Silicone copolymer modified release tapes
First Claim
1. A release coated backing material comprising a backing web having a first face and a second face, at least the first face having a substantially tack free release coating of a blend of a MQ resin and a thermoplastic copolymer having polyorganosiloxane segments and hard segments having a Tg of at least 20°
- C. wherein the amount of MQ resin is between 1 and 30 weight percent of the polyorganosiloxane content.
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Accused Products
Abstract
There is provided a block, segmented or graft copolymer having polyorganosiloxane segments and self-associating hard segments, which copolymer is capable of forming a solid, generally non-tacky release coating without the requirement of curing. The release coating comprises the polyorganosiloxane copolymer admixed with an MQ resin wherein the amount of MQ resin is generally between 1 and 30 weight percent of the polyorganosiloxane content preferably 1 to 20 weight percent. The MQ resin modifies the copolymer release material to have a higher release than the copolymer itself, generally at least 10 percent and preferable at least 20 percent up to 50 percent or higher with the readhesion values decreasing by 50 percent or less, preferably 40 percent or less.
50 Citations
48 Claims
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1. A release coated backing material comprising a backing web having a first face and a second face, at least the first face having a substantially tack free release coating of a blend of a MQ resin and a thermoplastic copolymer having polyorganosiloxane segments and hard segments having a Tg of at least 20°
- C. wherein the amount of MQ resin is between 1 and 30 weight percent of the polyorganosiloxane content.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48)
Specification