US3945877A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cross linkable thermoplastic adhesives
Assignee: Braskem America Inc
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Filing: 1974-10-25
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Granted: 1976-03-23
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Expires: 1994-10-25
Abstract
Abstract Compositions are disclosed for making thermoplastic adhesives and coatings. The compositions include coal tar pitch and two copolymers of ethylene in which the copolymers are cross-linked with dicumyl peroxide.
Inventors
- 👤 Arthur J. Marcozzi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:45
CPC Classifications
C; C09; C09J; C09J195/00; C08; C08K; C08K5/00; C08K5/04; C08K5/14; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/08; C08L95/00; C09J123/00; C09J123/02; C09J123/04; C09J123/08; C08L2666/00; C08L2666/02; C08L2666/28; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31815
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
93 words
Method of adhering surfaces comprising A. forming an adhesive composition comprising, by weight a. about 25 to 50 percent pitch; b. about 20 to 40 percent ethylene vinyl acetate copolymer; c. about 20 to 40 percent ethylene - acrylic acid copolymer; and d. about 0.5 to 10 percent dicumyl peroxide into a shape applicable to the surfaces to be joined, at a temperature above the melting temperature of the ethylene polymers; B. applying the shaped composition to the surfaces to be joined; and C. heating the composition to the surfaces to be joined.
Claim 2
Dependent Claim
93 words
Method of adhering surfaces comprising A. forming an adhesive composition comprising, by weight a. about 25 to 50 percent pitch; b. about 20 to 40 percent ethylene vinyl acetate copolymer; c. about 20 to 40 percent ethylene - acrylic acid copolymer; and d. about 0.5 to 10 percent dicumyl peroxide into a shape applicable to the surfaces to be joined, at a temperature above the melting temperature of the ethylene polymers; B. applying the shaped composition to the surfaces to be joined; and C. heating the composition to the surfaces to be joined.
Claim 3
Dependent Claim
143 words
Method of joined surfaces comprising A. forming a composition comprising a. about 25 to 50 percent pitch having a ring-and-ball softening point between about 70°C and 200°C; b. about 20 to 40 percent copolymer of ethylene and vinyl acetate in which the ethylene comprises from 50 to 95 percent by weight; c. about 20 to 40 percent copolymers of ethylene and acrylic acid in which the ethylene comprises from 25 percent to about 99.9 percent by weight, having a melt index from about 0.1 to about 400; and d. about 0.5 to 10 percent dicumyl peroxide; into a shape applicable to the surfaces to be joined, at a temperature above the melting temperature of the ethylene polymers; B. applying the shaped composition to the surfaces to be joined; and C. heating the composition to a temperature above the decomposition temperature of dicumyl peroxide.
Claim 4
Dependent Claim
143 words
Method of joined surfaces comprising A. forming a composition comprising a. about 25 to 50 percent pitch having a ring-and-ball softening point between about 70°C and 200°C; b. about 20 to 40 percent copolymer of ethylene and vinyl acetate in which the ethylene comprises from 50 to 95 percent by weight; c. about 20 to 40 percent copolymers of ethylene and acrylic acid in which the ethylene comprises from 25 percent to about 99.9 percent by weight, having a melt index from about 0.1 to about 400; and d. about 0.5 to 10 percent dicumyl peroxide; into a shape applicable to the surfaces to be joined, at a temperature above the melting temperature of the ethylene polymers; B. applying the shaped composition to the surfaces to be joined; and C. heating the composition to a temperature above the decomposition temperature of dicumyl peroxide.
Claim 5
Dependent Claim
96 words
Method of adhering surfaces comprising A. forming a composition comprising, by weight a. about 25 to 50 percent pitch; b. about 20 to 40 percent ethylene vinyl acetate copolymer; c. about 20 to 40 percent ethylene - acrylic acid copolymer; and d. about 0.5 to 10 percent dicumyl peroxide; into a shape applicable to the surface to be joined, at a temperature above the melting temperature of the ethylene polymers; B. applying the shaped composition to the surfaces to be joined; and C. heating the composition to a temperature above the decomposition temperature of dicumyl peroxide.
Claim 6
Dependent Claim
96 words
Method of adhering surfaces comprising A. forming a composition comprising, by weight a. about 25 to 50 percent pitch; b. about 20 to 40 percent ethylene vinyl acetate copolymer; c. about 20 to 40 percent ethylene - acrylic acid copolymer; and d. about 0.5 to 10 percent dicumyl peroxide; into a shape applicable to the surface to be joined, at a temperature above the melting temperature of the ethylene polymers; B. applying the shaped composition to the surfaces to be joined; and C. heating the composition to a temperature above the decomposition temperature of dicumyl peroxide.
Claim 7
Dependent Claim
143 words
Method of joining surfaces comprising A. forming a composition comprising a. about 25 to 50 percent pitch having a ring-and-ball softening point between about 100°C and 150°C; b. about 20 to 40 percent copolymer of ethylene and vinyl acetate in which the ethylene comprises from 59 to 95 percent by weight; c. about 20 to 40 percent copolymers of ethylene and acrylic acid in which the ethylene comprises from 25 percent to about 99.9 percent by weight, having a melt index from about 0.1 to about 400; and d. about 0.5 to 10 percent dicumyl peroxide; into a shape applicable to the surfaces to be joined, at a temperature above the melting temperature of the ethylene polymers; B. applying the shaped composition to the surfaces to be joined; and C. heating the composition to a temperature above the decomposition temperature of dicumyl peroxide.
Claim 8
Dependent Claim
143 words
Method of joining surfaces comprising A. forming a composition comprising a. about 25 to 50 percent pitch having a ring-and-ball softening point between about 100°C and 150°C; b. about 20 to 40 percent copolymer of ethylene and vinyl acetate in which the ethylene comprises from 59 to 95 percent by weight; c. about 20 to 40 percent copolymers of ethylene and acrylic acid in which the ethylene comprises from 25 percent to about 99.9 percent by weight, having a melt index from about 0.1 to about 400; and d. about 0.5 to 10 percent dicumyl peroxide; into a shape applicable to the surfaces to be joined, at a temperature above the melting temperature of the ethylene polymers; B. applying the shaped composition to the surfaces to be joined; and C. heating the composition to a temperature above the decomposition temperature of dicumyl peroxide.
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) | 1979-03-23 | 1979-09-22 | 1980-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-23 | 1983-09-22 | 1984-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-23 | 1987-09-22 | 1988-03-23 | $7700.00 | Window Closed / Lapsed |