Synthetic rubber pressure-sensitive adhesive, pressure-sensitive adhesive sheet, and polishing member laminate
The invention provides a synthetic rubber pressure-sensitive adhesive which has excellent heat resistance and substrate adhesiveness, is capable of inhibiting offset, peeling or the like even in a high-temperature environment and is suitable for applications in a high-temperature environment, a pressure-sensitive adhesive sheet and a polishing member laminate. The synthetic rubber pressure-sensitive adhesive of the invention contains: a synthetic rubber (A) including a styrene-isoprene block copolymer, an adhesion-imparting resin (B), and a fatty acid ester (C) with a weight reduction rate of 1 wt % or less after being heated at 150° C. for 10 minutes. Based on 100 parts by weight of the synthetic rubber (A), the content of the adhesion-imparting resin (B) is set as α parts by weight to 60 parts by weight, and the content of the fatty acid ester (C) is set as 0.1 parts by weight to 10 parts by weight.
1. A synthetic rubber pressure-sensitive adhesive, comprising a synthetic rubber (A), an adhesion-imparting resin (B), and a fatty acid ester (C), wherein the synthetic rubber pressure-sensitive adhesive has the characteristics as follows:
the synthetic rubber (A) comprises a styrene-isoprene block copolymer,
a weight reduction rate of the fatty acid ester (C) after being heated at 150° C. for 10 minutes is 1 wt % or less, and
based on 100 parts by weight of the synthetic rubber (A), a content of the adhesion-imparting resin (B) is 5 parts by weight to 60 parts by weight, and a content of the fatty acid ester (C) is 0.1 parts by weight to 10 parts by weight.
2. The synthetic rubber pressure-sensitive adhesive according to claim 1 , wherein the synthetic rubber (A) comprises a styrene-isoprene block copolymer with a styrene content of 20 wt % to 40 wt % and a diblock content of 15 wt % to 70 wt %.
3. The synthetic rubber pressure-sensitive adhesive according to claim 2 , wherein the adhesion-imparting resin (B) comprises a terpene phenolic resin with a softening point of 95° C. to 170° C.
4. The synthetic rubber pressure-sensitive adhesive according to claim 1 , wherein the adhesion-imparting resin (B) comprises a terpene phenolic resin with a softening point of 95° C. to 170° C.
5. A pressure-sensitive adhesive sheet, provided with an adhesive layer formed of the synthetic rubber pressure-sensitive adhesive according to claim 1 on one side or both sides of a substrate.
6. The pressure-sensitive adhesive sheet according to claim 5 , used in polishing member fixing applications.
7. A polishing member laminate, integrated by bonding the pressure-sensitive adhesive sheet used in polishing member fixing applications according to claim 6 to a polishing member.
8. A pressure-sensitive adhesive sheet, provided with an adhesive layer formed of the synthetic rubber pressure-sensitive adhesive according to claim 2 on one side or both sides of a substrate.
9. A pressure-sensitive adhesive sheet, provided with an adhesive layer formed of the synthetic rubber pressure-sensitive adhesive according to claim 4 on one side or both sides of a substrate.
10. The pressure-sensitive adhesive sheet according to claim 8 , used in polishing member fixing applications.
11. The pressure-sensitive adhesive sheet according to claim 9 , used in polishing member fixing applications.
12. A polishing member laminate, integrated by bonding the pressure-sensitive adhesive sheet used in polishing member fixing applications according to claim 10 to a polishing member.
13. A polishing member laminate, integrated by bonding the pressure-sensitive adhesive sheet used in polishing member fixing applications according to claim 11 to a polishing member.