US3882065A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot melt adhesives of improved melt viscosity stability
Assignee: EIDP Inc
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Filing: 1973-06-27
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Granted: 1975-05-06
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Expires: 1993-06-27
Abstract
Abstract The viscosity stability of hot melt adhesives containing an elastomeric linear EPDM, branched ethylene/propylene copolymer, or propylene/hexene-1 dipolymer is markedly improved by inclusion in the adhesive composition of boric acid, boric anhydride, or a boric acid ester, in combination with a phenolic antioxidant.
Inventors
- 👤 Jr Austin Matthew Snow
- 👤 Ronald Earl Uschold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:59
CPC Classifications
C; C09; C09J; C09J191/00; C09J191/06; C09J191/08; C08; C08K; C08K3/00; C08K3/38; C08K5/00; C08K5/55; C09J123/00; C09J123/02; C09J123/16; C09J157/00; C09J157/02; C08L; C08L2666/00; C08L2666/02; C08L2666/28; C08L2666/54
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
102 words
A HOT MELT ADHESIVE COMPOSITION COMPRISING, IN PARTS BY WEIGHT, ABOUT: 1. 100 PARTS OF PETROLEUM WAX; 2. 40 TO 200 PARTS OF A TACKIFYING RESIN; 3. 15 TO 100 PARTS OF AT LEAST ONE OF A. AN ELASTOMERIC LINEAR EPDM COPOLYMER, B. AN ELASTOMERIC BRANCHED COPOLYMER OF ETHYLENE, AT LEAST ONE C3 TO C18 ALPHA-OLEFIN, AND AT LEAST ONE DIREACTIVE NONCONJUGATED DIENE, AND C. AN ELASTOMERIC BRANCED COPOLYMER OF ETHYLENE, AT LEAST ONE C3 TO C18 ALPHA-OLEFIN, AT LEAST ONE DIREACTIVE NONCONJUGATED DIENE, AND AT LEAST ONE MONOREACTIVE NONCONJUGATED DIENE, SAID COPOLYMER HAVING A MOONEY VISCOSITY OF ABOUT 10 TO 70;
Claim 2
Dependent Claim
102 words
A HOT MELT ADHESIVE COMPOSITION COMPRISING, IN PARTS BY WEIGHT, ABOUT: 1. 100 PARTS OF PETROLEUM WAX; 2. 40 TO 200 PARTS OF A TACKIFYING RESIN; 3. 15 TO 100 PARTS OF AT LEAST ONE OF A. AN ELASTOMERIC LINEAR EPDM COPOLYMER, B. AN ELASTOMERIC BRANCHED COPOLYMER OF ETHYLENE, AT LEAST ONE C3 TO C18 ALPHA-OLEFIN, AND AT LEAST ONE DIREACTIVE NONCONJUGATED DIENE, AND C. AN ELASTOMERIC BRANCED COPOLYMER OF ETHYLENE, AT LEAST ONE C3 TO C18 ALPHA-OLEFIN, AT LEAST ONE DIREACTIVE NONCONJUGATED DIENE, AND AT LEAST ONE MONOREACTIVE NONCONJUGATED DIENE, SAID COPOLYMER HAVING A MOONEY VISCOSITY OF ABOUT 10 TO 70;
Claim 3
Dependent Claim
34 words
The composition of claim 1 containing an effective amount of boric additive and phenolic antioxidant to stabilize the composition against viscosity changes, after 96 hours in the molten state, in excess of about 20%.
Claim 4
Dependent Claim
8 words
40 to 200 parts of a tackifying resin;
Claim 5
Dependent Claim
8 words
40 to 200 parts of a tackifying resin;
Claim 6
Dependent Claim
75 words
15 to 100 parts of at least one of a. an elastomeric linear EPDM copolymer, b. an elastomeric branched copolymer of ethylene, at least one C3 to C18 alpha-olefin, and at least one direactive nonconjugated diene, and c. an elastomeric branched copolymer of ethylene, at least one C3 to C18 alpha-olefin, at least one direactive nonconjugated diene, and at least one monoreactive nonconjugated diene, said copolymer having a Mooney viscosity of about 10 to 70;
Claim 7
Dependent Claim
75 words
15 to 100 parts of at least one of a. an elastomeric linear EPDM copolymer, b. an elastomeric branched copolymer of ethylene, at least one C3 to C18 alpha-olefin, and at least one direactive nonconjugated diene, and c. an elastomeric branched copolymer of ethylene, at least one C3 to C18 alpha-olefin, at least one direactive nonconjugated diene, and at least one monoreactive nonconjugated diene, said copolymer having a Mooney viscosity of about 10 to 70;
Claim 8
Dependent Claim
44 words
The composition of claim 2 wherein the branched copolymer contains about 40 to 80% by weight ethylene, about 0.01 to 0.5 mole direactive diene per kilogram of copolymer, and about 0 to 2 moles monoreactive diene per kilogram of copolymer, the balance being propylene.
Claim 9
Dependent Claim
15 words
AT LEAST 2.2 PARTS OF A BORIC ADDITIVE PER 100 PARTS OF ELASTOMERIC COPOLYMER; AND
Claim 10
Dependent Claim
15 words
AT LEAST 2.2 PARTS OF A BORIC ADDITIVE PER 100 PARTS OF ELASTOMERIC COPOLYMER; AND
Claim 11
Dependent Claim
15 words
at least 2.2 parts of a boric additive per 100 parts of elastomeric copolymer; and
Claim 12
Dependent Claim
15 words
at least 2.2 parts of a boric additive per 100 parts of elastomeric copolymer; and
Claim 13
Dependent Claim
12 words
The composition of claim 3 wherein the direactive diene is 2, 5-norbornadiene.
Claim 14
Dependent Claim
26 words
at least 2.2 parts of phenolic antioxidant per 100 parts of elastomeric copolymer; said boric additive being at least one of boric acid, and boric anhydride.
Claim 15
Dependent Claim
26 words
at least 2.2 parts of phenolic antioxidant per 100 parts of elastomeric copolymer; said boric additive being at least one of boric acid, and boric anhydride.
Claim 16
Dependent Claim
26 words
AT LEAST 2.2 PARTS OF PHENOLIC ANTIOXIDANT PER 100 PARTS OF ELASTOMERIC COPOLYMER; SAID BORIC ADDITIVE BEING AT LEAST ONE OF BORIC ACID, AND BORIIC ANHYDRIDE.
Claim 17
Dependent Claim
26 words
AT LEAST 2.2 PARTS OF PHENOLIC ANTIOXIDANT PER 100 PARTS OF ELASTOMERIC COPOLYMER; SAID BORIC ADDITIVE BEING AT LEAST ONE OF BORIC ACID, AND BORIIC ANHYDRIDE.
Claim 18
Dependent Claim
12 words
The composition of claim 3 wherein the direactive diene is 1, 7-octadiene.
Claim 19
Dependent Claim
17 words
The composition of claim 2 wherein the EPDM copolymer is a copolymer of ethylene, propylene, and 1,4-hexadiene.
Claim 20
Dependent Claim
56 words
The composition of claim 1 having a viscosity of about 100 to 10,000 centipoises wherein the elastomeric component is a branched copolymer containing 40 to 80% by weight ethylene, about 0.1 to 0.5 mole direactive diene per kilogram of copolymer, and about 0 to 2 moles monoreactive diene per kilogram of copolymer, the balance being propylene.
Claim 21
Dependent Claim
34 words
The composition of claim 7 containing an effective amount of boric additive and phenolic antioxidant to stabilize the composition against viscosity changes, after 96 hours in the molten state, in excess of about 20%.
Claim 22
Dependent Claim
16 words
The composition of claim 7 wherein the phenolic antioxidant is a hindered phenolic antioxidant or hydroquinone.
Claim 23
Dependent Claim
11 words
The composition of claim 9 wherein the direactive diene is 2,5-norbornadiene.
Claim 24
Dependent Claim
11 words
The composition of claim 9 wherein the direactive diene is 1,7-octadiene.
Claim 25
Dependent Claim
88 words
The composition of claim 1 wherein the elastomeric component is a branched copolymer containing 40 to 80% by weight ethylene, about 0.1 to 0.3 mole direactive diene per kilogram of copolymer, and about 0 to 2 moles monoreactive diene per kilogram of copolymer, the balance being propylene; said copolymer having a Mooney viscosity of about 18 to 30; and the amount of boric additive and phenolic antioxidant being effective to stabilize the composition against viscosity changes, after 96 hours in the molten state, in excess of about 20%.
Claim 26
Dependent Claim
20 words
The compoSition of claim 12 wherein the phenolic antioxidant is at least one of hydroquinone and a hindered phenolic antioxidant.
Claim 27
Dependent Claim
11 words
The composition of claim 13 wherein the direactive diene is 2,5-norbornadiene.
Claim 28
Dependent Claim
11 words
The composition of claim 13 wherein the direactive diene is 1,7-octadiene.
Claim 29
Dependent Claim
32 words
The composition of claim 13 wherein the amount of boric additive is effective to stabilize the composition against viscosity changes, after 96 hours in the molten state, in excess of about 5%.
Claim 30
Dependent Claim
38 words
The composition of claim 16 wherein the elastomeric branched copolymer contains about 70 to 74% by weight ethylene, about 0.1 to 0.3 mole 2,5-norbornadiene per kilogram of copolymer, up to 6% by weight 1,4-hexadiene, the balance being propylene.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |