US2003021993A1PendingUtilityA1
Coated fibers and process
Priority: Apr 9, 2001Filed: Apr 9, 2001Published: Jan 30, 2003
Est. expiryApr 9, 2021(expired)· nominal 20-yr term from priority
Inventors:Jay Bellasalma
C08J 5/08Y10T428/2933C03C 25/28C03C 25/36C08J 5/06
35
PatentIndex Score
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Cited by
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Claims
Abstract
This unique processing provides a unique mixture for coating reinforcements. Preferably, the mixture is an epoxy/polystyrene mixture developed for coating glass fiber reinforcements for thermoset resins such as polyesters. My processing threads a glass fiber roving through a series of threaders, eyelets and brakes. The glass then is coated and dried. After drying, the roving then is wrapped around chilled mandrels and chopped into an appropriate length. The coating is critical to the performance and cosmetic appearance of the part (molded product). The fiber after processing then is introduced into the resin matrix. The processing strips or shears the after coating from the fiber prior to molding.
Claims
exact text as granted — not AI-modifiedI claim:
1 . One or more fibers having at least a portion of their surfaces covered with an after coating composition wherein the after coating composition prevents the fibers from interacting with a plastic matrix and wherein the after coating composition is capable of being stripped or sheared from the fibers.
2 . One or more fibers having at least a portion of their surfaces covered with an after coating composition comprising a mixture of an epoxy resin and polystyrene, wherein the after coating composition is capable of being stripped or sheared from the fibers.
3 . Fibers according to claim 2 wherein the coating composition is a dried residue on the surfaces of the fibers.
4 . Fibers according to claim 2 wherein the epoxy resin is a reaction product of bisphenol A and epichlorohydrin.
5 . Fibers according to claim 2 wherein the polystyrene is homopolystyrene.
6 . Fibers according to claim 2 wherein the fibers are rovings, strands or yarns.
7 . Fibers according to claim 2 wherein the fibers are glass fibers.
8 . Fibers according to claim 2 wherein the fibers are glass fiber rovings.
9 . Fibers according to claim 2 wherein the coating composition is present on the fibers in an amount ranging from 1% to 15% by weight as a moisture reduced residue.
10 . Fibers according to claim 9 wherein the amount of coating composition ranges from 5 to 10 weight percent.
11 . Fibers according to claim 9 wherein the amount of coating composition ranges from 7% to 9% by weight.
12 . Fibers according to claim 1 wherein the coating composition comprises:
Material
Weight Percent
Epoxy polymer
20-60
Styrene polymer
5-50
13 . Fibers according to claim 1 wherein the coating composition comprises:
Material
Weight Percent
Vinyl ester
30-60
Styrene
5-50
14 . Fibers according to claim 13 wherein the coating composition also comprises:
Material
Weight Percent
Methyl methacrylate
5-40
Polycarbonate
5-50
Solvent
2-40
15 . Fibers according to claim 1 wherein the coating composition comprises:
Material
Weight Percent
Epoxy resin
20-40
Polystyrene
5-50
Solvent
2-40
16 . Fibers according to claim 1 wherein the coating composition comprises:
Material
Weight Percent
Isophtalic Unsaturated resin
30-60
Styrene
5-50
17 . Fibers according to claim 16 wherein the coating composition also comprises:
Material
Weight Percent
Methyl methacrylate
5-40
Polycarbonate
5-50
18 . Fibers according to claim 1 wherein the coating composition comprises:
Material
Weight Percent
Vinyl ester
50
Methyl methacrylate
19.8
Styrene
15
Solvent
2.1
19 . Fibers according to claim 1 wherein the coating composition comprises:
Material
Weight Percent
Epoxy resin
36
Polystyrene
20.0
Solvent
34.8
20 . Fibers according to claim 1 wherein the coating composition comprises:
Material
Weight Percent
Isophtalic unsaturated resin
50.0
Styrene
20.0
Polycarbonate
12
21 . A resin composition comprising a resin and the fibers of claim 1 .
22 . A resin composition according to claim 21 wherein the resin is a thermoset resin.
23 . A resin composition according to claim 21 wherein the resin is a polyester resin.
24 . A resin composition according to claim 21 wherein the polyester resin is a foamed polyester.
25 . A premix slurry comprising the resin composition of claim 23 wherein the after coating composition is stripped or sheared from the fibers.
26 . A compression molded product comprising the resin composition of claim 21 .
27 . A compression in molded product comprising the resin composition of claim 24 .
28 . A compression molded product comprising the resin composition of claim 25 .
29 . A process for coating one or more fibers having at least a portion of their surfaces covered, comprising the steps of:
applying an after coating composition to the surfaces of the fibers, wherein the after coating composition prevents the fibers from interacting with a plastic matrix and wherein the after coating composition is capable of being stripped or sheared from the glass fibers; drying the coated fibers; and chilling the dried fibers.
30 . A process for coating one or more fibers having at least a portion of their surfaces covered, comprising the steps of:
applying an after coating composition comprising a mixture of epoxy and polystyrene to the surfaces of the fibers, wherein the after coating composition is capable of being stripped or sheared from the glass fibers; drying the coated fibers; and chilling the dried fibers.
31 . A process according to claim 1 wherein the chilling is carried out at −20° F.
32 . A process according to claim 30 including the step of chopping the chilled fibers into appropriate lengths.
33 . A process for preparing a resin composition comprising the steps of admixing the fibers of claim 30 and a resin and subsequently stripping or shearing the after coating composition from the fibers after admixing with the resin.
34 . A process according to claim 33 wherein the admixing is carried out by blending.
35 . A process according to claim 33 wherein the shattering is carried out by tumbling.
36 . A process according to claim 30 including the step of the polystyrene of the coating composition dissolving the resin.Join the waitlist — get patent alerts
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