate under vacuum until substantially no lumps or air bubbles were visible. It was important to eliminate all air bubbles, because they can cause a discontinuity in the supply line during the application to the customer or user, and therefore an undesirable inconsistent supply. When the vacuum application is complemented, the resulting mixture is heated and rinsed with a syrupy consistency. When a batch is cooled and the shear stresses decreased, the mixture thickens to a state close to a gel while maintaining clarity. For best results, containers for storage or shipment must be filled prior to cooling. After the containers are filled and the material is cooled, verifications of the relative density and viscosity must be carried out to ensure batch quality. For best results, and to avoid premature curing of the composition, all storage and shipping containers should be opaque or should be protected from UV sources including sunlight and fluorescent lighting. Such exposure could lead to the start of curing thereby preventing the content from being pumped.

EXAMPLE 2 An inventive composition was produced according to the following method. A mixer of the Ross Model PD2 planetary dispersion of 2.57 liters (2 gallons) is purchased and connected to a Cromolox heater. The mixer of the dispersion is operated at a temperature of 87.77 ° C (190 ° C). 2824 grams of the liquid polyol (Tone 0301) and 888 grams of the solid polyol (7110) are introduced into the mixer and mixed for 10 minutes. Sixty (60) percent (240 grams) of the silica thickener (Cabosil supplied by Cabot Corporation) was introduced into the mixer and the blend was mixed for another 10 minutes. 500 grams of epoxy (Uvacure 1500) and the remaining 40% (160 grams) of the silica were then added and mixed for 10 minutes. This was followed by the addition of 60 grams of the photoinitiator (Cyracure 6974) and 2172 grams of epoxy (UVACure 1500) to the mixer and mixing for 5 minutes. The contents of the mixer were then mixed under vacuum for 10 minutes whereby 4.92 liters (1.3 liters) of the inventive composition are produced.

EXAMPLE 3 222 grams of the polyester polyol (Dynacoll 7110) at a temperature of 121.11 ° C (250 ° F) is poured into a 3,755 liter (1 gallon) can. Approximately 706 g of a second polyester polyol (Tone 0301) were added to the first polyol. The polyols were combined in a Rotor-Stator Mixer. This until both constituents were completely dissolved among themselves. The mixture was transparent at this point. The temperature of this mixture was maintained at 82.22 ° C (180 ° F). Approximately 618 g of epoxy (Uvacure 1500) are mixed with the hot mixture. When all the epoxy was mixed uniformly, 15 g of the photoinitiator (UVI-6974) is added. The mixing was continued at a temperature of 82.22 ° C (180 ° F) for 10 minutes. To the mixture, approximately 50 g of silica (Cab-O-Sil) are added. The mixture is stirred until the silica is moistened in the mixture. An addition of 50 g of silica (Cab-O-Sil) was combined with the mixture while mixing was continued until the silica was completely dispersed. The mixture was transferred to a vacuum chamber and kept under vacuum until all bubbling in the mixture ceased. Approximately 1.89 liters (1/2 gallon) of the composition of the invention was obtained.

EXAMPLE 4 The composition described by Examples 2 and 3 was applied to a metal substrate and cured according to the present Example. An ASEA Model 2000 Robot _ that has a movable arm was used to control the position of a SEMCO Distribution tube. The movement of the arm was controlled by a computer and ASEA program (ABB) Approximately 344.4 g (12 ounces) of the composition of the invention was applied at 2.81 kg / cm2 (40 psig) by means of a Robotic High Flow Gun Pyles that was mounted on a robotic arm. The composition was distributed through a round nozzle, approximately 1 cm in diameter and subsequently cured by means of a UV lamp with obturator (1600 watt lamp) which was also fixed to a robotic arm. A schematic drawing of this system is shown by Figures 1 and 2 mentioned above. The composition of the invention was also applied from the arm of the robot using a pump without Pyles heating of 18.92 liters (5 gallons) (in place of the SEMCO tube), to supply the composition. A "back pull" pistol Model # 12000 was also replaced by the previously identified high flow gun. The gun also included a modified squashed nozzle that applied a tape-shaped stream of the composition on the substrate.

EXAMPLE 5 COMPONENT Registered name Supplier% by weight Cycloaliphatic Epoxy Uvacure 1534 UCB Radcure 87 Poliol Poliol Dynacoll 7250 Huís America 4 Fenoxi PKHM 85 Phenoxy Specialties Resin 4 Silicon Dioxide Cab-O-Sil Cabot 4 Sulfonium Salt Cyracure UVI 6974 Union Carbide 1 The composition was prepared in a Ross DB-2 mixer and according to the following method: 1. Add: 5405 g of 1534 Temp. Mix in 260 grams of at 82.22 ° C Ross Cabosil Mixer at the lowest speed setting. 2. Add: 270 g of PKHM 85 Temp. to 82.22 Mixture duration- 270 g of 7250 ° C te 20 minutes at lower speed setting. 3. Add: 56 grams of 6974 Temp. to 82.22 Mix under ° C vacuum for 20 minutes at lower speed EXAMPLE 6 A UV curable composition comprising the following components was prepared: COMPONENT Registered name Supplier% by weight Cycloaliphatic Epoxy Uvacure 1534 UCB Radcure 87 Polyester Polyol Dynacoll 7250 Huís America 4 Polyester Polyol Tone 0301 Union Carbide 4 Silicon Dioxide Cab-O-Sil Cabot 4 Sulfonium Salt Cyracure UVL_6974 Union Carbide 1 The composition was combined in a Ross mixer and according to the following method: 1. Add: 5405 g of 1534 Temp. Mix for 260 grams at 82.22 ° C 10 minutes Cabosil at the lowest speed setting. 2. Add: 270 g of Tone 0301 Temp. to 82.22 Mix du-270 g of 7250 ° C for 20 min. at a lower speed setting. 3. Add: 56 grams of 6974 Temp. to 82.22 Mix under ° C vacuum for 20 minutes at lower speed The temperature used for mixing in Examples 5 and 6 may vary from about 65.55 ° C (150 ° F) to at least about 87.78 ° C (190 ° F). Acceptable results can also be obtained from the formulations of Examples 5 and 6 containing from about 75 to about 95% by weight of epoxy and up to about 10% by weight of polyol and resin.

EXAMPLE 7 A UV curable composition comprising the following components was prepared: Qty. COMPONENT Registered Name Supplier% Weight Cycloaliphatic Epoxy Uvacure 1500 UCB Radcure 45 Polyol Polyester Tone 0301 Union Carbide 29 Polyol Dynacoll 7250 Huís America 12 Fenoxi Resin PKHP 200 Fenoxi Specialties 5 Polybutadiene Poly BD 605 Elf Atochem 6 Silicon Dioxide Cab-O-Sil Cabot 2 Sulfonium Salt Cyracure UVI 6974 Union Carbide 1 The composition was combined in a Ross DB-2 mixer and according to the following method: 1. Add: 2683 g of 1500 Temp. Mix for 1747 g Tone 0301 at 121.1 ° C for 60 minutes 312 g PKHP 200 at the lowest speed setting. 2. Add: 686 g of 7250 Temp. to 93.33 Mix for 375 g of Poly. BD 605 ° C you 20 minutes 125 g of Cabosil at lower speed setting. 3. Add: 56 grams of 6974 Temp. to 65.55 Mix under ° C vacuum for 20 minutes at lower speed setting. EXAMPLE 8 A UV curable material comprising the following components was prepared: Cant.

COMPONENT Registered name Provider% Weight Uvacure Cycloaliphatic Epoxy 1500 UCB Radcure 73 Polyol Tone 0301 Union Carbide 25 Sulfur Salt Cyracure UVI-6974 Union Carbide 1 Fluorinated surfactant Fluorad FC-171 3M 1 The composition was prepared by combining Uvacure 1500 and Tone 0301 in a mixing vessel. The mixture initially exhibited turbidity. The mixture is stirred until the turbidity disappears and visually appears clear. UVI-6074 and Fluorad FC-171 are added to the mixture. Mixing was continued until the components were completely dispersed, which occurred in approximately two minutes. The mixture was subjected to a vacuum to remove entrained air. The mixture was tested according to conventional procedures and has the following characteristics: Brookfield viscosity 300-400 cps at 20 ° C Shore \ A '- 95 - 100 Shore? D' - > Shrinkage: Zero A desirable feature of this composition is that it can be applied to a substrate by means of spraying, for example, using a commercially available airless or airless spray gun.

EXAMPLE 9 A UV curable gel comprising the following components was prepared: Gel A COMPONENT Registered Name Supplier Quantity% weight Cycloaliphatic Epoxy Uvacure 1500 UCB Radcure 47 Epoxy Bis-F Epalloy 8230 CVC Specialty 10 Resings Polyester Polyol Tone 0301 Union Carbide 36 Sulfonium Salt UVI 6974 Union Carbide 2 Silicon Dioxide Cab-O-Síl TS -720 Cabot 5 Gel A was prepared by mixing the Uvacure, Epalloy, and Tone together in a mixing vessel until the solution was clear. UVI 6974 was added, and mixed until the components were dispersed (approximately 2 minutes). The Cab-O-Sil was added to the mixture to function as the gelling agent, and mixed until substantially lump free. A vacuum was applied to the mixture until substantially all the air was removed (27 mm Hg, 10 minutes).

Gel B COMPONENT Registered Name Supplier Quantity% weight Cycloaliphatic epoxy Uvacure 1500 UCB Radcure 54 Polyester polyol Tone 0301 Union Carbide 38 Sulfonium salt UVI 6974 Union Carbide 2 Silicon dioxide Cab-O-Sil M5 Cabot 4 Texaphor Special Agent Henkel The Gel B was prepared by mixing the Uvacure and the Tone together in a mixing vessel until the solution was clear. UVI 6974 was added, and mixed until the components were substantially dispersed (approximately 2 minutes). The Cab-O-Sil was added to the mixture and mixed until it was substantially free of lumps. A vacuum was applied to the mixture until substantially all of the air was removed (27 mm Hg, 10 minutes). The mixture was similar to a gel, but it was not self-supporting. A gelling agent comprising the surfactant was added to the gel-like mixture. After this, a gel formed rapidly.

Gel C COMPONENT Registered Name Supplier Quantity% weight Cycloaliphatic Epoxy UVACURE 1500 Radcure 87 Sulfonium Salt UVI 6974 Union Carbide 1 Silicon Dioxide Cab-O-Sil M-5 Cabot 3 Polyether Polyol LG 650 Arc 9 The gel C was prepared by mixing the Uvacure and the polyol together in a mixing vessel until the solution is clear. UVI 6974 is added, and mixed until substantially dispersed (approximately 2 minutes). The Cab-O-Sil is added to the mixture and combined until the mixture was substantially free of lumps. A vacuum was applied over the mixture until substantially all of the air was removed (27 mm Hg, 10 minutes). The following Table lists the Brookfield Viscosity Data for Gels A, B and C. { cps, in thousands) measured at 20 ° C using a spindle of the number 6 as a function of the revolutions per minute (RPM) RPM Gel A Gel B Gel C 0.5 436 376 160 1 242 198 98 2.5 118 80 45 5 68.8 44 36 10 41.0 25.2 21 20 25.7 14.6 13.7 50 14.3 7.9 9.2 100 9.58 4.88 5.9 EXAMPLE 10 A UV curable foam having the following components was prepared: COMPONENT Registered Name Supplier Quantity% weight Cycloaliphatic Epoxy Uvacure 1500 UCB Radcure 50 Polyester Polyol Tone 0301 Union Carbide 40 Blowing Agent Expancel DU551 Nobel 9 Mechanical Sulfonium Salt UVI 6974 Union Carbide 1 The above components were combined as follows. The Uvacure and the polyol were added together in a mixing vessel and mixed until the solution was clear. UVI 6974 was added to the mixture, and mixed until substantially completely dispersed (approximately 2 minutes). The Expancel spheres were added to the mixture and mixed until they were substantially free of lumps. For best results, a minimum amount of mixing and shearing time was used.

EXAMPLE 11 A UV curable composition comprising the following components was prepared: COMPONENT Registered Name Supplier Quantity% weight Cycloaliphatic Epoxy Uvacure 1500 UCB Radcure 31 Epoxy Bis-F Epalloy 8230 CVC Specialty 11 Resings Polyester polyol Tone 0301 Union Carbide 33 Polyester polyol Dinacoll 7110 Huís America 21 Sulfonium Salt UVI 6974 Union Carbide 2 Silicon dioxide Cab-O-Sil TS-720 Cabot 2 This composition was prepared by heating the Uvacure, Epalloy, Dynacoll, and Tone together in a mixing vessel at a temperature of 82.22 ° C (180 ° F). The materials were mixed until the solution was clear. UVI 6974 was added, and mixed until the components were dispersed (approximately 2 minutes). The Cab-O-Sil was added to the mixture and mixed until it was substantially free of lumps. A vacuum was applied to the mixture until substantially all the air was removed (27 mm Hg, 10 minutes). This composition was applied on a 10.16 cm x 30.48 cm (4 x 12 inches) elbow that has been coated with an automotive F coating, exposed to UV light, painted white, baked and then subjected to an Environmental Exposure Direct from South Florida Inland, 5 ° South to determine the microbial resistance of this composition. After periods of three months, six months, twelve months and twenty-four months, no growth of mold, mildew or other microbe was detected by visual observation.

EXAMPLE 12 This example illustrates a two-component system that can be produced using exposure to UV light. The composition was obtained by contacting Part "A" with Part "B". Part "A" and Part "B" were pre-blended in a mixer and brought into contact by means of a static mixer. The following tables list the components of Part A and Part B.

Part A REGISTERED NAME COMPONENT QUANTITY Uvacure 1500 epoxy cycloaliphatic 35 Dynacoll 71 1 0 polyol 10 Cab-O-Sil M5 silica powder 5 Part B REGISTERED NAME COMPONENT QUANTITY Tone 0301 polyol 35 Dynacol 71 1 0 polyol 10 Cab-O-Sil silica powder 3 commodity phosphoric acid 2 Additionally, the ingredients of the two-component system can be combined using the mixing technique described previously while ensuring that the constituents of Part A and Part B are segregated prior to use. The components can be contacted either manually or in a suitable container, or distributor through a commercially available static mixing tube and simultaneously applying the resulting fluid onto the substrate in question. This composition was pumpable, paintable and can be used to repair damaged painted surfaces, for example, an automotive body panel.

EXAMPLE 13 This Example illustrates the use of a robotic means to apply a UV curable material within a channel for the roof of a car to seal the underlying weld. The UV-curable composition of Example 5 was distributed in a channel for the roof of a car by a computer-controlled robot using a positive displacement, reciprocating piston pump, 18.92 liters (5 gallons), a controlled dosing system with DRY temperature and a robotic back suction gun. Two robots were used for this application attempt: a) Fanuc model F500 was used to distribute the composition towards the channel and b) a Fanuc model 420i was used to transport a UV light source along a channel to cure the composition . The UV light source comprised a 6-inch, 500-watt / inch bulb, Fusion Systems model T-6, type H, mounted on the model 420i arm so that the UV bulb ran or it worked in parallel to the channel. The composition was distributed at a speed of 250 mm / sec and the UV light was passed over the composition distributed at a speed of 250 mm / sec .; for a total application and a curing time of 30 seconds. The material was applied at room temperature. The following process steps were used to distribute and cure the composition: 1. The starting position of the curing robot was directly below one end of the "D" pillar of the channel for the roof with the UV light on it. 2. The distribution robot was moved to an initial position (placed 3 to 5 mm directly above the channel) approximately 45.72 cm (18 inches) in front of the end of the channel (between the D and C pillars). 3. The UV-curable composition was applied to the channel that moves towards the D-pillar. The material was applied within the range of 8 to 15 mm from the end of the channel, at this moment the distribution robot moves upwards and moves away from the channel. 4. The curing robot immediately started moving along the length of the channel starting at the D-pillar and moving forward. Meanwhile, the distribution robot was moved back to its original starting point (3 to 5 mm directly above the channel approximately 45.72 cm (18 inches) in front of the end of the channel) and the material was applied in the channel while moving forward.

At this point, both robots moved in series forward along the channel. The distance between the dispensing gun and the lamp housing was approximately 15.24 cm (6 inches) to 20.32 cm (8 inches).

The distribution robot applied the material in the channel in the interval within 8 to 15 mm of the front of the channel (pillar A) and moved immediately upwards and away from the channel.

The curing robot continued the movement to the front of the channel (pillar A) and immediately reversed the direction, traveling back the full length of the channel and stopping at its original starting position.

, UV light was turned off and a self-supporting layer was formed in the channel.

A person skilled in this art could understand that these Exemplary processes can be modified by manipulating the process variables such as the time and temperature of each mixing step mentioned above, the mixing speed (RPM), the time under vacuum, the exposure to UV light, and vacuum level (mm Hg) as well as the operation of a continuous process. Although the above Examples illustrate a batch process, a person skilled in the art after having reviewed and understood the present disclosure would be able to manipulate the variables of the aforementioned process to adapt the present composition for a virtually unlimited array of product applications. .

It is noted that in relation to this date the best method known by the applicant to carry out the aforementioned invention, is that which is clear from the present description of the invention.

Having described the invention as above, property is claimed as contained in the following

Claims (27)

1. A composition curable with radiation, characterized in that it comprises a combination of at least one cationic epoxy, a bis-F-epoxy, at least one polyol, at least one thickener and at least one photoinitiator.

2. A composition curable with radiation, characterized in that it comprises a cycloaliphatic epoxy, at least one polyol, at least one thickener, at least one photoinitiator and at least one phenoxy resin.

3. A composition curable with radiation, characterized in that it comprises a combination of at least one cycloaliphatic epoxy, at least one polyol, at least one thickener, at least one photoinitiator and at least one monomer.

4. A composition curable with radiation, characterized in that it comprises a combination of at least one cationic epoxy, at least one polyol, at least one photoinitiator, an optional thickener and at least one blowing agent.

5. The composition according to claims 1, 2, 3 or 4, characterized in that the thickener comprises silica.

6. The composition according to claims 1, 2, 3 or 4, characterized in that the ratio of epoxy to polyol is from 1: 1 to 2: 1.

7. The composition according to claims 1, 2, 3 or 4, characterized in that the at least one polyol comprises a polyester polyol and a polyether polyol.

8. The composition according to claims 1, 2, 3 or 4, characterized in that the photoinitiator comprises a sulfonium salt.

9. The composition according to claims 1, 2, 3 or 4, characterized in that it also comprises at least one element selected from the group consisting of expansion agents and gelling agents.

10. The composition according to claim 9, characterized in that the expansion agent is encapsulated.

11. The composition according to claims 1, 2, 3 or 4, characterized in that it also comprises at least one element selected from the group of sulfonic acid, phosphoric acid, carboxylic acids and tannic acid.

12. The composition according to claim 3, characterized in that the monomer comprises at least one element selected from the group consisting of acrylates and caprolactones.

13. The composition according to claims 1, 2 or 3, characterized in that it also comprises the polybutadiene.

14. The composition according to claims 1, 2, 3 or 4 characterized in that it also comprises at least one surfactant.

15. The composition according to claims 1, 2, 3 or 4, characterized in that the epoxy varies from 45 to 60% by weight of the composition.

16. The composition according to claims 1, 2, 3 or 4, characterized in that it also comprises the epoxy of bis-phenol A.

17. The use of the composition according to claims 1, 2 or 3 to form a painted self-supporting article, layer or seal having a Shore A Hardness greater than 70, and a shrinkage by ASTM D2453 of about 0%.

18. A method for the treatment of an automotive component, characterized in that it comprises: providing a composition curable with radiation comprising a combination of at least one epoxy, at least one polyol, at least one thickener and at least one photoinitiator, providing an automotive component that has a primer surface or coated with E, applying the composition on the automotive component, substantially simultaneously with the application which 'exposes the composition to a sufficient radiation source to cause in situ crosslinking of at least a portion of the composition , heat the at least partially crosslinked composition, paint the composition and the component.

19. A method for sealing a welded joint or seam between automobile components, characterized in that it comprises: providing a radiation curable composition comprising a combination of at least one epoxy, at least one polyol, at least one thickener and at least one photoinitiator , providing automotive components having a weld or seam therebetween, applying the composition to the weld or to the seam, substantially simultaneously with the application exposing the composition to a source of sufficient radiation to cause in situ crosslinking of the minus a portion of the composition, paint the composition and the component.

20. A method for repairing or protecting a painted automotive component, characterized in that it comprises: providing a radiation curable composition comprising a combination of at least one epoxy, at least one polyol, at least one thickener and at least one photoinitiator, providing an automotive component painted, applying the composition on the automotive component painted as a spray or gel, exposing the composition to a sufficient radiation source to cause in situ crosslinking of at least a portion of the composition, optionally applying a sandblast to the composition and paint the composition and the component.

21. The method according to claim 18, 19 or 20, characterized in that the composition further comprises at least one element selected from the group consisting of cycloaliphatic epoxy, bisphenol A epoxy, Bis-F-epoxy, phenoxy resin, polyester polyols, polyether polyols, acrylates, caprolactones and blowing agents.

22. The method according to claim 18, 19 or 20, characterized in that the radiation source comprises ultraviolet light.

23. The method according to claim 22, characterized in that the ultraviolet light has a wavelength of 250 to 400 nm.

24. The method according to claim 18, characterized in that the heating is at a temperature and during a time interval sufficient to improve the adhesion of the crosslinked composition at least partially.

25. The method according to claim 18, 19 or 20, characterized in that the composition further comprises an expansion agent.

26. The method according to claim 18 or 19, characterized in that the application comprises at least one means of spraying, pumping, brushing, submerging and robotic.

27. The method according to claim 18, 19 or 20, characterized in that the automotive component comprises a channel for the roof.