Pressure-sensitive adhesives comprising low molecular weight acid-functional acrylic resins and methods of making and using same
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C08F-020/26
C08L-033/02
A01H-005/00
B32B-027/00
C09J-133/14
C08F-002/06
C09J-133/02
B32B-037/12
C08K-003/28
출원번호
US-0405732
(2013-05-29)
등록번호
US-9657204
(2017-05-23)
국제출원번호
PCT/EP2013/061071
(2013-05-29)
국제공개번호
WO2013/182463
(2013-12-12)
발명자
/ 주소
Gerst, Matthias
Gross, Michael
Galvan, Rafael
출원인 / 주소
BASF SE
대리인 / 주소
Meunier Carlin & Curfman LLC
인용정보
피인용 횟수 :
0인용 특허 :
6
초록▼
Disclosed herein are compositions comprising a first copolymer derived from monomers comprising a (meth)acrylate monomer, an acid monomer, and optionally at least one additional monomer selected from the group consisting of styrene, a-methyl-styrene, vinyl toluene, and mixtures thereof, wherein the
Disclosed herein are compositions comprising a first copolymer derived from monomers comprising a (meth)acrylate monomer, an acid monomer, and optionally at least one additional monomer selected from the group consisting of styrene, a-methyl-styrene, vinyl toluene, and mixtures thereof, wherein the first copolymer is derived in the absence of a molecular weight regulator and wherein the first copolymer has a weight average molecular weight of less than 10,000 Daltons, and methods of making the same. The compositions and methods disclosed can be used, for instance, in pressure-sensitive adhesive applications.
대표청구항▼
1. A pressure-sensitive adhesive, comprising: a first copolymer derived from monomers comprising a (meth)acrylate monomer and an acid monomer, wherein the (meth)acrylate monomer includes a (meth)acrylate monomer having a theoretical glass transition temperature for its corresponding homopolymer of 8
1. A pressure-sensitive adhesive, comprising: a first copolymer derived from monomers comprising a (meth)acrylate monomer and an acid monomer, wherein the (meth)acrylate monomer includes a (meth)acrylate monomer having a theoretical glass transition temperature for its corresponding homopolymer of 80° C. or greater and a (meth)acrylate monomer having a theoretical glass transition temperature for its corresponding homopolymer of 0° C. or less;wherein the first copolymer is polymerized at a temperature of at least 150° C., andwherein the first copolymer has a weight average molecular weight of from 2,000 to 7,000 Daltons. 2. The pressure-sensitive adhesive according to claim 1, wherein the acid monomer includes acrylic acid, methacrylic acid, itaconic acid, or a mixture thereof. 3. The pressure-sensitive adhesive according to claim 1, wherein the first copolymer is further derived from at least one additional monomer selected from the group consisting of styrene, a-methylstyrene, vinyl toluene, and mixtures thereof. 4. The pressure-sensitive adhesive according to claim 1, wherein the first copolymer has an acid number of from 35 to 85. 5. The pressure-sensitive adhesive according to claim 1, wherein the first copolymer has a measured glass-transition temperature of from −70° C. to 20° C. 6. The pressure-sensitive adhesive according to claim 5, wherein the first copolymer has a measured glass-transition temperature of from −40° C. to 0° C. 7. The pressure-sensitive adhesive according to claim 1, further comprising a second copolymer. 8. The pressure-sensitive adhesive according to claim 7, wherein the second copolymer is present in an amount of from 60% to 95% by weight of the total amount of the first copolymer and the second copolymer. 9. The pressure-sensitive adhesive according to claim 7, wherein the measured glass transition temperature of the first copolymer is higher than the measured glass transition temperature of the second copolymer. 10. The pressure-sensitive adhesive according to claim 7, wherein the measured glass transition temperature of the second copolymer is less than −20° C. 11. The pressure-sensitive adhesive according to claim 1, further comprising an aqueous medium. 12. The pressure-sensitive adhesive according to claim 11, wherein the aqueous medium includes ammonia. 13. A label, film, or tape comprising the pressure-sensitive adhesive according to claim 1. 14. A method of making a pressure-sensitive adhesive, comprising: polymerizing monomers including a (meth)acrylate monomer and an acid monomer, wherein the (meth)acrylate monomer includes a (meth)acrylate monomer having a theoretical glass transition temperature for its corresponding homopolymer of 80° C. or greater and a (meth)acrylate monomer having a theoretical glass transition temperature for its corresponding homopolymer of 0° C. or less, at a polymerization temperature of at least 150° C. to produce a first copolymer having a weight average molecular weight of from 2,000 to 7,000 Daltons; andpreparing a pressure-sensitive adhesive from the first copolymer. 15. The method according to claim 14, wherein the polymerizing step comprises mass polymerizing the monomers to produce the first copolymer. 16. The method according to claim 14, wherein the acid monomer includes acrylic acid, methacrylic acid, itaconic acid, or a mixture thereof. 17. The method according to claim 14, wherein the monomers further include at least one additional monomer selected from the group consisting of styrene, a-methylstyrene, vinyl toluene, and mixtures thereof. 18. The method according to claim 14, wherein the first copolymer has an acid number ranging from 35 to 85. 19. The method according to claim 14, wherein the first copolymer has a measured glass transition temperature of from 70° C. to 20° C. 20. The method according to claim 19, wherein the first copolymer has a measured glass transition temperature ranging from −40° C. to 0° C. 21. The method according to claim 14, further comprising the step of adding ammonia to the first copolymer to produce a pH of from 6 to 9. 22. The method according to claim 14, further comprising the step of mixing the first copolymer with a second copolymer to produce a copolymer blend. 23. A method of adhering two surfaces comprising applying a pressure-sensitive adhesive of claim 1 to at least a first surface and adhering a second surface to the first surface. 24. The pressure-sensitive adhesive according to claim 1, wherein the monomers do not include a vinyl aromatic monomer. 25. The pressure-sensitive adhesive according to claim 1, wherein the monomers consist essentially of the (meth)acrylate monomer and the acid monomer. 26. The method according to claim 14, wherein the monomers do not include a vinyl aromatic monomer. 27. A pressure-sensitive adhesive, comprising: a first copolymer derived from monomers comprising a (meth)acrylate monomer and an acid monomer in an aqueous medium, wherein the (meth)acrylate monomer includes a (meth)acrylate monomer having a theoretical glass transition temperature for its corresponding homopolymer of 80° C. or greater and a (meth)acrylate monomer having a theoretical glass transition temperature for its corresponding homopolymer of 0° C. or less;wherein the aqueous medium includes ammonia,wherein the first copolymer is polymerized at a temperature of at least 150° C., andwherein the first copolymer has a weight average molecular weight of less than 10,000 Daltons. 28. A pressure-sensitive adhesive, comprising: a first copolymer derived from monomers comprising a (meth)acrylate monomer and an acid monomer, wherein the (meth)acrylate monomer includes a (meth)acrylate monomer having a theoretical glass transition temperature for its corresponding homopolymer of 80° C. or greater and a (meth)acrylate monomer having a theoretical glass transition temperature for its corresponding homopolymer of 0° C. or less;wherein the monomers contain zero percent of by weight a vinyl aromatic monomer,wherein the first copolymer is polymerized at a temperature of at least 150° C., andwherein the first copolymer has a weight average molecular weight of less than 10,000 Daltons. 29. A method of making a pressure-sensitive adhesive of claim 27, comprising: polymerizing monomers including a (meth)acrylate monomer and an acid monomer in an aqueous medium, wherein the (meth)acrylate monomer includes a (meth)acrylate monomer having a theoretical glass transition temperature for its corresponding homopolymer of 80° C. or greater and a (meth)acrylate monomer having a theoretical glass transition temperature for its corresponding homopolymer of 0° C. or less, at a polymerization temperature of at least 150° C. to produce a first copolymer having a weight average molecular weight of less than 10,000 Daltons;adding ammonia to the aqueous medium; andpreparing a pressure-sensitive adhesive from the first copolymer. 30. A method of making a pressure-sensitive adhesive of claim 28, comprising: polymerizing monomers including a (meth)acrylate monomer and an acid monomer, wherein the (meth)acrylate monomer includes a (meth)acrylate monomer having a theoretical glass transition temperature for its corresponding homopolymer of 80° C. or greater and a (meth)acrylate monomer having a theoretical glass transition temperature for its corresponding homopolymer of 0° C. or less, at a polymerization temperature of at least 150° C. to produce a first copolymer having a weight average molecular weight of less than 10,000 Daltons, wherein the monomers do not include a vinyl aromatic monomer; andpreparing a pressure-sensitive adhesive from the first copolymer.
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