Process for producing a film using silane modified elastomeric compositions

• US 5,786,412 A
• Filed: 05/28/1996
• Issued: 07/28/1998
• Est. Priority Date: 11/03/1994
• Status: Expired due to Fees

• Current Assignee: Kimberly-Clark Worldwide Incorporated (Kimberly-Clark Corporation)
• Original Assignee: Kimberly-Clark Worldwide Incorporated (Kimberly-Clark Corporation)
• Inventors: Shah, Ketan N., Campbell, Stephen M.
• Primary Examiner(s): MERRIAM, ANDREW EDWIN
• Application Number:
  US08/653,996
• Time in Patent Office: 791 Days
• Field of Search: 524/264, 524/505, 524/579, 524/578, 525/88, 525/288, 525/326.5, 428/447, 264/211
• US Class Current: 524/264
• CPC Class Codes: C08J 2325/10 with conjugated dienes
• CPC Class Codes: C08J 5/18 Manufacture of films or sheets
• CPC Class Codes: C08K 5/5425 containing at least one C=C bond
• CPC Class Codes: C08L 25/10 with conjugated dienes
• CPC Class Codes: D01F 6/42 comprising cyclic compounds containing one carbon-to-carbon double bond in the side chain as major constituent
• CPC Class Codes: Y10T 428/2962 Silane, silicone or siloxane in coating
• CPC Class Codes: Y10T 428/31663 As siloxane, silicone or silane
• CPC Class Codes: Y10T 442/2025 Coating produced by extrusion
• CPC Class Codes: Y10T 442/218 Organosilicon containing
• CPC Class Codes: Y10T 442/223 Organosilicon containing
• CPC Class Codes: Y10T 442/2328 Organosilicon containing

Abstract

There is provided a melt extrudable, moisture curable thermoplastic polymer which is produced from a silane modified elastomeric polymer and which has improved hysteresis, reduced stress decay and improved creep properties. The polymer may be processed into a nonwoven web, film or foam which may be laminated to other materials such as spunbond polyolefin layers and may be used in medical, personal care, feminine hygiene and other applications.

Claims

1. A process of producing a film comprising the steps of:

adding to an elastomeric melt extrudable, thermoplastic polymer in an amount between about 0.01 and about 10 weight percent, a silane having the formula;

##STR2## wherein, Z is selected from the group consisting of double bonded groups capable of reaction under radical polymerization conditions;

R₁, R₂, and R₃ are selected from the group consisting of alkoxy, Cl, Br, ester, O--Si, alkyl and aryl groups, provided, however, that at least one R group must be reactive in order to function as a hydrolytically reactive agent;

extruding said polymer and forming said film and;

exposing said film to moisture for a time and temperature sufficient to cure said polymer.

2. The process of claim 1 wherein said silane is a vinyltrialkoxysilane.

3. The process of claim 2 wherein said film has a recovery strength of at least 15 percent greater at 50 percent extension, than a similar elastomeric film produced without silane modified polymer.