US4594388A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing shaped articles with excellent heat resistance and adhesiveness to rubber from a composition comprising polyester and epoxidized polybutadiene and adhering said articles to rubber
Assignee: Unitika Ltd
•
Filing: 1984-08-30
•
Granted: 1986-06-10
•
Expires: 2004-08-30
Abstract
Abstract This invention is a method of manufacturing polyesters with excellent heat resistance and adhesiveness to rubber, characterized in that 0.2-5 weight percent epoxidized polybutadiene is reacted with a polyester composed of aromatic dicarboxylic acid and a glycol ingredient with a carbon number of 2-6, and the terminal carboxyl group quantity is made 15 grams equivalent per 10 6 grams polymer or less.
Inventors
- 👤 Yoshihiro Arai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:17
CPC Classifications
C; C08; C08G; C08G81/00; C08G81/02; C08G81/024; C08G81/027
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
160 words
In the method of manufacturing shaped articles of polyester and adhering said articles to rubber said articles having excellent heat resistance and adhesion to rubber, the improvement comprising reacting from about 0.2 to about 5 percent by weight of an epoxidized polybutadiene which may be any of those epoxidized polybutadienes expressed by the formulas (1) and (2) below: ##STR3## wherein BD in the formula means a butadiene unit which may have substituents, the microstructure of which contains one or more trans 1,4, cis 1,4 and vinyl 1,2 bonds, L is a number from 1 to 100, and m and n are numbers such that (m+n) is 1 to 50; with a polyester composed of an aromatic dicarboxylic acid and glycol ingredient with 2 to 6 carbons so that the resultant polyester has less than 15 gram equivalents of terminal carboxyl groups per 10 6 grams of polymer, such shaped articles being selected from the group consisting of film and fiber.
Claim 2
Dependent Claim
160 words
In the method of manufacturing shaped articles of polyester and adhering said articles to rubber said articles having excellent heat resistance and adhesion to rubber, the improvement comprising reacting from about 0.2 to about 5 percent by weight of an epoxidized polybutadiene which may be any of those epoxidized polybutadienes expressed by the formulas (1) and (2) below: ##STR3## wherein BD in the formula means a butadiene unit which may have substituents, the microstructure of which contains one or more trans 1,4, cis 1,4 and vinyl 1,2 bonds, L is a number from 1 to 100, and m and n are numbers such that (m+n) is 1 to 50; with a polyester composed of an aromatic dicarboxylic acid and glycol ingredient with 2 to 6 carbons so that the resultant polyester has less than 15 gram equivalents of terminal carboxyl groups per 10 6 grams of polymer, such shaped articles being selected from the group consisting of film and fiber.
Claim 3
Dependent Claim
12 words
The method of claim 1 wherein the shaped article is a fiber.
Claim 4
Dependent Claim
11 words
The method of claim 1 wherein the shaped article is film.
Claim 5
Dependent Claim
24 words
The method of claim 1 wherein the epoxidized polybutadiene is reacted with molten polyester after the polymer has reached an intrinsic viscosity of 0.5.
Claim 6
Dependent Claim
13 words
The method of claim 4 wherein the reaction requires three minutes or more.
Claim 7
Dependent Claim
33 words
The method of claim 1 wherein the epoxidized polybutadiene is reacted by mixing with polymer in solid, granular form prior to molten extrusion into a shaped article, whereby the reaction occurs during extrusion.
Claim 8
Dependent Claim
11 words
The method of claim 1 wherein a catalyst is also added.
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) | 1989-06-09 | 1989-12-09 | 1990-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-09 | 1993-12-09 | 1994-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-09 | 1997-12-09 | 1998-06-10 | $7700.00 | Window Closed / Lapsed |