US3954490A
Expired / Lapsed
US
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Coating compositions for glass fibres
Assignee: Pilkington Group Ltd
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Filing: 1974-07-03
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Granted: 1976-05-04
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Expires: 1994-07-03
Abstract
Abstract A cementitious product and production method wherein the product comprises cement with reinforcing glass fibres therein which are coated with a composition which consists essentially of a protective material to reduce deterioration of the glass fibres, the material being a monocyclic or polycyclic aromatic compound which has at least three hydroxyl groups on the aromatic ring, or when a polycyclic compound is employed, on at least one of the aromatic rings. Preferably, the aromatic compound is soluble in a calcium hydroxide solution, and a preferred such compound is pyrogallol. The composition can also contain a film-forming agent such as a polyvinyl acetate of cationic character or a polyethylene glycol of non-ionic character, as well as a linking agent such as a silane.
Inventors
- 👤 David Ralph Cockram
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:18
CPC Classifications
C; C03; C03C; C03C25/00; C03C25/10; C03C25/1025; C03C25/103; C03C13/00; C03C13/001; C03C13/002; C04; C04B; C04B20/00; C04B20/10; C04B20/1018; C04B20/12; C04B24/00; C04B24/02; C04B24/24; C04B24/38
Claims Analysis
Total Claims: 40
Claim 1
Independent Claim
64 words
A cementitious product comprising cement and, as reinforcement, glass fibres coated with a composition which consists essentially of a protective material to reduce deterioration of the glass fibres, said protective material being a monocyclic or polycyclic aromatic compound which has at least three hydroxyl groups on the aromatic ring or when a polycyclic compound is employed, on at least one of the aromatic rings.
Claim 2
Dependent Claim
64 words
A cementitious product comprising cement and, as reinforcement, glass fibres coated with a composition which consists essentially of a protective material to reduce deterioration of the glass fibres, said protective material being a monocyclic or polycyclic aromatic compound which has at least three hydroxyl groups on the aromatic ring or when a polycyclic compound is employed, on at least one of the aromatic rings.
Claim 3
Dependent Claim
18 words
A cementitious product according to claim 1, wherein the aromatic compound is soluble in a calcium hydroxide solution.
Claim 4
Dependent Claim
26 words
A cementitious product according to claim 1, wherein the aromatic compound is a monocyclic 6-membered-ring compound having at least three hydroxyl groups substituted in the ring.
Claim 5
Dependent Claim
13 words
A cementitious product according to claim 3, wherein the aromatic compound is pyrogallol.
Claim 6
Dependent Claim
14 words
A cementitious product according to claim 3, wherein the aromatic compound is hydroxy hydroquinone.
Claim 7
Dependent Claim
13 words
A cementitious product according to claim 3, wherein the aromatic compound is phloroglucinol.
Claim 8
Dependent Claim
35 words
A cementitious product according to claim 1, wherein the aromatic compound is a product obtained by oxidation in alkaline solution of a monocyclic 6-membered-ring compound having at least three hydroxyl groups substituted in the ring.
Claim 9
Dependent Claim
18 words
A cementitious product according to claim 7, wherein the aromatic compound is an ammonium oxidation salt of pyrogallol.
Claim 10
Dependent Claim
40 words
A cementitious product according to claim 1, wherein the aromatic compound is a monocyclic 6-membered-ring compound having at least three hydroxyl groups and at least one other group substituted in the ring, or a carboxylic acid salt or ester thereof.
Claim 11
Dependent Claim
15 words
A cementitious product according to claim 9, wherein the aromatic compound is 2,3,4 tri-hydroxybenzoic acid.
Claim 12
Dependent Claim
17 words
A cementitious product according to claim 9, wherein the aromatic compound is 3,4,5 tri-hydroxybenzoic acid (gallic acid).
Claim 13
Dependent Claim
12 words
A according to claim 9, wherein the aromatic compound is propyl gallate.
Claim 14
Dependent Claim
15 words
A cementitious product according to claim 9, wherein the aromatic compound is 2,4,6 tri-hydroxybenzoic acid.
Claim 15
Dependent Claim
14 words
A cementitious product according to claim 9, wherein the aromatic compound is 2,4,6 tri-hydroxybenzaldehyde.
Claim 16
Dependent Claim
14 words
A cementitious product according to claim 9, wherein the aromatic compound is 2,3,4 tri-hydroxyacetophenone.
Claim 17
Dependent Claim
14 words
A cementitious product according to claim 9, wherein the aromatic compound is 2,4,6 tri-hydroxyacetophenone.
Claim 18
Dependent Claim
14 words
A cementitious product according to claim 9, wherein the aromatic compound is tetrahydroxy-p-quinone dihydrate.
Claim 19
Dependent Claim
41 words
A cementitions product according to claim 1, wherein the aromatic compound is a product obtained by oxidation in alkaline solution of a monocyclic 6-membered-ring compound having at least three hydroxyl groups and at least one other group substituted in the ring.
Claim 20
Dependent Claim
19 words
A cementitious product according to claim 18, wherein the aromatic compound is an ammonium oxidation salt of gallic acid.
Claim 21
Dependent Claim
35 words
A cementitious product according to claim 1, wherein the aromatic compound is a hetero-monocyclic 6-membered-ring aromatic compound having two nitrogen atoms within the ring and at least three hydroxyl groups as substituents in the ring.
Claim 22
Dependent Claim
16 words
A cementitious product according to claim 20, wherein the aromatic compound is 2,4,6 tri-hydroxypyrimidine (barbituric acid).
Claim 23
Dependent Claim
28 words
A cementitious product according to claim 1, wherein the aromatic compound is a polycyclic aromatic hydrocarbon having at least three hydroxyl groups substituted in a single 6-membered ring.
Claim 24
Dependent Claim
13 words
A cementitious product according to claim 22, wherein the aromatic compound is purpurogallin.
Claim 25
Dependent Claim
15 words
A cementitious product according to claim 22, wherein the aromatic compound is 1,2,4 tri-hydroxyanthraquinone (purpurin).
Claim 26
Dependent Claim
15 words
A cementitious product according to claim 22, wherein the aromatic compound is 2,4,6 tri-hydroxy benzophenone.
Claim 27
Dependent Claim
14 words
A cementitious product according to claim 22, wherein the aromatic compound is tannic acid.
Claim 28
Dependent Claim
17 words
A cementitious product according to claim 22, wherein the aromatic compound is a naturally occurring vegetable tannin.
Claim 29
Dependent Claim
19 words
A cementitious product according to claim 1, wherein said composition further contains a film-forming agent and a linking agent.
Claim 30
Dependent Claim
18 words
A cementitious product according to claim 28, wherein the film-forming agent comprises a polyvinyl acetate of cationic character.
Claim 31
Dependent Claim
18 words
A cementitious product according to claim 28, wherein the film-forming agent comprises a polyethylene glycol of non-ionic character.
Claim 32
Dependent Claim
14 words
A cementitious product according to claim 28, wherein the linking agent is a silane.
Claim 33
Dependent Claim
24 words
A cementitious product according to claim 1, said fibres being formed from an alkali-resistant glass containing at least 5 mol % ZrO 2 .
Claim 34
Dependent Claim
26 words
A cementitious product according to claim 32, said glass fibres having a further protective coating applied after the glass fibres have been coated with said composition.
Claim 35
Dependent Claim
17 words
A cementitious product according to claim 33, wherein said further protective coating is an epoxy resin polymer.
Claim 36
Independent Claim
85 words
A method of forming a glass fibre reinforced cementitious product, said method comprising the steps of coating glass fibres with a composition which consists essentially of a protective material to reduce deterioration of the glass fibres, said protective material being a monocyclic or polycyclic aromatic compound which has at least three hydroxyl groups on the aromatic ring or when a polycyclic compound is employed, on at least one of the aromatic rings, and subsequently incorporating said coated glass fibres into a cementitious matrix comprising cement.
Claim 37
Independent Claim
85 words
A method of forming a glass fibre reinforced cementitious product, said method comprising the steps of coating glass fibres with a composition which consists essentially of a protective material to reduce deterioration of the glass fibres, said protective material being a monocyclic or polycyclic aromatic compound which has at least three hydroxyl groups on the aromatic ring or when a polycyclic compound is employed, on at least one of the aromatic rings, and subsequently incorporating said coated glass fibres into a cementitious matrix comprising cement.
Claim 38
Dependent Claim
30 words
A method according to claim 35, comprising applying the coating composition as a size to the individual glass fibres immediately after they have been drawn from the molten glass composition.
Claim 39
Dependent Claim
26 words
A method according to claim 35, comprising applying the coating composition to the glass fibres after sizing and combination of the individual fibres into a strand.
Claim 40
Dependent Claim
25 words
A method according to claim 35, wherein said glass fibres are of an alkali-resistant glass composition containing at least 5 mol % ZrO 2 .
References Cited (Backward Citations)
US2793130A
Cited
US3758319A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-05-04 | 1979-11-03 | 1980-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-04 | 1983-11-03 | 1984-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-04 | 1987-11-03 | 1988-05-04 | $7700.00 | Window Closed / Lapsed |