US3980735A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot melt adhesive composition
Assignee: Tosoh Corp
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Filing: 1975-03-24
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Granted: 1976-09-14
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Expires: 1995-03-24
Abstract
Abstract A hot melt adhesive composition, which comprises: a modified ethylene-vinyl acetate copolymer produced by heating a mixture of 99.7 - 20 parts by wt. of an ethylene-vinyl acetate copolymer having a vinyl content of 5 - 50 wt. % and a melt index of 1 - 400 g/10 min., 0.3 - 80 parts by wt. of an unsaturated alkyd resin produced by esterification of an unsaturated acid and a polyhydric alcohol and 0.05 - 5 parts by wt. of an organic peroxide.
Inventors
- 👤 Yujiro Kosaka
- 👤 Noriaki Emura
- 👤 Syuzo Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:03
CPC Classifications
C; C09; C09J; C09J123/00; C09J123/02; C09J123/04; C09J123/08; B; B32; B32B; B32B27/00; B32B27/04; C08; C08K; C08K5/00; C08K5/04; C08K5/14; C09J167/00; C09J167/06; C09J7/00; C09J7/10; C08L; C08L2666/00; C08L2666/02; C08L2666/04; C08L2666/14; C08L2666/28; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31681; Y10T428/31692
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
116 words
A hot melt adhesive composition, which comprise of: a modified ethylene-vinylacetate copolymer produced by heating a mixture of 99.7 - 20 parts by weight of an ethylene -- vinyl acetate copolymer having a vinyl acetate content of 5-50 wt. % and a melt index of 1-400 g/10 min.; 0.3-80 parts by weight of an unsaturated alkyd resin having a number average molecular weight of 500-5000 produced by esterification of a polyhydric alcohol and an unsaturated dicarboxylic acid or anhydride or a mixture of unsaturated dicarboxylic acid or anhydride with a saturated dicarboxylic acid or anhydride; 0.05-5 parts by weight of an organic peroxide wherein the mixture is heated above the decomposition temperature of the organic peroxide.
Claim 2
Dependent Claim
116 words
A hot melt adhesive composition, which comprise of: a modified ethylene-vinylacetate copolymer produced by heating a mixture of 99.7 - 20 parts by weight of an ethylene -- vinyl acetate copolymer having a vinyl acetate content of 5-50 wt. % and a melt index of 1-400 g/10 min.; 0.3-80 parts by weight of an unsaturated alkyd resin having a number average molecular weight of 500-5000 produced by esterification of a polyhydric alcohol and an unsaturated dicarboxylic acid or anhydride or a mixture of unsaturated dicarboxylic acid or anhydride with a saturated dicarboxylic acid or anhydride; 0.05-5 parts by weight of an organic peroxide wherein the mixture is heated above the decomposition temperature of the organic peroxide.
Claim 3
Dependent Claim
73 words
The hot melt adhesive of claim 1 wherein the polyhydric alcohol is selected from the group consisting of ethyleneglycol, diethyleneglycol, propyleneglycol, dipropyleneglycol, butyleneglycol and hydrogenated bisphenol, the unsaturated dicarboxylic acid or anhydride is selected from the group consisting of maleic anhydride, fumaric acid and itaconic acid and the saturated dicarboxylic acid is selected from the group consisting of phthalic anhydride, isophthalic acid, terephlthalic acid, tetrahydrophthalic anhydride, tetrachlorphthalic anhydride, adipic acid, and sebacic acid.
Claim 4
Dependent Claim
30 words
The hot melt adhesive composition of claim 1 wherein the organic peroxide is selected from the group consisting of benzoyl peroxide, lauroyl peroxide, di-t-butyl peroxide, t-butyl perbenzoate and dicumyl peroxide.
Claim 5
Dependent Claim
21 words
The hot melt adhesive composition of claim 1, wherein an ethylene-vinyl acetate copolymer is added to said modified ethylene-vinyl acetate copolymer.
Claim 6
Dependent Claim
11 words
A film of the hot melt adhesive composition of claim 1.
Claim 7
Dependent Claim
16 words
A laminated product having as the adhesive layer the hot melt adhesive composition of claim 1.
References Cited (Backward Citations)
US3111500A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-09-14 | 1980-03-15 | 1980-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-14 | 1984-03-15 | 1984-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-14 | 1988-03-15 | 1988-09-14 | $7700.00 | Window Closed / Lapsed |