US4870149A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silicone composition for rendering surfaces non-adherent
Assignee: Shin-Etsu Chemical Co Ltd
•
Filing: 1988-07-29
•
Granted: 1989-09-26
•
Expires: 2008-07-29
Abstract
Abstract A solvent-free releasing silicone composition for rendering surfaces non-adherent which gives a cured film having desirable slip factor, toughness, and high-speed peel characteristics without sacrificing its inherenty merits such as curability, uniformity in peel resistance, and the residual adhesive strength employs a diorganovinylpolysiloxane having trivinylsilyloxy as one end group and either a vinyldimethylsilyl or trimethylsilyl group as the other end group.
Inventors
- 👤 Yasuaki Hara
- 👤 Hisashi Aoki
- 👤 Kazuma Momii
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:24
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C08G77/20; C08L; C08L83/00; C08L83/04; C08G77/12
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
49 words
A two-component solvent-free releasing agent silicone composition comprising a diorganovinylsiloxane component (A) and an organohydrogenpolysiloxane component (B) wherein at least 40 weight % of the diorganovinylsiloxane component (A) is one or more diorganovinylsiloxanes having trivinylsilyloxy as one end group and eithe rtrimethylsilyl or vinyldimethylsilyl as the other end group.
Claim 2
Dependent Claim
49 words
A two-component solvent-free releasing agent silicone composition comprising a diorganovinylsiloxane component (A) and an organohydrogenpolysiloxane component (B) wherein at least 40 weight % of the diorganovinylsiloxane component (A) is one or more diorganovinylsiloxanes having trivinylsilyloxy as one end group and eithe rtrimethylsilyl or vinyldimethylsilyl as the other end group.
Claim 3
Dependent Claim
57 words
A solvent-free releasing agent silicone composition according to claim 1, wherein at least 40 weight % of the diorganovinylpolysiloxane component (A) is a diorganovinylpolysiloxane represented by either formula (I) or (II); ##STR7## where R 1 and R 2 are monovalent organic radicals free from aliphatic unsaturation, and x and y are positive integers from 40 to 600.
Claim 4
Dependent Claim
76 words
A solvent-free releasing agent silicone composition according to claim 2, comprising: (A) as the diorganovinylsiloxane component (A) a diorganovinylpolysiloxane of formula (I) or (II) having a viscosity of 50 to 10,000 cSt at 25° C.; (B) as the organohydrogenpolyxiloxane component (B) 1 to 50 parts by weight per 100 parts by weight of (A) of an organohydrogenpolysiloxane having at least two silicon-bonded hydrogen atoms per molecule; and (C) a catalytically effective amount of a platinum-containing catalyst.
Claim 5
Dependent Claim
32 words
A solvent-free releasing agent silicone composition according to claim 3, wherein x and y are positive integers that imprat a viscosity to component (A) of 50 to 10,000 cSt at 25° C.
Claim 6
Dependent Claim
29 words
A solvent-free releasing agent silicone composition according to claim 2, wherein 60 to 100 weight % of component (A) is a diorganovinylpolysiloxane represented either by formula (I) or (II).
Claim 7
Dependent Claim
27 words
A solvent-free releasing agent silicone composition according to claim 3, wherein at least 80 mol % of the R 1 and R 2 groups are methyl groups.
Claim 8
Dependent Claim
25 words
A solvent-free releasing agent silicone composition according to claim 3, wherein the viscosity of the component (A) is 100 to 5,000 cSt at 25° C.
Claim 9
Dependent Claim
28 words
A solvent-free releasing agent silicone composition according to claim 3, wherein the organohydrogenpolysiloxane of component (B) has at least three hydrogen atoms bonded to silicon atoms per molecule.
Claim 10
Dependent Claim
29 words
A solvent-free releasing agent silicone composition according to claim 3, wherein at least 80 mol % of component (B) is an organohydrogenpolysiloxane having a methyl group in the molecule.
Claim 11
Dependent Claim
24 words
A solvent-free releasing agent silicone composition according to claim 3, wherein the viscosity of component (B) is 10 to 500 cSt at 25° C.
Claim 12
Dependent Claim
30 words
A solvent-free releasing agent silicone composition according to claim 3, wherein the amount of component (B) therein is 3 to 30 parts by weight per 100 parts of component (A).
Claim 13
Dependent Claim
37 words
A solvent-free releasing agent silicone composition according to claim 3, wherein the amount of the platinum-containing catalyst is 0.001 to 0.1 part by weight in terms of platinum content per 100 parts by weight of component (A).
Claim 14
Dependent Claim
22 words
A solvent-free releasing agent silicone composition according to claim 3, wherein the viscosity thereof is 50 to 10,000 cSt at 25° C.
Claim 15
Dependent Claim
81 words
A solvent-free releasing agent silicone composition according to claim 3, wherein 60 to 100 weight % of the diorganovinylpolysiloxane component is a diorganovinylpolysiloxane represented by either formula (I) or (II) in which at least 80 mol % of the R 1 and R 2 groups are methyl groups, wherein the viscosity of component (A) is 100 to 5,000 cSt at 25° C.; and wherein the organohydrogenpolysiloxane of component (B) has at least three hydrogen atoms bonded to silicon atoms per molecule.
Claim 16
Dependent Claim
31 words
A solvent-free releasing agent silicone composition according to claim 12 and wherein the amount of component (B) therein is 3 to 30 parts by weight per 100 parts of component (A).
References Cited (Backward Citations)
GB1374792A
Cited
US4057596A
Cited
US3900617A
Cited
US4071664A
Cited
US4689384A
Cited
US4721764A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-09-25 | 1993-03-27 | 1993-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-25 | 1997-03-27 | 1997-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-25 | 2001-03-27 | 2001-09-26 | $7700.00 | Window Closed / Lapsed |