US4374177A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aqueous sizing composition for glass fibers and sized glass fibers for thermoplastic reinforcement
Assignee: PPG Industries Ohio Inc
•
Filing: 1981-12-24
•
Granted: 1983-02-15
•
Expires: 2001-12-24
Abstract
Abstract Glass fibers reinforced polymeric polymers can be produced with high strength properties such as tensile strength, flexural strength and impact strength by using sized glass fiber strands of the present invention. The sized glass fiber strands have a residue of an aqueous sizing composition comprising: aqueous dispersible, emulsifiable, or solubilizable polyurethane polymer, polyepoxide polymer, polyethylene-containing polymer, and wax, where the weight ratio of the polyethylene containing polymer to the wax is in the range of about 25 to 1 to about 1 to 25, and one or more amino silane coupling agents. In addition to the amino silane coupling agent, the sizing composition may have an epoxy silane coupling agent and/or a lubricant modified silane coupling agent. The wax can be deleted from the composition, when the polyethylene-containing polymer has limited branching. The sized glass fiber strands can be produced by conventional forming process or by a wet chopped glass fiber forming process.
Inventors
- 👤 Ed C. Hsu
- 👤 L. Dow Moore
- 👤 Chester S. Temple
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:28
CPC Classifications
C; C03; C03C; C03C25/00; C03C25/10; C03C25/24; C03C25/26; C08; C08J; C08J5/00; C08J5/04; C08J5/06; C08J5/08; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2964
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
83 words
An aqueous sizing composition for glass fibers used for reinforcing polymers, comprising: a. a polyurethane polymer, b. a epoxy polymer, c. a polyethylene-containing polymer, d. wax where the weight ratio of the polyethylene-containing polymer to wax is in the range of about 25 to 1 to about 1 to 25, and e. an amino silane coupling agent, and f. water in an amount to give a total solids content for the composition in the range of about 1 to about 30 weight percent.
Claim 2
Dependent Claim
83 words
An aqueous sizing composition for glass fibers used for reinforcing polymers, comprising: a. a polyurethane polymer, b. a epoxy polymer, c. a polyethylene-containing polymer, d. wax where the weight ratio of the polyethylene-containing polymer to wax is in the range of about 25 to 1 to about 1 to 25, and e. an amino silane coupling agent, and f. water in an amount to give a total solids content for the composition in the range of about 1 to about 30 weight percent.
Claim 3
Dependent Claim
15 words
Aqueous sizing composition of claim 1 wherein the polyurethane polymer is substantially aliphatic and/or alicyclic.
Claim 4
Dependent Claim
15 words
Aqueous sizing composition of claim 1 which includes a lubricant modified amino silane coupling agent.
Claim 5
Dependent Claim
14 words
Aqueous sizing composition of claim 1 which includes an epoxy containing silane coupling agent.
Claim 6
Dependent Claim
20 words
Aqueous sizing composition according to claim 1 wherein the polyurethane and epoxy polymers are present as an epoxidized polyurethane copolymer.
Claim 7
Dependent Claim
12 words
Aqueous sizing composition of claim 1 wherein the polyurethane polymer has carboxylation.
Claim 8
Dependent Claim
23 words
Epoxy polymer of claim 1 that has a molecular weight in the range of about 170 to 900 (number average or weight average).
Claim 9
Dependent Claim
47 words
Aqueous sizing composition of claim 1 wherein the polyethylene-containing polymer is selected from high density polyethylene, medium density polyethylene, low density polyethylene, ultra-high molecular weight polyethylene, polyethylene-1-olefin copolymers and polyethylene, polypropylene copolymer where polyethylene is present in the major amount in the copolymers and degradation derivatives thereof.
Claim 10
Dependent Claim
17 words
Aqueous sizing composition of claim 1 wherein the wax has a melting point above about 50° C.
Claim 11
Dependent Claim
13 words
Aqueous sizing composition of claim 1 wherein the amino silane is gamma-aminopropyltriethoxy silane.
Claim 12
Dependent Claim
17 words
Aqueous sizing composition of claim 1 wherein the lubricant modified amino silane coupling agent is gamma-aminopropyltriethoxy silane.
Claim 13
Dependent Claim
12 words
Aqueous sizing composition of claim 1 wherein the epoxy-containing silane is gamma-glycidylpropyltrimethoxysilane.
Claim 14
Dependent Claim
12 words
Sized glass fiber strand containing the aqueous sizing composition of claim 1.
Claim 15
Dependent Claim
23 words
Dried chopped glass fiber strands having an LOI in the range of about 0.1 to 3 of the sizing composition of claim 1.
Claim 16
Dependent Claim
13 words
Wet chopped glass fiber strands having the aqueous sizing composition of claim 1.
Claim 17
Dependent Claim
13 words
Reinforced thermoplastic polymer having the sized glass fibers of claim 14 or 15.
Claim 18
Dependent Claim
33 words
Reinforced thermoplastic polymer of claim 16 wherein the thermoplastic polymer is selected from polypropylene; polyamide; saturated polyesters including polyethylene terephthalate and polybutylene terephthalate; polystyrene; phenoxy polyphenylene oxide; polyphenylene sulfide; polycarbonate, and acrylonitrile-butadiene-styrene terpolymer.
Claim 19
Dependent Claim
198 words
Aqueous sizing composition for glass fibers used to reinforce thermoplastic polymers, comprising: a. aqueous dispersion of substantially aliphatic and/or alicyclic polyurethane polymer, b. aqueous dispersion of 1,2-polyepoxide polymer with a molecular weight in the range of 170 to 900, where the weight ratio of polyurethane to epoxy is in the range of about 1 to about 10 to about 10 to about 1, c. aqueous dispersion of polyethylene-containing polymers selected from the group consisting of low density polyethylene, medium density polyethylene, high density polyethylene, ultra-high molecular weight polyethylene and polyethylene-polypropylene copolymer and polyethylene-1-olefin copolymer where polyethylene is present in a predominant amount of the copolymer and degradation derivatives thereof, d. paraffin wax with a melting point greater than 50° C., e. mixture of silane coupling agents having in weight percent of the mixture: 50 to about 95 weight percent of an amino silane coupling agent, about 5 to about 50 weight percent of an epoxy silane coupling agent and about 1 to about 10 weight percent of a lubricant modified amino silane coupling agent. f. water in an amount to give a total solids for the composition in the range of about 1 to about 30 weight percent.
Claim 20
Dependent Claim
198 words
Aqueous sizing composition for glass fibers used to reinforce thermoplastic polymers, comprising: a. aqueous dispersion of substantially aliphatic and/or alicyclic polyurethane polymer, b. aqueous dispersion of 1,2-polyepoxide polymer with a molecular weight in the range of 170 to 900, where the weight ratio of polyurethane to epoxy is in the range of about 1 to about 10 to about 10 to about 1, c. aqueous dispersion of polyethylene-containing polymers selected from the group consisting of low density polyethylene, medium density polyethylene, high density polyethylene, ultra-high molecular weight polyethylene and polyethylene-polypropylene copolymer and polyethylene-1-olefin copolymer where polyethylene is present in a predominant amount of the copolymer and degradation derivatives thereof, d. paraffin wax with a melting point greater than 50° C., e. mixture of silane coupling agents having in weight percent of the mixture: 50 to about 95 weight percent of an amino silane coupling agent, about 5 to about 50 weight percent of an epoxy silane coupling agent and about 1 to about 10 weight percent of a lubricant modified amino silane coupling agent. f. water in an amount to give a total solids for the composition in the range of about 1 to about 30 weight percent.
Claim 21
Dependent Claim
14 words
Aqueous sizing composition according to claim 18 wherein the polyurethane polymer contains carboxyl moieties.
Claim 22
Dependent Claim
18 words
Aqueous sizing composition of claim 18, wherein the epoxy polymer has a weight per epoxide of around 530.
Claim 23
Dependent Claim
21 words
Aqueous sizing composition of claim 18 wherein the amino silane is gamma-aminopropyltriethoxy silane and the epoxy silane is gamma-glycidoxy propyltrimethoxy silane.
Claim 24
Dependent Claim
16 words
Chopped glass fiber strand having the dried residue of the aqueous sizing composition of claim 18.
Claim 25
Dependent Claim
12 words
Chopped glass fiber strand having the aqueous sizing composition of claim 18.
Claim 26
Dependent Claim
44 words
Thermoplastic polymer reinforced with the glass fiber strands of claim 22 or 23 wherein the thermoplastic polymer is selected from the group consisting of polypropylene; polyamide; saturated polyester; including polyethylene terephthalate and polybutylene terephthalate; polystyrene; phenoxy; polyphenylene oxide; polyphenylene sulfide, polycarbonate, and acrylonitrile, styrene-butadiene-terpolymers.
Claim 27
Dependent Claim
224 words
Aqueous sizing composition for glass fibers produced in wet chopped forming process to reinforce thermoplastic polymer, comprising in weight percent of the aqueous sizing composition: a. about 0.1 to about 10 weight percent of substantially aliphatic and/or alicyclic polyurethane polymer having carboxyl moieties, b. about 0.1 to about 10 weight percent of a polyepoxide polymer with a molecular weight in the range of about 170 to about 900 wherein the weight ratio of the polyurethane to the epoxy polymer is about 5 to about 1 to about 1 to about 5, c. about 0.1 to about 7 weight percent of an aqueous dispersible, emulsifiable or solubilizable high density polyethylene polymer, d. about 0.01 to about 6 weight percent of a microcrystalline paraffinic wax having a melting point above about 50° C., wherein the weight ratio of the polyethylene polymer to the wax is in the range of about 25 to 1 to about 1 to 25, e. mixture of silane coupling agents in an amount of about 0.1 to about 2 weight percent with a predominant amount being gamma-aminopropyltriethoxysilane, and with a minor amount being gamma-glycidoxypropyl-trimethoxysilane and with the smallest amount being a lubricant modified gamma-aminopropyltriethoxy silane, f. water in an amount sufficient to give a total solids for the aqueous sizing composition in the range of about 2 to about 20 weight percent.
Claim 28
Dependent Claim
224 words
Aqueous sizing composition for glass fibers produced in wet chopped forming process to reinforce thermoplastic polymer, comprising in weight percent of the aqueous sizing composition: a. about 0.1 to about 10 weight percent of substantially aliphatic and/or alicyclic polyurethane polymer having carboxyl moieties, b. about 0.1 to about 10 weight percent of a polyepoxide polymer with a molecular weight in the range of about 170 to about 900 wherein the weight ratio of the polyurethane to the epoxy polymer is about 5 to about 1 to about 1 to about 5, c. about 0.1 to about 7 weight percent of an aqueous dispersible, emulsifiable or solubilizable high density polyethylene polymer, d. about 0.01 to about 6 weight percent of a microcrystalline paraffinic wax having a melting point above about 50° C., wherein the weight ratio of the polyethylene polymer to the wax is in the range of about 25 to 1 to about 1 to 25, e. mixture of silane coupling agents in an amount of about 0.1 to about 2 weight percent with a predominant amount being gamma-aminopropyltriethoxysilane, and with a minor amount being gamma-glycidoxypropyl-trimethoxysilane and with the smallest amount being a lubricant modified gamma-aminopropyltriethoxy silane, f. water in an amount sufficient to give a total solids for the aqueous sizing composition in the range of about 2 to about 20 weight percent.
Claim 29
Dependent Claim
16 words
Chopped glass fiber strands having the dried residue of the aqueous sizing composition of claim 25.
Claim 30
Dependent Claim
54 words
An aqueous sizing composition for treating glass fibers useful in reinforcing thermoplastic polymers, comprising: a. polyurethane polymer, b. epoxy polymer, c. polyethylene-containing polymer with limited branching, d. amino-silane coupling agent, and e. water in an amount to give a total solids for the composition in the range of 1 to about 30 weight percent.
Claim 31
Dependent Claim
54 words
An aqueous sizing composition for treating glass fibers useful in reinforcing thermoplastic polymers, comprising: a. polyurethane polymer, b. epoxy polymer, c. polyethylene-containing polymer with limited branching, d. amino-silane coupling agent, and e. water in an amount to give a total solids for the composition in the range of 1 to about 30 weight percent.
Claim 32
Dependent Claim
11 words
Glass fibers sized with the aqueous treating composition of claim 27.
References Cited (Backward Citations)
US3803069A
Cited
US3814592A
Cited
US3655353A
Cited
US3814715A
Cited
US3556754A
Cited
US3616185A
Cited
US3837892A
Cited
US3882068A
Cited
US3946132A
Cited
US3936415A
Cited
US4194940A
Cited
US4143006A
Cited
US4246145A
Cited
US4240944A
Cited
US4301052A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-02-14 | 1986-08-16 | 1987-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-14 | 1990-08-16 | 1991-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-14 | 1994-08-16 | 1995-02-15 | $7700.00 | Window Closed / Lapsed |