Patent US3187280A successfully refreshed from Google Patents.
Patent US4409055A successfully refreshed from Google Patents.
US4409055A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adhesion of rubber to aramid cords
Assignee: Aerojet Rocketdyne Holdings Inc
•
Filing: 1983-01-12
•
Granted: 1983-10-11
•
Expires: 2003-01-12
Abstract
Abstract An aramid reinforcing element or cord is dipped in an aqueous adhesive composition of a phenolic-aldehyde resin and a vinyl pyridine latex and dried. The treatment is repeated again and preferably for three times. The repeatedly treated cord is then cured with a rubber compound to give improved H-adhesion values. If desired, a primer treatment with an epoxide may proceed the aqueous adhesive composition treatments.
Inventors
- 👤 Otto C. Elmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:55
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/04; C08J5/06; C08J2321/00; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2964; Y10T428/2967; Y10T428/2969
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
228 words
A method for adhering a poly(p-phenylene terephthalamide) reinforcing element to a rubber compound which comprises (I) treating said element with a composition comprising an aqueous alkaline dispersion of about 10 to 50% by weight of solids consisting essentially of (a) a rubbery vinyl pyridine copolymer and (b) at least one water soluble thermosetting resin prepared from reactants consisting essentially of a compound selected from the group consisting of phenol, resorcinol, the cresols, the xylenols, p-tert butylphenol and p-phenyl phenol and mixtures thereof and of an aldehyde donor selected from the group consisting of formaldehyde, acetaldehyde, furfural, paraformaldehyde and hexamethylenetetramine and mixtures thereof in an amount of from about 3 to 25 parts by weight dry per 100 parts total by weight dry of (a), heating said treated element at a temperature of from about 200° to 600° F. for from about 300 to 5 seconds to remove essentially all of the water from said composition and to provide said element with a heat cured or heat set adhesive, and repeating step (I) at least one more time, to provide said reinforcing element with a dry adhesive in an amount of up to about 20% total by weight (dry) based on the weight of said reinforcing element, and (II) combining said dried and heat cured adhesive containing reinforcing element with an unvulcanized vulcanizable rubber compound and vulcanizing the same.
Claim 2
Independent Claim
228 words
A method for adhering a poly(p-phenylene terephthalamide) reinforcing element to a rubber compound which comprises (I) treating said element with a composition comprising an aqueous alkaline dispersion of about 10 to 50% by weight of solids consisting essentially of (a) a rubbery vinyl pyridine copolymer and (b) at least one water soluble thermosetting resin prepared from reactants consisting essentially of a compound selected from the group consisting of phenol, resorcinol, the cresols, the xylenols, p-tert butylphenol and p-phenyl phenol and mixtures thereof and of an aldehyde donor selected from the group consisting of formaldehyde, acetaldehyde, furfural, paraformaldehyde and hexamethylenetetramine and mixtures thereof in an amount of from about 3 to 25 parts by weight dry per 100 parts total by weight dry of (a), heating said treated element at a temperature of from about 200° to 600° F. for from about 300 to 5 seconds to remove essentially all of the water from said composition and to provide said element with a heat cured or heat set adhesive, and repeating step (I) at least one more time, to provide said reinforcing element with a dry adhesive in an amount of up to about 20% total by weight (dry) based on the weight of said reinforcing element, and (II) combining said dried and heat cured adhesive containing reinforcing element with an unvulcanized vulcanizable rubber compound and vulcanizing the same.
Claim 3
Dependent Claim
33 words
A method according to claim 1 where said reinforcing element is first primed by dipping said element in an aqueous dispersion or solution of an epoxide and drying before carrying out step (I).
Claim 4
Dependent Claim
15 words
A method according to claim 1 where step (I) is repeated at least two times.
Claim 5
Dependent Claim
33 words
A method according to claim 3 where said reinforcing element is first primed by dipping said element in an aqueous dispersion or solution of an epoxide and drying before carrying out step (I).
Claim 6
Dependent Claim
22 words
A method according to claim 1 where in (b) the resin comprises a mixture of a resorcinol-formaldehyde resin and a phenol-formaldehyde resin.
Claim 7
Dependent Claim
15 words
A method according to claim 2 where in (b) the resin comprises a resorcinol-formaldehyde resin.
Claim 8
Dependent Claim
124 words
A method according to claim 1 wherein said rubbery vinyl pyridine copolymer of (a) is a terpolymer of from about 60 to 80% by weight of butadiene-1,3, from about 7 to 32% by weight of styrene, and from about 4 to 22% by weight of 2-vinyl pyridine, wherein said resin of (b) is used in an amount of from about 6 to 20 parts by weight dry per 100 parts total by weight dry of (a), wherein said resin of (b) comprises a mixture of a phenol-formaldehyde resin and a resorcinol-formaldehyde resin, wherein said reinforcing agent contains up to about 15% total by weight of said dry adhesive and wherein the solids content of said dispersion is from about 20 to 25% by weight.
Claim 9
Independent Claim
198 words
A method which comprises (I) treating a poly(p-phenylene terephthalamide) reinforcing element with a composition comprising an aqueous alkaline dispersion of about 10 to 50% by weight of solids consisting essentially of (a) a rubbery vinyl pyridine copolymer and (b) at least one water soluble thermosetting resin prepared from reactants consisting essentially of a compound selected from the group consisting of phenol, resorcinol, the cresols, the xylenols, p-tert butylphenol and p-phenyl phenol and mixtures thereof and of an aldehyde donor selected from the group consisting of formaldehyde, acetaldehyde, furfural, paraformaldehyde and hexamethylenetetramine and mixtures thereof in an amount of from about 3 to 25 parts by weight dry per 100 parts total by weight dry of (a), heating said treated element at a temperature of from about 200° to 600° F. for from about 300 to 5 seconds to remove essentially all of the water from said composition and to provide said element with a heat cured or heat set adhesive, and repeating step (I) at least one more time, to provide said reinforcing agent with a dry adhesive in an amount of up to about 20% total by weight (dry) based on the weight of said reinforcing element.
Claim 10
Independent Claim
198 words
A method which comprises (I) treating a poly(p-phenylene terephthalamide) reinforcing element with a composition comprising an aqueous alkaline dispersion of about 10 to 50% by weight of solids consisting essentially of (a) a rubbery vinyl pyridine copolymer and (b) at least one water soluble thermosetting resin prepared from reactants consisting essentially of a compound selected from the group consisting of phenol, resorcinol, the cresols, the xylenols, p-tert butylphenol and p-phenyl phenol and mixtures thereof and of an aldehyde donor selected from the group consisting of formaldehyde, acetaldehyde, furfural, paraformaldehyde and hexamethylenetetramine and mixtures thereof in an amount of from about 3 to 25 parts by weight dry per 100 parts total by weight dry of (a), heating said treated element at a temperature of from about 200° to 600° F. for from about 300 to 5 seconds to remove essentially all of the water from said composition and to provide said element with a heat cured or heat set adhesive, and repeating step (I) at least one more time, to provide said reinforcing agent with a dry adhesive in an amount of up to about 20% total by weight (dry) based on the weight of said reinforcing element.
Claim 11
Dependent Claim
33 words
A method according to claim 8 where said reinforcing element is first primed by dipping said element in an aqueous dispersion or solution of an epoxide and drying before carrying out step (I).
Claim 12
Dependent Claim
15 words
A method according to claim 8 where step (I) is repeated at least two times.
Claim 13
Dependent Claim
33 words
A method according to claim 10 where said reinforcing element is first primed by dipping said element in an aqueous dispersion or solution of an epoxide and drying before carrying out step (I).
Claim 14
Dependent Claim
22 words
A method according to claim 8 where in (b) the resin comprises a mixture of a resorcinol-formaldehyde resin and a phenol-formaldehyde resin.
Claim 15
Dependent Claim
15 words
A method according to claim 9 where in (b) the resin comprises a resorcinol-formaldehyde resin.
Claim 16
Dependent Claim
124 words
A method according to claim 8 wherein said rubbery vinyl pyridine copolymer of (a) is a terpolymer of from about 60 to 80% by weight of butadiene-1,3, from about 7 to 32% by weight of styrene, and from about 4 to 22% by weight of 2-vinyl pyridine, wherein said resin of (b) is used in an amount of from about 6 to 20 parts by weight dry per 100 parts total by weight dry of (a), wherein said resin of (b) comprises a mixture of a phenol-formaldehyde resin and a resorcinol-formaldehyde resin, wherein said reinforcing element contains up to about 15% total by weight of said dry adhesive and wherein the solids content of said dispersion is from about 20 to 25% by weight.
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) | 1986-10-10 | 1987-04-11 | 1987-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-10 | 1991-04-11 | 1991-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-10 | 1995-04-11 | 1995-10-11 | $7700.00 | Window Closed / Lapsed |