JPS62100560A - Lightweight chipping-resistant coating material - Google Patents

Abstract

PURPOSE:To obtain the titled coating material capable of reducing the weight without wholly deteriorating the chipping resistance, by replacing the half or less of the amount of a filler component in a vinyl chloride plastisol based chipping-resistant coating material with a hollow filler. CONSTITUTION:A lightweight chipping-resistant coating material obtained by replacing 1-50wt% filler component, e.g. talc, calcium carbonate, mica, silica or titanium oxide, of a vinyl chloride plastisol based chipping-resistant coating material with a hollow filler.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention relates to a lightweight chipping-resistant paint in which a part of the filler component contained in a vinyl chloride plastisol-based chipping-resistant paint is replaced with a hollow filler.

B. Conventional technology In recent years, vinyl chloride has been used instead of the conventional bituminous undercoat material on the underside of automobile floors, side seals, 7L tanks, front aprons, and tire houses to protect against damage caused by flying stones while driving. Plastisol (hereinafter referred to as “
A coating material called a chipping-resistant material (sometimes referred to as "vinyl chloride sol") is generally applied using an airless coating device.

In addition, as a technique for using hollow fillers, hollow fillers are exemplified as filler components in molded soundproofing paints consisting of a rubber component and a filler component (Japanese Patent Laid-Open No. 55-5
8261 and several other examples), and hollow-shaped ones are exemplified as fillers in rubber asphalt emulsion 7, a soundproofing and vibration-proofing method in which rubber asphalt emalun 1 and a coagulant composition are applied. There is only a technique known as 1987-878798, and no technique using hollow fillers for the purpose of reducing the weight of chipping-resistant paints has yet been proposed.

Problems that the C0 invention aims to solve On the other hand, in order to extend the service life of vehicles and improve the required level of rust prevention, the market needs for expanding the coating area and increasing the coating thickness of the above-mentioned PVC sol-based chipping-resistant paint are emerging. It's getting bigger.

However, such measures have the problem of immediately increasing the weight of the vehicle, deteriorating the running performance, and going against the goal of energy saving by reducing the weight of the vehicle type f1.

Means for Solving the D0 Problem The present inventors have conducted extensive research to find a chipping-resistant paint that can be made lighter without reducing the chipping-resistant performance per unit application. The hollow filler exemplified as the filler component of the coating-type soundproofing/vibration damping material as described above is used in a proportion of 1 to 50% by weight, preferably 1 to 50% by weight of the filler component used in the PVC sol-based chipping-resistant paint. 3～
It has been surprisingly discovered that by replacing 30% by weight, an excellent chipping-resistant paint can be obtained which solves all of the above problems.

E8 action The hollow filler has a lower specific gravity compared to the filler used in conventional chipping-resistant paints, so the specific gravity of the chipping-resistant paint as a whole has also increased from 1.35 to 1.55 to 1.05 to 1.
．． 15, which is a decrease of 0.3 to 0.5.

Moreover, there is no problem that the inherent performance of the chipping-resistant paint is deteriorated due to replacing 1 to 50% by weight of the conventionally used filler component with hollow fillers.

F. Constituent Vinyl chloride plastisol is made by dispersing vinyl chloride-based T3 (fat) in a plasticizer and blending fillers and additives. It is preferable to use homopolymers such as polyvinylidene chloride, copolymers made of vinyl chloride, vinyl acetate, vinylidene chloride, etc. 6. As plasticizers, heptalic acid esters, tribasic acid esters, phosphoric acid esters, polyester-based A plasticizer or the like is used, and DOP is particularly preferred.

Conventionally used fillers include powders of talc, calcium carbonate, diatomaceous earth, mica, kaolin, sulfuric acid, magnesium carbonate, erosil, vermiculite, graphite, alumina, silica, rubber, etc. Furthermore, coloring agents such as titanium oxide and carbon black may also be used.

There are 8 hollow fillers that are blended as an essential component of the present invention! Quality, no W! Can be used regardless of quality, plus balloons,
Examples include glass balloons, silica balloons, and carbon hollow spheres.

In the present invention, it is essential to replace 1 to 50% by weight of the total filler with hollow fillers; if the amount is less than 1% by weight, the weight reduction effect will be diminished, and if it is replaced by more than 50% by weight, There is a possibility that chipping resistance performance may deteriorate.

The hollow filler used in the present invention weighs 120 kg when the chipping-resistant paint is applied using an airless spray.
/cm2, or at least enough strength to prevent the hollow filler from being crushed. However, when applying, not only airless spray but also brushing can be used, and in such cases, the strength of the hollow filler is almost 2! There is no need to think about it.

The hollow filler can be used as long as it has a particle size of 300μ or less, and preferably has a size that allows 95% of the entire material to pass through 100 meshes (approximately 150μ or less); if the particle size is too large, In the case of airless spraying, if the pattern width varies, gamma clogging may occur, and the finished surface may become rough. Furthermore, if the particle size is too small, the compressive strength will decrease and the weight reduction effect will not be achieved, so it is better to avoid this as much as possible.

The bulk specific gravity of the hollow filler can range from 0.1 to 0.4'c+r, preferably from 0.2 to 0.3.

That is, it is more preferable for the hollow filler to have a small bulk specific gravity if it has good strength.

The lightweight chipping-resistant paint of the present invention may further contain conventional additives such as preservatives, dispersants, thickeners, thixotropic agents, antifreeze agents, and 1) H regulators.

G, Examples, Comparative Examples Examples Polyvinyl chloride-based U! (consisting of polyvinyl chloride resin and vinyl chloride vinyl acetate copolymer resin) ioo parts by weight DOP
100i1z calcium carbonate
150 parts by weight carbon black
A lightweight chipping-resistant vinyl chloride sol-based paint was obtained from a paint composition consisting of 1 part by weight glass balloon, 20 parts by weight, and 5 parts by weight of a powder.

Comparative Example 1 Polyvinyl chloride resin (consisting of polyvinyl chloride resin and vinyl chloride vinyl acetate copolymer resin) 100 parts by weight DOP
100 parts by weight calcium carbonate
170 parts by weight carbon black 1
A vinyl chloride sol-based chipping-resistant paint was obtained from a paint composition containing 5 parts by weight of a dispersant.

The paints used in Examples and Comparative Examples were applied to test panels so that the coating thickness was 850 μm when dry.

Test method ■ The weight per 11 of the paints used in Examples and Comparative Examples was measured.

■20 placed perpendicular to the coating surface set at a 45° angle
The lower end of a PVC pipe with a length of 2 m (mmφ) is applied, and an M-4 nut specified by JIS is dropped from the upper end of the PVC pipe, and the total weight until the base material is exposed is evaluated.

Test results ■ ■ Example 113011/+ 65kg Comparative example 1440g/l 65kgH6 Effect of the invention The lightweight chipping-resistant paint of the present invention maintains the same chipping performance as before, while reducing the weight by about 20 to 30% compared to the conventional one. It became clear that it was wet.

Claims (1)

[Claims] A lightweight chipping-resistant paint characterized by replacing 1 to 50% by weight of the filler components of a vinyl chloride plastisol-based chipping-resistant paint with hollow fillers.