US4323625A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composites of grafted olefin polymers and cellulose fibers
Assignee: Flexsys America LP
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Filing: 1980-06-13
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Granted: 1982-04-06
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Expires: 2000-06-13
Abstract
Abstract Composites are disclosed of discontinuous cellulose fibers mixed with a methylol phenolic modified polyolefin and a bonding agent. Treated fibers are also disclosed, which are treated to reduce fiber-to-fiber interaction so as to facilitate mixing into composites.
Inventors
- 👤 Aubert Y. Coran
- 👤 Raman Patel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:38
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/02; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/74; C08G18/76; C08G18/7657; C08G18/7664; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/06; C08L23/10; C08L51/00; C08L51/06; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08L2205/00; C08L2205/08; C08L2205/14; C08L2205/16; C08L2207/00; C08L2207/10; C08L2207/14; C08L2310/00; C08L97/00; C08L97/02; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2904; Y10T428/2907; Y10T428/2913; Y10T428/2933; Y10T428/2938; Y10T428/2964; Y10T428/2965; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31942; Y10T428/31949
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
74 words
A composite consisting essentially of from 2 to 55 weight percent of discontinuous cellulose fibers, the remaining from 98 to 45 weight percent being a matrix comprising from 2 to 99.9 parts by weight of a crystalline polymer from alpha olefin monomer having 2 to 4 carbon atoms, said polymer having methylol phenolic groups grafted thereto, and at least 0.1 part by weight of a bonding agent per 100 parts of matrix by weight.
Claim 2
Dependent Claim
74 words
A composite consisting essentially of from 2 to 55 weight percent of discontinuous cellulose fibers, the remaining from 98 to 45 weight percent being a matrix comprising from 2 to 99.9 parts by weight of a crystalline polymer from alpha olefin monomer having 2 to 4 carbon atoms, said polymer having methylol phenolic groups grafted thereto, and at least 0.1 part by weight of a bonding agent per 100 parts of matrix by weight.
Claim 3
Dependent Claim
18 words
The composite of claim 1, wherein the methylol phenolic modified polymer is a modified crystalline polymer of propylene.
Claim 4
Dependent Claim
17 words
The composite of claim 1, wherein the polymer is a modified crystalline copolymer from ethylene and propylene.
Claim 5
Dependent Claim
39 words
The composite of claim 1, wherein the methylol phenolic modified polymer is the product of the reaction of 100 parts by weight of crystalline polymer from propylene with about 0.1 to 20 parts by weight of a methylolphenolic material.
Claim 6
Dependent Claim
19 words
The composite of claim 4, wherein the matrix comprises from 0.5 to 10 parts by weight of bonding agent.
Claim 7
Dependent Claim
18 words
The composite of claim 1, which is free of acidic materials capable of promoting the hydrolysis of cellulose.
Claim 8
Dependent Claim
11 words
The composite of claim 1, wherein the matrix contains acid-accepting materials.
Claim 9
Dependent Claim
17 words
The composite of claim 1, wherein the fibers have an average aspect ratio of at least five.
Claim 10
Dependent Claim
18 words
The composite of claim 2, wherein the fibers have an average aspect ratio of from 20 to 200.
Claim 11
Dependent Claim
11 words
The composite of claim 9, wherein the fibers are unregenerated cellulose.
Claim 12
Dependent Claim
11 words
The composite of claim 10, wherein the fibers are wood pulp.
Claim 13
Dependent Claim
11 words
The composite of claim 11, wherein the fibers are hardwood pulp.
Claim 14
Dependent Claim
14 words
The composite of claim 1, wherein the fibers are pretreated to reduce fiber-to-fiber interaction.
Claim 15
Dependent Claim
27 words
The composite of claim 2, wherein the bonding agent is selected from the group consisting of diisocyanates, polyisocyanates, polymeric polyisocyanates, blocked isocyanates, phenol-aldehyde resins and amino-aldehyde resins.
Claim 16
Dependent Claim
38 words
The composite of claim 10, wherein the bonding agent is selected from the group consisting of phenol-aldehyde resins, amino-aldehyde resins, diisocyanates, polysiocyanates, polymeric polyisocyanates and blocked isocyanates, wherein the average fiber aspect ratio is from 50 to 200.
Claim 17
Dependent Claim
20 words
The composite of claim 1, wherein the matrix comprises from 2 to 95 parts by weight of unmodified poly(alpha olefin).
Claim 18
Dependent Claim
22 words
The composite of claim 15, wherein the matrix comprises from 1 to 75 parts by weight of fully cured particulate EPDM rubber.
Claim 19
Dependent Claim
24 words
The composite of claim 17, wherein the matrix contains fillers and extender oils, and the average fiber aspect ratio is from 75 to 200.
Claim 20
Dependent Claim
60 words
Treated fibers comprising discontinuous cellulose fibers of aspect ratio greater than five and crystalline polymer from alpha olefin monomer having 2 to 4 carbon atoms, said polymer having methylol phenolic groups grafted thereto, and said polymer being present in an amount sufficient to reduce fiber-to-fiber affinity up to about 85 parts by weight per 100 parts of fibers by weight.
Claim 21
Dependent Claim
60 words
Treated fibers comprising discontinuous cellulose fibers of aspect ratio greater than five and crystalline polymer from alpha olefin monomer having 2 to 4 carbon atoms, said polymer having methylol phenolic groups grafted thereto, and said polymer being present in an amount sufficient to reduce fiber-to-fiber affinity up to about 85 parts by weight per 100 parts of fibers by weight.
Claim 22
Dependent Claim
17 words
Treated fibers of claim 19, wherein the fibers have an average aspect ratio of at least five.
Claim 23
Dependent Claim
18 words
Treated fibers of claim 19, wherein the fibers have an average aspect ratio of from 20 to 200.
Claim 24
Dependent Claim
11 words
Treated fibers of claim 19, wherein the fibers are unregenerated cellulose.
Claim 25
Dependent Claim
11 words
Treated fibers of claim 19, wherein the fibers are wood pulp.
Claim 26
Dependent Claim
11 words
Treated fibers of claim 19, wherein the fibers are hardwood pulp.
Claim 27
Dependent Claim
13 words
Treated fibers of claim 19, wherein the crystalline polymer comprises modified crystalline polypropylene.
Claim 28
Dependent Claim
18 words
Treated fibers of claim 19, which is free of acidic materials capable of promoting the hydrolysis of cellulose.
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) | 1985-04-05 | 1985-10-05 | 1986-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-04-05 | 1989-10-05 | 1990-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-04-05 | 1993-10-05 | 1994-04-06 | $7700.00 | Window Closed / Lapsed |