EP0471324A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Water-repellant composition
Assignee: DuPont Toray Specialty Materials KK
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Filing: 1991-08-12
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Granted: —
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Expires: 2011-08-12
Abstract
Abstract The present invention relates to a water-repellent composition which can impart a superior water repellency to various types of hard-surface materials such as metals, plastics, and so forth. The water-repellent composition contains an organic solvent-soluble organopolysiloxane resin comprising: (A) C n F 2n+1 RSiO 3/2 units; (B) R¹₃SiO 1/2 units; and (C) SiO 4/2 units; wherein R is an alkylene radical, R¹ is an alkyl radical, and n is an integer of from 1 to 10; provided the molar ratio of units (A + B)/C has a value of 0.60 to 2.10.
Inventors
- 👤 Asao Harashima
- 👤 Shuji Shindo
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 20:21
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/18; C09D; C09D183/00; C09D183/04; C09D183/08
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
64 words
A water-repellent composition containing an organic solvent-soluble organopolysiloxane resin comprising: (A) C n F 2n+1 RSiO 3/2 units; (B) R¹₃SiO 1/2 units; and (C) SiO 4/2 units; wherein R is an alkylene radical, R¹ is an alkyl radical, and n is an integer of from 1 to 10; provided the molar ratio of units (A + B)/C has a value of 0.60 to 2.10.
Claim 2
Dependent Claim
61 words
The organic solvent-soluble organopolysiloxane resin of Claim 1 wherein component (A) is selected from the group consisting of CF₃-CH₂CH₂-SiO 3/2 , C₂F₅-CH₂CH₂-SiO 3/2 , C₃F₇-CH₂CH₂-SiO 3/2 , C₄F₉-CH₂CH₂CH₂SiO 3/2 and mixtures thereof, wherein component (B) is (CH₃)₃SiO 1/2 abd the sum of components (A) + (B) + (C) is at least 70 mole percent of the organic solvent- soluble organopolysiloxane resin.
Claim 3
Dependent Claim
77 words
A water-repellent composition of claim 1 containing an organic solvent-soluble organopolysiloxane resin comprising: (A) 0.01 to 1.40 moles of CF₃CH₂CH₂SiO 3/2 ; (B) 0.40 to 2.00 moles of (CH₃)₃SiO 1/2 ; and (C) 1.00 mole of SiO 4/2 ; wherein the molar ratio of units (A + B)/C has a value of 0.60 to 2.10; provided the sum of components (A) + (B) + (C) is at least 70 mole percent of the organic solvent-soluble organopolysiloxane resin.
References Cited (Backward Citations)
No citation records indexed.
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