US4906691A
Expired / Lapsed
US
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Adhesive compositions made with condensed phase polymers and sheet materials coated therewith
Assignee: 3M Co
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Filing: 1987-10-09
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Granted: 1990-03-06
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Expires: 2007-10-09
Abstract
Abstract The present invention relates to pressure-sensitive adhesive compositions comprising tackified elastomeric copolymers or block copolymers, e.g., based upon styrene/isoprene, having a novel condensed phase structure wherein polymer branches occur along the polymer backbone, either at a predetermined location or at random locations. The invention also provides sheet materials coated with the adhesive compositions. The polymers of the present invention are made by a method which comprises the step of reacting, under polymerization conditions, hydrocarbyl lithium initiator, at least one anionically polymerizable compound, and an organometallic-substituted styrene condensing agent. The reactants may be added simultaneously to produce a copolymer with polymer branch segments randomly located along the polymer backbone or sequentially to produce a copolymer with branches located at the same predetermined location along the polymer backbone. The resultant polymers may be further reacted with a linking agent to form multi-arm copolymers. The resultant elastomeric polymers are compatible with any of a wide variety of known tackifier resins and plasticizers to produce unique pressure-sensitive adhesive compositions.
Inventors
- 👤 Eugene G. Joseph
- 👤 Spencer F. Silver
- 👤 William R. Bronn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:58
CPC Classifications
C; C09; C09J; C09J153/00; C08; C08F; C08F297/00; C08F297/02; C08F297/04; C08F297/046
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
177 words
A mormally tacky pressure-sensitive adhesive composition comprising: (a) an elastomeric anionic copolymer comprising the copolymerized reaction product of (1) hydrocarbyl lithium initiator; (2) at least one anionically polymerizable monomer; and (3) a condensing agent monomer having the general formula CH.sub.2 ═C(R')QY(R).sub.n (X).sub.m wherein Y is tetravalent Si, Ge, Sn, or Pb; X is H, --OR", CI, Br or F, wherein R" is a monovalent lower alkyl group having from 1 to 6 carbon atoms; R is hydrogen, a monovalent lower alkyl group having from 1 to 6 carbon atoms, or phenyl; Q is phenylene; ' is hydrogen, a monovalent lower alkyl group having from 1 to 6 carbon atoms, or phenyl; m is an integer of 1,2 or 3; and n is an integer equal to 3-m; and wherein the mole ratio of (1) to (3) is about (1+m):1 and wherein the mole percentage of condensing agent in each copolymer segment containing said condensing agent is in the range of about 0.01% to about 5%; and (b) sufficient compatible tackifier to endow the composition with adhesive tack.
Claim 2
Dependent Claim
177 words
A mormally tacky pressure-sensitive adhesive composition comprising: (a) an elastomeric anionic copolymer comprising the copolymerized reaction product of (1) hydrocarbyl lithium initiator; (2) at least one anionically polymerizable monomer; and (3) a condensing agent monomer having the general formula CH.sub.2 ═C(R')QY(R).sub.n (X).sub.m wherein Y is tetravalent Si, Ge, Sn, or Pb; X is H, --OR", CI, Br or F, wherein R" is a monovalent lower alkyl group having from 1 to 6 carbon atoms; R is hydrogen, a monovalent lower alkyl group having from 1 to 6 carbon atoms, or phenyl; Q is phenylene; ' is hydrogen, a monovalent lower alkyl group having from 1 to 6 carbon atoms, or phenyl; m is an integer of 1,2 or 3; and n is an integer equal to 3-m; and wherein the mole ratio of (1) to (3) is about (1+m):1 and wherein the mole percentage of condensing agent in each copolymer segment containing said condensing agent is in the range of about 0.01% to about 5%; and (b) sufficient compatible tackifier to endow the composition with adhesive tack.
Claim 3
Dependent Claim
28 words
The normally tacky pressure-sensitive adhesive composition of claim 1 wherein said anionically polymerizable monomer is selected from the group consisting of vinyl aromatic monomer and conjugated diene monomer.
Claim 4
Dependent Claim
26 words
The normally tacky pressure-sensitive adhesive composition of claim 2 wherein said vinyl aromatic monomer is selected from the group consisting of styrene, alpha-methylstyrene, para-methylstyrene and t-butylstyrene.
Claim 5
Dependent Claim
25 words
The normally tacky pressure-sensitive adhesive composition of claim 2 wherein said conjugated diene monomer is selected from the group consisting of butadiene, isoprene, and piperylene.
Claim 6
Dependent Claim
34 words
The normally tacky pressure-sensitive adhesive composition of claim 1 wherein the mole percentage of said condensing agent in each copolymer segment cotaining condensing agent is in the range of about 0.02% to about 2%.
Claim 7
Dependent Claim
28 words
The normally tacky pressure-sensitive adhesive composition of claim 1 wherein said condensing agent has the general formula CH.sub.2 ═C(H)QSi(CH.sub.3).sub.n (X).sub.m where X is F, Cl, Br or methoxy.
Claim 8
Dependent Claim
167 words
A normally tacky pressure-sensitive adhesive composition comprising: (a) an elastomeric copolymer represented by the formula (B/Z).sub.y where: B/Z is an elastomeric copolymer of conjugated diene compound and a condensing reagent having the general formula CH.sub.2 ═C(R')QY(R).sub.n (X).sub.m where: X is H, --OR", Cl, Br or F wherein R" is a monovalent lower alkyl group having from 1 to 6 carbon atoms; R is hydrogen or a monovalent lower alkyl group having from 1 to 6 carbon atoms or a phenyl; Y is tetravalent Si, Ge, Sn or Pb; Q is phenylene; R' is hydrogen, a monovalent lower alkyl group having from 1 to 6 carbon atoms or phenyl; m is an integer of 1, 2 or 3; and n is an integer equal to 3-m; Y is an integer from 1 to about 50; and wherein the mole percentage of Z in the segment B/Z is in the range of about 0.01% to about 1%; and (b) sufficient compatible tackifier to endow the composition with adhesive tack.
Claim 9
Dependent Claim
167 words
A normally tacky pressure-sensitive adhesive composition comprising: (a) an elastomeric copolymer represented by the formula (B/Z).sub.y where: B/Z is an elastomeric copolymer of conjugated diene compound and a condensing reagent having the general formula CH.sub.2 ═C(R')QY(R).sub.n (X).sub.m where: X is H, --OR", Cl, Br or F wherein R" is a monovalent lower alkyl group having from 1 to 6 carbon atoms; R is hydrogen or a monovalent lower alkyl group having from 1 to 6 carbon atoms or a phenyl; Y is tetravalent Si, Ge, Sn or Pb; Q is phenylene; R' is hydrogen, a monovalent lower alkyl group having from 1 to 6 carbon atoms or phenyl; m is an integer of 1, 2 or 3; and n is an integer equal to 3-m; Y is an integer from 1 to about 50; and wherein the mole percentage of Z in the segment B/Z is in the range of about 0.01% to about 1%; and (b) sufficient compatible tackifier to endow the composition with adhesive tack.
Claim 10
Dependent Claim
26 words
An adhesive coated sheet material comprising a backing having at least one major surface at least partially coated with the pressure-sensitive adhesive composition of claim 7.
Claim 11
Dependent Claim
30 words
The normally tacky pressure-sensitive adhesive composition of claim 7 wherein said elastomeric copolymer is based upon a conjugated diene compound selected from the group consisting of butadiene, isoprene, and piperylene.
Claim 12
Dependent Claim
29 words
The normally tacky pressure-sensitive adhesive composition of claim 7 wherein said mole percentage of Z in the segment B/Z is in the range of about 0.02% to about 0.2%.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1993-03-05 | 1993-09-04 | 1994-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-03-05 | 1997-09-04 | 1998-03-06 | $3760.00 | Window Closed / Lapsed |
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