Claims
- 1. A coating composition which comprises 100 parts by weight of a monomer mixture (A) comprising 30-98% by weight of a polyfunctional monomer having at least three substituents selected from the group consisting of acryloyloxy groups and methacryloyloxy groups in one molecule and 70-2% by weight of at least one monomer selected from the group consisting of methoxyethyl (meth)acrylate, ethoxyethyl (meth)acrylate, butoxyethyl (meth)acrylate, methoxydiethylene glycol (meth)acrylate and dipropylene glycol mono(meth)acrylate and 0-10 parts by weight of a photosensitizer and which can form a crosslinked hardened film excellent in abrasion resistance upon irradiation with actinic radiation in an air atmosphere.
- 2. The coating composition of claim 1, wherein the polyfunctional monomer is at least one polyfunctional (meth)acrylate selected from the group consisting of poly(meth)acrylates of mono or polypentaerythritol having at least three methacryloyloxy groups and/or acryloyloxy groups in one molecule wherein said mono or polypentaerythritol has the formula: ##STR3## (wherein at least three of X.sub.11, X.sub.12, X.sub.13, X.sub.22, X.sub.23, . . . Xn.sub.2, Xn.sub.3 and X.sub.14 are CH.sub.2 =CR--COO--group and the remainder are --OH group, n is an integer of 1-5 and R is hydrogen atom or methyl group).
- 3. The coating composition of claim 2, wherein the polyfunctional monomer is selected from the group consisting of pentaerythritol tri and tetra(meth)acrylate.
- 4. The coating composition of claim 2, wherein the polyfunctional monomer is selected from the group consisting of dipentaerythritol tri, tetra, penta and hexa(meth)acrylate.
- 5. The coating composition of claim 1 which comprises 5-90 parts by weight of said monomer mixture and 95-10 parts by weight of at least one organic solvent which is mixed with said monomer mixture to form a homogeneous solution.
- 6. The coating composition of claim 5, wherein the polyfunctional monomer is selected from the group consisting of pentaerythritol tri and tetra(meth)acrylate.
- 7. The coating composition of claim 5, wherein the polyfunctional monomer is selected from the group consisting of dipentaerythritol tri, tetra, penta and hexa(meth)acrylate.
- 8. The coating composition of claim 5, wherein the organic solvent has a boiling point of 50.degree.-200.degree. C.
- 9. The coating composition of claim 5, which has a viscosity of not more than 10 centripoises at 25.degree. C.
- 10. A method for producing an abrasion resistant synthetic resin molded product, which comprises coating on the surface of a synthetic resin molded product a coating composition which comprises 100 parts by weight of a monomer mixture (A) comprising 30-98% by weight of a polyfunctional monomer having at least three groups selected from acryloyloxy group and methacryloyloxy group in one molecule and 70-2% by weight of at least one monomer selected from the group consisting of methoxyethyl (meth)acrylate, ethoxyethyl (meth)acrylate, butoxyethyl (meth)acrylate, methoxydiethylene glycol (meth)acrylate and dipropylene glycol mono-(meth) acrylate and 0-10 parts by weight of a photosensitizer and which can form a crosslinked-hardened film excellent in abrasion resistance by irradiation with actinic radiation in an air atmosphere and then irradiating the coating film with actinic radiation to form a crosslinked-hardened film of 1-30 um thick on the surface of the synthetic resin molded product.
- 11. The method of claim 10, wherein the polyfunctional monomer is at least one polyfunctional (meth)acrylate selected from the group consisting of poly(meth)acrylates of mono or polypentaerythritol having at least three methacryloyloxy groups and/or acryloyloxy groups in one molecule wherein said mono or polypentaerythritol has the formula: ##STR4## (wherein at least three of X.sub.11, X.sub.12, X.sub.13, X.sub.22, X.sub.23, . . . Xn.sub.2, Xn.sub.3 and X.sub.14 are CH.sub.2 =CR--COO--group and the remainder are --OH group, n is an integer of 1-5 and R is hydrogen atom or methyl group).
- 12. The method of claim 11, wherein the polyfunctional monomer is selected from the group consisting of pentaerythritol tri and tetra(meth)acrylate.
- 13. The method of claim 11, wherein the polyfunctional monomer is selected from the group consisting of dipentaerythritol tri, tetra, penta and hexa(meth)acrylate.
- 14. The method of claim 10, wherein the synthetic resin molded product is methacrylic resin, polycarbonate resin, or polyallyl diglycol carbonate resin.
- 15. The method of claim 10, wherein said coating composition comprises 5-90 parts by weight of said monomer mixture and 95-10 parts by weight of at least one organic solvent (B) which is mixed with said monomer mixture to form a homogeneous solution.
- 16. The method of claim 15, wherein the polyfunctional monomer is at least one polyfunctional (meth)acrylate selected from the group consisting of poly(meth)acrylates of mono or polypentaerythritol having at least three methacryloyloxy groups and/or acryloyloxy groups in one molecule wherein said mono or polypentaerythritol has the formula: ##STR5## (wherein at least three of X.sub.11, X.sub.12, X.sub.13, X.sub.22, X.sub.23, . . . Xn.sub.2, Xn.sub.3 and X.sub.14 are CH.sub.2 =CR--COO--group and the remainder are --OH group, n is an integer of 1-5 and R is hydrogen atom or methyl group).
- 17. The method of claim 16, wherein the polyfunctional monomer is selected from the group consisting of pentaerythritol tri and tetra(meth)acrylate.
- 18. The method of claim 16, wherein the polyfunctional monomer is selected from the group consisting of dipentaerythritol tri, tetra, penta and hexa(meth)acrylate.
- 19. The method of claim 15, wherein the organic solvent has a boiling point of 50.degree.-200.degree. C.
- 20. The method of claim 15, which comprises coating the coating composition on the surface of the resin molded product, volatilizing and releasing at least 50% by weight of the organic solvent contained in the coated film and then irradiating the film with actinic radiation to form a crosslink-hardened film of 1-30.mu. thick on the surface of the molded product.
- 21. The method of claim 15, which comprises coating on the surface of the synthetic resin molded product the coating composition having a viscosity of not more than 10 centipoises at 25.degree. C. by dipping method and forming a crosslink-hardened film of 1-9.mu. thick.
- 22. The method of claim 15, wherein the synthetic resin molded product is methacrylic resin, polycarbonate resin or polyallyl diglycol carbonate resin molded product.
Priority Claims (1)
Number |
Date |
Country |
Kind |
52-19038 |
Feb 1977 |
JPX |
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Parent Case Info
This is a division of application Ser. No. 878,830, filed Feb. 17, 1978, now U.S. Pat. No. 4,199,421.
US Referenced Citations (11)
Foreign Referenced Citations (5)
Number |
Date |
Country |
48-42211 |
Dec 1973 |
JPX |
49-12886 |
Mar 1974 |
JPX |
49-22951 |
Jun 1974 |
JPX |
50-119869 |
Sep 1975 |
JPX |
1198259 |
Jul 1970 |
GBX |
Divisions (1)
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Number |
Date |
Country |
Parent |
878830 |
Feb 1978 |
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