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US 9,920,229 B2Granted
Cross-linkable masses based on organyl-oxysilane-terminated polymers
AssigneeWacker Chemie AG
InventorsVolker Stanjek, Lars Zander
Life of this patent
Estimating the term…
Abstract
Moisture curable compositions having a low modulus and a high resilience are prepared by curing a composition containing a first polymer which predominately contains two moisture-curable silyl groups, and a second polymer which is terminated by an alkoxy group and contains but a single moisture-curable silyl group, or a hydroxyl group.
Claims18
A moisture-curable composition comprising:
- (A) 100 parts by weight of at least one silane-crosslinking polymer of the formula
- (HO)x—Y—[O—CO—NH—(CR12)b—SiRa(OR2)3-a]2-x (I)
- where
- Y is a divalent polymer radical,
- R each, independently, is the same or different and is a monovalent, optionally substituted hydrocarbyl radical,
- R1 each, independently, is the same or different and is a hydrogen atom or a monovalent, optionally substituted hydrocarbyl radical,
- R2 each, independently, is may be the same or different and is a hydrogen atom or a monovalent, optionally substituted hydrocarbyl radical,
- x is 0 or 1,
- a each, independently, is the same or different and is 0, 1 or 2
- and
- b each, independently, is the same or different and is an integer from 1 to 10,
- with the proviso that component (A) includes less than 15 mol % of polymers of the formula (I) with x=1,
- (B) 5 to 500 parts by weight of at least one silane-crosslinking polymer of the formula
- R6—O—Z—[O—CO—NH—(CR42)d—SiR3c(OR5)3-c]1-y[OH]y (II)
- where
- Z is a divalent polymer radical having no hydroxyl group,
- R3 each, independently, is the same or different and is a monovalent, optionally substituted hydrocarbyl radical,
- R4 each, independently, is the same or different and is a hydrogen atom or a monovalent, optionally substituted hydrocarbyl radical,
- R5 each, independently, is the same or different and is a hydrogen atom or a monovalent, optionally substituted hydrocarbyl radical,
- R6 each, independently, is monovalent, optionally substituted hydrocarbyl radical,
- y is 0 or 1,
- c each, independently, is the same or different and is 0, 1 or 2
- and
- d may be the same or different and is an integer from 1 to 10,
- with the proviso that component (B) includes less than 15 mol % of polymers of the formula (II) with y=1, and,
- (I) from 0.01 to 100 parts by weight of at least one non-reactive plasticizer, wherein the moisture-curable composition has a resilience of at least 70%, and a 100% modulus of from 0.1 to 0.5 Mpa, following cure.
23 more elements
A moisture-curable composition comprising:
- (A) 100 parts by weight of at least one silane-crosslinking polymer of the formula
- (HO)x—Y—[O—CO—NH—(CR12)b—SiRa(OR2)3-a]2-x (I)
- where
- Y is a divalent polymer radical,
- R each, independently, is the same or different and is a monovalent, optionally substituted hydrocarbyl radical,
- R1 each, independently, is the same or different and is a hydrogen atom or a monovalent, optionally substituted hydrocarbyl radical,
- R2 each, independently, is may be the same or different and is a hydrogen atom or a monovalent, optionally substituted hydrocarbyl radical,
- x is 0 or 1,
- a each, independently, is the same or different and is 0, 1 or 2
- and
- b each, independently, is the same or different and is an integer from 1 to 10,
- with the proviso that component (A) includes less than 15 mol % of polymers of the formula (I) with x=1,
- (B) 5 to 500 parts by weight of at least one silane-crosslinking polymer of the formula
- R6—O—Z—[O—CO—NH—(CR42)d—SiR3c(OR5)3-c]1-y[OH]y (II)
- where
- Z is a divalent polymer radical having no hydroxyl group,
- R3 each, independently, is the same or different and is a monovalent, optionally substituted hydrocarbyl radical,
- R4 each, independently, is the same or different and is a hydrogen atom or a monovalent, optionally substituted hydrocarbyl radical,
- R5 each, independently, is the same or different and is a hydrogen atom or a monovalent, optionally substituted hydrocarbyl radical,
- R6 each, independently, is monovalent, optionally substituted hydrocarbyl radical,
- y is 0 or 1,
- c each, independently, is the same or different and is 0, 1 or 2
- and
- d may be the same or different and is an integer from 1 to 10,
- with the proviso that component (B) includes less than 15 mol % of polymers of the formula (II) with y=1, and
- (I) from 0.01 to 100 parts by weight of at least one non-reactive plasticizer
- wherein at least 70 mol percent of component (A) polymers, b=3, R1=H, and a=0, and in the remaining polymers of component (A), b=1, R1=H, and wherein at least 70 mol percent of component (B) polymers, d=1, R4=H, and c=1, wherein the moisture-curable composition has a resilience of at least 70%, and a 100% modulus of from 0.1 to 0.5 Mpa, following cure.
24 more elements
Dependencies are inferred from the claim text.