US4412030A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot melt adhesive compositions employing resins based on 2-methyl styrene, styrene and a phenol
Assignee: Ingredion Inc
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Filing: 1982-04-30
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Granted: 1983-10-25
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Expires: 2002-04-30
Abstract
Abstract Resins suitable for adhesives are based on α-methyl styrene, styrene and phenol in certain percentages, viz. 25 to 63, 35 to 73 and 2 to 15 percent by weight, respectively. Combinations of resin, ethylene vinyl acetate copolymer, atactic polypropylene, ethyl acrylate copolymer or a thermoelastomer and optionally a wax or tackifying oil yield excellent adhesives, in particular hot-melt adhesives.
Inventors
- 👤 Yves Runavot
- 👤 Georges Billault
- 👤 Jaques Salvetat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:44
CPC Classifications
C; C09; C09J; C09J165/00; C08; C08F; C08F212/00; C08F212/02; C08F212/04; C08F212/06; C08F212/12; C08G; C08G61/00; C08G61/02; C09J125/00; C09J125/02; C09J125/04; C09J125/06; C09J125/16; C08L; C08L2666/00; C08L2666/02; C08L2666/04
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
118 words
A hot melt adhesive composition comprising: (a) a first resin having an average molecular weight of 400 to 2,000, based on α-methyl styrene, stryene and a phenol as constitutents, characterized in that the weight percentages of α-methyl styrene, styrene and a phenol with a structural formula ##STR2## in which R is hydrogen or a C 1 -C 12 alkyl group, which compounds are substantially the sole constituents, range from 25 to 63, from 35 to 73 and from 2 to 15 parts by weight of the resin, respectively; and (b) a second resin selected from the group consisting essentially of copolymers of ethylene vinyl acetate containing 25-65% vinyl acetate, atactic polypropylene, ethylacrylate copolymers, natural rubbers and synthetic rubbers.
Claim 2
Dependent Claim
118 words
A hot melt adhesive composition comprising: (a) a first resin having an average molecular weight of 400 to 2,000, based on α-methyl styrene, stryene and a phenol as constitutents, characterized in that the weight percentages of α-methyl styrene, styrene and a phenol with a structural formula ##STR2## in which R is hydrogen or a C 1 -C 12 alkyl group, which compounds are substantially the sole constituents, range from 25 to 63, from 35 to 73 and from 2 to 15 parts by weight of the resin, respectively; and (b) a second resin selected from the group consisting essentially of copolymers of ethylene vinyl acetate containing 25-65% vinyl acetate, atactic polypropylene, ethylacrylate copolymers, natural rubbers and synthetic rubbers.
Claim 3
Dependent Claim
55 words
The hot melt adhesive composition of claim 1 wherein the resin of part (b) is selected from the group consisting of ethylene vinyl acetate containing 25-65% vinyl acetate, atactic polypropylene and ethylacrylate copolymers and the weight ratio of the resin of (a) and the resin of (b) is within the range of 1:0.3 to 1:3.
Claim 4
Dependent Claim
26 words
The hot melt adhesive composition of claim 2 wherein the resin of (a) and the resin of (b) is within the range of 1:05 to 1:2.
Claim 5
Dependent Claim
25 words
The hot melt adhesive composition of claim 1 wherein the resin of part (b) is a copolymer of ethylene vinyl acetate containing 38-55% vinyl acetate.
Claim 6
Dependent Claim
42 words
The hot melt adhesive composition of claim 1 wherein the resin of part (b) is a natural or synthetic rubber and the weight ratio of the resin of (a) and the resin of (b) is within the range of 35:65 and 60:40.
Claim 7
Dependent Claim
30 words
The hot melt adhesive composition of claim 5 wherein the weight ratio of the resin of (a) and the resin of (b) is within the range of 40:60 and 50:50.
Claim 8
Dependent Claim
19 words
The hot melt adhesive composition of claim 1 wherein at least one wax or tackifying oil is additionally present.
Claim 9
Dependent Claim
25 words
The hot melt adhesive composition of claim 7 wherein the wax is present in an amount of 10 to 50% by weight of the composition.
Claim 10
Dependent Claim
24 words
The hot melt adhesive composition of claim 7 wherein the tackifying oil is present in an amount of 1-25% by weight of the composition.
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) | 1986-10-24 | 1987-04-25 | 1987-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-24 | 1991-04-25 | 1991-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-24 | 1995-04-25 | 1995-10-25 | $7700.00 | Window Closed / Lapsed |