Film based on a composition of polymers and plasticizers having a tg ranging from -35°c to 40°c, element incorporating said film, method for manufacturing thereof and uses thereof
AssigneeHg3 S.à.r.l.
InventorsGerhard KARALL, Joel BLOMET, Annick DUVAL FERNANDEZ MATAMOROS
Life of this patent
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Abstract
Disclosed is a film based on a composition including at least one polymer and at least one plasticizer, the composition having a calculated Tg ranging from −35° C. to 40° C., preferably from −20° C. to 10° C., the film presenting a rebound resilience according to Test A less than 15%, preferably less than 10%; to a process for its manufacturing and to its uses; it also relates to an element incorporating the film and uses thereof.
Claims20
A film based on a composition comprising at least one polymer (k) and at least one plasticizer (i), said composition having a calculated Tg ranging from −35° C. to 40° C., said film presenting a rebound resilience according to Test A less than 15%,
- the calculated Tg being the Tg value estimated for miscible polymers by Fox theory, according to the following equation:
- 1
- Tg
- =
- ∑
- i
- =
- 1
- j
- =
- 10
-
-
- x
- i
- Tg
- i
- +
- ∑
- k
- =
- 1
- l
- =
- 20
-
-
- x
- k
- Tg
- k
- with
- ∑
- i
- =
- 1
- j
- =
- 10
-
-
- x
- i
- +
- ∑
- k
- =
- 1
- l
- =
- 20
-
-
- x
- k
- =
- 100
- Tgi being the measured Tg of each plasticizer i;
- xi being the relative weight amount of each plasticizer i;
- xk being the relative weight amount of each polymer k;
- Tgk being the measured Tg of each polymer k,
- Tg being measured from a dynamic mechanical analysis test (DMA) and being the maximum of tangent delta peak at 2 Hz.
Dependencies are inferred from the claim text.