Preparation of polyolefin-based adhesives
AssigneeEquistar Chemicals, LP
InventorsChun D. Lee, Charles S. Holland, Maged G. Botros
Life of this patent
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Abstract
Disclosed is a polyolefin-based adhesive. The adhesive comprises a maleated polyolefin. The maleated polyolefin is let-down in a linear low density polyethylene (LLDPE). The let-down LLDPE is selected from those which have a melt index MI2 within the range of 0.1 dg/min to 5 dg/min, preferably from 1 dg/min to 3 dg/min, and comprises a TREF soluble fraction having an intrinsic viscosity less than 0.9 dl/g. The adhesive composition can be used in multilayer polyolefin films and multilayer pipes.
Claims13
An adhesive composition comprising:
- (i) 2 to 30 wt. %, based upon the total weight of the adhesive composition, of a maleated polyolefin;
- and
- (ii) a linear low density polyethylene (LLDPE), wherein the LLDPE comprises;
- greater than 15 to less than 20 wt. %, based upon the total weight of the LLDPE, of a TREF soluble fraction in ortho-dichlorobenzene, wherein the TREF soluble fraction has an intrinsic viscosity of greater than 0.3 to less than 0.7 dl/g as measured in ortho-dichlorobenzene at 150° C., and wherein the LLDPE has a melt index MI2 from 0.1 dg/in to 3 dg/min
- wherein the TREF soluble fraction is measured from the peak area of the TREF curve below 45° C.
A process for producing a polyolefin-based adhesive, comprising:
- (i) blending 2 to 30 wt. %, based upon the total weight of the adhesive composition, of a maleated polyolefin;
- and
- (ii) a linear low density polyethylene (LLDPE), wherein the LLDPE comprises:
- greater than 15 to less than 20 wt.%, based upon the total weight of the LLDPE, of a TREF soluble fraction in ortho-dichlorobenzene, wherein the TREF soluble fraction has an intrinsic viscosity greater than 0.3 to less than 0.7 dl/g as measured in ortho-dichlorobenzene at 150° C., and wherein the LLDPE has a melt index MI2 from 0.1 dg/min to 3 dg/min
- wherein the TREF soluble fraction is measured from the peak area of the TREF curve below 45° C.
Dependencies are inferred from the claim text.