CA1230271A
Expired / Lapsed
CA
⏱️ 0.0 years remaining
Rotational molding grade lldpe resin
Assignee: Imperial Oil Ltd
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Filing: 1983-12-12
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Granted: 1987-12-15
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Expires: 2003-12-12
Abstract
Abstract ROTATIONAL MOLDING GRADE LLDPE RESIN ABSTRACT OF THE DISCLOSURE Processed linear low density polyethylene (LLDPE) for rotomolding comprising LLDPE granules having additive material incorporated into said granules or onto said granules and characterized as free flowing powder having a particle size distribution of less than 5 weight percent larger than 30 mesh and less than 25 weight percent (preferably less than 15 weight percent) finer than 100 mesh, produced by mixing LLDPE granules and additive material in intensive mixers to produce a product having bulk density at least 20% greater than the bulk density of the corresponding unprocessed LLDPE.
Inventors
- 👤 Robert A. Taylor
- 👤 Ahmed A. Alim
Bibliographic Details
Application Number
—
Jurisdiction
CA
Data Source
google_patents
Last Synchronized
2026-11-01 23:54
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/20; C08J3/203; B; B29; B29C; B29C41/00; B29C41/003; B29C41/02; B29C41/04; B29K; B29K2023/00; B29K2023/04; B29K2023/06; B29K2995/00; B29K2995/0037; B29K2995/0063; C08J2323/00; C08J2323/02; C08J2323/16
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
98 words
The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows: 1. A processed linear low density polyethylene for use in rotational molding comprising linear low density polyethylene granules having additive material incorporated into said granules or onto said granules and further characterized as free flowing powder having a particle size distribution of less than 5 weight % larger than 30 mesh and less than 25 weight % finer than 100 mesh and bulk density at least 20% greater than the bulk density of the corresponding unprocessed linear low density polyethylene.
Claim 2
Dependent Claim
25 words
The processed linear low density polyethylene according to claim 1 wherein said particle size distribution is less than 2 weight % larger than 30 mesh.
Claim 3
Dependent Claim
24 words
The processed linear low density polyethylene wherein said granules tend to be rounded and more spherical than the corresponding unprocessed linear low density polyethylene.
Claim 4
Dependent Claim
37 words
The processed linear low density polyethylene according to claim 1 wherein the total amount of additive material is between about 500 and 10,000 ppm concentration, based on the combined weight of the granules and additive material. 18
Claim 5
Dependent Claim
35 words
The processed linear low density polyethylene according to claim 4 wherein the total amount of additive material is between about 1,000 and 5,000 ppm based on the combined weight of the granules and additive material.
Claim 6
Dependent Claim
22 words
The processed linear low density polyethylene according to claim 1 wherein said additive material is at least partially coated onto said granules.
Claim 7
Dependent Claim
27 words
The processed linear low density polyethylene according to claim 1 wherein said additive material is impinged and adhered to the surface of said granules in discrete particles.
Claim 8
Dependent Claim
28 words
The processed linear low density polyethylene according to claim 7 wherein said discrete particles of additive material are in the range of between about 1 to 1,000 microns.
Claim 9
Dependent Claim
117 words
A processed linear low density polyethylene product comprising free flowing granules having additive material incorporated into said granules or onto said granules, a particle size distribution of less than 5 weight % larger than 30 mesh and less than 25 weight % finer than 100 mesh produced by the process of mixing said additive material and linear low density polyethylene having a particle size distribution between about 5 and 200 mesh and bull density of between about 20 and about 32 pounds per cubic foot in an intensive mixer until at least 80% of the 19 linear low density polyethylene granules are smaller than about 30 mesh and the bulk density thereof has increased at least 20%.
Claim 10
Dependent Claim
23 words
The processed linear low density polyethylene product according to claim 9 wherein said additive material is a solid, liquid, gas or mixture thereof.
Claim 11
Dependent Claim
18 words
The processed linear low density polyethylene product according to claim 10 wherein said additive material is a solid.
Claim 12
Dependent Claim
24 words
The processed linear low density polyethylene product according to claim 11 wherein said solid additive material has a lower melting point than said granules.
Claim 13
Dependent Claim
24 words
The processed linear low density polyethylene product according to claim 11 wherein said solid additive material has a melting point higher than said granules.
Claim 14
Dependent Claim
18 words
The processed linear low density polyethylene product according to claim 10 wherein said additive material is a liquid.
Claim 15
Dependent Claim
17 words
The processed linear low density polyethylene product according to claim 10 wherein said additive material is gaseous.
Claim 16
Dependent Claim
27 words
The processed linear low density polyethylene product according to claim 11 wherein said solid additive material has particle size in the range between 1 and 1,000 microns.
Claim 17
Dependent Claim
24 words
The processed linear low density polyethylene product according to claim 9 wherein the temperature during mixing is in the range of 150.degree.F to 250.degree.F.
Claim 18
Dependent Claim
20 words
The processed linear low density polyethylene product according to claim 9 wherein said granules are recovered aster mixing and cooled.
Claim 19
Dependent Claim
20 words
The processed linear low density polyethylene product according to claim 9 wherein said granules are screened after said mixing. 21
References Cited (Backward Citations)
No citation records indexed.
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