US4419473A
Expired / Lapsed
US
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Polyolefin plastic compositions having improved transparency
Assignee: MILLIKEN RESEARCH Corp A CORP OF
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Filing: 1982-05-20
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Granted: 1983-12-06
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Expires: 2002-05-20
Abstract
Abstract A polyolefin plastic composition is provided having improved transparency, which comprises: (a) a major portion of a linear, low density polyethylene polymer; (b) a di-acetal of sorbitol and an aromatic aldehyde in an amount sufficient to improve transparency characteristics; and (c) a di-acetal decomposition inhibitor in an amount sufficient to inhibit decomposition of said di-acetal.
Inventors
- 👤 Robert L. Mahaffey, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:43
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/08; C08L23/0807; C08L23/0815; C08K; C08K5/00; C08K5/04; C08K5/15; C08K5/156; C08K5/1575; C08L2205/00; C08L2205/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
83 words
A polyolefin plastic composition having improved transparency, which comprises: (a) a major portion of a linear, low density polyethylene polymer; (b) a di-acetal of sorbitol and an aromatic aldehyde in an amount sufficient to improve transparency characteristics; (c) a di-acetal decomposition inhibitor selected from metal sequestrants and acid neutralizers in an amount sufficient to inhibit decomposition of said di-acetal; and (d) said linear, low density polyethylene polymer further containing high acid catalyst residue in an amount sufficient to cause decomposition of said di-acetal.
Claim 2
Dependent Claim
83 words
A polyolefin plastic composition having improved transparency, which comprises: (a) a major portion of a linear, low density polyethylene polymer; (b) a di-acetal of sorbitol and an aromatic aldehyde in an amount sufficient to improve transparency characteristics; (c) a di-acetal decomposition inhibitor selected from metal sequestrants and acid neutralizers in an amount sufficient to inhibit decomposition of said di-acetal; and (d) said linear, low density polyethylene polymer further containing high acid catalyst residue in an amount sufficient to cause decomposition of said di-acetal.
Claim 3
Dependent Claim
13 words
The composition of claim 1 wherein said decomposition inhibitor is a metal sequestrant.
Claim 4
Dependent Claim
13 words
The composition of claim 1 wherein said decomposition inhibitor is an acid neutralizer.
Claim 5
Dependent Claim
26 words
The composition of claim 1 wherein said di-acetal is selected from dibenzylidene sorbitol; di-p-chlorobenzylidene sorbitol; di-m-chlorobenzylidene sorbitol; O-benzylidene-O-p-chlorobenzylidene sorbitol; di-m-bromobenzylidene sorbitol; bis(3,4-dichlorobenzylidene) sorbitol; and di-tolylidene sorbitol.
Claim 6
Dependent Claim
11 words
the composition of claim 4 wherein said di-acetal is di-p-chlorobenzylidene sorbitol.
Claim 7
Dependent Claim
36 words
The composition of claim 2 wherein said sequestrant is selected from phosphites, carboxylic acid salts, amines, salts of amino acids, polyalkylene glycols, phosphates, phosphines, hydroxy carbonyl compounds, dicarbonyl compounds, polyhydroxy compounds, crown ethers, hydrazones and hydrazides.
Claim 8
Dependent Claim
25 words
The composition of claim 3 wherein said acid neutralizer is selected from amines, alkenes, epoxides, strained cyclic esters, organo metallics, acid anhydrides and reactive alcohols.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-12-05 | 1987-06-06 | 1987-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-05 | 1991-06-06 | 1991-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-05 | 1995-06-06 | 1995-12-06 | $7700.00 | Window Closed / Lapsed |