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US4315091A Expired / Lapsed US ⏱️ 0.0 years remaining

Coatings for thermoplastics

Assignee: Bayer AG
•
Filing: 1980-04-07
•
Granted: 1982-02-09
•
Expires: 2000-04-07
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Abstract

Abstract A coating composition to improve the abrasion and scratch resistance of plastics such as polycarbonate, consisting essentially of about (A) 10-40% by weight of a partially hydrolyzed siloxane compound which is obtained by hydrolyzing in water at about 50°-80° C. over a period of about 1-12 hours at least one of (a) a hydrocarbon-trialkoxysilane of the formula R'Si(OR") 3 wherein R' is an alkyl group with 1 to 4 carbon atoms or a phenyl or vinyl group, and R" is an alkyl group with 1 to 4 carbon atoms, (b) a co-condensation product of (a) and about 1 to 40% by weight of a phenyl- or vinyl-trialkoxysilane, the alkoxy group containing 1 to 4 carbon atoms, (c) a co-condensation product of 1 mol of (a) and 0.05 to 1 mol of a tetraalkoxysilane, in which the alkoxy group contains 1 to 4 carbon atoms, and (d) a co-condensation product of 1 mol of (a) and 0.05 to 1 of a dialkyldialkoxysilane, in which the alkyl and alkoxy groups contain 1 to 4 carbon atoms. (B) 0 to 40% by weight of an aqueous dispersion of colloidal silicon dioxide, (C) 0 to 5% by weight of an etherified methylolmelamine, (D) 0.05 to 15% by weight of a blocked polyisocyanate, (E) 0.5 to 30% by weight of acetic acid, and (F) an inert organic solvent as the remainder.

Inventors

  • 👤 Helmut Steinberger
  • 👤 Manfred Schonfelder
  • 👤 Hans-Heinrich Moretto
  • 👤 Christian Wegner

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-25 02:24
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/61; C08J; C08J7/00; C08J7/04; C08J7/0427; C08J7/043; C08J7/046; C08K; C08K5/00; C08K5/04; C08K5/09; C09; C09D; C09D183/00; C09D183/04; C08J2483/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31507; Y10T428/31652; Y10T428/31663

Claims Analysis

Total Claims: 10
Claim 1
Independent Claim 194 words
A coating composition consisting essentially of about (A) 10-40% by weight of a partially hydrolyzed siloxane compound which is obtained by hydrolyzing in water at about 50°-80° C. over a period of about 1-12 hours at least one of (a), (b), (c), and (d), wherein (a) is a hydrocarbon-trialkoxysilane of the formula R'Si(OR") 3 wherein R' is an alkyl group with 1 to 4 carbon atoms or a phenyl or vinyl group, and R" is an alkyl group with 1 to 4 carbon atoms (b) is a co-condensation product of (a) and about 1 to 40% by weight of phenyl- or vinyl-trialkoxysilane, the alkoxy group containing 1 to 4 carbon atoms, (c) is a co-condensation product of 1 mol of (a) and 0.05 to 1 mol of a tetraalkoxysilane, in which the alkyl and alkoxy groups contain 1 to 4 carbon atoms, (B) 0 to 40% by weight of an aqueous dispersion of colloidal silicon dioxide, (C) 0 to 5% by weight of an etherified methylolmelamine, (D) 0.05 to 15% by weight of a blocked polyisocyanate, (E) 0.5 to 30% by weight of acetic acid, and (F) an inert organic solvent as the remainder.
Claim 2
Dependent Claim 194 words
A coating composition consisting essentially of about (A) 10-40% by weight of a partially hydrolyzed siloxane compound which is obtained by hydrolyzing in water at about 50°-80° C. over a period of about 1-12 hours at least one of (a), (b), (c), and (d), wherein (a) is a hydrocarbon-trialkoxysilane of the formula R'Si(OR") 3 wherein R' is an alkyl group with 1 to 4 carbon atoms or a phenyl or vinyl group, and R" is an alkyl group with 1 to 4 carbon atoms (b) is a co-condensation product of (a) and about 1 to 40% by weight of phenyl- or vinyl-trialkoxysilane, the alkoxy group containing 1 to 4 carbon atoms, (c) is a co-condensation product of 1 mol of (a) and 0.05 to 1 mol of a tetraalkoxysilane, in which the alkyl and alkoxy groups contain 1 to 4 carbon atoms, (B) 0 to 40% by weight of an aqueous dispersion of colloidal silicon dioxide, (C) 0 to 5% by weight of an etherified methylolmelamine, (D) 0.05 to 15% by weight of a blocked polyisocyanate, (E) 0.5 to 30% by weight of acetic acid, and (F) an inert organic solvent as the remainder.
Claim 3
Dependent Claim 10 words
A composition according to claim 1 wherein (A) is (a).
Claim 4
Dependent Claim 10 words
A composition according to claim 1, wherein (A) is (b).
Claim 5
Dependent Claim 10 words
A composition according to claim 1, wherein (A) is (c).
Claim 6
Dependent Claim 10 words
A composition according to claim 1, wherein (A) is (d).
Claim 7
Dependent Claim 11 words
A composition according to claim 1, wherein R'Si(OR") 3 comprises methyltriethoxysilane.
Claim 8
Dependent Claim 18 words
A composition according to claim 1, wherein etherified methylolamine of (C) is a lower alkyl or cycloalkyl ether.
Claim 9
Dependent Claim 11 words
A thermoplastic polymer coated with a composition according to claim 1.
Claim 10
Dependent Claim 9 words
Polycarbonate coated with a composition according to claim 1.

References Cited (Backward Citations)

US4239798A Cited
US4207357A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1985-02-08 1985-08-10 1986-02-09 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1989-02-08 1989-08-10 1990-02-09 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1993-02-08 1993-08-10 1994-02-09 $7700.00 Window Closed / Lapsed

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