US4419402A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame retardant polyorganopolysiloxane resin compositions
Assignee: Dow Silicones Corp
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Filing: 1983-04-11
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Granted: 1983-12-06
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Expires: 2003-04-11
Abstract
Abstract Translucent polyorganosiloxane resin compositions exhibiting acceptable levels of flame retardancy contain from 1 to 10%, based on resin weight, of an organic halogen source in combination with finely divided glass particles. Translucent substrates coated with these resin compositions can be used in the exterior portions of buildings intended to be heated at least in part by solar energy.
Inventors
- 👤 Beth I. Gutek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:28
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/02; C08K3/00; C08K3/40; F; F24; F24S; F24S20/00; F24S20/60; F24S20/61; Y; Y02; Y02B; Y02B10/00; Y02B10/20; Y02E; Y02E10/00; Y02E10/40; Y02E10/44; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31609; Y10T428/31612; Y10T428/31652; Y10T428/31663; Y10T442/00; Y10T442/20; Y10T442/2631; Y10T442/2672; Y10T442/2705; Y10T442/2713
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
127 words
In an article of manufacture comprising a translucent fibrous substrate and a translucent coating on said substrate, said coating consisting essentially of a polyorganosiloxane resin and an effective amount of a flame retardant for said resin, the improvement comprising the presence in said resin of a flame retardant consisting essentially of from 1 to 10 parts by weight per 100 parts of said resin of an organic compound containing at least one halogen atom, selected from the group consisting of bromine and chlorine and from 5 to 150 parts by weight per 100 parts of said resin of glass particles having an average particle size of from 5 to 100 microns; the weight ratio of said organic compound to the glass particles being from 0.05 to 0.4.
Claim 2
Dependent Claim
127 words
In an article of manufacture comprising a translucent fibrous substrate and a translucent coating on said substrate, said coating consisting essentially of a polyorganosiloxane resin and an effective amount of a flame retardant for said resin, the improvement comprising the presence in said resin of a flame retardant consisting essentially of from 1 to 10 parts by weight per 100 parts of said resin of an organic compound containing at least one halogen atom, selected from the group consisting of bromine and chlorine and from 5 to 150 parts by weight per 100 parts of said resin of glass particles having an average particle size of from 5 to 100 microns; the weight ratio of said organic compound to the glass particles being from 0.05 to 0.4.
Claim 3
Dependent Claim
14 words
An article according to claim 1 wherein the fibrous substrate comprises woven glass fibers.
Claim 4
Dependent Claim
23 words
An article according to claim 2 wherein said fibrous substrate comprises glass fibers which are coated with a layer of an elastomeric polydiorganosiloxane.
Claim 5
Dependent Claim
115 words
An article according to claim 1 wherein the polyorganosiloxane resin is a block copolymer comprising (1) from 24 to 84 mole % of at least one block corresponding to formula I ##STR3## (2) from 11 to 68 mole % of at least one block wherein the repeating unit corresponds to formula II ##EQU2## (3) from 2 to 27 mole % of at least one end group of the formula R 4 SiO(OR 5 ) 3 where R 1 , R 2 , R 3 , R 4 and R 5 are identical or different hydrocarbyl groups, m represents an integer from 10 to 100 and the average value of n is from 1 to 4.
Claim 6
Dependent Claim
14 words
An article according to claim 4 wherein R 1 and R 2 are methyl.
Claim 7
Dependent Claim
25 words
An article according to claim 4 wherein R 1 , R 2 , R 4 and R 5 are methyl and R 3 is phenyl.
Claim 8
Dependent Claim
25 words
An article according to claim 4 wherein the repeating unit represented in formula I constitutes from 40 to 60% by weight of the polyorganosiloxane resin.
Claim 9
Dependent Claim
40 words
An article according to claim 1 wherein the average size of the glass particles is from 15 to 40 microns and the concentration of the particles is from 20 to 50 parts by weight per 100 parts of polyorganosiloxane resin.
Claim 10
Dependent Claim
53 words
An article according to claim 1 wherein the organic compound is selected from the group consisting of aromatic hydrocarbons, diphenyl oxide cycloaliphatic hydrocarbons, aliphatic hydrocarbons, mono- and polyfunctional alcohols, mono- and polyfunctional carboxylic acids, esters of mono- and polyfunctional carboxylic acids and esters of mono- and polyfunctional alcohols with inorganic or carboxylic acids.
Claim 11
Dependent Claim
14 words
An article according to claim 9 wherein the inorganic acid is a phosphorus-containing acid.
Claim 12
Dependent Claim
11 words
An article according to claim 1 wherein the halogen is bromine.
Claim 13
Dependent Claim
17 words
An article according to claim 9 wherein the organic compound is an aromatic hydrocarbon or diphenyl oxide.
Claim 14
Dependent Claim
25 words
An article according to claim 12 wherein the organic compound is biphenyl or diphenyl oxide and contains from 6 to 10 bromine atoms per molecule.
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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) | 1986-12-05 | 1987-06-06 | 1987-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-05 | 1991-06-06 | 1991-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-05 | 1995-06-06 | 1995-12-06 | $7700.00 | Window Closed / Lapsed |