US4301052A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sizing composition and sized strand useful as reinforcement for reinforced molded composites having improved physical properties
Assignee: PPG Industries Inc
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Filing: 1979-09-04
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Granted: 1981-11-17
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Expires: 1999-09-04
Abstract
Abstract Sizing compositions having polyurethane latex, cationic silane having unsaturation and polyamino silane are provided. The compositions are used to treat glass fibers to produce sized glass fibers having improved physical properties such as integrity. The sized glass fibers when used with molding compounds yields molded articles with improved physical properties like tensile strength, flexural strength and articles with impact strength.
Inventors
- 👤 Gary A. Pollman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:10
CPC Classifications
C; C03; C03C; C03C25/00; C03C25/10; C03C25/24; C03C25/26; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2938
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
94 words
An aqueous sizing composition for use in treating glass fibers, to produce treated glass fibers having good integrity between fibers in strands and/or between strands, and good wet-through and wet-out and where the treated glass fibers are useful in producing reinforced molded composites having improved physical properties and, comprising in weight percent of the aqueous sizing composition: (a) about 2 to about 40 of curable polyurethane latex, (b) about 0.05 to about 2 of cationic silane having unsaturation, (c) about 0.05 to about 2 of polyamino silane, and (d) water in the remaining amount.
Claim 2
Dependent Claim
94 words
An aqueous sizing composition for use in treating glass fibers, to produce treated glass fibers having good integrity between fibers in strands and/or between strands, and good wet-through and wet-out and where the treated glass fibers are useful in producing reinforced molded composites having improved physical properties and, comprising in weight percent of the aqueous sizing composition: (a) about 2 to about 40 of curable polyurethane latex, (b) about 0.05 to about 2 of cationic silane having unsaturation, (c) about 0.05 to about 2 of polyamino silane, and (d) water in the remaining amount.
Claim 3
Dependent Claim
14 words
A sizing composition according to claim 1, which includes an organo silane coupling agent.
Claim 4
Dependent Claim
16 words
The sizing composition according to claim 1, which includes a curing agent for the polyurethane polymer.
Claim 5
Dependent Claim
11 words
The sizing composition according to claim 1, which includes melamine formaldehyde.
Claim 6
Dependent Claim
15 words
The sizing composition according to claim 1, wherein the polyurethane latex has a thermoplastic polyurethane.
Claim 7
Dependent Claim
23 words
The sizing composition according to claim 1 or claim 5, wherein the polyurethane latex has a total solids content of less than 70%.
Claim 8
Dependent Claim
31 words
The composition of claim 1 or claim 5, wherein the solids content of the polyurethane latex is in the range of about 55 to 65 percent by weight of the latex.
Claim 9
Dependent Claim
17 words
The sizing composition according to claim 1 or claim 5, wherein the cationic silane has methacrylate functionality.
Claim 10
Dependent Claim
22 words
The sizing composition according to claim 9, wherein the methacrylate functional cationic silane is the mono-addition product of ethylene dimethacrylate and methylaminopropytrimethoxysilane.
Claim 11
Dependent Claim
17 words
The sizing composition according to claim 1 or claim 5, wherein the cationic silane has vinyl functionality.
Claim 12
Dependent Claim
17 words
The sizing composition according to claim 1 or claim 5, wherein the cationic silane has styrenic functionality.
Claim 13
Dependent Claim
17 words
The sizing composition according to claim 1 or claim 5, wherein the polyamino silane is a diaminosilane.
Claim 14
Dependent Claim
29 words
The sizing composition of claims 1 or 5, wherein the total solids content of the sizing composition is in the range of about 1 to about 20 weight percent.
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) | 1984-11-16 | 1985-05-18 | 1985-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-16 | 1989-05-18 | 1989-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-16 | 1993-05-18 | 1993-11-17 | $7700.00 | Window Closed / Lapsed |