Claims
- 1. A process for producing cellular polymerization products which comprises reacting and foaming a reaction mixture comprising: (a) a di-(3,4-dihydro-2H-pyranyl) compound, (b) a hydroxyl-substituted 1,3-cyclic acetal or an ester condensation product of said hydroxyl-substituted 1,3-cyclic acetal and a dicarboxylic acid, in which the cyclic nucleus of said 1,3-cyclic acetal consists of from three to four carbon atoms in addition to the two oxygen atoms at the 1- and 3-positions thereof, (c) a cationic polymerization catalyst, and (d) a blowing agent.
- 2. A process as defined in claim 1 wherein said catalyst comprises boron trifluoride.
- 3. A process as defined in claim 1 wherein the reaction mixture contains a phenolic compound.
- 4. A process as defined in claim 1 wherein said di-(3,4-dihydro-2H-pyranyl) compound is 3,4-dihydro-2H-pyran-2-methyl(3,4-dihydro-2H-pyran-2-carboxylate).
- 5. A cellular product produced in accordance with the process of claim 1.
- 6. A process as defined in 1 wherein said hydroxyl-substituted 1,3-cyclic acetal is a hydroxyalkylmono-1,3-dioxolane.
- 7. A process as defined in claim 6 in which said hydroxyalkyl-mono-1,3-dioxolane is 2,2-dimethyl-4-hydroxymethyl-1,3-dioxolane.
- 8. A process as defined in claim 6 in which said hydroxyalkyl-mono-1,3-dioxolane is 2-vinyl-4-(4-hydroxybutyl)-1,3-dioxolane.
- 9. A process as defined in claim 1 in which said hydroxyl-substituted 1,3-cyclic acetal is a hydroxyalkyl-mono-1,3-dioxane.
- 10. A process as defined in claim 9 in which said hydroxyalkyl-mono-1,3-dioxane is 2-vinyl-5-hydroxymethyl-5-methyl-1,3-dioxane.
- 11. A process as defined in claim 1 in which said hydroxyl-substituted 1,3-cyclic acetal is a hydroxy-bis-(1,3-dioxolanyl)alkane.
- 12. A process as defined in claim 1 in which said hydroxyl-substituted 1,3-cyclic acetal is a hydroxybis(1,3-dioxanyl)alkane.
- 13. A process as defined in claim 1 in which said dicarboxylic acid is a phthalic acid or a halogen-substituted phthalic acid.
- 14. A process as defined in claim 1 in which said dicarboxylic acid is chlorendic acid.
Parent Case Info
This is a division of application Ser. No. 392,497, filed Aug. 29, 1973, now U.S. Pat. No. 3,893,985, issued July 8, 1975. This latter application was filed under Rule 60 and which is a division of application Ser. No. 146,843, filed May 25, 1971, now U.S. Pat. No. 3,784,594, granted Jan. 8, 1974.
US Referenced Citations (5)
Number |
Name |
Date |
Kind |
3306877 |
Schott et al. |
Feb 1967 |
|
3547837 |
Ashikaga et al. |
Dec 1970 |
|
3663470 |
Nishimura et al. |
May 1972 |
|
3673125 |
Takahashi et al. |
Jun 1972 |
|
3737398 |
Yamaguchi |
Jun 1973 |
|
Divisions (2)
|
Number |
Date |
Country |
Parent |
392497 |
Aug 1973 |
|
Parent |
146843 |
May 1971 |
|