EP0498666A2
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Film-former composition
Assignee: Shin-Etsu Chemical Co Ltd
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Filing: 1992-02-07
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Granted: —
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Expires: 2012-02-07
Abstract
Abstract The present film-former composition comprises (a) an organosilazane copolymer having a perfluoroalkyl group-containing structural unit and a methacryloyloxy group-containing structural unit, (b) a photosensitizer soluble in an organic solvent, and (c) an organic solvent. The composition is cured by irradiation with ultraviolet light for a short period of time to form a film excellent in water repellency, oil repellency, and hardness.
Inventors
- 👤 Yoshihito Ohsawa
- 👤 Kouhei Hasegawa
- 👤 Masanori Sutou
- 👤 Satoshi Kuwata
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 23:11
CPC Classifications
C; C09; C09D; C09D183/00; C09D183/14; C09D183/16
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
458 words
A film-former composition, comprising (a) an organosilazane copolymer comprising at least one structural unit selected from the group [A] consisting of the units represented by the following general unit formula [I]: [R¹CH₂) m ] a R² b Si(NR³) (4-a-b)/2 [I] wherein R¹ represent a perfluoroalkyl group, R² and R³, which may be the same or different, each represent a hydrogen atom or a monovalent hydrocarbon group, a is an integer of 1 to 3, b is an integer of 0 to 2, with a + b being an integer of 1 to 3, and m is an integer of 2 to 5, the units represented by the following general unit formula [II]: [R¹(CH₂) m ] a R² b SiO (4-a-b)/2 [II] wherein R¹, R², a, b, and m have the same meanings as defined above, and the units represented by the following unit formula [III]: [R¹(CH₂) m ] c R² d SiO e/2 (NR³) 1/2 [III] wherein R¹, R², R³, and m have the same meanings as defined above, c is an integer of 0 or 1, d, e, and f each are an integer of 1 or 2, with c + d + e + f being 4, and at least one structural unit selected from the group [BI consisting of the units represented by the following general unit formula [IV]: [R⁴(CH₂) n ] g R² h Si(NR³) (4-g-h)/2 [IV] wherein R⁴ represents an unsaturated fatty ester, R² and R³ have the same meanings as defined above, g is an integer of 1 to 3, h is an integer of 0 to 2, with g + h being an integer of 1 to 3, and n is an integer of 2 to 5, the units represented by the following general unit formula [V]: [R⁴(CH₂) n ] g R² h SiO (4-g-h)/2 [V] wherein R², R⁴, g, h, and n have the same meanings as defined above, and the units represented by the following general unit formula [VI]: [R⁴(CH₂) n ] i R² j SiO k/2 (NR³) 1/2 [VI] wherein R², R³, R⁴ and n have the same meanings as defined above, i is an integer of 0 or 1, and j, k, and l each are an integer of 1 or 2, with i + j + k + l being 4, provided. that the structural unit selected from the group [A] and the structural unit selected from the group [B] are contained in such amounts that the molar content ratio of the perfluoroalkyl group (R¹) to the total of the hydrogen atom or monovalent hydrocarbon group (R²) and the unsaturated fatty ester group (R⁴) satisfies R¹/(R² + R⁴) = from 99/1 to 50/50, (b) a photosensitizer soluble in an organic solvent, and (c) an organic solvent.
Claim 2
Dependent Claim
52 words
A composition as claimed in claim 1, wherein said organosilazane copolymer (a) is contained in an amount of 0.1 to 30 wt. % in the composition and said photosensitizer (b) is contained in an amount of 1 to 50 parts by weight per 100 parts by weight of said organosilazane copolymer (a).
Claim 3
Dependent Claim
34 words
A composition as claimed in claim 1, wherein, in the general formulas [I] to [III] representing structural units belonging to said group [A], R¹ represents a perfluoroalkyl group having 4 to 20 carbon atoms.
Claim 4
Dependent Claim
28 words
A composition as claimed in claim 1, wherein, in the general formulas [IV] to [VI] representing structural units belonging to said group [B], R⁴ represents a methacryloyloxy group.
Claim 5
Dependent Claim
26 words
A composition as claimed in claim 1, wherein structural units belonging to said group [A] are C₈F₁₇CH₂CH₂Si(NH) 3/2 , C₄F₉CH₂CH₂Si(NH) 3/2 , C₁₀F₂₁CH₂CH₂Si (NH) 3/2 ,
Claim 6
Dependent Claim
16 words
A composition as claimed in claim 1, wherein structural units belonging to said group [B] are
Claim 7
Dependent Claim
218 words
A composition as claimed in claim 1, wherein said organosilazane copolymer (a) further contains, in addition to the structural units belonging to the group [A] and the group [B], at least one unit selected from the group consisting of units represented by the following general unit formula [VII]: R² p Si(NR³) (4-p)/2 [VII] wherein R² and R³ have the same meanings as defined above and p is an integer of 1 to 3, units represented by the following general unit formula [VIII]: [R¹(CH₂) m ] q [R⁴(CH₂) n ] r R² s SiO (4-q-r-s)/2 [VIII] wherein R¹, R², R⁴, m and n have the same meanings as defined above, q and r each are an integer of 0 to 2, and s is an integer of 1 to 3, with q + r + s being an integer of 1 to 3, and units represented by the following general unit formula [IX]: [R¹(CH₂) m ] t [R⁴(CH₂) n ] u R² v SiO w/2 (NR³) x/2 [IX] wherein R¹, R², R³, R⁴, m, and n have the same meanings as defined above, t and u each are an integer of 0 or 1, and v, w, and x each are an integer of 1 or 2, with t + u + v + w + x being 4.
Claim 8
Dependent Claim
20 words
A composition as claimed in claim 1, wherein said photosensitizer (b) is a carbonyl compound soluble in an organic solvent.
Claim 9
Dependent Claim
17 words
A composition as claimed in claim 1, wherein said organic solvent (c) is a fluorinated hydrocarbon solvent.
References Cited (Backward Citations)
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