US4680363A
Expired / Lapsed
US
⏱️ 0.0 years remaining
One component silicone compositions with good bonding properties
Assignee: General Electric Co
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Filing: 1984-01-13
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Granted: 1987-07-14
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Expires: 2004-01-13
Abstract
Abstract An acid scavenger additive for a one-component, acyloxy-functional RTV composition. The acid scavenger is selected from magnesium materials, zinc materials, and aluminum materials. The acid scavenger prevents a discoloration of the metallic substrate and a decrease in bonding properties of the RTV composition to the substrate on which it is applied.
Inventors
- 👤 Melvin D. Beers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:17
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/09; C08K5/098; Y; Y10; Y10S; Y10S528/00; Y10S528/901
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
143 words
A process for forming a one component RTV silicone rubber composition with good bonding properties at high humidity conditions, comprising: (1) mixing (A) 100 parts by weight of a silanol end-stopped diorganopolysiloxane polymer having a viscosity from 100 to 1,000,000 centipoise at 25° C. where the organo groups are monovalent hydrocarbon radicals; (B) from 0.1 to 10 parts by weight of an acyloxy functional cross-linking agent of the formula R.sub.m Si(OR.sup.1).sub.4-m where R is a monovalent hydrocarbon radical of 1 to 8 carbon atoms, R 1 is an acyl radical of 2 to 30 carbon atoms, and m is 0 or 1; (C) from 0.01 to 10 parts by weight of a curing promoter which is a salt of a carboxylic acid; and (D) about 4 parts by weight of a magnesium or zinc salt of a carboxylic acid as an acid scavenger.
Claim 2
Dependent Claim
143 words
A process for forming a one component RTV silicone rubber composition with good bonding properties at high humidity conditions, comprising: (1) mixing (A) 100 parts by weight of a silanol end-stopped diorganopolysiloxane polymer having a viscosity from 100 to 1,000,000 centipoise at 25° C. where the organo groups are monovalent hydrocarbon radicals; (B) from 0.1 to 10 parts by weight of an acyloxy functional cross-linking agent of the formula R.sub.m Si(OR.sup.1).sub.4-m where R is a monovalent hydrocarbon radical of 1 to 8 carbon atoms, R 1 is an acyl radical of 2 to 30 carbon atoms, and m is 0 or 1; (C) from 0.01 to 10 parts by weight of a curing promoter which is a salt of a carboxylic acid; and (D) about 4 parts by weight of a magnesium or zinc salt of a carboxylic acid as an acid scavenger.
Claim 3
Dependent Claim
143 words
A process for forming a one-component RTV silicone rubber composition with good bonding properties even at high humidity conditions, comprising: (1) mixing (A) 100 parts by weight of a silanol end-stopped diorganopolysiloxane polymer having a viscosity from 100 to 1,000,000 centipoise at 25° C., where the organo groups are monovalent hydrocarbon radicals; (B) from 0.1 to 10 parts by weight of an acyloxy functional cross-linking agent of the formula R.sub.m Si(OR.sup.1).sub.4-m where R is a monovalent hydrocarbon radical of 1 to 8 carbon atoms and R 1 is an acyl radical of 2 to 30 carbon atoms, m is 0 or 1; (C) from 0.01 to 10 parts by weight of a curing promoter which is a metal salt of carboxylic acid; and (D) about 4 parts by weight of acid scavenger selected from the group consisting of zinc stearate and magnesium stearate.
Claim 4
Dependent Claim
143 words
A process for forming a one-component RTV silicone rubber composition with good bonding properties even at high humidity conditions, comprising: (1) mixing (A) 100 parts by weight of a silanol end-stopped diorganopolysiloxane polymer having a viscosity from 100 to 1,000,000 centipoise at 25° C., where the organo groups are monovalent hydrocarbon radicals; (B) from 0.1 to 10 parts by weight of an acyloxy functional cross-linking agent of the formula R.sub.m Si(OR.sup.1).sub.4-m where R is a monovalent hydrocarbon radical of 1 to 8 carbon atoms and R 1 is an acyl radical of 2 to 30 carbon atoms, m is 0 or 1; (C) from 0.01 to 10 parts by weight of a curing promoter which is a metal salt of carboxylic acid; and (D) about 4 parts by weight of acid scavenger selected from the group consisting of zinc stearate and magnesium stearate.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-07-13 | 1991-01-12 | 1991-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-13 | 1995-01-12 | 1995-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-07-13 | 1999-01-12 | 1999-07-14 | $7700.00 | Window Closed / Lapsed |