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US 4,337,107 AGranted
Abrasion-resistant transfer laminating sheet material
AssigneeMinnesota Mining and Manufacturing Company
InventorRonald J. Eshleman
Life of this patent
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Abstract
Flexible mar-resistant transferable laminating sheet materials comprise multilayers, said layers being a strippable carrier substrate, an epoxy-terminated silane abrasion-resistant polymer with improved weathering properties, a pressure-sensitive adhesive, and a release sheet.
Claims14
A multilayered sheet of material for providing a transferrable abrasion-resistant coating capable of lamination comprising in sequence
- a. a strippable carrier substrate;
- b. a flexible abrasion-resistant coating on the said carrier substrate wherein said coating is from 1.27 to 25.4 .mu.m thick and comprises a polymer which has at most 30% haze according to ASTM D 968-51 using 1 liter of sand in 10-11 seconds, said polymer having
- (1) 25 to 60% by weight units derived from precondensed monomers which are epoxy-terminated silanes of the formulae ##STR4## wherein R is selected from alkylene of 1 to 10 carbon atoms and --CH.sub.2 --O--(CH.sub.2).sub.m, wherein m is 1 to 5, n is 1, and R' is selected from alkyl of 1 to 8 carbon atoms,
- (2) 40 to 75% by weight units derived from epoxidized organic compounds other than epoxy silanes, and
- (3) from 0.1 to 5% by weight of an antioxidant;
- c. a coated pressure-sensitive adhesive layer which is from 0.5 to 13 .mu.m thick;
- and
- d. a strippable release sheet comprised of a liner substrate with a low adhesion backsize;
- wherein
- the release force between the abrasion-resistant coating, peeled at a 180.degree. angle, and the carrier substrate is <25 g/2.54 cm width, and
- the release force between the release sheet, peeled at a 180.degree. angle, and the pressure-sensitive adhesive coating is <10 g/2.54 cm width.
8 more elements
Dependencies are inferred from the claim text.