US3837892A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glass fiber reinforced elastomers
Assignee: Owens Corning
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Filing: 1972-01-28
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Granted: 1974-09-24
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Expires: 1992-01-28
Abstract
Abstract This invention is addressed to the improvement in the bonding relationship between glass fibers and elastomeric materials in which glass fibers are treated with a functional organo silicon compound containing at least one of an amino, a hydroxy or an epoxy group, and then the glass fibers are treated either with a polyurethane prepolymer containing free isocyanates or an organic polyisocyanate for subsequent reaction with free hydroxyl groups, or a polyurethane prepolymer or a polyhydroxylated compound. The polyurethane prepolymer containing free isocyanate groups may be prepared by reaction of excess polyisocyanate with a hydroxyl terminated polybutadiene or a polyhydroxylated polyester prepared by reaction of a polyol with a polycarboxylic acid of anhydride containing ethylenic unsaturation. These prepolymers are capable of undergoing co-cure or vulcanization with elastomeric material.
Inventors
- 👤 A Marzocchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:04
CPC Classifications
C; C03; C03C; C03C25/00; C03C25/10; C03C25/24; C03C25/26; C03C25/32; C03C25/326; C03C25/40; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2922; Y10T428/2933; Y10T428/2938; Y10T428/294; Y10T428/296; Y10T428/2962; Y10T428/2964
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
37 words
The method as defined in claim 1 wherein the prepolymer is prepared by reaction of a polyisocyanate with an organic polyhydroxylated compound in which the mole ratio of isocyanate groups to hydroxyl groups is at least 1.5.
Claim 2
Dependent Claim
25 words
The method as defined in claim 2 wherein the mole ratio of isocyanate groups to hydroxyl groups is within the range of 2 to 4.
Claim 3
Dependent Claim
79 words
The method as defined in claim 1 wherein the organo silicon compound is selected from the group consisting of a silane of the formula Z(4 n) Si Rn wherein Z is a readily hydrolyzable group, n is an integer from 1 to 3 and R represents an organic group containing two to eight carbon atoms in which at least one of the R group is substituted by at least one of said functional groups, the corresponding silanols and polysiloxanes.
Claim 4
Dependent Claim
39 words
The method as defined in claim 1 wherein the prepolymer is prepared by reaction of a polyisocyanate with a polyhydroxylated compound containing ethylenic unsaturation whereby the prepolymer is capable of undergoing care and/or vulcanization in combination with elastomeric material.
Claim 5
Dependent Claim
15 words
The method as defined in claim 5 wherein the polyhydroxylated compound is a hydroxyl-terminated polybutadiene.
Claim 6
Dependent Claim
30 words
The method as defined in claim 5 wherein the polyhydroxylated compound is a polyhydroxylated polyester prepared by reaction of a polyol with a polycarboxylic acid or anhydride containing ethylenic unsaturation.
Claim 7
Dependent Claim
17 words
The method as defined in claim 1 wherein the bundles are formed of strands of glass fibers.
Claim 8
Dependent Claim
137 words
Glass fibers having a first coating on the surfaces thereof comprising an organo silicon compound containing at least one organic group substituted by at least one functional group selected from the group consisting of an amino group, a hydroxy group and an epoxy group, said glass fibers being in the form of a bundle and containing an impregnant in the bundle comprising a polyurethane prepolymer prepared by reaction of excess polyisocyanate with a polyhydroxylated compound selected from the group consisting of a hydroxyl terminated polybutadiene and a polyhydroxylated polyester prepared by reaction of a polyol with a polycarboxylic acid or anhydride containing ethylenic unsaturation, whereby the free isocyanate groups of the prepolymer have reacted with the functional group of the organo silicon compound and the prepolymer is capable of undergoing co-cure or vulcanization with an elastomeric material.
Claim 9
Dependent Claim
37 words
Glass fibers as defined in claim 9 wherein the prepolymer is prepared by reaction of a polyisocyanate with an organic polyhydroxylated compound in which the mole ratio of isocyanate groups to hydroxyl groups is at least 1.5.
Claim 10
Dependent Claim
79 words
Glass fibers as defined in claim 9 wherein the organo silicon compound is selected from the group consisting of a silane of the formula Z(4 n) Si Rn wherein Z is a readily hydrolyzable group, n is an integer from 1 to 3 and R represents an organic group containing two to eight carbon atoms in which at least one of the R group is substituted by at leas one of said functional groups, the corresponding silanols and polysiloxanes.
Claim 11
Dependent Claim
15 words
Glass fibers are defined in claim 9 wherein the polyhydroxylated compound is a hydroxyl-terminated polybutadiene.
Claim 12
Dependent Claim
30 words
Glass fibers as defined in claim 9 wherein the polyhydroxylated compound is a polyhydroxylated polyester prepared by reaction of a polyol with a polycarboxylic acid or anhydride containing ethylenic unsaturation.
Claim 13
Dependent Claim
18 words
Glass fibers as defined in claim 9 wherein the strands of glass fibers are plied and twisted together.
Claim 14
Dependent Claim
167 words
In a glass fiber reinforced elastomeric product in which an elastomeric material constitutes a continuous phase in which the glass fibers are distributed, the improvement in the bonding relationship between the glass fibers and the elastomeric material comprising a bundle of glass fibers having a first coating on the surface thereof comprising an organo silicon compound containing at least one organic group substituted by at least one functional group selected from the group consisting of an amino group, a hydroxy group and an epoxy group, and an impregnant in the bundle comprising a polyurethane prepolymer prepared by reaction of excess polyisocyanate with a polyhydroxylated compound selected from the group consisting of a hydroxyl terminated polybutadiene and a polyhydroxylated polyester prepared by reaction of a polyol with a polycarboxylic acid or anhydride containing ethylenic unsaturation, whereby the free isocyanate groups of the prepolymer have reacted with the functional group of the organo silicon compound and the prepolymer is capable of undergoing co-cure or vulcanization with an elastomeric material.
Claim 15
Dependent Claim
31 words
In a glass fiber reinforced elastomeric product as defined in claim 15 wherein the bundle is in the form of strands of glass fibers which have been plied and twisted together.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-23 | 1978-03-25 | 1978-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-23 | 1982-03-25 | 1982-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-23 | 1986-03-25 | 1986-09-24 | $7700.00 | Window Closed / Lapsed |