US4105462A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-crystallizing rosin
Assignee: Westvaco Corp
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Filing: 1977-02-10
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Granted: 1978-08-08
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Expires: 1997-02-10
Abstract
Abstract Rosin can be rendered non-crystalline and maintain its characteristic chemical and physical properties by the addition of a hard rosin ester.
Inventors
- 👤 Theologos E. Thanos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:45
CPC Classifications
C; C08; C08L; C08L93/00; C08L93/04
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
71 words
A hard, non-crystallizing rosin composition comprising a distilled tall oil rosin containing less than 5% by weight fatty acids and an amount of hard rosin ester sufficient to prevent crystallization wherein said hard rosin ester is produced by mixing and reacting a composition consisting essentially of rosin and a member of the group consisting of pentaerythritol, trimethylolpropane and glycerol, said hard, non-crystallizing rosin having approximately the properties of the starting rosin.
Claim 2
Dependent Claim
71 words
A hard, non-crystallizing rosin composition comprising a distilled tall oil rosin containing less than 5% by weight fatty acids and an amount of hard rosin ester sufficient to prevent crystallization wherein said hard rosin ester is produced by mixing and reacting a composition consisting essentially of rosin and a member of the group consisting of pentaerythritol, trimethylolpropane and glycerol, said hard, non-crystallizing rosin having approximately the properties of the starting rosin.
Claim 3
Dependent Claim
27 words
The rosin composition of claim 1 wherein said hard rosin ester is added in an amount from about 1% to about 12% by weight of said rosin.
Claim 4
Dependent Claim
27 words
The rosin composition of claim 1 wherein said hard rosin ester is added in an amount from about 5% to about 10% by weight of said rosin.
Claim 5
Independent Claim
79 words
A method of making a hard, non-crystallizing rosin composition comprising mixing molten distilled tall oil rosin containing less than 5% by weight fatty acids with a sufficient amount of hard rosin ester to produce a rosin which upon cooling is non-crystallizing and has approximately the properties of the starting rosin wherein said hard rosin ester is produced by mixing and reacting a composition consisting essentially of rosin and a member of the group consisting of pentaerythritol, trimethylolpropane and glycerol.
Claim 6
Independent Claim
79 words
A method of making a hard, non-crystallizing rosin composition comprising mixing molten distilled tall oil rosin containing less than 5% by weight fatty acids with a sufficient amount of hard rosin ester to produce a rosin which upon cooling is non-crystallizing and has approximately the properties of the starting rosin wherein said hard rosin ester is produced by mixing and reacting a composition consisting essentially of rosin and a member of the group consisting of pentaerythritol, trimethylolpropane and glycerol.
Claim 7
Dependent Claim
27 words
The method according to claim 4 wherein said hard rosin ester is added in an amount from about 1% to about 12% by weight of said rosin.
Claim 8
Dependent Claim
27 words
The method according to claim 4 wherein said hard rosin ester is added in an amount from about 5% to about 10% by weight of said rosin.
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) | 1981-08-07 | 1982-02-06 | 1982-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-08-07 | 1986-02-06 | 1986-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-08-07 | 1990-02-06 | 1990-08-08 | $7700.00 | Window Closed / Lapsed |