US3773595A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods of adhering and coating with reactive mixtures of polyesters and polyisocyanates
Assignee: Bayer Pharma AG
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Filing: 1971-06-18
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Granted: 1973-11-20
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Expires: 1991-06-18
Abstract
Abstract Methods of adhering materials, particularly rubbers or chlorinecontaining synthetic resins, with a contact adhesive comprising a reactive mixture of an aromatic polyisocyanate and either a polyester, containing hydroxy groups, prepared from alcohols having two or three hydroxy groups and from poly-omega hydroxy caproic acid and/or epsilon caprolactone, or a prepolymer formed between an excess of such a polyester and an aromatic polyisocyanate. Methods of adhering or coating materials with a mixture of an aromatic polyisocyanate, a prepolymer as described above, and a catalyst for forming urethane bonds.
Inventors
- 👤 C Burba
- 👤 E Griebsch
- 👤 B Krieger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:16
CPC Classifications
B; B32; B32B; B32B25/00; B32B25/04; B32B25/08; C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; B32B27/00; B32B27/06; B32B27/08; B32B7/00; B32B7/04; B32B7/12; C08G18/28; C08G18/40; C08G18/42; C08G18/4266; C08G18/4269; C08G18/4277; C08G18/4283; C09; C09J; C09J175/00; C09J175/04; C09J175/06; Y; Y10; Y10S; Y10S528/00; Y10S528/905; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31569; Y10T428/31573; Y10T428/3158
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
26 words
The method as in claim 1 wherein at least one of said materials is a natural rubber, a synthetic rubber, or some other flexible synthetic resin.
Claim 2
Dependent Claim
17 words
a polyester of poly-epsilon-caprolactone and, as initiator, at least one alcohol having two or three hydroxy groups;
Claim 3
Dependent Claim
18 words
a polyester of poly-epsilon-caprolactone and, as initiator, at least one alcohol having two or three hydroxy groups; or
Claim 4
Dependent Claim
18 words
a polyester of poly-epsilon-caprolactone and, as initiator, at least one alcohol having two or three hydroxy groups; or
Claim 5
Dependent Claim
7 words
a mixture of polyesters (1) and (2).
Claim 6
Dependent Claim
7 words
a mixture of polyesters (1) and (2).
Claim 7
Dependent Claim
7 words
a mixture of polyesters (1) and (2);
Claim 8
Dependent Claim
21 words
A method as in claim 1 wherein at least one of said materials is a plasticized synthetic resin containing chlorine atoms.
Claim 9
Dependent Claim
17 words
A method as in claim 1 wherein at least one of said materials is plasticized polyvinyl chloride.
Claim 10
Dependent Claim
20 words
a prepolymer formed by reacting an excess of a polyester according to (1), (2), or (3), with an aromatic polyisocyanate.
Claim 11
Dependent Claim
20 words
A method as in claim 1 wherein said polyester (A) has an hydroxy number from about 50 to about 160.
Claim 12
Independent Claim
115 words
A method for adhering two materials which comprises contacting said materials after coating at least one of said materials with a reactive mixture comprising (I) a prepolymer containing hydroxy groups and having an hydroxy number of at least about 25 - 30, (II) an excess of up to about 50 percent, based on said hydroxy number, of an aromatic triisocyanate or of a mixture thereof with an aromatic diisocyanate, and (III) a catalytic amount of a catalyst for urethane-formation, said prepolymer (I) being the reaction product of an excess of (A) a polyester containing hydroxy groups and having an hydroxy number from about 35 to 190, with (B) an aromatic polyisocyanate, said polyester (A) being:
Claim 13
Independent Claim
109 words
A method for coating a material which comprises applying to said material a reactive mixture comprising (I) a prepolymer containing hydroxy groups and having an hydroxy number of at least about 25 - 30, (II) an excess of up to about 50 percent by weight, based on said hydroxy number, of an aromatic triisocyanate or of a mixture thereof with an organic diisocyanate, and (III) a catalytic amount of a catalyst for urethane-formation, said prepolymer (I) being the reaction product of an excess of (A) a polyester containing hydroxy groups and having an hydroxy number from about 35 to 190, with (B) an aromatic polyisocyanate, said polyester (A) being:
Claim 14
Dependent Claim
11 words
A method as in claim 7 wherein said material is flexible.
Claim 15
Dependent Claim
12 words
A method as in claim 8 wherein said material is a textile.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-19 | 1977-05-21 | 1977-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-19 | 1981-05-21 | 1981-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-19 | 1985-05-21 | 1985-11-20 | $7700.00 | Window Closed / Lapsed |