US3856885A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for molding thermosetting resinous compositions
Assignee: Dai Nippon Toryo Co Ltd
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Filing: 1972-10-26
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Granted: 1974-12-24
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Expires: 1992-10-26
Abstract
Abstract This invention relates to a process for molding a thermosetting resinous composition, which comprises heating a liquid composition comprising an unsaturated alkyd resin, a vinyl chloride resin, a vinyl monomer and/or a reactive plasticizer, and a polymerization initiator at a temperature ranging from 80* to 160*C. to such an extent that the composition is not completely cured, cooling the composition to obtain a non-tacky partially-cured composition of a suitable form, and heating said partially-cured composition at a temperature ranging from 120* to 180*C. to complete the curing.
Inventors
- 👤 A Furuya
- 👤 Y Ishimaru
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:11
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/52; C08L; C08L67/00; C08L67/06
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
207 words
A PROCESS FOR THE PREPARATION OF A MOLDED ARTICLE FROM A THERMOSETTING RESIN OF THE UNSATURATED ALKYD TYPE, WHICH COMPRISES HEATING AT A TEMPERATURE RANGING FROM 80* TO 160*C, A LIQUID COMPOSITON OBTAINED BY SUFFICIENTLY AGITATING AND BLENDING A MIXTURE COMPRISING (A) 5 TO 70% BY WEIGHT OF AN UNSATURATED ALKYD RESIN HAVING AN AVERAGE DEGREE OF CONDENSATUON OF AT LEAST 4 AND A NUMBER AVERAGE MOLECULAR WEIGHT OF aT LEAST 1,000 AND WHICH IS A CONDENSATION PRODUCT OF AN UNSATURATED POLYCRBOXYLIC ACID WITH A POLYHYDRIC ALCOHOL, (B) 20 TO 70% BY WEIGHT OF A VINYL MONOMER SELECTED FROM THE GROUP CONSISTING OF STYRENE, CHLOROSTYRENE, TERT-BUTYL STYRENE, VINYL TOLUENE, DIVINYL BENZENE, VINYL ACETATE AND MONO ESTERS OF ACRYLIC ACID OR METHACRYLIC ACID, (C) 10 TO 65% BY WEIGHT OF A VINYL CHLORIDE RESIN WHICH IS A HOMOPOLYMER OF VINYL CHLORIDE OR A COPOLYMER OF VINYL CHLORIDE WITH A MINOR AMOUNT OF A COPOLYMERIZABLE VINYL MONOMER AND (D) 0.2 TO 3% WEIGHT OF A POLYMERIZATION INITIATOR, TO SUCH AN EXTENT THAT THE COMPOSITION IS NOT COMPLETELY CURED, COOLING THE COMPOSITION TO OBTAIN A PARTIALLY-CURED NON-TACKY SOLID COMPOSITION OF A MOLDABLE FORM, AND HEATING THE PARTIALLY-CURED COMPOSITION AT A TEMPERATURE RANGING FROM 120* TO 180*C TO COMPLETE THE CURING.
Claim 2
Dependent Claim
207 words
A PROCESS FOR THE PREPARATION OF A MOLDED ARTICLE FROM A THERMOSETTING RESIN OF THE UNSATURATED ALKYD TYPE, WHICH COMPRISES HEATING AT A TEMPERATURE RANGING FROM 80* TO 160*C, A LIQUID COMPOSITON OBTAINED BY SUFFICIENTLY AGITATING AND BLENDING A MIXTURE COMPRISING (A) 5 TO 70% BY WEIGHT OF AN UNSATURATED ALKYD RESIN HAVING AN AVERAGE DEGREE OF CONDENSATUON OF AT LEAST 4 AND A NUMBER AVERAGE MOLECULAR WEIGHT OF aT LEAST 1,000 AND WHICH IS A CONDENSATION PRODUCT OF AN UNSATURATED POLYCRBOXYLIC ACID WITH A POLYHYDRIC ALCOHOL, (B) 20 TO 70% BY WEIGHT OF A VINYL MONOMER SELECTED FROM THE GROUP CONSISTING OF STYRENE, CHLOROSTYRENE, TERT-BUTYL STYRENE, VINYL TOLUENE, DIVINYL BENZENE, VINYL ACETATE AND MONO ESTERS OF ACRYLIC ACID OR METHACRYLIC ACID, (C) 10 TO 65% BY WEIGHT OF A VINYL CHLORIDE RESIN WHICH IS A HOMOPOLYMER OF VINYL CHLORIDE OR A COPOLYMER OF VINYL CHLORIDE WITH A MINOR AMOUNT OF A COPOLYMERIZABLE VINYL MONOMER AND (D) 0.2 TO 3% WEIGHT OF A POLYMERIZATION INITIATOR, TO SUCH AN EXTENT THAT THE COMPOSITION IS NOT COMPLETELY CURED, COOLING THE COMPOSITION TO OBTAIN A PARTIALLY-CURED NON-TACKY SOLID COMPOSITION OF A MOLDABLE FORM, AND HEATING THE PARTIALLY-CURED COMPOSITION AT A TEMPERATURE RANGING FROM 120* TO 180*C TO COMPLETE THE CURING.
Claim 3
Dependent Claim
90 words
A process for the preparation of a molded article as set forth in claim 1, wherein the unsaturated alkyd resin is a condensation product formed from (i) 1 mole equivalent of an unsaturated dicarboxylic acid or a mixture of an unsaturated dicarboxylic acid with a saturated aliphatic dicarboxylic acid or aromatic dicarboxylic acid and (ii) 1 to 1.2 mole equivalents of neopentyl glycol or 1,6-hexanediol, or 1 to 1.2 mole equivalents of a mixture of at least 0.2 mole equivalent of neopentyl glycol, 1,6-hexanediol or both with another polyhydric alcohol.
Claim 4
Dependent Claim
51 words
A process for the preparation of a molded article as set forth in claim 1, wherein the vinyl chloride resin is a vinyl chloride resin powder for paste which has an average degree of a polymerization ranging from 500 to 2,500 and an average size of from 0.05 to 50 microns.
Claim 5
Dependent Claim
30 words
A process for the preparation of a molded article as set forth in claim 1, wherein the vinyl monomer is styrene or a mixture of styrene with other vinyl monomer.
Claim 6
Dependent Claim
83 words
A process for the preparation of a molded article as set forth in claim 1, wherein the polymerization initiator is (a) a polymerization initiator in which the decomposition temperature necessary for obtaining a half-value period of 1 minute is higher than 150*C or (b) a mixture composed of at least 80% by weight of said polymerization initiator (a), the balance being another polymerization initiator in which the decomposition temperature necessary for obtaining a half-value period of 1 minute is not higher than 150*C.
Claim 7
Dependent Claim
133 words
A process for the preparation of a molded article from a thermosetting resin of the unsaturated alkyd type, which comprises heating at a temperature ranging from 80* to 160*C a liquid composition obtained by sufficiently agitating and blending a mixture comprising (A) 5 to 70% by weight of an unsaturated alkyd resin having an average degree of condensation of at least 4 and a number average molecular weight of at least 1,000 and which is a condensation product of an unsaturated polycarboxylic acid with a polyhydric alcohol, (B) 20 to 70% by weight of a reactive plasticizer selected from the group consisting of alkyl esters of polycarboxylic acids, diesters of Alpha , Beta - unsaturated dibasic acids in which the alcohol moiety has 4 to 16 carbon atoms and esters having the formula
Claim 8
Dependent Claim
133 words
A process for the preparation of a molded article from a thermosetting resin of the unsaturated alkyd type, which comprises heating at a temperature ranging from 80* to 160*C a liquid composition obtained by sufficiently agitating and blending a mixture comprising (A) 5 to 70% by weight of an unsaturated alkyd resin having an average degree of condensation of at least 4 and a number average molecular weight of at least 1,000 and which is a condensation product of an unsaturated polycarboxylic acid with a polyhydric alcohol, (B) 20 to 70% by weight of a reactive plasticizer selected from the group consisting of alkyl esters of polycarboxylic acids, diesters of Alpha , Beta - unsaturated dibasic acids in which the alcohol moiety has 4 to 16 carbon atoms and esters having the formula
Claim 9
Dependent Claim
90 words
A process for the preparation of a molded article as set forth in claim 6, wherein the unsaturated alkyd resin is a condensation product formed from (i) 1 mole equivalent of an unsaturated dicarboxylic acid or a mixture of an unsaturated dicarboxylic acid with a saturated aliphatic dicarboxylic acid or aromatic dicarboxylic acid and (ii) 1 to 1.2 mole equivalents of neopentyl glycol or 1,6-hexanediol, or 1 to 1.2 mole equivalents of a mixture of at least 0.2 mole equivalent of neopentyl glycol, 1,6-hexanediol or both with another polyhydric alcohol.
Claim 10
Dependent Claim
30 words
A process for the preparation of a molded article as set forth in claim 6, wherein the vinyl monomer is styrene or a mixture of styrene with other vinyl monomer.
Claim 11
Dependent Claim
36 words
A process for the preparation of a molded article as set forth in claim 6, wherein the reactive plasticizer is at least one member selected from the group consisting of compounds expressed by the following formula
Claim 12
Dependent Claim
83 words
A process for the preparation of a molded article as set forth in claim 6, wherein the polymerization initiator is (a) a polymerization initiator in which the decomposition temperature necessary for obtaining a half-value period of 1 minute is higher than 150*C or (b) a mixture composed of at least 80% by weight of said polymerization initiator (a), the balance being another polymerization initiator in which the decomposition temperature necessary for obtaining a half-value period of 1 minute is not higher than 150*C.
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) | 1977-12-23 | 1978-06-24 | 1978-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-23 | 1982-06-24 | 1982-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-23 | 1986-06-24 | 1986-12-24 | $7700.00 | Window Closed / Lapsed |