US4377674A
Expired / Lapsed
US
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Process for the production of polyhydroxy lignin-cellulose silicate polymer
Assignee: Individual
•
Filing: 1982-08-27
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Granted: 1983-03-22
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Expires: 2002-08-27
Abstract
Abstract An alkali metal broken-down plant silicate polymer is reacted with a Lewis acid and an epoxide compound to produce a polyhydroxy lignin-cellulose polymer which may be reacted with polyisocyanates to produce polyurethane silicate foam and be used for insulation.
Inventors
- 👤 David H. Blount
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:09
CPC Classifications
C; C08; C08H; C08H8/00; C08B; C08B15/00; C08B15/05; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/64; C08G18/6484; C08J; C08J9/00; C08J9/02; C08G2101/00; C08J2301/00; C08J2301/02
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
174 words
The process for the production of polyurethane silicate products by the following steps: (a) mixing and reacting the following components, thereby producing a polyhydroxy lignin-cellulose silicate polymer; (i) a broken-down alkali metal plant silicate polymer produced by heating a mixture of 3 parts by weight of a cellulose-containing plant and 1 to 2 parts by weight of an oxidated silicon compound with 2 to 5 parts by weight of a melted alkali metal hydroxide to between 150° C. and 200° C. while agitating for 5 to 60 minutes; in an amount of 100 parts by weight; (ii) an epoxide compound; in an amount of 1 to 3 parts by weight; (iii) a Lewis acid, in an amount wherein the pH of the mixture of Components (i), (ii) and (iii) is 5 to 6; (b) mixing and reacting 100 parts by weight of the polyhydroxy lignin-cellulose silicate polymer of step (a) and 1 to 600 parts by weight of a compound containing at least 2 isocyanate groups, or polyisothiocyanate, thereby producing a polyurethane silicate product.
Claim 2
Dependent Claim
174 words
The process for the production of polyurethane silicate products by the following steps: (a) mixing and reacting the following components, thereby producing a polyhydroxy lignin-cellulose silicate polymer; (i) a broken-down alkali metal plant silicate polymer produced by heating a mixture of 3 parts by weight of a cellulose-containing plant and 1 to 2 parts by weight of an oxidated silicon compound with 2 to 5 parts by weight of a melted alkali metal hydroxide to between 150° C. and 200° C. while agitating for 5 to 60 minutes; in an amount of 100 parts by weight; (ii) an epoxide compound; in an amount of 1 to 3 parts by weight; (iii) a Lewis acid, in an amount wherein the pH of the mixture of Components (i), (ii) and (iii) is 5 to 6; (b) mixing and reacting 100 parts by weight of the polyhydroxy lignin-cellulose silicate polymer of step (a) and 1 to 600 parts by weight of a compound containing at least 2 isocyanate groups, or polyisothiocyanate, thereby producing a polyurethane silicate product.
Claim 3
Dependent Claim
9 words
The product produced by the process of claim 1.
Claim 4
Dependent Claim
36 words
The process of claim 1, wherein the compound containing at least 2 isocyanate groups is selected from the group consisting of arylene polyisocyanates, alkylene polyisocyanates, phosgenation products of aniline-formaldehyde condensation, isocyanate-terminated polyurethane prepolymers, and mixtures thereof.
Claim 5
Dependent Claim
21 words
The process of claim 1 wherein the compound containing at least 2 isocyanate groups is a phosgenated product of aniline-formaldehyde condensation.
Claim 6
Dependent Claim
26 words
The process of claim 1 wherein 1 to 100 parts by weight of an aldehyde are added to components (i), (ii) or (iii) of claim 1.
Claim 7
Dependent Claim
31 words
The process of claim 5 wherein the aldehyde is selected from the group consisting of formaldehyde, acetaldehyde, propionic aldehyde, furfural, crotonaldehyde, acrolein, butyl aldehyde, paraformaldehyde, pentanals, hexanals, heptanals, and mixtures thereof.
Claim 8
Dependent Claim
9 words
The product produced by the process of claim 5.
Claim 9
Dependent Claim
44 words
The process of claim 1 wherein up to 200% by weight of a water-binding agent, up to 100% by weight of a curing agent and an organic or inorganic filler, percentage based on the reaction mixture, are added in step (b) of claim 1.
Claim 10
Dependent Claim
9 words
The product produced by the process of claim 8.
Claim 11
Dependent Claim
29 words
The process of claim 1 wherein up to 100% by weight of a curing agent, percentage based on the reaction mixture, is added in step (b) of claim 1.
Claim 12
Dependent Claim
19 words
The process of claim 1 wherein an organic or inorganic filler is added in step (b) of claim 1.
Claim 13
Dependent Claim
28 words
The process of claim 1 wherein up to 10% by weight of an initiator, percentage based on the reaction mixture, is added in step (b) of claim 1.
Claim 14
Dependent Claim
25 words
The process of claim 1 wherein the epoxide compound is selected from the group consisting of alkylene oxides, epihalohydrins, styrene oxide, tetrahydrofuran, and mixtures thereof.
Claim 15
Dependent Claim
26 words
The process or claim 1, wherein the Lewis acid is a meral acid selected from the group consisting of hydrochloric acid, sulfuric acid and phosphoric acid.
Claim 16
Dependent Claim
24 words
The process of claim 8 wherein the water-binding agent is selected from the group consisting of hydraulic cement, burnt lime, gypsum and synthetic anhydrites.
Claim 17
Dependent Claim
27 words
The process of claim 10 wherein the curing agent is selected from the group consisting of water, water containing silica sol and an aqueous alkali metal silicate.
Claim 18
Dependent Claim
23 words
The process of claim 12 wherein the initiator is selected from the group consisting of tertiary amines, organotin compounds, silaamines, and mixtures thereof.
Claim 19
Dependent Claim
23 words
The process of claim 1 wherein up to 95 parts by weight of a polyol are added in step (b) of claim 1.
Claim 20
Dependent Claim
72 words
The process of claim 1 wherein 100 parts by weight of the polyhydroxy lignin-cellulose silicate polymer of step (a) of claim 26 are mixed and reacted with 1 to 50 parts by weight of a polycarboxylic acid, and up to 50 parts by weight of a polycarboxylic acid anhydride, thereby producing a polyester resin; this is then added in step (b) of claim 1 in place of the polyhydroxy lignin-cellulose silicate polymer.
Claim 21
Dependent Claim
9 words
The product produced by the process of claim 19.
Claim 22
Dependent Claim
26 words
The process of claim 19 wherein the polycarboxylic acid is selected from the group consisting of aliphatic, cycloaliphatic, aromatic and heterocyclic polycarboxylic acids, and mixtures thereof.
Claim 23
Dependent Claim
42 words
The process of claim 19 wherein the polycarboxylic acid anhydride is selected from the group consisting of phthalic acid anhydride, tetrahydrophthalic acid anhydride, hexahydrophthalic acid anhydride, tetrachlorophthalic acid anhydride, endomethylene tetrahydrophthalic acid anhydride, glutaric acid anhydride, maleic acid anhydride, and mixtures thereof.
Claim 24
Dependent Claim
9 words
The product produced by the process of claim 17.
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) | 1986-03-21 | 1986-09-20 | 1987-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-03-21 | 1990-09-20 | 1991-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-03-21 | 1994-09-20 | 1995-03-22 | $7700.00 | Window Closed / Lapsed |