US4363891A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glyceryl monostearate plastic lubricants
Assignee: Glyco Inc
•
Filing: 1981-05-14
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Granted: 1982-12-14
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Expires: 2001-05-14
Abstract
Abstract Substantial improvement in the heat stability of rigid plastic products, such as polyvinyl chloride, is obtained by incorporating therein glyceryl monostearate having less than 4% contained glycerine.
Inventors
- 👤 Marvin Rosen
- 👤 Larry K. Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:04
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/10; C08K5/101; C08K5/103
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
45 words
A method for improving early color and long-term heat stability under dynamic processing conditions of a rigid plastic material selected from the group consisting of polyvinylchloride, acrylonitrile-butadiene-styrene copolymer and polypropylene which comprises adding to said material a glyceryl monostearate lubricant containing less than 4% glycerine.
Claim 2
Independent Claim
45 words
A method for improving early color and long-term heat stability under dynamic processing conditions of a rigid plastic material selected from the group consisting of polyvinylchloride, acrylonitrile-butadiene-styrene copolymer and polypropylene which comprises adding to said material a glyceryl monostearate lubricant containing less than 4% glycerine.
Claim 3
Dependent Claim
14 words
A method according to claim 1 wherein said plastic material is a rigid polyvinylchloride.
Claim 4
Dependent Claim
32 words
A method according to claim 1 or 2 wherein the amount of glyceryl monostearate ranges from about 0.1 parts to about 5 parts by weight per hundred parts of said plastic material.
Claim 5
Dependent Claim
20 words
A method according to claim 3 wherein the amount of glyceryl monostearate ranges from about 0.5 to about 2 parts.
Claim 6
Dependent Claim
44 words
A rigid plastic material having improved early color and enhanced long-term heat stability under dynamic processing conditions comprising a rigid plastic material selected from the group consisting of polyvinylchloride, acrylonitrile-butadiene-styrene copolymer and polypropylene in combination a glyceryl monostearate lubricant containing less than 4% glycerine.
Claim 7
Dependent Claim
44 words
A rigid plastic material having improved early color and enhanced long-term heat stability under dynamic processing conditions comprising a rigid plastic material selected from the group consisting of polyvinylchloride, acrylonitrile-butadiene-styrene copolymer and polypropylene in combination a glyceryl monostearate lubricant containing less than 4% glycerine.
Claim 8
Dependent Claim
13 words
A material according to claim 5 wherein said rigid plastic material is polyvinylchloride.
Claim 9
Dependent Claim
32 words
A material according to claim 5 or 6 wherein the amount of glyceryl monostearate ranges from about 0.1 parts to about 5 parts by weight per hundred parts of said plastic material.
Claim 10
Dependent Claim
20 words
A material according to claim 7 wherein the amount of glyceryl monostearate ranges from about 0.5 to about 2 parts.
Claim 11
Dependent Claim
16 words
A method according to claim 1 wherein the glyceryl monostearate lubricant contains less than 1% glycerine.
Claim 12
Dependent Claim
16 words
A material according to claim 5 wherein the glyceryl monostearate lubricant contains less than 1% glycerine.
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) | 1985-12-13 | 1986-06-14 | 1986-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-13 | 1990-06-14 | 1990-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-13 | 1994-06-14 | 1994-12-14 | $7700.00 | Window Closed / Lapsed |