US3616181A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Moldable article of glass fibers and a modified phenolic binder
Assignee: Owens Corning
•
Filing: 1969-11-05
•
Granted: 1971-10-26
•
Expires: 1989-11-05
Abstract
Abstract A moldable article comprising a woollike mass of intermeshed glass fibers bonded to one another at points of contact by a phenolic binder. The binder is substantially dry and curable, and comprises from 40 percent to 91 percent of a curable phenolformaldehyde condensate, from 4 percent to 40 percent of urea and from 5 percent to 45 percent of dicyandiamide. Preferably, the binder additionally contains a thickening agent, as well as a siloxane or other release agent and emulsified petroleum oil to minimize sticking and resin build-up during molding of the article.
Inventors
- 👤 Joseph P Stalego
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:15
CPC Classifications
C; C08; C08G; C08G8/00; C08L; C08L61/00; C08L61/04; C08L61/06
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
26 words
A moldable article as claimed in claim 1 wherein the binder constitutes from about 5 percent to about 45 percent of the weight of the article.
Claim 2
Dependent Claim
23 words
A moldable article as claimed in claim 2 having an apparent density from about one-half pound to about 30 pounds per cubic foot.
Claim 3
Dependent Claim
31 words
A moldable article as claimed in claim 3 wherein the binder contains an amount of at least one thickening agent sufficient appreciably to increase the viscosity, body and film strength thereof.
Claim 4
Dependent Claim
34 words
A moldable article as claimed in claim 4 wherein the thickening agent comprises from one-half percent to about 25 percent of a polysaccharide, based upon the total weight of phenol-formaldehyde condensate, urea and dicyandiamide.
Claim 5
Dependent Claim
33 words
A moldable article as claimed in claim 4 wherein the thickening agent comprises from one-half percent to 25 percent of bone glue, based upon the total weight of phenol-formaldehyde condensate, urea and dicyandiamide.
Claim 6
Dependent Claim
39 words
A moldable article as claimed in claim 6 wherein the thickening agent additionally comprises from about 0.1 to about 1 percent of a polysaccharide supplemental thickening agent, based upon the total weight of the phenol-formaldehyde condensate, urea and dicyandiamide.
Claim 7
Dependent Claim
56 words
A moldable article as claimed in claim 5 wherein the binder includes, based upon the total weight of phenol-formaldehyde condensate, urea and dicyandiamide, from about 0.25 percent to about 3 percent of release agent effective to prevent adhesion between a heated mold surface and the binder during cure of the latter in contact with the former.
Claim 8
Dependent Claim
36 words
A moldable article as claimed in claim 8 wherein the binder includes, based upon the total weight of phenol-formaldehyde condensate, urea and dicyandiamide, from about 1 percent to about 10 percent of an emulsified petroleum oil.
Claim 9
Dependent Claim
56 words
A moldable article as claimed in claim 7 wherein the binder includes, based upon the total weight of phenol-formaldehyde condensate, urea and dicyandiamide, from about 0.25 percent to about 3 percent of release agent effective to prevent adhesion between a heated mold surface and the binder during cure of the latter in contact with the former.
Claim 10
Dependent Claim
27 words
A moldable article as claimed in claim 8 wherein the release agent is selected from the group consisting of methylpolysiloxane fluids and the monoethanolamide of ricinoleic acid.
Claim 11
Dependent Claim
27 words
A moldable article as claimed in claim 9 wherein the release agent is selected from the group consisting of methylpolysiloxane fluids and the monoethanolamide of ricinoleic acid.
Claim 12
Independent Claim
144 words
A method of making a moldable article comprising the steps of: a. forming glass fibers from molten streams of glass; b. projecting said fibers toward a collecting surface; c. introducing a curable phenolic binder into said projected fibers, wherein said phenolic binder comprises from 40 percent to 91 percent of a curable phenol-formaldehyde condensate, from 4 percent to 40 percent of urea and from 5 percent to 45 percent of dicyandiamide, based upon the total of phenol-formaldeHyde condensate, urea and dicyandiamide; d. depositing said projected fibers in association with said binder into a woollike mass of intermeshed fibers on said collecting surface; e. converting said binder associated with said woollike mass of fibers to a substantially nontacky, but uncured, state; and f. associating said woollike mass with an interleaving material whereby said woollike mass can be stored, shipped or otherwise handled prior to molding.
Claim 13
Independent Claim
183 words
A method of making a molded article comprising the steps of: a. forming glass fibers from molten streams of glass; b. projecting said fibers toward a collecting surface; c. introducing a curable phenolic binder into said projected fibers, wherein said phenolic binder comprises from 40 percent to 91 percent of a curable phenol-formaldehyde condensate, from 4 percent to 40 percent of urea and from 5 percent to 45 percent of dicyandiamide, based upon the total of phenol-formaldehyde condensate, urea and dicyandiamide; d. depositing said projected fibers in association with said binder into a woollike mass of intermeshed fibers on said collecting surface; e. converting said binder associated with said woollike mass of fibers to a substantially nontacky, but uncured, state; f. compressing said woollike mass to an apparent density of about 0.5 to about 30 pounds per cubic foot; g. cutting said woollike mass into the approximate size and shape of the molded article; and h. molding said woollike mass with heated molding means at a temperature sufficient to cure said binder to a hardened, infusible state and thereby produce the molded article.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |