US5110685A
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US
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Low friction, abrasion resistant polymer coating
Assignee: ExxonMobil Chemical Patents Inc
•
Filing: 1990-05-18
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Granted: 1992-05-05
•
Expires: 2010-05-18
Abstract
Abstract The invention relates to certain low friction abrasion resistant polymer coatings. The polymer coatings consist of thermoplastic materials based on blends of elastomers with high density polyethylene comprising a high molecular weight component. The appropriate balance of crystallinity, durability and flexibility can be achieved by selecting the proper amount of low, medium and high molecular weight high density polyethylene. The coating is particularly useful for weatherstripping material for automobile window channels.
Inventors
- 👤 Virginia R. Cross
- 👤 Cindy B. Shulman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:45
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/06; B; B60; B60J; B60J10/00; B60J10/15; B60J10/17; C09; C09D; C09D123/00; C09D123/02; C09D123/04; C09D123/06; C08L2205/00; C08L2205/02; C08L2205/025; C08L2205/03; C08L2205/035; C08L23/16; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31826; Y10T428/31833; Y10T428/31855; Y10T428/31931
Claims Analysis
Total Claims: 36
Claim 1
Independent Claim
56 words
A low friction, abrasion resistant polymer coating composition comprising: (a) a high density polyethylene component comprising a blend of (i) high molecular weight, high density polyethylene; (ii) low molecular weight, high density polyethylene; and (iii) medium molecular weight, high density polyethylene; and (b) an elastomer component comprising a blend of ethylene/propylene rubber and high density polyethylene.
Claim 2
Dependent Claim
56 words
A low friction, abrasion resistant polymer coating composition comprising: (a) a high density polyethylene component comprising a blend of (i) high molecular weight, high density polyethylene; (ii) low molecular weight, high density polyethylene; and (iii) medium molecular weight, high density polyethylene; and (b) an elastomer component comprising a blend of ethylene/propylene rubber and high density polyethylene.
Claim 3
Dependent Claim
25 words
The polymer coating composition defined in claim 1 wherein said high molecular weight, high density polyethylene has a molecular weight of between 100,000 and 9,000,000.
Claim 4
Dependent Claim
25 words
The polymer coating composition defined in claim 1 wherein said low molecular weight, high density polyethylene has a molecular weight of between 1,000 to 50,000.
Claim 5
Dependent Claim
25 words
The polymer coating composition defined in claim 1 wherein said medium molecular weight, high density polyethylene has a molecular weight of between 50,000 and 100,000.
Claim 6
Dependent Claim
28 words
The polymer coating composition defined in claim 1 wherein the ratio of said high molecular weight high density polyethylene to low molecular weight high density polyethylene is 1:1.
Claim 7
Dependent Claim
51 words
The polymer coating composition defined in claim 1 wherein said high molecular weight, high density polyethylene comprises from about 10 to 80 percent by weight of said high density polyethylene; 20 to 70 percent by weight medium molecular weight, high density polyethylene and the balance low molecular weight, high density polyethylene.
Claim 8
Dependent Claim
33 words
The polymer coating composition defined in claim 1 or 5 wherein said elastomer comprises from about 50 to 99 weight percent ethylene/propylene rubber and 50 to 1 percent by weight high density polyethylene.
Claim 9
Dependent Claim
28 words
The polymer coating composition defined in claim 1 wherein the ratio of said high density polyethylene component to said elastomer component ranges from about 3:1 to about 19:1.
Claim 10
Dependent Claim
14 words
The polymer coating composition defined in claim 1 further comprising an ultraviolet resistant material.
Claim 11
Dependent Claim
30 words
The polymer coating composition defined in claim 9 wherein said ultraviolet resistant material is selected from the group comprising hindered amines and blends of carbon black with low density polyethylene.
Claim 12
Dependent Claim
13 words
The polymer coating composition defined in claim 1 further comprising a stabilizing agent.
Claim 13
Dependent Claim
26 words
The polymer coating composition defined in claim 11 wherein said stabilizer is selected from the group comprising tetrakis methane and bis(2,4-di-tert-butylphenyl) pentaerythritol disphosphite, and mixtures thereof.
Claim 14
Dependent Claim
102 words
A low friction, abrasion resistant polymer coating composition comprising: (a) a high density polyethylene blend comprising: (i) a 10 to 80 percent by weight of high molecular weight high density polyethylene; (ii) 0 to 80 percent by weight of medium molecular weight high density polyethylene; (iii) 10 to 80 percent by weight of low molecular weight high density polyethylene and; (b) an elastomer component comprising a blend of 99 to 50 weight percent ethylene/propylene rubber and 1 to 50 weight percent high density polyethylene; wherein the ratio of said high density polyethylene component to said elastomer component ranges from 3:1 to 19:1.
Claim 15
Dependent Claim
102 words
A low friction, abrasion resistant polymer coating composition comprising: (a) a high density polyethylene blend comprising: (i) a 10 to 80 percent by weight of high molecular weight high density polyethylene; (ii) 0 to 80 percent by weight of medium molecular weight high density polyethylene; (iii) 10 to 80 percent by weight of low molecular weight high density polyethylene and; (b) an elastomer component comprising a blend of 99 to 50 weight percent ethylene/propylene rubber and 1 to 50 weight percent high density polyethylene; wherein the ratio of said high density polyethylene component to said elastomer component ranges from 3:1 to 19:1.
Claim 16
Dependent Claim
24 words
The polymer coating composition defined in claim 13 wherein the molecular weight of said high molecular weight polyethylene ranges from about 100,000 to 4,000,000.
Claim 17
Dependent Claim
27 words
The polymer coating composition defined in claim 13 wherein the molecular weight of said medium molecular weight high density polyethylene ranges from about 50,000 to about 100,000.
Claim 18
Dependent Claim
27 words
The polymer coating composition defined in claim 13 wherein the molecular weight of said low molecular weight high density polyethylene ranges from about 1,000 to about 50,000.
Claim 19
Dependent Claim
30 words
The polymer coating composition defined in claim 13 wherein the ration of said high molecular weight high density polyethylene to said low molecular weight high density polyethylene is about 1:1.
Claim 20
Dependent Claim
13 words
The polymer coating composition defined in claim 13 further comprising ultraviolet resistant material.
Claim 21
Dependent Claim
26 words
The polymer coating composition defined in claim 52 wherein said ultraviolet resistant material is present in an amount ranging from about 1.0 to 10.0 weight percent.
Claim 22
Dependent Claim
32 words
The polymer coating composition defined in claim 17 or 19 wherein said ultraviolet resistant material is selected from the group comprising hindered amines and blends of carbon black and low density polyethylene.
Claim 23
Dependent Claim
13 words
The polymer coating composition defined in claim 13 further comprising a stabilizing agent.
Claim 24
Dependent Claim
23 words
The polymer coating composition defined in claim 21 wherein said stabilizing agent is present in an amount ranging from 200 to 1000 ppm.
Claim 25
Dependent Claim
25 words
The polymer coating composition defined in claim 21 wherein said stabilizing agent is selected from the group comprising tetrakis methane and bis(2,4-di-tert-butyl phenyl) pentaerythritol diphosphite.
Claim 26
Dependent Claim
19 words
The polymer coating composition defined in claim 13 wherein said EPR comprises 67 weight percent of said elastomer component.
Claim 27
Dependent Claim
23 words
The polymer coating composition defined in claim 13 wherein the ratio of said high density polyethylene component to said elastomer component is 3:1.
Claim 28
Dependent Claim
114 words
A coated weather stripping material comprising: (a) a first layer comprising a rubbery polymer and (b) a second layer comprising a polymer coating composition, said polymer coating composition comprising: (i) a high density polyethylene component comprising (A) 20 to 80 weight percent high molecular weight high density polyethylene; (B) 0 to 80 weight percent medium molecular weight high density polyethylene; (C) 20 to 80 weight percent low molecular weight high density polyethylene; and (ii) an elastomer component comprising a blend of 99 to 50 weight percent ethylene/propylene rubber and 1 to 50 weight percent high density polyethylene; the ratio of said high density polyethylene component to said elastomer component ranging from 3:1 to 19:1.
Claim 29
Dependent Claim
114 words
A coated weather stripping material comprising: (a) a first layer comprising a rubbery polymer and (b) a second layer comprising a polymer coating composition, said polymer coating composition comprising: (i) a high density polyethylene component comprising (A) 20 to 80 weight percent high molecular weight high density polyethylene; (B) 0 to 80 weight percent medium molecular weight high density polyethylene; (C) 20 to 80 weight percent low molecular weight high density polyethylene; and (ii) an elastomer component comprising a blend of 99 to 50 weight percent ethylene/propylene rubber and 1 to 50 weight percent high density polyethylene; the ratio of said high density polyethylene component to said elastomer component ranging from 3:1 to 19:1.
Claim 30
Dependent Claim
24 words
The coated weatherstripping defined in claim 26 wherein said elastomer component comprises 67 weight percent ethylene/propylene rubber and 33 weight percent high density polyethylene.
Claim 31
Dependent Claim
30 words
The coated weather stripping material defined in claim 26 wherein the ratio of said high molecular weight high density polyethylene to said low molecular weight high density polyethylene is 1:1.
Claim 32
Dependent Claim
24 words
The coated weatherstripping defined in claim 26 wherein said polymer coating composition further comprises 1.0 to 10.0 weight percent of an ultraviolet resistant material.
Claim 33
Dependent Claim
29 words
The coated weatherstripping defined in claim 29 wherein said ultraviolet resistant material is selected from the group comprising hindered amines and blends of carbon black and low density polyethylene.
Claim 34
Dependent Claim
22 words
The coated weatherstripping defined in claim 26 wherein said polymer coating composition further comprises 200 to 1000 ppm of a stabilizing agent.
Claim 35
Dependent Claim
23 words
The coated weatherstripping defined in claim 31 wherein said stabilizing agent is selected from the group comprising tetrakis methane and bis(2,4-di-tert-butylphenyl) pentaerythritol diphosphite.
Claim 36
Dependent Claim
116 words
The coated weatherstripping of claim 26 wherein said high density polyethylene component comprising 20 weight percent high molecular weight high density polyethylene having a molecular weight of between 100,000 and 4,000,000; 60 weight percent medium molecular weight high density polyethylene having a molecular weight of between 50,000 to 100,000 and 20 weight percent low molecular weight high density polyethylene having a molecular weight of between 1,000 and 50,000 and said elastomer component comprising 67 weight percent ethylene/propylene rubber and 33 weight percent high density polyethylene, the ratio of said high density polyethylene component to said elastomer component being 9:1 and further comprising 5 weight percent of a 1:1 blend of carbon black and low density polyethylene.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-05-05 | 1995-11-04 | 1996-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-05-05 | 1999-11-04 | 2000-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-05-05 | 2003-11-04 | 2004-05-05 | $7700.00 | Window Closed / Lapsed |