US4289672A
Expired / Lapsed
US
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Sizing glass fibers for thermoplastic resin reinforcement
Assignee: Bayer AG
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Filing: 1979-02-21
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Granted: 1981-09-15
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Expires: 1999-02-21
Abstract
Abstract Glass fibers for reinforcing thermoplastic resins are sized with an aqueous dispersion comprising a polyurethane-ionomer as a film-forming agent and a bonding agent comprising an epoxy-containing alkoxysilane. Advantageously the polyurethane is a very small particle ionomer and the bonding agent is selected from the group consisting of (a) an epoxyalkyl alkoxysilane+an aminoalkyl alkoxysilane, (b) an epoxyalkyl alkoxysilane+a low-molecular weight aliphatic primary or secondary mono-amine, (c) an aminoalkyl alkoxysilane+a low-molecular weight monoepoxide, and (d) an epoxyalkyl alkoxysilane.
Inventors
- 👤 Klaus Friederich
- 👤 Gerhard Heinze
- 👤 Helmut Reiff
- 👤 Dietrich Michael
- 👤 Manfred Schon
- 👤 Peter Markusch
- 👤 Ulrich Haberland
- 👤 Dieter Dieterich
- 👤 Josef Merten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:30
CPC Classifications
C; C03; C03C; C03C25/00; C03C25/10; C03C25/24; C03C25/26; C03C25/32; C03C25/326; C08; C08J; C08J5/00; C08J5/04; C08J5/06; C08J5/08; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2938
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
105 words
An aqueous dispersion suitable for use as a sizing composition for glass fibers comprising a polyurethane anionomer as a film-forming agent, said polyurethane anionomer being characterized by (a) an average particle size of about 0.05μ to 0.5μ, (b) an ionic group content of about 5 to 30 milliequivalents per 100 g, and (c) forming a film when dried, this film having a tensile strength of at least about 50 kp/cm 2 , an elongation at break of about 100-600%, a Shore-A-hardness of about 50-90, a swelling in water of less than about 30%, and being insoluble in 80% aqueous tetrahydrofuran after heating to 140° C.
Claim 2
Dependent Claim
105 words
An aqueous dispersion suitable for use as a sizing composition for glass fibers comprising a polyurethane anionomer as a film-forming agent, said polyurethane anionomer being characterized by (a) an average particle size of about 0.05μ to 0.5μ, (b) an ionic group content of about 5 to 30 milliequivalents per 100 g, and (c) forming a film when dried, this film having a tensile strength of at least about 50 kp/cm 2 , an elongation at break of about 100-600%, a Shore-A-hardness of about 50-90, a swelling in water of less than about 30%, and being insoluble in 80% aqueous tetrahydrofuran after heating to 140° C.
Claim 3
Dependent Claim
78 words
An aqueous dispersion according to claim 1, wherein the polyurethane-anionomer is present in a concentration of about 1 to 15% by weight, the aqueous dispersion further containing an epoxy-containing bonding agent, said bonding agent being present in a concentration of about 0.05 to 1.5% by weight and being selected from the group consisting of (a) an epoxyalkyl alkoxysilane+an aminoalkyl-alkoxysilane, (b) an epoxyalkyl alkoxysilane+an aliphatic primary or secondary mono-amine, (c) an aminoalkyl alkoxysilane+a monoepoxide, and (d) an epoxyalkyl alkoxysilane.
Claim 4
Dependent Claim
32 words
An aqueous dispersion according to claim 1, wherein the polyurethane anionomer of the disperse phase is at least partly microgel in character, which microgel is fully reacted and contains no reactive groups.
Claim 5
Dependent Claim
22 words
An aqueous dispersion according to claim 1, wherein the polyurethane anionomer of the disperse phase contains reactive groups or reactive crosslinking agents.
Claim 6
Dependent Claim
22 words
An aqueous dispersion according to claim 4, containing about 0.1 to 10% of formaldehyde based on polyurethane solids as a crosslinking agent.
Claim 7
Dependent Claim
11 words
Glass fiber sized with a polyurethane anionomer according to claim 1.
Claim 8
Dependent Claim
25 words
E-glass fiber sized with a dispersion according to claim 2 and carrying about 0.4 to 2% by weight of polyurethane anionomer plus epoxy-containing bonding agent.
Claim 9
Dependent Claim
21 words
A thermoplastic resin selected from the group consisting of polyamides, polycarbonates and polyesters reinforced with E-glass fiber according to claim 6.
Claim 10
Dependent Claim
118 words
An aqueous dispersion suitable for use as a sizing composition for glass fibers comprising a polyurethane cationomer obtained from aliphatic and/or cycloaliphatic diisocyanates and phthalic ester groups containing polyhydroxy compounds as a film-forming agent, said polyurethane cationomer being characterized by (a) an average particle size of about 0.05μ to 0.5μ, (b) an ionic group content of about 5 to 30 milliequivalents per 100 g, and (c) forming a film when dried, this film having a tensile strength of al least about 50 kp/cm 2 , an elongation at break of about 100-600%, a Shore-A-hardness of about 50-90, a swelling in water of less than about 30%, and being insoluble in 80% aqueous tetrahydrofuran after heating to 140° C.
Claim 11
Dependent Claim
118 words
An aqueous dispersion suitable for use as a sizing composition for glass fibers comprising a polyurethane cationomer obtained from aliphatic and/or cycloaliphatic diisocyanates and phthalic ester groups containing polyhydroxy compounds as a film-forming agent, said polyurethane cationomer being characterized by (a) an average particle size of about 0.05μ to 0.5μ, (b) an ionic group content of about 5 to 30 milliequivalents per 100 g, and (c) forming a film when dried, this film having a tensile strength of al least about 50 kp/cm 2 , an elongation at break of about 100-600%, a Shore-A-hardness of about 50-90, a swelling in water of less than about 30%, and being insoluble in 80% aqueous tetrahydrofuran after heating to 140° C.
Claim 12
Dependent Claim
82 words
An aqueous dispersion according to claim 9, wherein the polyurethane-cationomer is present in a concentration of about 1 to 15% by weight, the aqueous dispersion further containing an epoxy-containing bonding agent, said bonding agent being present in a concentration of about 0.05 to 1.5% by weight and being selected from the group consisting of (a) an epoxyalkyl alkoxysilane+an aminoalkyl-alkoxysilane, (b) an epoxyalkyl alkoxysilane+a low-molecular weight aliphatic primary or secondary mono-amine, (c) an aminoalkyl alkoxysilane+a low-molecular weight monoepoxide, and (d) an epoxyalkyl alkoxysilane.
Claim 13
Dependent Claim
32 words
An aqueous dispersion according to claim 9, wherein the polyurethane cationomer of the disperse phase is at least partly microgel in character, which microgel is fully reacted and contains no reactive groups.
Claim 14
Dependent Claim
22 words
An aqueous dispersion according to claim 9, wherein the polyurethane cationomer of the disperse phase contains reactive groups or reactive crosslinking agents.
Claim 15
Dependent Claim
22 words
An aqueous dispersion according to claim 12, containing about 0.1 to 10% of formaldehyde based on polyurethane solids as a crosslinking agent.
Claim 16
Dependent Claim
11 words
Glass fiber sized with a polyurethane cationomer according to claim 9.
Claim 17
Dependent Claim
25 words
E-glass fiber sized with a dispersion according to claim 10, and carrying about 0.4 to 2% by weight of polyurethane cationomer plus epoxy-containing bonding agent.
Claim 18
Dependent Claim
21 words
A thermoplastic resin selected from the group consisting of polyamides, polycarbonates and polyesters reinforced with E-glass fiber according to claim 14.
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) | 1984-09-14 | 1985-03-16 | 1985-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-14 | 1989-03-16 | 1989-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-14 | 1993-03-16 | 1993-09-15 | $7700.00 | Window Closed / Lapsed |