Coating processes – Direct application of electrical – magnetic – wave – or... – Pretreatment of substrate or post-treatment of coated substrate
Patent
1991-11-22
1993-11-30
Thurlow, Jeffery
Coating processes
Direct application of electrical, magnetic, wave, or...
Pretreatment of substrate or post-treatment of coated substrate
264 22, 264349, 4273935, 427421, B29C 7104
Patent
active
052663620
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a surface treating and/or coating method for a molded article comprising a thermoplastic resin composition. More particularly, the present invention is concerned with a surface treating and/or coating method for a composition obtained by dynamically heat-treating a thermoplastic resin and/or a rubbery substance in the presence of a crosslinking agent, or a composition comprising the said composition and an inorganic filler incorporated therein, the said composition or the inorganic filler-incorporated composition being superior in the balance of rigidity, impact resistance, heat resistance, dimensional stability and moldability.
Heretofor, thermoplastic resins such as polyolefin resins, e.g. polyethylene and polypropylene, and polyester resins, have been used in various fields, including automobile parts, household electric products and electronic devices. In order to enhance the added value of these products there have been conducted surface coating, printing or plating, or lamination tehreto of non-woven fabric, foam or leather, or implantation of feathers therein. However, since polyolefin resins and polyester resins do not have a polar group, it is difficult to apply coating, bonding or printing thereto.
Generally, for the purpose of improving the coatability of the aforementioned products, there are conducted surface treatments such as a physical treatment, e.g. sandblasting, flame treating, corona discharge, or treatment using plasma, and a chemical treatment, e.g. treatment using chromic acid mixture or solvent.
However, such conventional physical treating methods involves the following problems: 1 the effect is unsatisfactory, 2 the treating speed is low and treating time long, 3 the apparatus is large-scaled and the process is complicated, and 4 the method is not economical.
The aforementioned chemical methods also involves problems; for example, 1 environmental pollution, and 2 considerable time, labor and cost are required for the disposal of liquid wastes used such as chemicals and solvents.
Both such conventional methods involve the problem that the coatability, printability and adhesive property in the use of coating material, ink and adhesive are still unsatisfactory.
SUMMARY OF THE INVENTION
The present invention has been accomplished in view of the above-mentioned points and it is the object of the invention to provide a surface treating and/or coating method for molded articles, extremely superior in coatability, printability and adhesive property, using a device of a simple structure.
Having made extensive studies for achieving the above-mentioned object, the present inventors found out a method capable of improving surface characteristics of molded articles. In this way we accomplished the present invention.
According to a first aspect of the present invention there is provided a surface treating and coating method for a molded article, characterized in that a molded article of a partially crosslinked, thermoplastic resin composition obtained by dynamically heat-treating (A) a thermoplastic resin and/or (B) a rubbery substance in the presence of (C) a crosslinking agent and, if desired, (D) a polyfunctional monomer is surface-treated by the radiation thereto of an ultraviolet light not longer than 300 nm in wave length and then coated.
According to a second aspect of the present invention there is provided a surface treating and coating method for a molded article, characterized in that a molded article of an inorganic filler-incorporated composition is surface-treated by the radiation thereto of an ultraviolet light not longer than 300 nm in wave length and then coated, the said inorganic filler-incorporated composition comprising 100 parts by weight of a partially crosslinked resin composition obtained by dynamically heat-treating (A) a thermoplastic resin and/or (B) a rubbery substance in the presence of (C) a crosslinking agent and, if desired, (D) a polyfunctional monomer, and (E) 1-200 parts by weight of an inorganic
REFERENCES:
patent: 3806558 (1974-04-01), Fischer
patent: 3892885 (1975-07-01), Bragole
patent: 3935329 (1976-01-01), Reilly et al.
patent: 4024317 (1977-05-01), Stoye et al.
patent: 4094756 (1978-06-01), Taylor
patent: 4160859 (1979-07-01), Renner et al.
patent: 4180531 (1979-12-01), Alia
patent: 4724057 (1988-02-01), Ebisawa et al.
patent: 4840851 (1989-06-01), Golander et al.
patent: 4853253 (1989-08-01), Katoh
patent: 4871796 (1989-10-01), Komatsu et al.
patent: 4902738 (1990-02-01), Mitsuno et al.
patent: 5026608 (1991-06-01), Polato et al.
patent: 5077082 (1991-12-01), Katoh et al.
patent: 5116908 (1992-05-01), Inoue et al.
patent: 5132131 (1992-07-01), Katoh et al.
Iwasaki Yoshiharu
Katoh Kohichiroh
Nogiwa Motomi
Japan (Agency of Industrial Science and Technology)
Nippon Petrochemicals Company Limited
Thurlow Jeffery
Vargot Mathieu
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