US4826550A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing molded product of thermochromic polyvinyl chloride
Assignee: Matsui Shikiso Chemical Co Ltd
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Filing: 1986-11-21
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Granted: 1989-05-02
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Expires: 2006-11-21
Abstract
Abstract A process for preparing a molded product of thermochromic polyvinyl chloride characterized by incorporating a thermochromic particulate material into a vinyl chloride plastisol comprising a vinyl chloride resin, plasticizer, stabilizer, lubricant and filler, and molding the resulting mixture. The thermochromic particulate material is prepared from particles of a non-thermoplastic resin having encapusated therein the three components of electron-donating chromogenic substance, electron-accepting substance and solvent by coating the particles with a hydrophilic high-molecular-weight compound.
Inventors
- 👤 Goro Shimizu
- 👤 Yoshimi Hayashi
- 👤 Yosuke Kitagawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:53
CPC Classifications
C; C08; C08K; C08K9/00; C08K9/10; Y; Y10; Y10S; Y10S428/00; Y10S428/913
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
139 words
Process for preparing a molded product comprising thermochromic polyvinyl chloride, which comprises incorporating a thermochromic particulate material into a vinyl chloride plastisol comprising a vinyl chloride resin, plasticizer, stabilizer and lubricant and molding and heating the resulting mixture to form the product, the thermochromic particulate material being prepared from particles of a non-thermoplastic resin having encapsulated therein the three components of electron donating chromogenic substance, electron accepting substance and solvent, said three components comprising a thermally color changeable reversible color system, by coating the particles with a hydrophilic high-molecular weight compound which is resistant to penetration of the plasticizer, stabilizer and lubricant therethrough into the particles and thereby providing the particles as corresponding double capsules having a hydrophilic high-molecular weight compound outer encapsulating and inward penetration protective layer and a non-thermoplastic resin inner encapsulating and outward penetration protective layer.
Claim 2
Dependent Claim
139 words
Process for preparing a molded product comprising thermochromic polyvinyl chloride, which comprises incorporating a thermochromic particulate material into a vinyl chloride plastisol comprising a vinyl chloride resin, plasticizer, stabilizer and lubricant and molding and heating the resulting mixture to form the product, the thermochromic particulate material being prepared from particles of a non-thermoplastic resin having encapsulated therein the three components of electron donating chromogenic substance, electron accepting substance and solvent, said three components comprising a thermally color changeable reversible color system, by coating the particles with a hydrophilic high-molecular weight compound which is resistant to penetration of the plasticizer, stabilizer and lubricant therethrough into the particles and thereby providing the particles as corresponding double capsules having a hydrophilic high-molecular weight compound outer encapsulating and inward penetration protective layer and a non-thermoplastic resin inner encapsulating and outward penetration protective layer.
Claim 3
Dependent Claim
31 words
Process of claim 1, wherein the plastisol also includes a petroleum solvent and the hydrophilic high-molecular weight compound is also resistant to penetration of the petroleum solvent therethrough into the particles.
Claim 4
Dependent Claim
68 words
Process of claim 1, wherein the hydrophilic high-molecular weight compound is selected from the group consisting of polyvinyl alcohol, polyacrylic acid, gelatin, methylcellulose and alginic acid, the non-thermoplastic resin is resistant to organic solvents, water and heat, the solvent is substantially water insoluble and has a boiling point of at least 150° C. at atmospheric pressure, and the particles are resistant to rupture when exposed to increased pressure.
Claim 5
Dependent Claim
19 words
Process of claim 1, wherein the molding is carried out in a mold to form a hollow shaped product.
Claim 6
Dependent Claim
38 words
Process of claim 2 wherein said molding comprises applying said mixture to a yarn by impregnation to form a coating thereon and passing the impregnated yarn through a molding nozzle and heating to form a coated yarn product.
Claim 7
Dependent Claim
12 words
Process of claim 5, wherein the yarn is a polyester filament yarn.
Claim 8
Dependent Claim
45 words
Process of claim 1 wherein said molding comprises applying said mixture by a molding element as an outer layer onto a vinyl chloride polymer base layer disposed on a substrate sheet, and heating the outer layer to form a double layer containing substrate sheet product.
Claim 9
Dependent Claim
27 words
Process of claim 7, wherein the base layer contains a coloring substance of a different color from that of the thermochromic particulate material in the outer layer.
Claim 10
Dependent Claim
13 words
Process of claim 1, wherein said vinyl chloride plastisol further comprises a filler.
References Cited (Backward Citations)
US3560229A
Cited
US3539375A
Cited
US3741628A
Cited
US3705037A
Cited
US4028118A
Cited
US4086054A
Cited
GB1405701A
Cited
US4054684A
Cited
US4341565A
Cited
GB2093055A
Cited
US4425161A
Cited
US4421560A
Cited
JPS5832671A
Cited
US4502066A
Cited
US4501876A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-05-01 | 1992-10-31 | 1993-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-01 | 1996-10-31 | 1997-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-01 | 2000-10-31 | 2001-05-02 | $7700.00 | Window Closed / Lapsed |