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US4389514A
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Accelerated polymerization of acrylic monomers initiated by dialkyl and diaralkyl peroxide free radical generators in the presence of tin accelerators
Assignee: Congoleum Corp
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Filing: 1981-12-07
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Granted: 1983-06-21
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Expires: 2001-12-07
Abstract
Abstract A method of increasing the reaction rate of the polymerization and/or cross-linking of reactive polymerizable and/or cross-linkable acrylic monomeric materials initiated by dialkyl or diaralkyl peroxides as the free radical generator which comprises carrying out such a polymerization and/or cross-linking reaction in the presence of a member of the group consisting of stannous alkanoates, alkenoates, aralkanoates and aralkenoates, dialkyl tin dialkanoates, dialkenoates, diaralkanoates and diaralkenoates, or mixtures thereof in various proportions.
Inventors
- 👤 Claude J. Schmidle
- 👤 Seevaram N. Varadhachary
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:59
CPC Classifications
C; C08; C08F; C08F4/00; C08F4/40
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
82 words
In a method for increasing the reaction rate of the polymerization and/or cross-linking of reactive polymerizable and/or cross linkable acrylic monomeric materials initiated by dialkyl or diaralkyl peroxides as the free radical generator, the improvement which comprises carrying out such polymerization and/or cross-linking reaction in the presence of from at least 0.1 to about 9% by weight, of a stannous accelerator from the group consisting of stannous alkanoates, alkenoates, aralkanoates and aralkenoates, dialkyl stannous dialknoates, dialkenoates, diaralkanoates and diaralkenoates, and mixtures thereof.
Claim 2
Dependent Claim
82 words
In a method for increasing the reaction rate of the polymerization and/or cross-linking of reactive polymerizable and/or cross linkable acrylic monomeric materials initiated by dialkyl or diaralkyl peroxides as the free radical generator, the improvement which comprises carrying out such polymerization and/or cross-linking reaction in the presence of from at least 0.1 to about 9% by weight, of a stannous accelerator from the group consisting of stannous alkanoates, alkenoates, aralkanoates and aralkenoates, dialkyl stannous dialknoates, dialkenoates, diaralkanoates and diaralkenoates, and mixtures thereof.
Claim 3
Dependent Claim
56 words
A method as defined in claim 1, wherein said dialkyl or diaralkyl peroxide is present in a first layer and said reactive polymerizable and/or cross-linkable acrylic monomeric material and said tin accelerator are present in a second layer, prior to the initiation of the polymerization and/or cross-linking of the reactive polymerizable and/or cross-linkable acrylic monomeric material.
Claim 4
Dependent Claim
28 words
A method as defined in claim 2, wherein said dialkyl or diaralkyl peroxide is included only in portions of a predetermined pattern or design in said first layer.
Claim 5
Dependent Claim
28 words
A method as defined in claim 2, wherein said reactive polymerizable and/or cross-linkable acrylic monomeric material and said tin accelerator are included substantially uniformly in said second layer.
Claim 6
Dependent Claim
48 words
A method as defined in claim 1, wherein said dialkyl or diaralkyl peroxide, said reactive polymerizable and/or cross-linkable acrylic monomeric material and said tin accelerator are present in one layer, prior to the initiation of the polymerization and/or cross-linking of the reactive polymerizable and/or cross-linkable acrylic monomeric materials.
Claim 7
Dependent Claim
17 words
A method as defined in claim 1, wherein said tin accelerator is stannous octoate or stannous nonanoate.
Claim 8
Dependent Claim
50 words
A method as defined in claim 1, wherein said polymerization is carried out at a temperature of about 260° to 420° F. with a composition comprising about 5 to 50% by weight of said acrylic monomeric materials and about 1 to 40% by weight of said dialkyl or diaralkyl peroxide.
Claim 9
Dependent Claim
15 words
A method as defined in claim 1, wherein said tin accelerator is dibutyl tin dilaurate.
Claim 10
Dependent Claim
16 words
A method as defined in claim 1, wherein said dialkyl or diaralkyl peroxide is dicumyl peroxide.
Claim 11
Dependent Claim
16 words
A method as defined in claim 1, wherein said dialkyl or diaralkyl peroxide is di-t-butyl peroxide.
Claim 12
Dependent Claim
16 words
A method as defined in claim 1, wherein said dialkyl or diaralkyl peroxide is di-t-amyl peroxide.
Claim 13
Dependent Claim
20 words
A method as defined in claim 1, wherein said reactive polymerizable and/or cross-linkable acrylic monomeric material is trimethylol propane trimethacrylate.
Claim 14
Dependent Claim
19 words
A method as defined in claim 1, wherein said reactive polymerizable and/or cross-linkable acrylic monomeric material is pentaerythritol tetramethacrylate.
Claim 15
Dependent Claim
55 words
A method as defined in claim 3, for producing a product having dull areas on its surface which includes the step of carrying out said polymerization in contact with a dull or textured surface whereby said dull appearance is retained in areas where the dialkyl or diaralkyl peroxide is present after said polymerization is completed.
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) | 1986-06-20 | 1986-12-20 | 1987-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-20 | 1990-12-20 | 1991-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-20 | 1994-12-20 | 1995-06-21 | $7700.00 | Window Closed / Lapsed |