Abstract:
A vehicle masking material and method of use. The masking material in one embodiment includes polyvinyl alcohol, ethyl alcohol, glycerine or triethylene glycol, a surfactant, and water. The masking material is applied to a surface which is to be protected from paint overspray or other mechanical process, allowed to dry, and paint is applied. After drying of the paint, the masking material is removed by peeling or water washing.
Abstract:
A coating nozzle (3) movable in a horizontal direction perpendicular to an advancing direction of a vehicle body (1) drops or trickles a strippable paint linearly along one side of the periphery of an area to be protected, and an air blow-off unit (4) blows off air (F) at a predetermined angle against a surface to which the strippable paint is applied, whereby the strippable paint is spread over the area to be protected, and when the thus spread strippable paint becomes dry, it forms a protective film. The strippable paint is prevented from adhering to a portion other than the area to be protected, and the protective film of strippable paint has a uniform thickness.
Abstract:
Solvent free liquid masking compositions comprise from about 5 to about 20 percent by weight of an aliphatic polyol; from about 1 to about 20 percent by weight of a plasticizer; from about 0.1 to about 1 percent by weight of a surfactant; and sufficient water to total 100 percent by weight, wherein the masking composition is water-soluble and devoid of volatile organic chemicals; it is devoid of polymer resins other than polyvinyl alcohol in amounts sufficient to render the film water-insoluble and is stain resistant to applied surfaces. A method for protecting selected surfaces from paint in painting operations comprises applying a solvent free liquid masking composition to selected surfaces of an object where paint subsequently applied is not desired; allowing the liquid masking composition to dry, forming a film; painting the object, whereby surfaces carrying the film are protected from the application of paint; and removing the film.
Abstract:
A method of accurately applying maskant to a workpiece using one or more scanned laser beams and a maskant delivery device. The method includes the interaction of the laser beams with the maskant material while the material is in transit to, and after it has reached the surface of, the workpiece. Other features of the method include: laser roughening of application surfaces and laser melting of maskant to enhance adhesion of the maskant, laser measurement of maskant edges and correction of detected edge errors, and suppression of maskant ignition by forced ventilation and inert gas environments.
Abstract:
This invention relates to a strippable coating film for use as a masking material serving to create attractively finished boundaries, for example, in multi-color painting of automobiles and the like, as well as a coating method using such a coating film.A coating film containing 1 to 20 parts by weight of carbon black per 100 parts by weight of the resin component present therein is suitable. Especially preferred is a coating film formed of an acrylic emulsion paint and having an adhesion to the substrate of 20 to 1000 g/inch as expressed in terms of 180.degree. peeling strength. It is disclosed that, by equipping a YAG laser with a Q-switching oscillator unit and operating the Q-switch at a pulse repetition frequency of 0.5 to 30 kHz, the coating film can be cleanly cut to achieve an attractive finish in multi-color painting. Alternatively, a two-layer coating film containing the above-defined amount of carbon black may be formed by applying a coating material having adhesive power to a substrate to form an undercoating layer in contact with the substrate and then applying a coating material having flexibility and exhibiting film-forming properties to the undercoating layer to form an overcoating surface layer. This two-layer coating film is more effective than the single-layer coating film in preventing the substrate from being damaged.
Abstract:
In a process for masking a part subjected to a high pressure washing cycle between the applications of two or more paint coats, the improvement comprising the steps of: spray coating on a prepainted part a washable masking material which is cuttable when set to form a nonwicking edge; self adhering the spray coating and cutting it along a paint line to form a nonwicking mask edge which prevents paint leakage or the trapping or washing solution between the masking material and part and leakage of such trapped washing solution onto a subsequently painted surface. The process includes the step of cutting and cleanly peeling a portion of the masking material from the part following the drying of the sprayed mask to expose part of the prepainted surface; at least one subsequent washing and drying of the masked part; and at least one subsequent painting of the exposed prepainted surface.
Abstract:
There is disclosed a water-base coating composition and method for its use that forms a readily strippable protective film on metal surfaces. The composition includes a film former ingredient which is a terpolymer of polyvinyl butyral, polyvinyl alcohol and polyvinyl acetate. The water-base coating composition also contains a fugitive corrosion inhibitor, i.e., a corrosion inhibitor having a sufficient vapor pressure to impart corrosion resistance to surfaces coated with the film former composition. Suitable corrosion inhibitors are aromatic triazoles such as benzotriazole. A leveling agent such as morpholine is used to prevent the film from pulling from the edges during drying. Morpholine is particularly advantageous as it extends the working time when coating objects, and prevents the dispersion from clogging nozzles of spraying equipment. Morpholine also contributes to the corrosion inhibition of the coating.
Abstract:
This invention relates to a strippable coating process and a coating composition therefor comprising (1) a latex, (2) a coagulant for said latex and (3) a debonding agent consisting essentially of a substantially non-volatile additive which is adhesive to at least one of either the coated substrate or coagulated coating, more soluble in water than in the coagulated latex polymer component and having a solubility parameter at least 2(calories/cc).sup.1/2 higher than the coagulated latex polymer component.The protective coating is formed by impinging a stream of a latex and a stream of a coagulant, the two streams being oppositely charged, onto a substrate. After drying an external debonding agent is applied between the coating and the substrate and thereafter the coating is stripped from the substrate.
Abstract:
THIS INVENTION RELATES TO A STRIPPABLE COATING PROCESS AND A COATING COMPOSITION THEREFOR COMPRISING (1) A LTEX, (2) A COAGULATN FOR SAID LATEX AND (3) A DEBONDING AGEND CONSISTING ESSENTIALLY OF A SUBSTANTIALLY NONVOLATILE ADDITIVE WHICH IS ADHESIVE TO AT LEAST ONE OF EITHER THE COATED SUBSTRATE OF COAGULATED COATING, MORE SOLUBLE IN WATER THAN IN THE COAGULATED LATEX POLYMER COMPONENT AND HAVING A SOLUBILITY PARAMETER AT LEAST 2 (CALORIES/CC.) 1/2 HIGHER THAN THE COAGULATED LATEX POLYMER COMPONENT.