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US3716396A
Expired / Lapsed
US
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Process for producing polyesters of improved rubber adhesion and product
Assignee: Individual
•
Filing: 1971-04-15
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Granted: 1973-02-13
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Expires: 1991-04-15
Abstract
Abstract Rubber adhesion properties of fibrous polyester materials are improved by a process which comprises applying a solution of an amine compound, such as polyethylene imine, to said fibrous material, subjecting the resulting fibrous material to heat treatment and then treating said fibrous material with an organic solvent solution of a polycarboxylic acid halide such as adipic acid dichloride.
Inventors
- 👤 K Shirano
- 👤 T Yoshitake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:25
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/04; C08J5/06; C08J2321/00; Y; Y10; Y10S; Y10S156/00; Y10S156/91; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31786; Y10T442/00; Y10T442/20; Y10T442/2041; Y10T442/2098; Y10T442/2738
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
91 words
Process for the treatment of polyesters impart enhanced rubber adhesion thereto which comprises applying to a polyester, a solution of an amine compound having at least two primary or secondary amino groups, subjecting the resulting polyester to heat treatment at a temperature above 50*C. and below the melting point of the polyester, then treating the heat treated polyester with a solution of an aliphatic or aromatic polycarboxylic acid halide having at least two acid halide groups in an organic solvent, and evaporating the solvent, whereby enhanced rubber adhesion is imparted thereto.
Claim 2
Dependent Claim
91 words
Process for the treatment of polyesters impart enhanced rubber adhesion thereto which comprises applying to a polyester, a solution of an amine compound having at least two primary or secondary amino groups, subjecting the resulting polyester to heat treatment at a temperature above 50*C. and below the melting point of the polyester, then treating the heat treated polyester with a solution of an aliphatic or aromatic polycarboxylic acid halide having at least two acid halide groups in an organic solvent, and evaporating the solvent, whereby enhanced rubber adhesion is imparted thereto.
Claim 3
Dependent Claim
13 words
Process as defined in claim 1 wherein the polyester is an aromatic polyester.
Claim 4
Dependent Claim
23 words
Process as defined in claim 1 wherein the amine compound is a polyethylene imine having a molecular weight of less than 100, 000.
Claim 5
Dependent Claim
17 words
Process as defined in claim 1 wherein the solution of the amine compound is an aqueous solution.
Claim 6
Dependent Claim
18 words
Process as defined in claim 1 wherein the solution of the amine compound is a lower alcoholic solution.
Claim 7
Dependent Claim
22 words
Process as defined in claim 1 wherein the concentration of the amine in the solution ranges from 0.01 to 50 weight percent.
Claim 8
Dependent Claim
26 words
Process as defined in claim 1 wherein the solution of amine compound is applied to the polyester at temperatures ranging from room temperature to 100* C.
Claim 9
Dependent Claim
25 words
Process as defined in claim 1 wherein from 0.01 to 3 weight percent of the amine compound is picked up by the polyester during treatment.
Claim 10
Dependent Claim
19 words
Process as defined in claim 1 wherein the solution of amine compound additionally contains an alkaline hydrogen halide acceptor.
Claim 11
Dependent Claim
19 words
Process as defined in claim 1 wherein the heat treatment is conducted at temperatures of from 80* to 200*C.
Claim 12
Dependent Claim
48 words
Process as defined in claim 1 wherein the amine compound is a polyethylene imine, and the aliphatic or aromatic polycarboxylic acid having at least two acid halide groups is a saturated aliphatic dicarboxylic acid halide containing from two to 15 carbon atoms or a benzene dicarboxylic acid dihalide.
Claim 13
Dependent Claim
28 words
Process as defined in claim 1 wherein the concentration of the aliphatic or aromatic polycarboxylic acid halide in the treating solution ranges from 0.1 to 30 weight percent.
Claim 14
Dependent Claim
27 words
Process as defined in claim 1 wherein the aliphatic or aromatic polycarboxylic acid halide solution is applied to the polyester at temperatures ranging from 0* to 100*C.
Claim 15
Dependent Claim
31 words
Process as defined in claim 1 wherein the aliphatic or aromatic polycarboxylic acid halide solution is applied to the polyester for a period of time ranging from 0.1 to 60 seconds.
Claim 16
Dependent Claim
24 words
Process as defined in claim 1 wherein the resulting polyester is washed with an aqueous alkaline solution to remove hydrogen halides produced during treatment.
Claim 17
Dependent Claim
36 words
Process as defined in claim 1 wherein an aqueous dispersion of a mixture of a partially condensed resorcinol-formaldehyde resin in a vinyl pyridine copolymer latex is applied to the treated polyester to effect adhesion to rubber.
Claim 18
Dependent Claim
16 words
A fibrous polyester material exhibiting enhanced adhesion to rubber prepared by the process of claim 16.
Claim 19
Dependent Claim
14 words
A polyester exhibiting enhanced adhesion to rubber prepared by the process of claim 1.
Claim 20
Dependent Claim
81 words
Process for treating fibrous polyester materials comprising applying to a fibrous polyethylene terephthalate material, an aqueous or alcoholic solution Of a polyethylene imine in a concentration of from 0.1 to 10 weight percent, heating the resulting material at a temperature of from 80* to 200*C., then applying to the heat treated material a solution comprising 0.5 to 10 weight percent of a saturated aliphatic dicarboxylic acid dihalide containing from two to 15 carbon atoms in organic solvent, and evaporating the solvent.
Claim 21
Dependent Claim
81 words
Process for treating fibrous polyester materials comprising applying to a fibrous polyethylene terephthalate material, an aqueous or alcoholic solution Of a polyethylene imine in a concentration of from 0.1 to 10 weight percent, heating the resulting material at a temperature of from 80* to 200*C., then applying to the heat treated material a solution comprising 0.5 to 10 weight percent of a saturated aliphatic dicarboxylic acid dihalide containing from two to 15 carbon atoms in organic solvent, and evaporating the solvent.
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) | 1976-02-13 | 1976-08-14 | 1977-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-13 | 1980-08-14 | 1981-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-13 | 1984-08-14 | 1985-02-13 | $7700.00 | Window Closed / Lapsed |