Claims
- 1. A curable composition comprising:
- (A) 100 parts by weight of an oxypropylene polymer having groups containing a silicon atom to which a hydroxy group or a hydrolyzable group or both a hydroxy group or a hydrolyzable group is bonded, Mn/Mw of not more than 1.6, and an average molecular weight of at least 6,000,
- (B) from 100 to 200 parts by weight of calcium carbonate of an average particle size of not larger than 0.5 .mu.m, and surface-treated with a fatty acid,
- (C) from 30 to 100 parts by weight of a plasticizer containing at least 5% by weight phthalic acid ester plasticizer,
- (D) from 0.5 to 10 parts by weight of a compound represented by the formula R.sup.1 Si(OCH.sub.3).sub.3 or Si(OCH.sub.2 CH.sub.3).sub.4 wherein R.sup.1 represents a monovalent organic group containing no amino group,
- (E) from 0.5 to 10 parts by weight of a compound represented by the following formula (1),
- R.sup.2 Si(CH.sub.3).sub.n (OR.sup.3).sub.3-n ( 1)
- wherein R.sup.2 represents a monovalent organic group having at least one amino group, R.sup.3 represents CH.sub.3 or CH.sub.2 CH.sub.3, and n represents 0 or 1, and
- (F) from 0.5 to 5 parts by weight of an organotin curing catalyst,
- the total amount of said components (D) and (E) being at least 2 parts by weight, and said component (A) occupying from 15 to 35% by weight.
- 2. The curable composition of claim 1, wherein in component (A) the groups containing a silicon atom to which a hydroxy group and/or a hydrolyzable group is bonded and capable of crosslinking by forming a siloxane bond comprise a group represented by following formula (2); ##STR5## wherein R.sup.4 and R.sup.5 each represents an alkyl group having from 1 to 20 carbon atoms, an aryl group having from 6 to 20 carbon atoms, an aralkyl group having from 7 to 20 carbon atoms, or a triorganosiloxy group represented by the formula (R').sub.3 SiO-- wherein R' represents a monovalent hydrocarbon group having from 1 to 20 carbon atoms and three R's may be the same or different, when two or more R.sup.4 and R.sup.5 exist, they may be the same or different; X represents a hydroxy group or a hydrolyzable group, when two or more Xs exist, they may be the same or different; a represents 0 or an integer of from 1 to 3; b represents 0 or an integer of from 1 to 2; and when two or more ##STR6## exist bs in ##STR7## may be the same or different; m represents 0 or an integer of from 1 to 19, said a and b satisfying a+.SIGMA.b.gtoreq.1.
- 3. The curable composition of claim 1, wherein in component (A), the groups containing silicon atoms to which a hydroxy group and/or a hydrolyzable group is bonded and capable of crosslinking by forming a siloxane bond are represented by the formula; ##STR8## wherein R.sup.5, X, and a are same as described above.
- 4. The curable composition of claim 1, wherein the molecular weight of the oxypropylene polymer of component (A) is at least 10,000 and Mw/Mn thereof is not more than 1.5.
- 5. The curable composition of claim 1, wherein the phthalic acid ester plasticizer is di(2-ethylhexyl phthalate).
- 6. The composition of claim 1 wherein said composition is a one-pack and is contained in a cartridge case.
Priority Claims (1)
Number |
Date |
Country |
Kind |
3-260532 |
Sep 1991 |
JPX |
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Parent Case Info
This application is a continuation of application Ser. No. 07/942,600 filed Sep. 10, 1992, now abandoned.
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Number |
Name |
Date |
Kind |
4618653 |
Kawakubo et al. |
Oct 1986 |
|
4983700 |
Yukimoto et al. |
Jan 1991 |
|
5013807 |
Shimizu et al. |
May 1991 |
|
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EPX |
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Non-Patent Literature Citations (1)
Entry |
Patent Abstracts of Japan, vol. 8, No. 260, Nov. 29, 1984, JP-A-59-138259. |
Continuations (1)
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Number |
Date |
Country |
Parent |
942600 |
Sep 1992 |
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