Patent US4110397A successfully refreshed from Google Patents.
US4110397A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite bodies or sheets
Assignee: Imperial Chemical Industries Ltd
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Filing: 1977-03-25
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Granted: 1978-08-29
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Expires: 1997-03-25
Abstract
Abstract An improvement is provided in moulding processes for composite bodies or sheets, especially chipboard, made from mouldable compositions in which an isocyanate-based binding agent is used, the improvement being the provision of a metallic soap at the interface of the composition and mould surface to assist release.
Inventors
- 👤 Alan M. Wooler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:52
CPC Classifications
B; B27; B27N; B27N3/00; B27N3/08; B27N3/083; B29; B29C; B29C33/00; B29C33/56; B29C33/60; C; C10; C10M; C10M2201/00; C10M2201/02; C10M2207/00; C10M2207/10; C10M2207/12; C10M2207/125; C10M2207/129; C10N; C10N2010/00; C10N2010/04; C10N2010/06
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
73 words
In a process for the manufacture of composite bodies or sheets comprising the steps of (a) mixing together a filler material and an isocyanate-based binding agent to form a mouldable composition; (b) introducing said composition to a mould and shaping said composition therein; and (c) thereafter releasing said shaped composition from said mould; the improvement which comprises providing a film of a metallic soap between said composition and said mould to assist release.
Claim 2
Dependent Claim
73 words
In a process for the manufacture of composite bodies or sheets comprising the steps of (a) mixing together a filler material and an isocyanate-based binding agent to form a mouldable composition; (b) introducing said composition to a mould and shaping said composition therein; and (c) thereafter releasing said shaped composition from said mould; the improvement which comprises providing a film of a metallic soap between said composition and said mould to assist release.
Claim 3
Dependent Claim
80 words
In a process for the manufacture of a composite sheet comprising the steps of (a) mixing together a lignocellulosic material and an isocyanate-based binding agent to form a compressible composition; (b) introducing said compressible composition between press platens; (c) compressing said composition at an elevated temperature to form a composite sheet; and (d) thereafter releasing said sheet from between said platens; the improvement which comprises providing a film of metallic soap between said composition and said platens to assist release.
Claim 4
Dependent Claim
80 words
In a process for the manufacture of a composite sheet comprising the steps of (a) mixing together a lignocellulosic material and an isocyanate-based binding agent to form a compressible composition; (b) introducing said compressible composition between press platens; (c) compressing said composition at an elevated temperature to form a composite sheet; and (d) thereafter releasing said sheet from between said platens; the improvement which comprises providing a film of metallic soap between said composition and said platens to assist release.
Claim 5
Dependent Claim
26 words
A process according to claim 2 wherein the metallic soap is a metal salt of a long-chain fatty acid containing from 10 to 26 carbon atoms.
Claim 6
Dependent Claim
18 words
A process according to claim 3 wherein the metal salt is an alkaline earth or heavy metal salt.
Claim 7
Dependent Claim
14 words
A process according to claim 2 wherein the metallic soap is a metal stearate.
Claim 8
Dependent Claim
23 words
A process according to claim 2 wherein the metallic soap is selected from the group consisting of aluminium, calcium, zinc and iron stearates.
Claim 9
Dependent Claim
19 words
A process according to claim 2 wherein the metallic soap has a melting point less than the process temperature.
Claim 10
Dependent Claim
31 words
A process according to claim 2 wherein the composition is compressed between steel platens at a temperature of from 150° to 175° C and the metallic soap is an iron stearate.
Claim 11
Dependent Claim
33 words
A process according to claim 2 wherein the metallic soap is provided by applying an aqueous solution or dispersion of said metallic soap to said platens or to said composition prior to compression.
Claim 12
Dependent Claim
22 words
A process according to claim 9 wherein dissolved in an aqueous dispersion of an insoluble metallic soap is a soluble metallic soap.
Claim 13
Dependent Claim
33 words
A process according to claim 10 wherein the aqueous dispersion comprises approximately 5 parts of an insoluble metallic soap, 1 part of a soluble metallic soap and up to 150 parts of water.
Claim 14
Dependent Claim
39 words
A process according to claim 10 wherein the insoluble metallic soap is prepared by stirring together a soluble salt of a metal which forms an insoluble metallic soap to a solution of a soluble salt of a metallic soap.
Claim 15
Dependent Claim
34 words
A process according to claim 12 wherein the insoluble metallic soap is ferric oleate prepared by stirring a ferric chloride solution into a solution of a molar excess of a solution of potassium oleate.
Claim 16
Dependent Claim
43 words
A process according to claim 2 wherein in a first compression operation of a series of operations the metallic soap is applied to the press platen and thereafter for successive operations the metallic soap is applied at least in part to the composition.
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) | 1981-08-28 | 1982-02-27 | 1982-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-08-28 | 1986-02-27 | 1986-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-08-28 | 1990-02-27 | 1990-08-29 | $7700.00 | Window Closed / Lapsed |